Startup Runway and Burn Rate: Calculate, Forecast and extend them
Authored by - Souvik Das, Executive at Outsource360
On 25 March 2022, staff at Fast, the one-click checkout company, were told at their weekly all-hands that the Series C was delayed. On 5 April the company shut down and let go of about 450 people, The Pragmatic Engineer reported. Eleven days. Few failures show the arithmetic of startup runway and burn rate as plainly, because the whole story comes down to how fast the cash went out and how long it could last.
It wasn't a small company, and it hadn't been short of investors. In January 2021 Fast raised a $102 million Series B led by Stripe, taking its total since 2019 to $124.5 million (Crunchbase data, via TechCrunch) at a last valuation of about $580 million post-money (PitchBook data, via TechCrunch). Revenue hadn't followed. Fast generated about $600,000 in 2021, as reported by The Information and cited by NPR, while its burn was "said to be as high as $10 million per month", according to TechCrunch.
Run that peak rate for a full year and it comes to about $120 million. Set against 2021 revenue, that's roughly 200 dollars out for every dollar in (our arithmetic, and illustrative only).
Runway is usable cash divided by net burn. At that burn, Fast's runway wasn't really a number of months. It was a countdown to the next round, so when the round slipped there was nothing left to buy time with. The Information published the revenue and burn figures on 29 March, four days after the all-hands, and from then on staff could follow events only through the press.
New hires were still starting about three weeks before the shutdown. Staff had been shown a "hockey stick" chart whose vertical axis was headcount, not revenue.
Four years on, the rounds come slower. Carta put the median interval between primary funding rounds at 696 days, about 23 months, in Q2 2025, up from about 600 days two years earlier. TechCrunch, citing Carta, reported 966 shutdowns among US startups on Carta in 2024, against 769 in 2023, a rise of about 26%.
A runway plan that assumes the next round arrives on schedule is the plan Fast had, and that schedule has stretched by about three months in two years. Most startups burn nothing like $10 million a month, but the arithmetic is the same at $150,000: usable cash, net burn, the month the cash runs out, and the month you must start raising. The second date is the one most guides skip, and it's the one this guide builds.
A founder who knows both dates decides when to raise, what to cut and what to tell the team. One who doesn't finds out from the bank balance or, as Fast's staff did in the final days, from the press.
Startup runway and burn rate measure the same cash from two sides. Burn rate is the cash spent each month; net burn subtracts cash coming in. Runway is how many months the cash lasts: usable cash divided by average monthly net burn. Because burn rarely stays flat, project runway month by month under base, downside and upside cases.
The sections below work through the calculation, what to leave out of it, how to forecast runway from a hiring plan, how much runway is enough in 2026, and the levers that extend it. Rules and figures differ by country, so US, UK and India examples are labelled.
On this page
What are burn rate and runway? Definitions and formulas
How to calculate burn rate and runway, step by step
How to forecast startup runway with three scenarios
How much runway does a startup need in 2026?
Is your burn rate healthy? The burn multiple and default alive
How to extend runway: the levers, in the order to pull them
What short runway triggers: going concern, directors' duties and covenants
How to report runway to your board, investors and team
Frequently asked questions about startup runway and burn rate
What are burn rate and runway? Definitions and formulas
Burn rate is how much cash a company uses each month; runway is how many months its cash lasts at that rate. Gross burn counts all cash going out, net burn subtracts cash coming in, and runway is calculated from net burn. Four formulas cover startup runway and burn rate.
Gross burn = total cash paid out in the month
Net burn = cash paid out - cash received from customers
Average monthly net burn = (opening cash - closing cash + equity or loans received in the period) / number of months
Runway in months = usable cash / average monthly net burn
The third line adds back financing, so a round or loan that lands mid-period doesn't hide the burn. Skip it, and a bridge quarter looks almost free.
Metric | What it tells you | Unit | Where it misleads |
Gross burn | Total cash going out; what you would spend if revenue stopped | Currency a month | Ignores revenue, so it overstates how fast cash falls for a company with sales |
Net burn | Cash out minus cash in: the real speed of cash loss | Currency a month | One lumpy month (an annual renewal, a tax payment) distorts it; average three months |
Runway | Months until usable cash runs out at the current net burn | Months | Assumes burn stays flat, which hiring plans and growth rarely allow |
Cash-out date | The month usable cash reaches zero in a month-by-month forecast | Calendar month | Only as good as the hiring and revenue assumptions behind it |
Raise-by date | The latest month to start raising and still close with six months of runway left | Calendar month | Depends on how long your raise takes; test a longer one |
Sources: J.P. Morgan for the six-month line; the other cells are definitions.
Gross burn vs net burn: the number runway depends on
Gross burn is the stress number: what the company would spend if every customer stopped paying. Net burn is the runway input, and it counts revenue only as cash received, not as invoices sent. Both are monthly rates, which is why runway comes out in months; the example company used throughout pays out $210,000, collects $60,000 and burns $150,000 net.
Negative net burn means cash-flow positive, so runway stops being the binding limit. The catch? If being cash-flow positive depends on the founders drawing no salary, runway isn't really unlimited, as founder forums note. Rerun the numbers with a market salary for each founder.
