Glossary term
Burn Rate
Burn rate is the pace at which a business uses cash, usually measured monthly for startups and growth companies.
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What Is Burn Rate?
Burn rate is the pace at which a business uses cash over time. It is most common in startups, early-stage companies, and growth businesses that are spending more cash than they currently generate.
Burn rate helps owners, founders, lenders, and investors estimate how long the business can operate before it needs more revenue, lower costs, new financing, or a change in strategy.
Key Takeaways
- Burn rate measures how quickly a company uses cash.
- It is often expressed as monthly net cash burn.
- Runway estimates how many months cash can last at the current burn rate.
- High burn is not always bad if it supports durable growth, but it raises financing risk.
- Burn rate should be tracked with cash balance, revenue quality, margins, and funding plans.
How Burn Rate Works
A simple net burn calculation is:
Cash outflows are payments for payroll, rent, software, marketing, inventory, taxes, debt service, and other costs. Cash inflows include customer receipts, collections, and other operating cash received during the same period.
Runway uses burn rate to estimate time:
Cash balance is available cash. Monthly net burn rate is the amount of cash used each month after cash inflows. If a company has $600,000 of cash and burns $100,000 per month, its rough runway is six months.
Many teams review burn monthly because a single large annual number can hide timing problems. Payroll, customer collections, prepaid contracts, and delayed invoices can all change the cash picture before the income statement looks alarming.
Gross Burn Versus Net Burn
Measure | What it includes | Best use |
|---|---|---|
Gross burn | Total cash spent | Understanding cost base |
Net burn | Cash spent minus cash received | Estimating runway |
Runway | Cash balance divided by net burn | Timing financing or cost decisions |
Break-even point | When inflows cover outflows | Assessing sustainability |
Why It Matters
Burn rate turns a cash balance into a timeline. That timeline affects hiring, marketing, product spending, fundraising, debt capacity, and the urgency of revenue growth.
The metric can show whether management is using capital efficiently or relying too heavily on future financing. It can also make trade-offs clearer when a company must choose between growth spending and extending runway.
Limits and Misunderstandings
Burn rate is not the same as accounting loss. Accrual revenue, noncash expenses, prepaid costs, delayed collections, and working-capital changes can make cash burn differ from net income.
Burn rate also changes. A hiring plan, product launch, delayed customer payment, or funding round can quickly make a simple runway estimate outdated.
The Bottom Line
Burn rate measures how fast a business uses cash. It is most useful when paired with runway, revenue progress, spending commitments, and a realistic financing or profitability plan.