B2B Startup Burn Rate & Runway Calculator
Forecast startup cash runway, net burn, zero-cash calendar dates, and simulate what-if expense reduction scenarios.
Simulate how trimming non-essential costs extends your runway by months without extra fundraising.
Mastering Startup Capital Management
Cash is the lifeblood of an early-stage company. More startups fail from running out of cash than from competition. By rigorously monitoring gross burn against customer receipts, founders maintain operational control, prevent emergency down-rounds, and navigate changing macroeconomic fundraising cycles with confidence.
Financial Applications
- ✓Board Meetings & Seed / Series A Investor Updates
Present validated cash runway metrics, net burn rate trends, and headcount expansion scenarios clearly to venture capital partners and advisors.
- ✓Fundraising Timeline & Lead Time Planning
Pinpoint your exact 'Zero Cash Date' to ensure your next funding round commences at least 6 months prior to running out of liquidity.
- ✓Emergency Cost Trimming & Default Alive Modeling
Utilize the interactive What-If slider to test how 10% to 30% cuts to SaaS tools or marketing budgets preserve essential engineering runway.
- ✓Annual Budgeting & Hiring Forecasts
Calculate the runway impact of onboarding additional software engineers or sales reps before committing to long-term payroll obligations.
Key Capabilities
Gross Burn vs Net Burn Separation
Accurately distinguishes total monthly cash outflows (gross burn) from actual net losses after incorporating incoming client revenues.
Zero Cash Date Forecasting
Projects the exact calendar month and year when existing bank reserves will be exhausted based on your current trajectory.
Interactive What-If Expense Reducer
Dynamically adjust expense reduction percentages to immediately visualize months added to your operating runway.
Instant Executive Summary Export
Generates clean, investor-ready executive summaries formatted to paste into Notion, Slack, or monthly LP newsletters.
Frequently Asked Questions
What is the difference between Gross Burn and Net Burn?
Gross Burn is the total amount of money your startup spends each month on operating expenses (payroll, servers, marketing, office). Net Burn is the difference between your gross burn and your incoming cash revenue: `Net Burn = Gross Burn - Monthly Revenue`. Net burn determines your actual cash depletion rate.
How is startup cash runway calculated?
Cash runway is calculated as: `Current Cash Balance / Net Monthly Burn`. For example, if you have $600,000 in the bank and lose $50,000 per month net, your runway is 12 months.
What does it mean to be 'Default Alive'?
Coined by Paul Graham (Y Combinator), a startup is 'Default Alive' if its existing revenue growth and expenses allow it to reach profitability before running out of money, without requiring any future equity financing.
How many months of runway should a startup maintain?
Industry standard is 18 to 24 months after a funding round. When runway dips below 12 months, founders should begin active fundraising conversations, as institutional venture rounds typically require 4 to 6 months from pitch to wired funds.
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