Burn rate, runway, run rate and cash flow: four terms founders mix up
Run rate annualises current revenue (this month's recurring revenue x 12), while burn rate is spending net of receipts. One measures scale, the other the speed of cash loss. Cash flow is the net movement of cash, and negative operating cash flow is roughly net burn.
Is runway money or time? Time: an accelerator form asking for your runway wants months, not dollars. And runway is not a cash-out date. That's a calendar month, which only a month-by-month forecast can give.
How to calculate burn rate and runway, step by step
Calculate burn from bank statements, not the profit and loss account: burn is cash, and accrual accounts include non-cash costs and revenue not yet collected. Take three months, strip out one-offs and financing, average them, then divide usable cash by the result.
Export three months of statements for every bank, card and payment account, in every currency.
Add up all cash paid out each month, including payroll taxes, card spend and annual renewals: that is gross burn.
Subtract cash actually received from customers, excluding equity, loans, grants and asset sales: that is net burn.
Remove genuine one-offs, such as a single legal bill, spread annual costs across twelve months, and average the three months.
From the bank balance, deduct restricted cash, covenant minimums, taxes held for authorities and a wind-down reserve.
Divide that usable cash by average monthly net burn to get runway in months.
Replace the flat burn with a month-by-month forecast of hires and revenue to find the cash-out date.
Why three months? A single month is easy to distort, and J.P. Morgan notes that a quarterly period is sometimes used to smooth out unusual inflows or outflows. Step 4 is where, in our view, most errors creep in.
What counts as usable cash, and what to leave out of burn
Usable cash is what you could actually spend. Deduct restricted cash (deposits held as security for a lease or card facility, escrow, cash pledged to a lender) and any venture-loan minimum-cash covenant: that floor isn't spendable, and breaching it can put the loan in default.
Deduct taxes collected but not yet paid over (sales tax, VAT or GST, and payroll withholding such as PAYE or TDS), because that cash belongs to the tax authority. Then hold a wind-down reserve. Companies don't burn to zero: final payroll, notice pay, accrued leave and contract exits come first, and forum veterans reckon a company usually shuts at least a month before zero. The example company reserves one month of gross burn.
An undrawn credit line isn't cash either, as Outsource360's cash flow management guide explains. Leave non-cash costs (depreciation, share-based pay) and financing inflows out of burn, but keep founder salaries and annual costs spread monthly in.
Burn from a month that hasn't closed is a guess, and one founder thread describes a team that found it had been calculating burn wrongly all along. Runway is only as reliable as a monthly close that finishes on time.
A worked example: 14 months of runway on paper
The example company is hypothetical, and every input is ours: a US-incorporated B2B software startup with 14 people (the average Series A team size in Carta's 2025 data), engineers in India and customers paying in US dollars. Gross burn is $210,000 a month ($150,000 of fully loaded payroll, $60,000 of everything else), collections are $60,000 and net burn is $150,000.
Line | Amount |
Bank balance, all accounts | $2,550,000 |
Less restricted cash (lease deposit and card collateral) | -$60,000 |
Less minimum-cash covenant on a venture loan | -$150,000 |
Less sales tax and payroll withholding collected, not yet paid | -$30,000 |
Less wind-down reserve (one month of gross burn) | -$210,000 |
Usable cash | $2,100,000 |
Runway on the bank balance ($2,550,000 / $150,000) | 17.0 months |
Runway on usable cash ($2,100,000 / $150,000) | 14.0 months |
Sources: hypothetical company; all figures are our illustration.
The bank balance says 17 months; usable cash says 14. Both assume burn stays at $150,000, which the company's own hiring plan contradicts.
The division works at any scale. Rs 60 lakh of usable cash at Rs 5 lakh of monthly net burn is 12 months (Rs 1 lakh is 100,000; Rs 1 crore is 10 million), and a $3 million seed at $150,000 of net burn lasts 20 months before deductions, 12 at $250,000.
How to forecast startup runway with three scenarios
Forecast runway month by month rather than dividing cash by today's burn. Build each month's costs from the hiring plan and committed spend, project collections at a stated growth rate, and run three cases. Runway in each case is the month usable cash reaches zero.
This is a monthly planning model. For week-by-week control of payments and receipts, run a 13-week cash flow forecast alongside it.
Forward burn: hiring plan, usage costs and currency
Start with people. Cost every hire at fully loaded monthly cost from the start month: salary plus employer payroll taxes, pension or provident-fund contributions and benefits, which differ by country (see how a fully loaded hire is costed in the US, UK and India). Add committed spend too: signed offers, annual contracts and vendor price rises. One Indian founder thread blamed cloud bills and under-used hires for turning an 18-month plan into 10 months.
Burn steps from $210,000 to $230,000 in month 2 and $250,000 in month 5. In our model those four hires cost about 4.2 months of runway in the base case: 17.1 months without them, 12.9 with them.
AI products shift burn from payroll to inference, which rises with usage. Bessemer's State of AI 2025 found its fastest-growing "Supernova" AI companies averaging about 25% gross margins, often negative, at about $1.13 million of ARR per employee; its "Shooting Stars" ran about 60% margins at about $164,000. Growth itself can shorten runway, so forecast usage costs as users x cost per user.
