Burn Rate Explained

Burn rate is the rate at which your company spends money. It is the most fundamental measure of how fast your startup is consuming cash, and understanding it deeply is essential for survival. Every successful startup founder must be able to explain their burn rate in their sleep—not just the number, but what drives it and how it connects to their strategic decisions.

The concept is simple: burn rate measures cash outflow. But the nuance comes from understanding that there are two ways to measure it, each telling a different story about your company. Using the wrong measure can lead to dangerous miscalculations about your runway and your fundraising strategy.

Investors pay close attention to burn rate because it tells them how efficiently you are using capital, how fast you will need to raise again, and how much runway you have to execute on your plan. A startup with $2 million in the bank burning 100,000 per month has 20 months of runway. That same company burning $250,000 per month has only 8 months. The difference is existential.

Gross burn rate is your total monthly expenses regardless of any revenue you might be generating. It is the raw cost of keeping your business running—the sum of all salaries, rent, software, marketing, and every other expense.

How to Calculate Gross Burn:
Add up all cash expenses for the month. This includes payroll (salaries, benefits, payroll taxes), office space and utilities, software subscriptions and tools, marketing and advertising, professional services (legal, accounting), travel and entertainment, and all other operating expenses. Do not subtract revenue. This is your gross burn.

When Gross Burn Matters:
Gross burn is critical for understanding your cost structure and planning for worst-case scenarios. If your revenue suddenly dropped to zero, your gross burn is how fast you would burn through cash. Investors use gross burn to understand the minimum you need to operate and to evaluate your cost efficiency compared to similar companies.

Example: Your startup spends $80,000 on salaries, $10,000 on rent and utilities, $5,000 on software, $15,000 on marketing, and $5,000 on miscellaneous expenses. Your gross burn is $115,000 per month.

Net burn rate is your gross burn minus your monthly revenue. This is your actual cash consumption—the net amount of cash leaving your bank account each month. Net burn is the number you should use for most runway calculations because it reflects your actual position.

How to Calculate Net Burn:
Take your gross burn and subtract your monthly revenue (product sales, service revenue, subscription revenue, etc.). The result is your net burn. If you generate more revenue than expenses, you have negative net burn—you are cash flow positive.

Why Net Burn Is Usually More Important:
For runway calculations, net burn gives you a more accurate picture. If you have $1 million in the bank and a 100,000 net burn, you have 10 months of runway. Using gross burn would give you 8.7 months—a significant difference that could affect your planning.

Example: Using the $115,000 gross burn from above, if you generate $40,000 in monthly revenue, your net burn is $75,000 per month ($115,000 - $40,000 = $75,000). Your runway is $1,000,000 divided by $75,000 = 13.3 months.

Understanding what is typical for your stage helps you evaluate whether your burn rate is reasonable. These benchmarks vary significantly by industry, location, and business model, but they provide useful reference points.

Pre-Seed Stage: $30,000-$80,000 per month
At this stage, you typically have a small team of 3-10 people, often founders plus early employees. Most spending goes to product development and minimal operations. Many pre-seed companies are still in the customer discovery phase and may have minimal revenue.

Seed Stage: $50,000-$150,000 per month
Seed-stage companies typically have 5-15 employees and are validating product-market fit. Burn varies widely based on location (San Francisco startups burn more than remote-first companies) and business model (SaaS vs. marketplace vs. hardware).

Series A: $150,000-$400,000 per month
Series A companies typically have 15-50 employees and are scaling proven metrics. The focus shifts from validation to growth, and burn increases accordingly. Many Series A companies are generating significant revenue but still burning cash to fuel growth.

Series B and Beyond: $400,000-$1,000,000+ per month
Later-stage companies have larger teams and more complex operations. Burn continues to increase as they scale, though the ratio of revenue to burn should be improving.

When investors evaluate your startup, burn rate tells them critical information about your efficiency, your runway, and your fundraising timeline. Here is what they are looking for:

Efficiency: How much capital do you need to generate $1 of revenue? A company burning $500,000 to generate 100,000 in monthly revenue has a 5:1 ratio—a difficult position. A company burning $200,000 to generate 100,000 in monthly revenue has a 2:1 ratio—much healthier.

Runway: At your current burn rate, how long until you need more capital? Investors want to fund companies with sufficient runway to hit meaningful milestones before needing the next round.

Growth Efficiency: Are you getting more efficient as you scale? If your burn is increasing faster than your revenue, you are becoming less efficient. If revenue is growing faster than burn, you are improving unit economics.

Milestone Coverage: How many months of runway per milestone dollar? Investors want to fund companies that can achieve specific milestones—user growth, revenue targets, product launches—before needing more money.

Managing burn rate is an ongoing process. Here are proven strategies to keep your burn rate healthy without sacrificing growth:

Audit Your Software Stack: Most startups use 30-50% more software than they need. Review your subscriptions quarterly and cancel what you are not actively using.

Negotiate Vendor Contracts: Software vendors, cloud providers, and service companies often have flexibility. A 20% discount on a $5,000/month cloud bill saves $12,000 per year.

Defer Hiring Without Impact: Not every role needs to be filled immediately. Every month you defer a $15,000/month hire saves that much burn.

Consider Remote-First: Office space in major tech hubs costs $1,000-$2,000 per employee per month. Remote-first companies redirect this to growth.

Automate Where Possible: Automated tools often cost less than the employee time they replace. Evaluate high-volume processes for automation opportunities.