Burn Rate Calculator

The clock every startup runs against

For a startup that is not yet profitable, cash is the fuel and burn rate is how fast the tank is emptying. Put plainly, burn rate is the amount of cash a company consumes each month to keep operating. Measure the cash you had at the start of a period, the cash you have at the end, and the months in between, and the difference — divided across those months — is your monthly burn. It is the most closely watched number in any founder's dashboard, because it decides how long the venture can survive on its current reserves.

Burn and runway: two sides of one coin

Burn rate only becomes actionable when paired with runway — the number of months your remaining cash will last at the current pace. If a company holds ₹30 lakh and burns ₹5 lakh a month, it has exactly six months of runway. That single number reframes burn from an abstract spending figure into a concrete deadline: the date by which the business must either raise more capital, cut costs, or reach profitability.

Consider a startup that begins a half-year with ₹60 lakh and ends it with ₹30 lakh. It has burned ₹30 lakh, or ₹5 lakh a month, and its remaining ₹30 lakh buys six more months. That is enough time to act — but only if the founders act on it now rather than later.

Gross versus net burn

Two flavours of burn matter. Gross burn is total monthly outflow — salaries, rent, cloud bills, marketing. Net burn is that spending minus revenue, and it is the figure that truly governs survival. Because this calculator works from the actual change in your bank balance, it already captures net burn: any revenue earned during the period has been netted off automatically. Tracking both, however, tells a richer story — gross burn shows your cost base, net burn shows how much revenue is offsetting it.

Managing the burn

The discipline of burn management is not simply spending less; it is spending with runway in mind. The Indian fundraising cycle often takes three to six months, so the widely followed rule is to begin raising or cutting when roughly six months of runway remain — never waiting until the cash is nearly gone, which cripples your negotiating power. Recalculate burn every month, strip out one-off transactions to see the true ongoing rate, and model revenue scenarios so you know how runway stretches in the good case and shrinks in the bad. Handled this way, burn rate stops being a source of anxiety and becomes the instrument that keeps a young company alive long enough to win.