In the world of business, running out of great ideas will stall your growth. Running out of talented employees will frustrate your managers. But running out of cash will immediately, permanently, and irrevocably kill your company.
For startups, newly launched small businesses, and companies going through a period of heavy investment, profitability is often a distant dream. During these phases, the business is operating in the red, surviving entirely on the money sitting in its bank account—whether that money came from venture capital investors, a small business loan, or the founder's personal savings.
To survive this phase, founders must act like pilots monitoring their fuel gauge. They need to know exactly how fast they are burning through their cash, and exactly how many months they have left before the engine dies.
If you want to keep your company alive long enough to reach profitability, you must understand what is burn rate and how to calculate it.
This comprehensive guide will break down the crucial difference between gross and net burn rate, walk you through the math required to calculate your cash runway, and provide actionable strategies to slow your spending without suffocating your company's growth.
What is Burn Rate?
At its core, burn rate is a financial metric that measures the speed at which a company consumes its cash reserves before generating a positive cash flow.
It is typically measured on a monthly basis. If a company has a burn rate of $50,000, it means the business is losing $50,000 in cash every single month.
The term "burn rate" became famous during the dot-com boom to describe heavily funded software startups that were intentionally losing massive amounts of money to acquire users as quickly as possible. However, burn rate is not just a metric for Silicon Valley tech companies. It applies to any business that is currently spending more money than it brings in.
- A new restaurant spending $15,000 a month on rent and staff before opening its doors has a burn rate.
- A freelance designer taking a 3-month sabbatical to build a new portfolio website using their savings has a burn rate.
The Two Types of Burn Rate: Gross vs. Net
When a founder is asked about their burn rate, they must clarify which metric they are referring to, because confusing the two can lead to catastrophic financial planning. There are two distinct types of burn rate: Gross and Net.
1. Gross Burn Rate
Gross Burn Rate is simply the total amount of money your company spends in a single month to keep the doors open. It looks only at your expenses. It completely ignores any revenue your company might be making.
Gross burn rate tells you the absolute maximum baseline cost of operating your business.
2. Net Burn Rate
Net Burn Rate is the amount of cash your company is actually losing each month after you factor in the revenue you are bringing in.
Net burn rate is the far more important metric of the two. It is the true indicator of how fast your bank account is shrinking. When investors or accountants ask for your "burn rate," they are almost always referring to your Net Burn.
How to Calculate Gross Burn Rate
Calculating your gross burn rate is an exercise in aggregating all of your monthly operating expenses.
The Gross Burn Rate Formula: Total Monthly Operating Expenses = Gross Burn Rate
To get an accurate number, you must add up every single cash outflow. This includes:
- Cost of Goods Sold (COGS): The raw materials, wholesale products, and inbound freight required to make your product.
- Payroll: Salaries, wages, payroll taxes, health insurance, and benefits for all employees and founders.
- Rent & Utilities: Office space, warehouse leases, electricity, internet.
- Marketing & Sales: Facebook ads, Google Ads, agency retainers, conference tickets.
- Software & Tech: AWS hosting, SaaS subscriptions (CRM, accounting software, email marketing tools).
- Professional Services: Lawyers, accountants, consultants.
Worked Example: Calculating Gross Burn
Let's look at a new software startup. In the month of October, the founders aggregate their bank statements and find the following outflows:
- Server Hosting (AWS): $2,000
- Employee Payroll: $30,000
- Office Rent: $5,000
- Marketing Campaigns: $8,000
- Legal/Accounting Fees: $1,000
Calculation: $2,000 + $30,000 + $5,000 + $8,000 + $1,000 = $46,000 Gross Burn Rate.
This company requires exactly $46,000 in cash to operate for one month.
How to Calculate Net Burn Rate
Net burn rate takes your gross expenses and offsets them with your incoming cash.
The Net Burn Rate Formula: Total Monthly Revenue - Gross Burn Rate = Net Burn Rate
*(Note: To automate this math and see a visual breakdown of your expenses, use our free Burn Rate Calculator. If the result is a positive number, you do not have a burn rate—you have positive cash flow).*
Worked Example: Calculating Net Burn
Let's continue with the software startup from the previous example. We know their Gross Burn Rate is $46,000. However, the startup is not completely pre-revenue. They currently have 200 paying customers generating a total of $16,000 in monthly recurring revenue (MRR).
Calculation: $16,000 (Revenue) - $46,000 (Gross Burn) = -$30,000 Net Burn Rate.
While it costs the company $46,000 to operate, their actual bank account balance is only decreasing by $30,000 each month because their customers are subsidizing the rest of the cost.
The Ticking Clock: How to Calculate Cash Runway
Burn rate on its own is just a speed. It tells you how fast you are driving. What you really need to know is how far you can drive before you run out of gas. This metric is called your Cash Runway.
Cash runway tells you exactly how many months your company can survive before its bank account hits zero.
