Burn Rate Calculator
Inputs
Results update liveCite this calculator
Results use the inputs you enter and standard formulas documented on this page. Not professional advice.
Last reviewed: August 2026
Burn Rate Calculator. (August 2026). Useful Tools Online. https://usefultoolsonline.com/burn-rate-calculator/
Interpretation
How Burn Rate Informs Capital Strategy
Burn rate measures how quickly cash leaves the business. Comparing actual bank balance changes with monthly budgeted gross and net spend allows founders to separate temporary timing variances (such as annual software renewals or delayed receivables) from structural spending imbalances.
Example
Scenario Walkthrough
A realistic scenario showing how the calculation guides a practical decision.
A SaaS company begins Q2 with $180,000 in cash and finishes Q2 (3 months) with $120,000. Monthly revenue averages $25,000 while total operating costs (payroll, servers, marketing) average $45,000.
$45,000 / month
$20,000 / month
With $120,000 in ending cash and a $20,000/mo net burn, remaining runway is exactly 6.0 months before reaching zero cash.
Watch out
Common mistakes
- Confusing gross burn with net burn — revenue offsets gross spending to determine real cash drain.
- Ignoring one-time annual vendor prepayments that distort single-month burn rates.
- Assuming accounts receivable will collect on time during high-growth billing periods.
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FAQ
Frequently asked questions
How the calculation works and where its limits are.
What is the difference between gross burn and net burn?
Gross burn is the total amount of cash your business spends each month on operating expenses (payroll, rent, software, marketing). Net burn is gross burn minus your monthly revenue, representing the actual net monthly cash loss.
How do I calculate monthly burn rate from cash balances?
Observed monthly burn equals (Starting Cash - Ending Cash) divided by the number of months in the tracked period. For example, if cash drops from $180,000 to $120,000 over 3 months, observed burn is $20,000 per month.
Why might observed burn differ from budgeted net burn?
Observed burn includes cash timing factors such as annual upfront software renewals, inventory purchases, delayed customer collections (accounts receivable), and tax payments that do not appear evenly on an accrual P&L.
Is this burn rate calculation financial or investment advice?
No. All outputs are deterministic planning estimates based on your entered cash balances and operating numbers. Consult a certified accountant (CPA) or financial advisor before making binding capital decisions.
What should I do after calculating my burn rate?
Divide your remaining cash balance by your net monthly burn to determine your cash runway in months. If runway is under 6 months, consider reducing non-essential operating spend, accelerating revenue, or securing financing.