Startup Burn Rate & Runway Calculator
Know exactly how many months your startup can survive. Enter your monthly expenses and cash on hand — LaunchBiz calculates your runway instantly.
Try It FreeWhat Is Burn Rate?
Burn rate is the speed at which your startup spends money each month. If you spend $15,000 per month and bring in $5,000 in revenue, your net burn rate is $10,000/month. Your gross burn rate is $15,000/month regardless of revenue.
Runway is how long your money will last at your current burn rate. If you have $120,000 in the bank and a net burn of $10,000/month, your runway is 12 months. This is the most important number for any pre-profit startup.
How LaunchBiz Calculates Your Runway
Enter your monthly expenses
Salaries, rent, software, marketing, hosting — everything that costs money each month.
Enter your cash on hand
Total available cash — bank accounts, investments, confirmed funding.
Get your runway
See exactly how many months you have, plus recommendations for extending it.
Example: SaaS Startup Runway
| Category | Monthly |
|---|---|
| Founder salaries (2) | $8,000 |
| Cloud hosting (AWS) | $1,200 |
| Software subscriptions | $600 |
| Marketing & ads | $2,000 |
| Contractor (design) | $1,500 |
| Office & misc | $700 |
| Gross Burn Rate | $14,000 |
| Monthly revenue (MRR) | $3,200 |
| Net Burn Rate | $10,800 |
Cash on hand: $150,000
Runway: 13.9 months (at net burn rate)
Rule of thumb: start fundraising when you have 6 months of runway left. This startup should begin fundraising by month 8.
Track your runway alongside your business plan
LaunchBiz builds financial projections into every business plan — including burn rate, runway, break-even analysis, and cash flow forecasts. All generated automatically from your business description.
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