Currency matters too. The example company holds dollars but pays about half its gross burn ($105,000) in rupees. If a currency move makes those costs 5% dearer in dollars, burn rises about $5,250 a month and flat runway falls from 14.0 to about 13.5 months, or about 13.1 at 10% dearer.
A UK startup with a dollar round and a pound payroll has the same exposure, and an Indian company paying dollar cloud and AI bills from rupees faces the reverse. Holding near-term spend in the currency it's paid in is one option.
Base, downside and upside: one company, three runways
Only collections growth differs between the cases. Two pieces of forum advice shape them: before product-market fit, count only closed deals and run the plan at 100%, 50% and 0% of target. And investors will ask what happens if acquisition cost doubles, so build the table before the pitch.
Case | Collections growth a month | Net burn, month 6 | Net burn, month 12 | Usable cash runs out | Start raising by (four-month raise) |
Flat-burn shortcut | Not modelled | $150,000 | $150,000 | Month 14.0 | Month 4.0 |
Downside | 0% | $190,000 | $190,000 | Month 11.6 | Month 1.6 |
Base | 4% | $174,100 | $153,900 | Month 12.9 | Month 2.9 |
Upside | 8% | $154,800 | $98,900 | Does not run out: low point about $127,000 in month 18; cash-flow positive from month 19 | Not needed to survive; raise for growth |
All cases start with $2,100,000 of usable cash and carry the four planned hires (two from month 2, two from month 5, $10,000 a month each, fully loaded) and $60,000 a month of other costs. Start-raising month = runs-out month - 6 - 4.
Sources: hypothetical company; our model; J.P. Morgan for the six-month line.
The flat shortcut says 14.0 months. The base case runs out in month 12.9 and the downside in month 11.6, because the hiring plan outruns growth. The upside never runs out, but its usable cash bottoms at about $127,000 in month 18, about half a month of costs.
The real question when a company claims a "healthy runway": in which case? The hiring plan, not today's burn, sets runway.
The raise-by date: when to start fundraising
The date that matters most:
Raise-by month = cash-out month - 6 months - the time your raise takes
J.P. Morgan notes that investors "generally scrutinize" startups with less than six months of runway, so close above that line. Y Combinator's low-runway advice adds that in many cases, under two months is "the point of no return". That's why people inside startups say six months of runway is really three.
Assume a four-month raise (an assumption, not a benchmark; test six too). The base case should start raising by month 2.9 and the downside by month 1.6; with a six-month raise, the base case starts in month 0.9 and the downside is already late. Effective runway, the months left until the raise-by date, is under 3 months for a company whose bank balance says 17.
Our rule of thumb: start when forecast runway falls to about 10 months (six plus four), earlier if your raises run longer. And short runway weakens your hand with partners and acquirers. Founders on forums also warn that investor interest without a term sheet usually means there's no lead.
How much runway does a startup need in 2026?
Plan for 24 to 36 months after a round, the range J.P. Morgan says is now "more frequently recommended" in place of the long-standing 18 to 24. That is a post-round target. The floors are different numbers: 12 months (going concern at audit), 6 months (investor scrutiny) and under two months (Y Combinator's point of no return).
Next round | Median time between rounds | Runway to plan for after closing (median gap + 6 months, our arithmetic) |
Any primary round, all stages | 696 days, about 23 months (Carta, Q2 2025) | About 29 months |
Seed to Series A | 774 days, about 25 months (Carta, Q4 2024) | About 31 months |
Series A to Series B | 732 days, about 24 months (Carta, Q4 2024) | About 30 months |
No next round (bootstrapped) | Not applicable | Aim for default alive |
Sources: Carta's bridge-rounds analysis (all-stage row) and time-between-rounds data (stage rows); J.P. Morgan (24 to 36 months).
J.P. Morgan's 24 to 36 months matches this range, and the old 18 to 24 falls short on every row. That's the short answer to the forum favourite, "how much runway is enough?"
Why the 18-24 month rule stopped being enough
In May 2022, Y Combinator's downturn letter, published in full by TechCrunch, told founders to cut costs and extend runway within 30 days, to aim for default alive, and to make sure the company would survive if it could not raise for the next 24 months. And the gap kept widening.
Carta's median interval between primary rounds went from about 600 days to 696 in the two years to Q2 2025, and Carta counted 4,859 rounds in 2025, its lowest in at least six years and 41% below 2021. Bain and IVCA put Indian venture capital at about $16 billion in 2025. That's far below 2021's $38.5 billion, which had already fallen 33%, to $25.7 billion, in 2022.
Early 2026 data splits the market: over 60% of Q1 2026 capital on Carta went to AI. The takeaway for non-AI founders: plan for gaps at least as long as today's.
How much to raise: working back from the runway you need
Round size = target runway in months x planned average monthly net burn - usable cash at close + any top-up to the wind-down reserve
Set the target at the median gap to your next round plus the six-month floor. The example company closes in month 6.9 of its base case with about $960,000 of usable cash: 29 months x $250,000 of planned average net burn is $7.25 million, less $960,000, plus a $90,000 top-up lifting the reserve from $210,000 to $300,000, gives about $6.4 million. The old 18-month rule gives about $3.6 million, so the data-implied round is about 75% larger (our calculation).
