Cash Runway Calculator

How This Calculator Works

Cash Runway turns the inputs into a visible formula-based estimate. Use it to compare margin, funnel movement, CAC, revenue, cost, and scenario planning before changing pricing, spend, or operations.

Use the cash runway calculator to model how long cash may last when expenses grow and expected revenue offsets part of monthly burn.

The calculator subtracts net monthly burn from cash and increases expenses each month by the growth assumption.

Example Calculation

$750,000 cash, $90,000 burn, $30,000 revenue, and 2% monthly expense growth produces a shorter runway than the simple 12.5-month estimate.

When to Use This Calculator

• Model runway under growth
• Compare expense scenarios
• Plan fundraising timing

Practical Scenarios

• Run the calculator before changing pricing, spend, hiring, or targets so margin and cash impact are visible. Use case: Model runway under growth.
• Compare conservative, base, and optimistic assumptions when revenue, conversion, CAC, or cost can move quickly. Start with Cash Runway, then compare the changed result with the original.
• Use related business calculators when one metric affects the wider funnel, payback, runway, or profit picture. This is especially useful when you need to plan fundraising timing.

Tips

• Use conservative revenue assumptions
• Model hiring plans separately
• Review runway monthly as actuals change

Common Mistakes

• Ignoring expense growth
• Counting uncertain revenue as guaranteed
• Not separating fixed and variable costs
• Reading revenue as profit before fees, refunds, discounts, labor, taxes, and fulfillment costs are included.
• Mixing monthly, annual, cohort, and campaign numbers in the same calculation.

Assumptions and Limitations

The Cash Runway Calculator is strongest when revenue, cost, margin, period, and funnel assumptions all use the same reporting window. Review the formula, assumptions, and related calculators before using the result in a decision.

• Refunds, chargebacks, taxes, payment fees, labor, seasonality, and contracts can change real outcomes.
• The result is a planning estimate, not accounting, tax, legal, or professional advice.
• Verify assumptions against current records before changing prices, budgets, or strategy.

Cash Runway explains cash runway, startup runway, monthly burn and expense growth through decision context such as margin, period, funnel quality, and cash impact.

Recommended Next Calculators

Related Guides