Cash Runway Calculator
Estimate months of cash runway from available cash, monthly cash outflows, and monthly cash inflows. Identify net burn and model a simple cash buffer.
02 / YOUR RESULT
Start with your numbers.
The example calculates when this page loads.
How the calculation works
Net monthly burn = monthly cash outflows - monthly cash inflows. Runway = available cash / positive net monthly burn.
A calculation you can check.
With $45,000 in available cash, $15,000 in monthly outflows and $10,000 in inflows, net burn is $5,000 per month. The simple runway is nine months.
When to use this calculator
Use this cash runway calculator as an early planning signal when the business is spending more cash than it receives. Start with cash available for operations, excluding restricted balances and money already committed to unavoidable near-term payments if those payments are not in your outflow estimate. Use actual cash receipts and payments rather than invoiced revenue and accounting expenses.
Assumptions and limits
The result assumes constant monthly inflows and outflows. It does not model seasonality, a large tax bill, debt maturity, delayed customer payments, or a planned equipment purchase. If inflows meet or exceed outflows, there is no depletion at the entered rates; that does not prove cash is sufficient on every day of the month. Build a dated cash-flow plan for specific payment decisions.
Before you use the result.
What is net burn?
Net burn is cash paid out minus cash received during the same period. Positive burn reduces the available cash balance.
Why does the result sometimes show no depletion?
The entered inflows equal or exceed outflows, so cash is not declining under those constant assumptions.
Does this use revenue or collections?
Use collected cash. Revenue recorded on an unpaid invoice is not yet available to pay bills.
Calculator inputs are processed on your device and are not saved by this tool or sent to MNMVL. The optional CSV download includes your current inputs and result. These are simplified business planning models, not accounting, tax, or investment advice.