Fair warning: $7.25 million lasts 29 months at $250,000 a month but only about 18 at $400,000, so pace hiring to the plan. And investors will rebuild the burn from bank outflows anyway (see how investors rebuild burn in due diligence), and there is no reliable public burn-by-stage benchmark.
Runway for bootstrapped and services businesses
With no next round, a bootstrapped or services business aims for default alive: profitability on the cash it already has. For an agency, the useful stress test is runway if its largest client stopped paying (usable cash divided by net burn without that client's receipts); buffer days are in the cash flow guide.
In practice, bootstrapped and venture-backed burn differ in kind, not degree, and a bootstrapped company that wants outside money should raise before runway forces it. And a founder's savings set how long an unpaid founder can last: one more reason to put founder pay in burn.
Is your burn rate healthy? The burn multiple and default alive
There is no universal good burn rate. Healthy burn buys growth efficiently, and the standard test is the burn multiple: net burn divided by net new annual recurring revenue over the same period. Craft Ventures' burn-multiple framework (2020) rates under 1x as amazing and over 3x as bad.
Burn multiple | Craft Ventures' label | What it tells you (our reading) |
Under 1x | Amazing | Each dollar of new ARR costs less than a dollar of net burn |
1x to 1.5x | Great | Efficient growth by any stage's standard |
1.5x to 2x | Good | Healthy after Series A |
2x to 3x | Suspect | Acceptable only early; check acquisition cost and payback |
Over 3x | Bad | Burn is buying too little growth: extend runway by cutting |
Sources: Craft Ventures (2020) for the bands and labels; the right-hand column is ours.
The burn multiple: is your burn buying growth?
Burn multiple = net burn / net new ARR (same period)
Craft Ventures introduced the measure in April 2020, arguing that investors scrutinise burn harder in downturns. Its own example: $2 million burned for $1 million of new ARR is 2x, "reasonable". The framework puts typical multiples at roughly 3x at seed and 2x after Series A.
So is the example company's burn buying growth? Over months 1 to 3 (ARR approximated as monthly collections x 12), the base case burns $475,200 for $89,900 of net new ARR: about 5.3x, bad. But the upside burns $459,600 for $187,000, about 2.5x: suspect, yet inside the seed-stage norm of about 3x. The downside adds no ARR, so its multiple can't be calculated at all.
That makes the multiple a cut-or-grow test (our rule): well above 3x at seed, extend runway by cutting; near or below the stage norm, the burn may be buying growth worth funding. Without subscriptions, use the increase in annualised gross profit instead of net new ARR; either way, AI inference costs sit in burn, so the multiple catches them automatically. The Rule of 40 (revenue growth rate plus profit margin of at least 40%) is a later-stage test, not a seed-stage one.
One Indian founder described spending close to Rs 1 crore on marketing and sales in a year, and another thread says most founders spot runaway burn too late. The multiple is the early warning.
Default alive or default dead: a worked test
Y Combinator's widely cited default-alive essay (2015) asks one question: on current expenses and current revenue growth, does the company reach profitability on the money it has? The essay reported that half the founders its author spoke to did not know.
Here's the test on the example company (our model). At current spend only ($210,000 a month, no new hires), collections must grow about 5.3% a month to be default alive, and even then usable cash nearly touches zero before collections overtake costs in month 25. But at 4% it's default dead: cash runs out in month 17.1, while the lines would cross only in month 32.
Add the hiring plan and the threshold rises to about 7.5% a month. The base case (4%) runs out in month 12.9 against a crossing in month 37, while the upside (8%) crosses in month 19 with about $127,000 to spare: default alive by a whisker.
One caveat, from a Hacker News discussion: the original calculator assumes 100% gross margin, so non-software businesses should use gross profit. Default dead is a planning fact, not a verdict, because survival then depends on the raise-by date or on cuts. But cutting to default alive at the expense of growth leaves a zombie, alive but not growing, so check the burn multiple first.
How to extend runway: the levers, in the order to pull them
Pull the fastest, most reversible levers first: non-payroll spend, hiring timing, pricing, then turning fixed capacity variable. Cut existing headcount or borrow only after those. On the example company, those four add about 2.1 months without a single redundancy.
Lever | What the model changes | Runway after this step | Months gained | Lead time and reversibility |
Starting point: base case | Collections +4% a month; hires from months 2 and 5 | 12.9 months | - | - |
1. Cut non-payroll spend 15% | $60,000 to $51,000 a month from month 1 | 13.8 months | +0.9 | Days to weeks; easy to reverse |
2. Phase hiring | Go-to-market hires start in month 9, not 5 | 14.4 months | +0.6 | Immediate for unsigned offers; no severance |
3. Raise prices 5% | Collections 5% higher from month 4; no extra churn | 14.7 months | +0.3 | One to three months |
4. Make one planned role variable | One month-9 role outsourced or part-time, at half the loaded cost | 15.0 months | +0.3 | Weeks; stops at contract end |
Levers 1-4 together | - | 15.0 months | +2.1 | Start-raising month moves from 2.9 to 5.0 |
Instead: cut existing payroll 20% | $150,000 to $120,000 from month 3, plus a month's pay in month 2 | 15.6 months | +2.7 | Notice and consultation rules apply; hardest to reverse |
Sources: hypothetical company; our model, with levers applied in sequence.
