Burn Rate & Runway Calculator in USD

Why this calculator exists

In October 2015 Paul Graham wrote "Default Alive or Default Dead?" — the single most cited essay on startup runway since the dot-com era. Graham's observation was simple and devastating: founders systematically misjudged which category they were in. They thought they had more runway than they did. They thought growth would mask cost growth. They thought the next round was easier to raise than it turned out to be. The framework Graham proposed was binary: project your current trajectory forward and ask the simple question — without further fundraising, do you reach profitability before running out of cash? Yes = Default Alive. No = Default Dead. This calculator is a faithful implementation of Graham's simulation, scaled to your stage, country, and cost structure.

Five years later, in April 2020 — right at the COVID liquidity inflection — David Sacks of Craft Ventures (PayPal mafia, Yammer founder) introduced the Burn Multiple in his essay "The Burn Multiple." Sacks' thesis was that all the prior efficiency metrics — Magic Number, CAC payback, Rule of 40 — were too narrow. Magic Number measured sales-only efficiency. Payback measured customer-acquisition recovery. Rule of 40 mixed apples and oranges. What founders and boards actually needed was the simplest possible measure of capital efficiency: how much money do you burn to produce a dollar of net new ARR? Net Burn / Net New ARR. Under 1.0x is amazing. 1.0-1.5x is great. 1.5-2 is good. 2-3 is suspect. Over 3 is bad. The scale stuck because it is intuitive, hard to game (both numerator and denominator come from audited financials), and comparable across stages. This calculator computes Burn Multiple per stage benchmark from Bessemer Cloud Index 2024 medians.

The third pillar is Bessemer's Cloud Index, started in 2013 by Byron Deeter and updated quarterly since. The Cloud Index tracks 50+ public SaaS companies and produces the canonical benchmarks: revenue growth, gross margin, NRR, FCF margin, Burn Multiple, Rule of 40. The medians give founders the answer to "what should I be?" instead of "what am I?" Bessemer's T2D3 (Triple, Triple, Double, Double, Double) is the ideal revenue trajectory from $1M ARR to $100M ARR over 5 years, paired with sub-1.5x Burn Multiple. SaaStr funding-gate medians (Jason Lemkin, 2024): $100K MRR is the seed-to-A bar; $500K MRR is A-to-B; $2M MRR is B-to-C; $12M MRR is C-to-IPO. First Round's State of Startups annual survey calibrates seed conversion rates. PitchBook and Carta supply the round-size + valuation medians. This calculator pulls every number from these primary sources.

What is new in 2024-2026 is the rise of country-specific runway dynamics. A US Series A at $15M raised is roughly an Indian Series A at INR 30Cr because Bengaluru senior engineering cost is one-sixth of Bay Area. A UK seed-stage company gets 50% income-tax relief on investor money via SEIS — a structural advantage US founders cannot access. A Canadian engineering team is 35% cash-back on R&D via SR&ED. A French company gets 30% CIR refundable for the same engineering spend. A German company gets 25% Forschungszulage refundable. An Australian company gets 43.5% R&D Tax Incentive refundable. These are not minor — they extend runway 20-40% structurally for qualifying companies. None of this lives in a generic US-centric burn calculator. All of it lives in the Reality-Check wave above.

The right way to think about this calculator is as a board-pack-grade single source of truth. The Default-Alive verdict tile becomes slide 1. The 60-month cash trajectory chart becomes the heartbeat of every weekly all-hands. The Burn Multiple gauge — calibrated against Sacks' scale and Bessemer's stage median — becomes the headline of every CFO update. The sensitivity panel pre-answers every investor question ("what if growth slows?"). The stress test pre-answers the board's question ("what if cost overrun is 5%?"). The funding-gate ladder pre-answers the founder's own question ("when do we raise next?"). Together they replace the typical 40-slide board pack stitched together from a half-remembered VC conversation with a single calibrated artefact that anchors every conversation to real industry data.

Cited throughout: Paul Graham's October 2015 essay "Default Alive or Default Dead", David Sacks' April 2020 essay "The Burn Multiple", Bessemer Cloud Index Q4 2024 update, SaaStr 2024 funding-gate medians per Jason Lemkin, First Round Capital's State of Startups 2024, PitchBook NVCA Venture Monitor Q1 2025, Carta State of Private Markets Q1 2025, Renaissance Capital IPO Index 2024, NVCA model-document standard terms, Andreessen Horowitz portfolio benchmarks, Sequoia's 2022 "Adapting to Endure" memo, Brad Feld's Rule-of-40 origination, Byron Deeter's T2D3 framework. Every benchmark cites a primary source.

And every quirk — US QSBS 5-year clock, UK EMI options, French BSPCE flat 30% tax, German VSOP real-share reform, Indian Angel Tax abolition, Canadian SR&ED 35% refundable, Australian R&D 43.5%, Japanese J-KISS, Open Innovation Tax Incentive 25% — is encoded so a founder from any of the 8 supported markets opens the page and sees the math the way it actually works in their country. The tool is mobile-first by design — the thermometer fits the iPhone SE viewport, the cockpit sliders all meet the 44px tap target, and prefers-reduced-motion disables every animation for accessibility. Built for the founder reviewing burn on the subway in Bengaluru before a leadership meeting, and for the CFO in the boardroom in San Francisco walking the board through quarterly trajectory.