Startup Runway and Burn Rate: How Indian Founders Miscount the Months They Have Left
- Runway is cash divided by net burn, and net burn must be measured on money that actually moved — not on the profit and loss account, which counts revenue you have invoiced but not collected.
- Indian startups routinely overstate runway because GST input credit, TDS receivable and advance tax sit in the balance sheet looking like money while being unavailable for months.
- Payroll is not one number: provident fund, ESI and TDS on salary fall due on fixed dates after the salary itself, so a company can clear salaries in full and still default days later.
Ask a founder how much runway the company has and you will usually get a confident answer within two seconds. Ask how it was calculated and the confidence tends to drop. In our experience the number is wrong far more often than it is right, and it is almost always wrong in the same direction — too long. A company that believes it has eleven months when it has seven does not merely get a surprise; it makes an entire year of hiring, pricing and fundraising decisions on a false premise.
This article sets out how to calculate runway properly, the specifically Indian line items that distort it, and the monthly discipline that keeps the number honest.
The definition, and why the simple version misleads
Runway is the number of months the company can continue operating before it runs out of cash:
Runway (months) = Cash in bank ÷ Net monthly burn
Both inputs are more slippery than they look.
Cash in bank means money you can spend today. It does not mean the current assets total. It does not include a fixed deposit pledged against a bank guarantee, a security deposit with a landlord, or a balance in a payment gateway that settles on a T+2 or T+7 cycle. Those are real assets and they belong on the balance sheet, but they will not pay next month's salaries.
Net burn is cash out minus cash in, measured on actual bank movement. This is where most errors live, because founders instinctively reach for the profit and loss account — and the profit and loss account is prepared on an accrual basis. It recognises revenue when you raise the invoice, not when the customer pays. If your enterprise customers pay in 60 to 90 days, a profit-and-loss view of burn will flatter your runway by exactly that lag.
Gross burn versus net burn
Gross burn is total cash going out. Net burn is that figure reduced by cash coming in. Both are worth tracking, for different reasons.
| Measure | What it tells you | When it is the number that matters |
|---|---|---|
| Gross burn | The company's cost base, independent of revenue | Stress-testing — if revenue went to zero tomorrow, this is the bleed |
| Net burn | The actual monthly erosion of the bank balance | Day-to-day runway planning |
| Net burn excluding one-offs | The underlying structural burn | Deciding whether a cost problem is permanent or temporary |
A company with high gross burn and healthy collections can look comfortable on net burn and still be fragile, because its survival depends on customers continuing to pay on time. Investors read gross burn for precisely this reason.
The Indian line items that inflate runway
Several balances common to Indian companies look like money and behave like money in a spreadsheet, while being unavailable when you need them.
| Item | Why it looks like cash | Why it is not |
|---|---|---|
| GST input tax credit | Sits as a recoverable balance and reduces future tax | It only converts to cash by setting off against output tax. If your output is small, or your supplies are zero-rated, it accumulates and waits for a refund that takes months |
| TDS receivable | Tax your customers deducted on your behalf | Recoverable only when the return is filed and processed — typically the following financial year |
| Advance tax paid | Money already out of the door | Gone until assessment. If profits fell after you paid it, you have overpaid and must wait for the refund |
| Unbilled revenue | Work genuinely delivered | Not yet invoiced, therefore not yet even in the collection queue |
| Gateway and marketplace balances | Visible in a dashboard | Settlement cycles, rolling reserves and chargeback holds can lock a meaningful slice |
None of these are accounting errors. They are correct balance-sheet items. The error is treating the balance sheet as a liquidity statement.
Payroll is several deadlines, not one
Founders under cash pressure often clear salaries in full, feel relief, and then default a few days later on the statutory payments that follow the salary. These are separate obligations with their own dates and their own consequences, and the provident fund and employee state insurance components include the employee's own deduction — money withheld from staff rather than belonging to the company.