Already down to two or three months? Start with the cash flow guide's 72-hour triage.
Spending, pricing and capacity levers you can pull this month
Start with tools, cloud, rent and vendor consolidation. AI-heavy products can also switch models, cache, or move off rented GPUs to on-device or owned servers.
Worth flagging: a customer prepayment lengthens runway only when the prepaid period reaches past your cash-out date. A 12-month prepayment adds nothing to a 13-month runway and costs the discount, while a 24-month one adds months. Part-time, fractional or outsourced capacity makes a planned role a cost you can stop.
In India, paying micro or small suppliers beyond the 45-day limit in s.15 of the MSMED Act, 2006 triggers compound interest at three times the RBI bank rate (s.16). The late-paid expense is also deductible only when paid, under s.37(2)(g) of the Income-tax Act, 2025 (successor to s.43B(h) of the Income-tax Act, 1961).
Headcount: the biggest lever, and the slowest
Payroll is about 71% of the example company's gross burn, so phase planned hires before touching existing staff. A 20% payroll cut adds about 2.7 months, more than levers 1 to 4 combined, but it's the hardest to undo. And one decisive cut, we'd argue, does less damage than several small ones.
Cuts take time.
United States: employers with 100 or more employees owe 60 days' notice of a plant closing or mass layoff (WARN Act). A narrow "faltering company" exception covers only plant closings at firms actively seeking capital.
United Kingdom: 20 or more redundancies at one establishment within 90 days need collective consultation from at least 30 days before the first dismissal (45 for 100 or more) and an HR1 notice.
India: retrenching a worker with a year's service costs a month's notice or pay in lieu, 15 days' average pay per completed year and notice to the government (s.70 of the Industrial Relations Code, 2020). Factories, mines and plantations with 300 or more workers need three months' notice and prior permission (s.79).
Brex laid off 282 people, about 20%, in January 2024. By June 2024 it said burn had halved in a year and it had four years of runway; it later said it grew 49% and was operating-cash-flow positive for the first time in August 2025. Capital One agreed to buy it for $5.15 billion in January 2026, completing on 7 April 2026, against a last private valuation of $12.3 billion: the cut worked, and a reset valuation was part of the price.
Bridge rounds and venture debt: buying time, at a price
Bridge rounds were 16.6% of all capital raised on Carta in Q2 2025 (22.5% at Series A), against typically under 10% a quarter in 2021. A bridge from existing investors buys months at the cost of dilution; venture debt limits dilution, but its minimum-cash covenant cuts usable cash and repayments raise burn later. A down round resets the valuation: Carta's down-round rate was 11.4% in Q1 2026, from a peak of about 22% in 2023. In India, venture debt reached $1.38 billion across 187 deals in 2025, up 12%, according to the lender Stride Ventures' own report, via YourStory.
What short runway triggers: going concern, directors' duties and covenants
When projected cash covers under 12 months from the date the accounts are signed, going concern becomes a live audit question and lenders test their covenants. In the UK and India, directors who keep trading once insolvency can no longer reasonably be avoided risk personal liability.
Dunzo, an Indian quick-commerce app, shows the endgame. Reliance Retail led its $240 million round in January 2022. Dunzo's FY23 consolidated filings showed operating revenue of Rs 226 crore, a loss of Rs 1,801 crore (Rs 9.09 spent per rupee of operating revenue) and Rs 216 crore of cash and bank balances at 31 March 2023. At the FY23 loss rate of about Rs 150 crore a month, that's under 1.5 months of cash (our indicative arithmetic: a loss is not cash burn, and costs were being cut).
In 2023 Dunzo delayed salaries, having sought as much as $150 million and secured about $45 million. The app went offline in January 2025, and Reliance's FY25 annual report valued its stake, carried at Rs 1,645 crore a year earlier, at nil. The figures were public because Indian companies file financial statements with the Registrar within 30 days of the AGM (s.137 of the Companies Act, 2013).
Going concern: the 12-month test in an audit
Accounts assume the company will keep operating. Management assesses that; auditors test it over a 12-month look-forward whose start date differs by framework.
Framework | Who applies it | Look-forward period | Measured from |
US GAAP: ASC 205-40 (ASU 2014-15) | Management | One year | The date the statements are issued (or available to be issued) |
US private-company audits: AU-C 570 (SAS 132) | Auditor | One year, aligned with ASC 205-40 | The same date |
US public-company audits: PCAOB AS 2415 | Auditor | A reasonable period, not exceeding one year | The date of the statements audited |
IFRS: IAS 1 paras 25-26 (IAS 8 paras 6K-6L from 2027) | Management | At least 12 months, a minimum not a cap | The end of the reporting period |
ISA 570 (Revised 2024), periods beginning on or after 15 December 2026 | Auditor | Asks management to extend any assessment under 12 months | The date the statements are approved |
India: SA 570 (Revised), ICAI | Auditor | Asks management to extend to at least 12 months | The date of the financial statements |
India: Companies Act 2013 s.134(5)(d) | Directors | A going-concern statement in every board's report | Each year's accounts |
Sources: FASB; AICPA; PCAOB; IFRS Foundation; IAASB; ICAI; Companies Act 2013 s.134(5)(d).
