Burn Rate & Runway FAQ
Everything founders need to know about burn rate, runway, burn multiple, and managing startup cash flow.
What is burn rate?
Burn rate is the speed at which a startup spends its cash reserves, typically measured on a monthly basis. It tells founders and investors how quickly capital is being consumed before the company reaches profitability. Tracking burn rate is essential for planning runway and fundraising timelines. Use a burn rate calculator to find yours instantly.
What is the difference between gross and net burn rate?
Gross burn rate is your total monthly operating expenses, regardless of revenue. Net burn rate subtracts monthly revenue from expenses, showing actual cash consumption. For example, if you spend $100,000/month and earn $40,000, your gross burn is $100,000 and net burn is $60,000. The burn rate calculator computes both automatically.
How do you calculate burn rate?
Gross Burn Rate equals total monthly operating expenses. Net Burn Rate equals monthly expenses minus monthly revenue. Take your total cash spent over a period and divide by the number of months. For accuracy, use at least three months of data to smooth out one-time costs. Try the free burn rate calculator for instant results.
What is a good burn rate for a startup?
A good burn rate depends on your stage and available capital. The goal is to maintain 18-24 months of runway. Early-stage startups often burn more relative to revenue while building product. The key metric is burn multiple — net burn divided by net new ARR — which should ideally stay below 2x. See startup runway benchmarks for stage-specific data.
What is runway?
Runway is the number of months your startup can continue operating before running out of cash. It is calculated by dividing your current cash balance by your monthly net burn rate. Most advisors recommend maintaining at least 18-24 months of runway. Calculate yours with the startup runway calculator.
How do you calculate runway?
Runway equals Cash Balance divided by Net Burn Rate. For example, with $1 million in the bank and $100,000 monthly net burn, your runway is 10 months. For a more accurate figure, account for expected revenue growth and seasonal expense variations. The runway calculator handles these projections for you.
How many months of runway should a startup have?
Most investors and advisors recommend 18-24 months of runway. This gives enough time to hit milestones and raise the next round. Start fundraising when you have 6-9 months left — raising takes 3-6 months on average. See runway benchmarks by stage and check your own with the runway calculator.
What is burn multiple?
Burn multiple measures capital efficiency by dividing net burn by net new ARR. A burn multiple of 1.5x means you spend $1.50 for every $1 of new annual recurring revenue. It helps investors compare how efficiently startups convert cash into growth. Learn more in the burn multiple definition.
What is a good burn multiple?
A burn multiple under 1x is considered excellent — you are generating more new ARR than you burn. Between 1-2x is good, 2-3x is acceptable for early-stage companies, and above 3x signals inefficiency. As you scale past Series A, investors expect it to trend toward 1x. Track yours using a burn rate calculator.
When should I be worried about my burn rate?
Be concerned when runway drops below 12 months, when burn increases without corresponding growth, when burn multiple exceeds 3x, or when market conditions make fundraising difficult. Address burn rate issues early — cutting costs at 6 months runway is often too late. Use culta.ai's burn rate calculator to monitor trends.
How can I reduce my burn rate?
Reduce burn by cutting non-essential subscriptions, renegotiating vendor contracts, slowing hiring, delaying capital expenditures, increasing pricing, and focusing on profitable customer segments. Prioritize cuts that least impact growth. Read the complete guide to SaaS burn rate for a detailed framework.
What is the average burn rate for a seed-stage startup?
Seed-stage startups typically burn $50,000-$150,000 per month, depending on team size and location. A solo founder or small team in a low-cost area might burn $20,000-$50,000, while a well-funded seed with 5-10 employees in a major city can burn $100,000-$200,000 monthly. See seed-stage runway benchmarks for current data.
How does burn rate affect fundraising?
Investors evaluate burn rate to assess capital efficiency. High burn without proportional growth is a red flag. Most VCs want 18-24 months runway post-investment. Efficient burn can lead to better valuations. Start fundraising with 6-9 months runway. Check your readiness with the fundraising readiness calculator.
What is zero cash date?
Zero cash date is the projected calendar date when your startup will run out of money, based on current burn rate and cash balance. Unlike runway (measured in months), zero cash date gives a concrete deadline. It is the most urgent metric for cash-strapped startups. The runway calculator shows your projected zero cash date.
Should I include founder salaries in burn rate?
Yes. Founder salaries are a real operating expense and should always be included in burn rate calculations. Even if founders take below-market salaries now, investors will expect market-rate compensation eventually. Including them gives a more honest picture of true costs. Use the employee cost calculator to estimate total compensation costs.
How often should I review my burn rate?
Review burn rate monthly at minimum. Many founders check it weekly when runway is under 12 months. Monthly reviews should compare actual vs projected burn, identify expense trends, and update runway projections. Read about building a financial dashboard for investors to standardize your review process.
What is the difference between burn rate and runway?
Burn rate is how much cash you spend per month (a rate). Runway is how many months of operation you have left (a duration). They are inversely related: higher burn rate means shorter runway. Burn rate is the input; runway is the output. Calculate both with the burn rate calculator.
How do investors evaluate burn rate?
Investors look at burn rate in context: burn multiple (efficiency), runway remaining, revenue growth trajectory, and how burn aligns with milestones. They compare your burn to stage-appropriate benchmarks. Efficient burn with clear ROI is positive; high burn with flat growth is a dealbreaker. Read about financial projections for investors.
Calculate your burn rate now
Use the free burn rate calculator to find your gross burn, net burn, and runway in seconds.