When you build a cash forecast, model salary, provident fund, employee state insurance and tax deducted at source on salary as distinct outflows on their own dates. A forecast that shows one combined payroll line on the first of the month will understate the pressure in the week that follows.
How to build a forecast that survives contact with reality
A runway number is a single figure; a cash flow forecast is the thing that actually guides decisions. A workable one has four properties.
- Weekly for thirteen weeks, monthly thereafter. Monthly granularity hides within-month troughs. Many companies are solvent on the 30th and short on the 7th.
- Driven by collection dates, not invoice dates. Each receivable should carry the date you realistically expect the money, based on that customer's actual payment history rather than the contractual term.
- Three scenarios, not one. Base, downside with collections slipping by thirty days, and a severe case with your largest customer paying nothing. Runway should be stated as a range.
- Reconciled to the bank every month. A forecast never compared against what happened degrades into fiction within a quarter.
The thresholds that matter
Eighteen months of runway after a raise is the widely used benchmark, and the logic is sound: a serious fundraise takes four to six months, so you need to begin while roughly nine months remain in order to negotiate from a position of choice rather than necessity. Below six months, terms deteriorate sharply, because the other side can see the clock. The practical conclusion is that runway governs when you start raising, and starting late is expensive in dilution long before it is fatal in cash.
If you want this maintained monthly rather than rebuilt in a panic each quarter, that is the core of what a Virtual CFO engagement does — a forecast kept current, reconciled to the bank, with the variance explained.
Common mistakes
- Calculating burn from the profit and loss account. It is accrual-based. Use the bank statement and the cash flow statement.
- Averaging burn over a period containing one-offs. One annual insurance premium or a statutory payment can distort a three-month average badly. Separate recurring from non-recurring.
- Counting committed but undrawn funding as cash. A signed term sheet is not money. Tranches tied to milestones are not money until the milestone is independently accepted.
- Ignoring the tax on growth. Scaling consumes working capital. A company growing quickly can be profitable on paper and short of cash every single month.
- Treating the founder's personal account as a buffer. It obscures the real burn and creates related-party balances that complicate the next round's diligence.
- Reporting a single runway figure to the board. Give the range and the assumption that moves it most. A single number invites false confidence and tells the board nothing about fragility.
A monthly rhythm that keeps the number honest
Close the books by the tenth. Reconcile every bank account. Update collections against actual receipts and re-date anything that slipped. Recalculate gross burn, net burn and runway on all three scenarios. Then ask the only question that matters: has the runway shortened by more than one month since last month? If it has, something structural changed, and it is far cheaper to find out in month three than in month nine.
Founders rarely fail because they could not read a cash flow statement. They fail because nobody produced one in time for the reading to matter.
Do it yourself in minutes — free to try, no login needed.
Open Virtual CFO →Frequently asked questions
What is a good runway for an early-stage startup in India?
Eighteen months after a round is the common benchmark, because a serious fundraise takes four to six months and you want to begin with roughly nine months remaining. Below six months your negotiating position weakens sharply, since the other side can see the clock as clearly as you can.
Should I include GST input credit in my cash balance?
No. Input credit converts to cash only by setting off against output tax, or through a refund that typically takes months. Track it as a recoverable asset, keep it out of the runway calculation, and model the refund as a separate inflow on a realistic date.
What is the difference between gross burn and net burn?
Gross burn is total cash leaving the company. Net burn is gross burn reduced by cash collected. Net burn drives day-to-day runway, while gross burn shows what the bleed would be if revenue stopped — which is why investors ask for it.
How often should a startup update its cash flow forecast?
Monthly at minimum, reconciled to the bank each time, with a rolling thirteen-week weekly view. Monthly-only granularity hides within-month troughs, and many companies are comfortable on the 30th but short on the 7th.
General information for FY 2026-27, not professional advice for your specific case. Rules change — verify against the latest notification or ask a KyaTax expert.
Related: All free tools · More guides · Virtual CFO