Startup Burn Rate Calculator
Free Startup Burn Rate Calculator - Cash Runway & Fundraising Planner
Monthly Expenses
Net Burn Rate
-$16,500.00
/month
Gross Burn Rate
$21,500.00
Total monthly expenses
Runway
12 months
✓ Healthy runway
Cash-Zero Date
Jun 2, 2027
If no growth or capital
Break-Even Target
$21,500.00
Need $16,500.00 more/month
Expense Breakdown
How This Calculator Works
Purpose
Calculate your startup's monthly burn rate, net cash consumption, and the exact number of months of runway remaining before cash hits zero. This calculator breaks expenses into meaningful categories (salaries, rent, tools, marketing) so you can see where your spend is concentrated, computes both gross and net burn rate, and projects the specific calendar date your cash runs out — giving you the decision window you need to plan a fundraise, cut costs, or accelerate to profitability.
The Problem It Solves
The most dangerous moment in startup finance isn't losing money — it's losing track of how fast you're losing it. Founders routinely underestimate burn because payroll, contractor payments, software subscriptions, and incidental costs don't all land in the same mental bucket. Building accurate runway models in spreadsheets requires financial modeling skills most founders don't have. This calculator replaces that complexity with a simple, always-accurate input form that converts your expense categories and cash balance into a clear runway forecast — no spreadsheet required.
How to Use It
Step 1: Enter your monthly recurring revenue — be conservative and use actual contracted MRR, not projected. Step 2: Input your expense categories: payroll and contractor costs, office rent, SaaS and tooling subscriptions, and marketing/advertising spend. Step 3: Enter your current total cash reserves (bank account balance). The calculator displays gross burn, net burn, months of runway, the exact cash-zero date, and how much additional monthly revenue is required to break even.
The Formula
Input Fields
- • Monthly revenue
- • Salaries, rent, tools
- • Marketing & other costs
- • Cash in bank
Output Data
- • Net & gross burn rate
- • Runway (months)
- • Cash-zero date
- • Break-even target
- • Expense breakdown
Frequently Asked Questions
What is burn rate and why does it matter for startups?+
Burn rate is the rate at which your startup depletes its cash reserves, measured monthly. Gross burn rate is your total monthly operating expenses regardless of revenue. Net burn rate is gross burn minus monthly revenue — the net cash consumed per month. Burn rate matters because it directly determines your runway: if you have $600,000 in the bank and a net burn of $50,000/month, you have 12 months of runway. Investors, boards, and co-founders all use burn rate as a fundamental health metric. A startup that knows its burn rate precisely can plan fundraising timelines, make informed hiring decisions, and avoid the existential crisis of running out of cash without warning.
How many months of runway should a startup have?+
The industry standard is 18-24 months of runway immediately post-funding round — enough time to reach meaningful milestones, run a fundraising process, and close the next round without desperation. Below 12 months, you should be actively in fundraising conversations. Below 6 months is the warning zone where you'll be fundraising from weakness, not strength. Below 3 months is critical and dramatically limits your options. A fundraising process typically takes 3-6 months from first pitch to wire — some rounds close in 6 weeks, others drag to 9 months. Always start earlier than you think you need to. The best time to fundraise is when you don't desperately need the money.
How do I reduce my startup's burn rate?+
In order of typical impact and reversibility: (1) Go remote or reduce office footprint — office rent is often the largest non-payroll expense and is completely eliminable. (2) Pause non-revenue-generating marketing spend until product-market fit is confirmed. (3) Audit SaaS subscriptions — most startups have tools no one actively uses; cut and renegotiate. (4) Convert full-time roles in non-core functions (design, finance, HR) to fractional or contractor arrangements. (5) Restructure payroll with equity-heavy compensation for early team members who believe in the mission. (6) Focus the entire team on the 1-2 metrics that most directly drive revenue. Cutting burn by 30% adds 43% more runway — the math is powerful.
What is the difference between gross and net burn rate?+
Gross burn rate is total monthly operating expenses before accounting for any revenue — it shows your full cost structure at the current scale. Net burn rate subtracts monthly revenue from gross burn: Net Burn = Expenses − Revenue. If you spend $30k/month and earn $12k, your gross burn is $30k and net burn is $18k. If you've reached $30k monthly revenue, your net burn hits zero and you've broken even operationally. Investors and board members focus on net burn because it directly drives runway. Gross burn matters for operational planning and understanding your fixed cost base. Both numbers appear on this calculator.
Deep Dive: Startup Cash Flow and Runway
Burn rate is the speed at which a startup consumes cash before generating positive cash flow. Gross burn is total monthly cash spent; net burn is gross burn minus revenue. A company spending $200,000/month with $50,000 in revenue has a net burn of $150,000. Runway — the months of cash remaining — is calculated by dividing current cash by net burn. With $1.5M in the bank at $150k net burn, runway is 10 months. This metric dominates startup decision-making because running out of cash is definitionally fatal: it's the one problem with no solution after the fact.
The historical context of burn rate as a critical startup metric emerged during the dot-com era of the late 1990s. Companies like Pets.com and Webvan burned through hundreds of millions of dollars with little path to profitability — Webvan raised $375M in its 1999 IPO and burned through it entirely within two years. The 2000-2001 crash crystallized a generation of investors around unit economics and runway discipline. Paul Graham of Y Combinator famously said the goal of early fundraising is simply to 'not die,' making runway extension a first-order priority.
Default Alive vs. Default Dead is a framework introduced by Paul Graham: if a startup's current growth rate and burn rate are held constant, will it reach profitability before cash runs out? If yes, it's Default Alive — it has options. If no, it's Default Dead — every month without a fix makes fundraising harder and failure more likely. The calculation requires projecting revenue growth against expense growth, a dynamic model more useful than static runway. Many founders misdiagnose their situation by modeling optimistic growth rather than asking what growth rate they need to survive.
Investors scrutinize burn multiple — the ratio of net burn to net new ARR (Annual Recurring Revenue) added. A company burning $500k/month to add $1M ARR annually has a burn multiple of 6x — spending $6 to generate $1 of ARR. Top-quartile SaaS companies in early stage run below 1.5x. Bessemer Venture Partners and other growth-stage investors use this as a capital efficiency signal, because it normalizes burn against productive output rather than absolute size. As interest rates rose in 2022-2023, the market sharply repriced companies with high burn multiples.