Burn Rate

Updated
May 20, 2026

Burn Rate: How to Calculate It and What It Tells You

Burn rate is the speed at which a business spends cash, typically measured monthly. It is one of the most important numbers a founder can track because it directly determines how long a company can operate before running out of money.

Gross Burn Rate vs. Net Burn Rate

These two figures answer different questions.

Gross burn rate is the total cash spent in a given month before any revenue comes in.


FORMULA
Gross Burn Rate = Cash Expenditure/Number of months
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If your business spends $80,000 per month on payroll, software, office space, and other expenses, your gross burn rate is $80,000 per month.

Net burn rate subtracts revenue from that figure.


FORMULA
Net Burn Rate = Monthly Cash Spent - Monthly Revenue Received
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If the same business brings in $30,000 in monthly revenue, the net burn rate is $50,000. Net burn is typically the more useful number because it reflects the actual cash drain.

How to Use Burn Rate

The primary use of burn rate is calculating runway: how many months the business can operate before cash runs out.


FORMULA
Runway = Cash on Hand / Net Burn Rate
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With $500,000 in the bank and a net burn of $50,000 per month, the runway is 10 months. That is the decision window for fundraising, achieving profitability, or cutting costs.

Investors ask about burn rate in nearly every funding conversation. A well-controlled burn rate signals discipline. An unexplained spike signals risk.

What Drives Burn Rate Up

  • Payroll is typically the largest component. Adding headcount increases burn immediately.
  • Rent and infrastructure costs are fixed and predictable but significant.
  • Marketing and sales spend can scale quickly, especially in growth phases.
  • One-time events like legal fees, equipment purchases, or onboarding costs create temporary spikes.

What a Healthy Burn Rate Looks Like

There is no universal benchmark. A pre-revenue startup burning $100,000 per month may be entirely appropriate if it is in a capital-intensive product development phase. A revenue-generating business burning 5x its monthly revenue has a structural problem.

The right question is not whether burn is high or low. It is whether each dollar of burn is generating a predictable and measurable return.

Burn Multiple

A related metric is the burn multiple, which compares how much cash a company burns per dollar of net new ARR added.


FORMULA
Burn Multiple = Net Burn / Net New ARR
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A burn multiple below 1x is strong. Above 2x indicates the growth being purchased is expensive. Investors increasingly use this to evaluate capital efficiency.

Tracking Burn Rate Accurately

Burn rate calculations are only as accurate as the books underneath them. Uncategorized transactions, delayed reconciliation, and missed expense entries will all distort the number. A business making decisions on inaccurate burn data is making decisions on fiction.

Frequently Asked Questions About Burn Rate

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1. What is burn rate for a startup?

Burn rate is the speed at which a startup spends cash each month before it becomes profitable or raises additional funding. It tells you how long the business can operate before running out of money, assuming no new revenue or investment comes in.

2. What is the difference between gross burn rate and net burn rate?

Gross burn rate is total monthly cash expenditure before any revenue. Net burn rate subtracts monthly revenue from that figure. Net burn is the more relevant number for most businesses because it reflects the actual cash drain after revenue is factored in.

3. What is a good burn rate?

There is no universal answer. Burn rate is evaluated against two things: runway (how much cash is left) and efficiency (what the burn is producing). A burn multiple below 1x, meaning you are spending less than $1 to generate $1 of net new ARR, is considered strong. Burn that is growing faster than revenue is a structural concern at any level.

4. How do you calculate burn rate?

Net Burn Rate = Monthly Cash Spent minus Monthly Revenue Received. If your business spends $80,000 per month and brings in $30,000 in revenue, your net burn rate is $50,000 per month.

5. How do you extend runway without raising capital?

The most direct approaches are reducing discretionary spending, accelerating revenue collection by invoicing faster and following up on outstanding AR, pausing or renegotiating vendor contracts, and delaying non-critical hires. Extending payables terms with vendors also improves cash timing without reducing total costs.

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LayerNext surfaces burn rate automatically from your QuickBooks data, updated in real time.
No spreadsheet required. You see how much you are spending, across which categories, and how that tracks against prior months.
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