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Startup Cash Runway Calculator

FAQ

Audit the biological survival window of your venture with our strategic Startup Cash Runway Calculator. Identify the specific date of your 'Default Alive' or 'Default Dead' status to ensure you never iterate past your capital reserves.

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⚠️ Results are for informational purposes only. Please consult a professional for important decisions.

Typical Examples & Data

Scenario Cash / Burn Runway Audit
Pre-Seed $250,000 / $15,000 16.6 Months
Aggressive Growth $1,000,000 / $120,000 8.3 Months
Default Dead $50,000 / $25,000 2.0 Months
Steady State $100,000 / $2,000 50.0 Months

How to Use Startup Cash Runway Calculator

Auditing your venture's lifespan is a streamlined process. Follow these steps to generate your survival profile:

  • Step 1: Input Cash Reserves
    Enter the total amount of usable capital you currently have in the bank.
  • Step 2: Define Monthly Burn
    Enter your total monthly expenses (salaries, AWS, rent) and your current monthly revenue.
  • Step 3: Analyze the Iteration Window
    Click "Audit Runway" to reveal your remaining months and the specific date you must reach profitability.

The Scaling Threshold Audit

Our calculator helps you identify when it is safe to hire. If adding a new engineer reduces your runway from 18 months to 4 months, the audit reveals that you are not yet over-capitalized enough to scale. Use this data to justify every new line item in your budget.

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How to Calculate Startup Runway Manually

To identify your venture's survival window without digital assistance, you must apply the Cash Burn Audit. This separates your total capital from your monthly operational friction to find your "Terminal Date."

  • Step 1: Calculate Net Monthly Burn. Subtract your total monthly revenue from your total monthly expenses. Note: If you are at a loss, this is a negative number.
  • Step 2: Identify Current Cash. Sum your total liquid capital available in all bank accounts.
  • Step 3: Solve for Runway (Months). Divide Total Cash by Net Monthly Burn. (e.g., $100,000 Cash / $10,000 Burn = 10 Months Runway).

Survival Window Auditing

In the discipline of venture capital, **Runway** is the ultimate metric of time. A startup with $1M in the bank and a $200k monthly burn has 5 months to reach profitability or raise another round. By auditing your runway, you identify the "Fatal Date"—the Tuesday afternoon when your bank account hits zero. This clarity allows you to make aggressive "Survival Pivots" long before the situation becomes critical.

Default Alive vs. Default Dead

The most important audit for any founder is determining if you are **"Default Alive."** If your business will reach profitability before running out of cash without any further fundraising, you are Default Alive. If not, you are "Default Dead"—meaning you are mathematically guaranteed to fail unless something fundamental changes in your burn or revenue velocity.

Founder Tip: Never calculate your runway based on "Gross Burn." Always use "Net Burn" (Expenses minus Revenue). As your revenue grows, your runway naturally extends, giving you more "Iterative Cycles" to find the perfect product-market fit.

Frequently Asked Questions

What is a good cash runway for a startup?

Aim for at least 12-18 months of runway. This gives you ample time to hit key milestones, iterate your product, and secure your next round of funding without desperation.
No, for an accurate monthly runway, use only recurring operating expenses (salaries, rent, software). Large one-time costs should be considered separately from your core burn rate.
Gross Burn is the total amount of cash you spend each month. Net Burn is the amount you actually lose after subtracting any revenue you earned. If you are pre-revenue, these numbers will be the same.
The calculator assumes a steady state based on your current Net Burn. However, if your revenue is growing faster than your expenses, your runway effectively extends, buying you more time to reach profitability.
A general rule is to start fundraising when you have 6 to 9 months of runway left. Fundraising can take 3-6 months, and you never want to be negotiating with a bank balance near zero.
If your current growth and expenses allow you to reach profitability before your runway ends, you are 'Default Alive.' If your runway hits zero first, you are 'Default Dead' and must raise more capital or cut costs.
The calculation uses your current monthly burn. If you plan to hire three engineers next month, you should manually increase your burn rate in the calculator to see how those new salaries will shrink your timeline.
You have two levers: increase revenue or decrease expenses (burn). Small cuts in non-essential software, renegotiating rent, or delaying non-critical hires can add several months to your survival time.
The Zero Cash Date is the day your bank account hits $0. Tracking this daily or weekly keeps the reality of your startup's lifespan at the forefront of your strategic decisions.
Yes. Savvy founders often subtract one month's worth of expenses from their total cash before using the calculator. This provides a 'safety net' for unexpected emergencies or late-paying customers.