Startup Runway & Cash Burn Calculator
Calculate your startup's cash runway in months, gross vs. net monthly burn rate, zero-cash date, and future hiring impact for VC fundraising rounds.
Zero-Cash Date: Jun 2028 (Healthy Runway (18+ Mo))
Financial & Headcount Variables
Extending Startup Runway and Managing Cash Burn Rates
For venture-backed and bootstrapped startups alike, cash runway is the fundamental metric of survival. According to CB Insights, running out of cash and failing to raise new capital represents the #1 cause of startup death (38%). Calculating your net monthly burn rate and pinpointing your exact 'Zero-Cash Date' enables founders to initiate Series Seed, A, or B fundraising rounds 6 to 9 months before cash reaches critical danger zones.
Strategic Business Features
Gross vs. Net Burn Rate Tracking
Separates total operational expenses (gross burn) from cash lost after accounting for recurring monthly revenue (net burn).
Zero-Cash Date (ZCD) Projection
Calculates the precise calendar date your bank balance hits zero under current and accelerated spending scenarios.
Headcount & Hiring Expansion Modeling
Simulate the immediate runway compression of hiring engineers, sales reps, or marketing personnel.
Revenue Growth Offset
Factor in Month-over-Month (MoM) revenue compound growth to model runway expansion towards default-alive profitability.
Fundraising Alert Timelines
Automatic alert windows showing when you must start pitching angels and VCs (typically 6-9 months of runway remaining).
Board-Ready Executive Summary
Export structured burn charts and runway tables ready to drop into investor updates.
Executive Use Cases
- ✓Seed & Pre-Seed Founders
Budget post-raise capital allocations across hiring, AWS cloud credits, and customer acquisition.
- ✓Fractional CFOs & Venture Ops
Audit portfolio company cash health and construct dynamic scenario models for board meetings.
- ✓Bootstrapped SaaS Operators
Determine exact break-even dates where organic monthly subscription cash flows surpass operating expenses.
- ✓Rif & Downsizing Scenario Planning
Model how non-labor expense cuts or headcount pauses extend runway to reach milestones.
Frequently Asked Questions
What is the difference between Gross Burn and Net Burn?
Gross Burn is the total amount of cash your company spends each month in operating expenses (salaries, rent, software, legal). Net Burn is the difference between your gross burn and your monthly incoming revenues (Gross Burn - Monthly Revenue = Net Burn).
How many months of runway should a startup maintain?
The venture capital standard is to maintain at least 18 to 24 months of runway following a funding round. When your runway drops below 6 to 9 months, you must either immediately begin pitching investors or enact aggressive spending cuts to reach cash-flow break-even.
What does Paul Graham mean by 'Default Alive'?
A startup is 'Default Alive' if its current cash balance, burn rate, and revenue growth rate will carry it to profitability before running out of money, without needing to raise additional outside capital. If not, it is 'Default Dead'.
How should seasonal revenue be accounted for in burn calculations?
Instead of relying on a single volatile month, calculate your rolling 3-month or 6-month average net burn to smooth out fluctuations from annual software prepayments or seasonal enterprise contracts.
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