The Cash Runway Formula: Total Cash Reserves / Net Burn Rate = Months of Runway
Worked Example: Calculating Runway
The software startup has a Net Burn Rate of $30,000 per month. Following a recent seed funding round, they currently have $450,000 sitting in their corporate checking account.
Calculation: $450,000 / $30,000 = 15 Months of Runway.
If this startup does not increase its revenue, and does not decrease its expenses, they will go completely bankrupt in exactly 15 months. This puts a massive, ticking clock on the founders. They have 15 months to either figure out how to become profitable, or raise another round of venture capital.
What is a "Good" Burn Rate?
Entrepreneurs often obsess over finding the perfect benchmark for their burn rate. Unfortunately, there is no universal "good" number. A $100,000/month burn rate might be reckless for a bootstrapped local bakery, but it might be considered far too conservative for a venture-backed artificial intelligence company trying to capture a global market.
Instead of looking for a "good" burn rate, you should aim for a healthy runway.
The Gold Standard: 12 to 18 Months
In the startup and venture capital world, the general consensus is that a company should always maintain between 12 and 18 months of cash runway.
Why 18 months? Because raising venture capital or securing business loans takes a massive amount of time. If you realize you need money when you only have 3 months of runway left, you are operating from a place of extreme desperation. Investors will smell the desperation, and they will either refuse to invest or they will force you to accept terrible, predatory terms.
If you have 18 months of runway, you have the financial breathing room to spend 12 months building the product and growing revenue, and 6 months pitching investors from a position of strength.
The Danger of "Burning to Build" vs. "Burning to Grow"
If you are operating with a high burn rate, you must be ruthlessly honest about why you are losing money.
- Burning to Build: If you are spending $50,000 a month to pay engineers to build a complex software product that isn't finished yet, this is necessary. You are building the core asset.
- Burning to Grow: If the product is finished, and you are losing $50,000 a month on Facebook ads to aggressively acquire customers because the lifetime value of those customers is extremely high, this is a calculated, intelligent risk.
- Burning to Bleed: If you are losing $50,000 a month because you leased a massive, beautiful office space, bought everyone ergonomic chairs, and hired a bloated management team before you achieved product-market fit, you are bleeding cash for ego. This will destroy your company.
5 Strategies to Reduce Your Burn Rate and Extend Runway
If you run your runway calculation and realize you only have 5 months of cash left, you must immediately implement survival mode. To extend your runway, you have to decrease your Net Burn. You can do this by aggressively cutting expenses, increasing revenue, or both.
Here is a checklist of the fastest ways to reduce your burn rate:
1. Audit and Eradicate Software Bloat (SaaS Sprawl)
The modern small business is drowning in software subscriptions. $20/month here, $99/month there. It adds up to thousands of dollars a year. Review your corporate credit card statement line-by-line. Cancel any tool that your team has not logged into in the past 30 days. Downgrade premium tiers to free tiers where possible.
2. Pivot from Full-Time Hires to Contractors
Payroll is almost always the largest contributor to gross burn rate. Full-time W-2 employees are incredibly expensive; you pay their salary, payroll taxes, health insurance, and equipment costs. If you need specialized help (like a graphic designer or a copywriter), hire freelancers on a project-by-project basis. You only pay them when there is actual work to be done, turning a fixed monthly expense into a flexible variable expense.
3. Sublease Unused Office Space
Since the rise of remote work, many startups are locked into expensive commercial leases they no longer need. If you have a 5,000-square-foot office but your team only uses half of it, sublease the remaining desks to other freelancers or small startups to offset your rent expense.
4. Halt Non-Essential Capital Expenditures (CapEx)
If it doesn't directly contribute to generating revenue this month, do not buy it. Your team does not need new MacBooks if their current laptops work fine. You do not need to fly to a networking conference if you can take the meetings via Zoom. Conserve cash at all costs.
5. Shift Focus from Acquisition to Retention (Increase Revenue)
The best way to lower your Net Burn is to increase your revenue. However, acquiring brand-new customers is expensive and slow. It requires marketing budgets and lengthy sales cycles. Instead, focus entirely on your existing customers. Upsell them, offer them annual plans at a slight discount (to get the cash upfront), and provide elite customer service to ensure they don't cancel.
Final Thoughts on Managing Burn Rate
Understanding what is burn rate and how to calculate it is the fundamental difference between a visionary entrepreneur who builds a lasting empire and a dreamer who runs out of cash in six months.
Do not hide from the math. Many founders are terrified to look at their bank accounts because they know the numbers are bad. But ignoring your burn rate will not stop the cash from disappearing.
Calculate your Gross Burn, your Net Burn, and your Runway on the first day of every single month. By keeping your eyes locked on the fuel gauge, you give yourself the power to make aggressive course corrections, extend your runway, and ensure your business survives long enough to thrive.
(Need to run these numbers instantly? Plug your expenses into our Burn Rate Calculator to find your runway, and use the Break-Even Calculator to map out your path to profitability).
