Startup Runway Calculator
Calculate exactly how many months of cash you have left — and instantly model what happens if you cut burn or freeze hiring.
Calculate Your Runway
Enter your current financial position to get an instant result.
How do you calculate cash runway and net monthly burn rate?
To calculate cash runway, divide your current liquid cash balance by your net monthly burn rate: Runway = Cash Balance ÷ Net Monthly Burn. Net monthly burn is the net operating cash spent after accounting for incoming receipts: Net Burn = Gross Expenses − Revenue.
Runway is a single, universally-understood number that every founder, investor, and board member needs to know at all times. Here is the exact formula, broken into two steps.
Step 1 — Calculate Net Monthly Burn
If your expenses are $80,000/mo and you bring in $20,000/mo in revenue, your net burn is $60,000/mo. This is the denominator in the runway formula.
Step 2 — Calculate Runway in Months
If you have $600,000 in the bank and a net burn of $60,000/mo, your runway is 10 months. Simple — but easy to miscalculate by forgetting revenue offsets.
What is the difference between gross monthly burn and net monthly burn?
Gross burn is the total operating cash leaving your business each month (payroll, rent, software). Net burn is gross burn minus realized cash receipts: Net Burn = Gross Burn − Cash Receipts. Net burn determines how fast your bank account is depleting, while gross burn shows your absolute operational survival cost if revenue falls to zero.
Founders who only track one of these numbers are flying half-blind. Here is why both matter in every board meeting and investor conversation.
| Metric | Definition | Why It Matters |
|---|---|---|
| Gross Burn | Total monthly operating expenses — payroll, rent, software — before any revenue offset. | Reveals absolute survival cost. Tells you how lean you could get if revenue dropped to zero overnight. |
| Net Burn | Gross burn minus monthly revenue. The true monthly cash outflow you must fund from your bank account. | The number that drives your runway calculation. Use this in fundraising decks and board updates. |
What are the recommended safe cash runway benchmarks for 2026 due diligence?
In 2026, the recommended safe cash runway for venture-backed startups post-fundraise is 24 to 30 months. Due to institutional fundraising cycle expansion (the gap between Seed and Series A has stretched to 616 to 696 days), founders need a larger capital buffer. Broader market runway median sits at 12 months (top-quartile: 22 months). Starting a fundraise requires a minimum 9 to 12 months of cash reserves.
The revenue bar required to clear Series A diligence has risen to $2M to $3M ARR, accompanied by a median burn multiple of 1.6x (1.0x for top-quartile). The seed graduation rate has collapsed to only 15% within 12 months.
Runway Target Benchmarks by Stage
| Funding Stage | Recommended Runway Target | Macroeconomic Reality | VC Due Diligence Focus |
|---|---|---|---|
| Pre-Seed | 12–18 Months | Angel cheques help reach prototype phase. | De-risking basic technology and product-market fit. |
| Seed Stage | 18–24 Months | Median runway is 12 mo; top startups maintain 22 mo. | Scaling repeatable acquisition channels and NRR. |
| Series A | 24–30 Months | Takes 20–23 months of operations to graduate. | Evaluating unit efficiency (burn multiple under 1.6x). |
Runway Remaining Alert & Strategy Grid
| Runway Remaining | Strategic Posture | Market Reality |
|---|---|---|
| 24 to 30 Months | Immediate Post-Fundraise Buffer | Allows company to focus on product and hitting $2M-$3M ARR target. |
| 18 Months | Initiate Outreach and Pitching | Negotiate from a position of leverage; run competitive parallel processes. |
| 9 to 12 Months | Fundraising Danger Zone Threshold | Closing takes 4-9 months; drop below 12 months reduces valuation leverage. |
| Under 6 Months | Distressed Operations / Bridge Required | Startups accept 35-50% lower valuations (safes or venture debt structures). |
The Fundraising Golden Rule
Always begin your next fundraising round exactly 9 to 12 months before hitting cash zero. Fundraising typically takes 4 to 9 months from first pitch to cash in bank—waiting until you have less than 6 months of runway left puts you in a position of desperation during investor negotiations, reducing valuation caps by up to 50%.
Runway Calculator FAQs
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