If the example company signs in month 3, its base case leaves about 10 months of cash, so management needs a plan the auditor can test, such as a raise in progress. From 2027, IFRS 18 moves these requirements, unchanged, into IAS 8.
Why does this bite now? With about 23 months between rounds, many venture-backed companies will sign accounts with under 12 months of cash. And a going-concern paragraph can trip venture-debt covenants and unsettle customers' procurement teams.
Directors' duties when the cash is running out
United Kingdom. Under s.172(3) of the Companies Act 2006, the duty to promote the company's success is subject to any rule requiring directors to consider creditors' interests. In BTI 2014 LLC v Sequana SA [2022] UKSC 25, the Supreme Court held that the creditor duty is engaged when directors know or ought to know the company is insolvent or bordering on insolvency, or that insolvent liquidation or administration is probable. A real and not remote risk of insolvency is not enough on its own.
Under s.214 of the Insolvency Act 1986, a director who knew or ought to have concluded there was no reasonable prospect of avoiding insolvent liquidation or administration can be ordered to contribute, unless they took every step to minimise creditors' losses. The Insolvency Service's guidance explains both duties.
India. Under s.66(2) of the Insolvency and Bankruptcy Code, 2016, a director can be made to contribute if, before insolvency proceedings began, they knew or ought to have known there was no reasonable prospect of avoiding them and did not exercise due diligence to minimise creditors' potential loss. If carrying on isn't viable, see the routes for closing an Indian company.
United States. Duties depend on the state of incorporation; take counsel's advice once insolvency is possible. Everywhere, minuted monthly runway reviews and the three-scenario model record what the board knew and considered.
How to report runway to your board, investors and team
A board-ready runway report fits on one page: this month's burn against plan, runway under the base, downside and upside cases, the raise-by date and what changed since last month. Update it monthly, after the books close, and show usable cash rather than the bank balance.
A one-page runway report for the board
Why one page? So the board sees the forecast, not just the bank balance. Open with a burn bridge from last month's net burn to this month's (new hires, one-offs, collections), then the three-case runway with each cash-out month, the raise-by date, the variance to plan and the decision the board is being asked to take.
Review it monthly after the close, and again whenever a hire, a large contract or a missed sales month changes the plan. One founder described checking roughly monthly until the company took off, which in our view is about the right rhythm at seed.
The good news is that a spreadsheet is enough at seed if it has three parts: inputs (hiring plan, growth rates, costs), the monthly cash model and a scenario page. Ownership usually moves from a founder to a finance lead, or to a fractional or virtual CFO, as the company grows. In India, no statute requires a private company to report runway to its investors; that duty comes from the information rights in the shareholders' agreement.
What to tell employees and candidates about runway
Candidates and employees now ask to see the bank balance, and forum advice to engineers is blunt: without the real balance, a runway figure means little. And they apply their own discount, reading six months of runway as three. Runway has become a talent-market signal. A Reddit thread describes a team that lost all motivation when cash got tight; Fast's staff were left following events through the press, and Dunzo's salary delays were runway exhaustion made visible.
What should you share? The usable-cash runway range, the raise-by date and what happens at each trigger, but not access to the bank account.
Seven mistakes that make runway look longer than it is
Run the list before every board meeting; each item inflates runway on paper.
Dividing the bank balance instead of usable cash.
Using one month's burn, or averaging in a lumpy prepayment or a month that has not closed.
Leaving out committed spend: signed offers, annual contracts and planned hires.
Counting projected revenue before it is booked.
Treating unpaid founders as free, so runway only works while nobody draws a salary.
Ignoring the gap between the currency you hold and the currency you spend.
Starting the raise from flat-burn runway instead of the forecast cash-out date.
Frequently asked questions about startup runway and burn rate
What does runway mean for a startup?
Runway is the number of months a startup can keep operating before its usable cash runs out. The most useful companion figure is the cash-out date: the month cash runs out in a forecast that includes planned hires and revenue growth.
Is burn rate measured monthly or annually?
Monthly: burn rate is the cash a company uses per month, so runway comes out in months. Use a trailing three-month average of net burn, so one unusual month, such as an annual renewal, doesn't distort it.
What does negative burn mean?
Negative net burn means more cash is coming in than going out, so the company is cash-flow positive and runway stops being the binding limit. Check that it still holds once the founders are paid a market salary.
What is a going-concern warning?
It's a disclosure of substantial doubt that a company can meet its obligations over the look-forward period: one year after the accounts are issued under US GAAP, and at least 12 months from the reporting date under IFRS. Runway under 12 months at signing puts it on the table.
How many months of runway should a startup have after raising?
