How to calculate burn rate
There are two forms of burn rate. The first, gross burn rate, refers to the total amount of operating costs that a startup incurs in expenses each month. Gross burn rate is simply expressed as:
Total Monthly Operating Costs = Gross Burn Rate.
For example, if a company spends $5,000 on office space, $10,000 on software, and $15,000 on salaries and wages each month, then their monthly operating cost would be $30,000. Therefore, their gross burn rate would be $30,000.
The second form of burn rate is net burn rate. Net burn rate is the total amount of money that the startup loses each month. When calculating net burn rate, expenses and revenue are both taken into account. Net burn rate can be calculated by using:
(Monthly Revenue – Cost of Goods Sold) – Gross Burn Rate = Net Burn Rate
Let’s say that same company from before is generating a revenue of $20,000 a month with a cost of goods at $10,000 per month. Taking into account our gross burn rate of $30,000, we could generate their net burn rate by doing the following calculation:
($20,000 – $10,000) – $30,000 = -$20,000
Though the company is spending $30,000 a month, they’re only losing $20,000 a month thanks to their revenue. This can be an important distinction to make when calculating a startup’s runway. If this company had an investment of $100,000, and they were losing $20,000 a month, we can then say they have a runway of five months.
Generally, it’s recommended for startups to have 6-12 months of expenses on hand. Therefore, if your company has $100,000 in the bank, then a good burn rate would be between $16,667 (6 months runway) and $8,333 (12 months runway).