review.firstround.com · 2025-09-30 · 246d

Understanding Cash Runway: A Founder's Guide to Financial Survival

Cash runway measures how long a startup can operate before depleting its cash reserves, calculated by dividing current cash balance by monthly burn rate. The article explains the formula, SaaS-specific considerations, industry benchmarks, and strategies for extending runway through cost optimization, profitability improvements, and fundraising.

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Metrics in this report

Example Startup Cash Runway (Scenario 1)

6months

calculated

$600K cash balance with $100K monthly burn

Example Startup Cash Runway (Scenario 2)

10months

calculated

$600K cash balance with $60K monthly burn (after $40K revenue)

Recommended Cash Runway

12-18months

standard rule of thumb

general startup operations

Recommended Cash Runway (Tight Market)

24-36months

recommended

during tighter fundraising markets