Plan for 24 to 36 months, which J.P. Morgan says is now more frequently recommended. Carta put the median gap between primary funding rounds at 696 days, about 23 months, in Q2 2025, so the old 18-month target often runs out first.
Does burn rate include founder salaries?
It should. If runway only works because the founders take no pay, it's overstated. Put a realistic founder salary into the forecast, even if you agree to defer paying it.
Should a pre-revenue startup count projected sales in its runway?
Count only signed or booked revenue before product-market fit. Then run the forecast at 0%, 50% and 100% of the sales plan, and set the date to start raising from the weakest case.
How do you calculate runway if revenue is growing?
Forecast month by month. Add planned hires and committed costs, grow collections at a realistic rate, and find the month usable cash reaches zero. Dividing cash by today's burn ignores both the growth and the new spending.
How much runway should be left when you start raising a round?
Work back from the cash-out date: allow six months, the level below which J.P. Morgan says investors scrutinise startups more cautiously, plus the time your raise takes. With a four-month raise, start at about 10 months of forecast runway.
How do you calculate the burn multiple?
Divide net burn by net new annual recurring revenue for the same period. A company that burns $600,000 in a quarter and adds $200,000 of net new ARR has a burn multiple of 3x.
What is the difference between run rate and burn rate?
Run rate annualises current revenue, such as this month's recurring revenue times 12. Burn rate is monthly cash spending net of receipts. One measures scale; the other, how fast cash is falling.
What is the difference between default alive and default dead?
A default-alive company reaches profitability on the cash it already has, at its current costs and growth rate. A default-dead company runs out of cash first, so it survives only by raising money or cutting costs in time.
Runway model or 13-week cash forecast: which does a startup need?
Both, for different questions. A monthly runway model shows how long cash lasts and when to start raising. A 13-week cash forecast shows whether you can pay what falls due each week, which matters most when runway is short.
What is a good burn multiple at seed stage?
Craft Ventures' framework puts typical multiples at roughly 3x at seed and 2x after Series A, and rates under 1x as amazing. Well above 3x means burn is buying too little new revenue, so extending runway by cutting usually beats growing into it.
Why is six months of runway often really three?
Companies rarely spend to zero. Final payroll, notice pay and wind-down costs need a reserve, and Y Combinator warns that under two months of cash is, in many cases, "the point of no return". That can leave about three months to act.
Is venture debt a good way to extend runway?
It can add months with little dilution, but it isn't free runway. Any minimum-cash covenant is cash you can't spend, and repayments raise burn later. Model runway net of the covenant and the repayment schedule before you sign.
References
Statutes, judgments, regulators and official guidance come first, then professional and international standard-setters, then data and research (most recent first), then reporting and company statements.
United States Congress, Worker Adjustment and Retraining Notification Act, 29 U.S.C. 2102 (notice required before plant closings and mass layoffs), 1988, text via the Legal Information Institute, accessed 22 September 2026, law.cornell.edu.
Public Company Accounting Oversight Board, AS 2415, Consideration of an Entity's Ability to Continue as a Going Concern, accessed 22 September 2026, pcaobus.org.
Financial Accounting Standards Board, Accounting Standards Update No. 2014-15, Presentation of Financial Statements - Going Concern (Subtopic 205-40), August 2014, fasb.org (PDF).
UK Parliament, Companies Act 2006, section 172 (duty to promote the success of the company), accessed 22 September 2026, legislation.gov.uk.
UK Parliament, Insolvency Act 1986, section 214 (wrongful trading), accessed 22 September 2026, legislation.gov.uk.
UK Supreme Court, BTI 2014 LLC v Sequana SA and others [2022] UKSC 25, judgment of 5 October 2022, supremecourt.uk.
The Insolvency Service, Director information hub: director duties upon insolvency, 5 October 2023, gov.uk.
UK Government, Making staff redundant: redundancy consultations (collective consultation and form HR1), accessed 22 September 2026, gov.uk.
Parliament of India, Companies Act, 2013, section 134(5)(d) (going-concern statement in the directors' responsibility statement), text via Indian Kanoon, accessed 22 September 2026, indiankanoon.org.
Parliament of India, Companies Act, 2013, section 137 (copy of financial statement to be filed with Registrar), text via Indian Kanoon, accessed 22 September 2026, indiankanoon.org.
Parliament of India, Insolvency and Bankruptcy Code, 2016, section 66 (fraudulent trading or wrongful trading), text via Indian Kanoon, accessed 22 September 2026, indiankanoon.org.
Parliament of India, Industrial Relations Code, 2020 (in force from 21 November 2025), section 70 (conditions precedent to retrenchment of workers), text via Indian Kanoon, accessed 22 September 2026, indiankanoon.org.
Parliament of India, Industrial Relations Code, 2020, section 77 (application of Chapter X), text via Indian Kanoon, accessed 22 September 2026, indiankanoon.org.
Parliament of India, Industrial Relations Code, 2020, section 79 (conditions precedent to retrenchment of workers to which Chapter X applies), text via Indian Kanoon, accessed 22 September 2026, indiankanoon.org.
Parliament of India, Micro, Small and Medium Enterprises Development Act, 2006, section 15 (liability of buyer to make payment), text via Indian Kanoon, accessed 22 September 2026, indiankanoon.org.
Parliament of India, Micro, Small and Medium Enterprises Development Act, 2006, section 16 (date from which and rate at which interest is payable), text via Indian Kanoon, accessed 22 September 2026, indiankanoon.org.
Parliament of India, Income-tax Act, 2025, section 37(2)(g) (deduction on actual payment only; successor to section 43B(h) of the Income-tax Act, 1961), text published by the Central Board of Direct Taxes, accessed 22 September 2026, incometaxindia.gov.in.
AICPA Auditing Standards Board, Statement on Auditing Standards No. 132, The Auditor's Consideration of an Entity's Ability to Continue as a Going Concern (AU-C 570), February 2017, aicpa-cima.com.
IFRS Foundation, Going concern - a focus on disclosure (educational material on IAS 1 paragraphs 25-26, which IFRS 18 moves to IAS 8 paragraphs 6K-6L from 2027), 2025, ifrs.org (PDF).
International Auditing and Assurance Standards Board, ISA 570 (Revised 2024), Going Concern, published 9 April 2025, effective for audits of periods beginning on or after 15 December 2026, iaasb.org.
Institute of Chartered Accountants of India, SA 570 (Revised), Going Concern, effective for periods beginning on or after 1 April 2017, icai.org (PDF).
Carta, State of Private Markets: Q1 2026, 29 May 2026, carta.com.
Bain & Company and IVCA, India Venture Capital Report 2026, 1 April 2026, bain.com.
Carta, State of Private Markets: 2025 in Review, 18 February 2026, carta.com.
Carta, Bridge Rounds Got a Boost in Q2 (bridge rounds and time between primary rounds, Q2 2025), 19 September 2025, carta.com.
Bessemer Venture Partners, The State of AI 2025, 13 August 2025, bvp.com.
Carta, Startup Headcount Is in a Deep Freeze Across All Sectors, 15 May 2025, carta.com.
Carta, Typical Time Between VC Rounds is Shrinking in SaaS, Rising in Fintech (Q4 2024 data), 19 March 2025, carta.com.
J.P. Morgan, Creating a cash runway for your startup, 3 December 2024, jpmorgan.com.
Bessemer Venture Partners, The Rule of X, 2 January 2024, bvp.com.
Bain & Company and IVCA, press release: 2022 VC investment value in India softened significantly, 15 March 2023, bain.com.
Y Combinator, Economic Downturn letter to founders, published in full by TechCrunch as "YC advises founders to 'plan for the worst'", 19 May 2022, techcrunch.com.
Craft Ventures, The Burn Multiple: How Startups Should Think About Capital Efficiency, April 2020, medium.com.
Y Combinator, Default Alive or Default Dead? (essay of October 2015, YC Startup Library), ycombinator.com.
Y Combinator, Advice for Companies With Less Than 1 Year of Runway, 22 January 2015, ycombinator.com.
Capital One, Capital One Completes Acquisition of Brex, 7 April 2026, capitalone.com.
YourStory, Venture debt registers 12% growth in 2025, says report (on Stride Ventures' India venture debt report), 8 April 2026, yourstory.com.
CNBC, Capital One is buying startup Brex for $5.15 billion in credit card firm's latest deal, 22 January 2026, cnbc.com.
Brex, The turnaround is over, 2 October 2025, brex.com.
Inc42, Reliance Retail Formally Writes Off INR 1,645 Cr Investment In Dunzo, 8 August 2025, inc42.com.
TechCrunch, citing Carta, 2025 will likely be another brutal year of failed startups, data suggests, 26 January 2025, techcrunch.com.
YourStory, Dunzo goes offline as investors, co-founder depart, 14 January 2025, yourstory.com.
TechCrunch, Fintech Brex abandons co-CEO model, talks IPO, cash burn and plans for a secondary sale, 12 June 2024, techcrunch.com.
TechCrunch, Brex cuts 20% of staff amid reports of stalled growth, high burn, 23 January 2024, techcrunch.com.
Entrackr, Dunzo posts Rs 1,800 Cr loss, Rs 226 Cr revenue in FY23, 6 November 2023, entrackr.com.
TechCrunch, Dunzo, backed by Reliance and Google, delays employee salaries again, 30 August 2023, techcrunch.com.
The Pragmatic Engineer, The Scoop: Inside Fast's Rapid Collapse, 7 April 2022, pragmaticengineer.com.
NPR, Fast, the easy checkout startup, shuts down after burning through investors' money, 5 April 2022, npr.org.
TechCrunch, Fast shuts doors after slow growth, high burn precluded fundraising options, 5 April 2022, techcrunch.com.
TechCrunch, Reliance Retail backs Dunzo in $240 million funding, 6 January 2022, techcrunch.com.
Disclaimer
This article is for educational and general business information purposes only and does not constitute professional legal, financial, tax or accounting advice. For guidance specific to your situation, consult a qualified professional. The example company and every model figure are hypothetical illustrations, and US, UK and Indian rules change, so check each rule against its current source before relying on it.
Comments