Gross burn rate

Gross burn rate is the total amount of cash a company spends each month to operate, before counting any revenue that comes in. It captures the full outflow of cash across payroll, rent, software, marketing, and every other operating cost in a given month. Because it ignores incoming revenue, gross burn shows the raw cost of keeping the business running.

It is usually read next to net burn rate, which subtracts revenue from that outflow to show how fast cash reserves are actually shrinking. Both feed into runway, the number of months a company can operate before its cash runs out. For a subscription business, revenue arrives on a recurring schedule, so clear billing and collections data make the revenue side of these calculations reliable. A subscription platform such as Recurly captures the recurring revenue and payment data that a finance team pairs with expense data to model burn and runway.

Why gross burn rate matters for subscription businesses

Gross burn rate is a plain measure of how expensive the company is to run, independent of how sales are going. That makes it useful for stress-testing: if revenue fell away, gross burn is what the business would still be spending, and cash divided by gross burn is the runway in that worst case. Founders and finance teams use it to size the cushion they need. For a subscription business, gross burn is most informative when read against recurring revenue and net burn together. Recurring revenue can cover a large share of monthly costs, so a high gross burn is not alarming on its own if revenue is close behind it. The gap between gross burn and revenue, which is net burn, is what determines how quickly reserves decline.

How gross burn rate works

Gross burn rate is measured over a month and reflects cash actually leaving the business:

• It includes all operating cash outflows, such as salaries, benefits, rent, software, marketing, and services.

• It excludes revenue entirely, which is the key difference from net burn.

• It is usually stated as an average monthly figure, often smoothed over a quarter to reduce the effect of lumpy payments. Reading gross burn alongside net burn and the current cash balance gives the full cash picture: what the business spends, what it keeps after revenue, and how long the reserves last at the current pace.

How to calculate gross burn rate

Gross burn rate is the sum of monthly operating cash outflows. Written as plain formulas: Gross burn rate = Total monthly operating cash expenses Net burn rate = Gross burn rate - Monthly revenue Runway (months) = Cash balance / Net burn rate To calculate gross burn rate for a month:

1. Add up every operating cash outflow for the month, including payroll, rent, software, marketing, and other operating costs.

2. Do not subtract revenue; gross burn is the full outflow.

3. To smooth out uneven months, average the total over a period such as a quarter.

4. To find net burn, subtract monthly revenue from gross burn.

5. To find runway, divide the current cash balance by net burn. Illustrative example (hypothetical numbers):

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• Monthly operating costs: 200,000 dollars in payroll, 30,000 dollars in rent and facilities, 20,000 dollars in software and services, and 50,000 dollars in marketing.

• Monthly recurring revenue collected: 150,000 dollars.

• Cash in the bank: 1,800,000 dollars. Gross burn rate is 200,000 plus 30,000 plus 20,000 plus 50,000, or 300,000 dollars per month. Net burn rate is 300,000 minus 150,000, or 150,000 dollars per month. Runway is 1,800,000 divided by 150,000, or 12 months at the current pace.

Benefits and examples

Tracking gross burn rate gives a subscription business several advantages:

• A clear worst-case view, since gross burn is what the company would spend even if revenue stopped.

• A basis for runway planning, when paired with net burn and the cash balance.

• A check on spending discipline, because rising gross burn shows cost growth regardless of revenue.

• Better fundraising conversations, since investors expect founders to know their burn and runway precisely. For example, a company raising a round can show that its 300,000 dollar gross burn is largely covered by recurring revenue, leaving a modest net burn and a long runway. Recurly provides the recurring revenue and collections data that make the revenue side of that story dependable.

Recurly provides a comprehensive suite of revenue and collections figures essential for cash-flow and runway modeling, primarily through its Revenue Recognition (RevRec) solution and advanced analytics capabilities. For revenue modeling, Recurly surfaces:

• Recognized revenue: The Recurly RevRec solution automates the process of recognizing revenue in compliance with ASC 606 and IFRS 15 standards. This means tracking revenue when it is earned, rather than just when it is collected, and providing detailed reports on recognized revenue, unearned revenue, and deferred revenue.

• Monthly recurring revenue (MRR): This key metric tracks predictable monthly revenue, including collected MRR, MRR in dunning, expected MRR (based on upcoming subscription bills), and the impact of discounts. It allows for detailed analysis by account, plan, or add-on.

• Annual recurring revenue (ARR): For long-term financial planning, Recurly calculates ARR, representing the expected recurring revenue over a year.

• Revenue forecasting: Recurly's RevRec improves revenue visibility and forecasting across various monetization models, currencies, and payment methods, enabling finance teams to account for contract modifications and accelerate financial close.

• Key performance indicators (KPIs): Recurly's analytics dashboards provide insights into various revenue-related KPIs, including Lifetime Value (LTV), Payback Period, Subscriber ROI, Average Revenue Per Customer (ARPC), Gross Margin Percentage, Customer Acquisition Cost (CAC), LTV:CAC, Trial Conversion Rate (TCR), New MRR, Expansion MRR, Reactivation MRR, Churn MRR, Contraction MRR, and Net MRR.

• Revenue waterfall Report: This report details revenue schedules, illustrating the distribution of revenue over various periods, including recognized revenue to date and future projections.

For collections figures and their impact on cash flow:

• Billings report: This report details the total amount of successful payments, refunds, and the net of these over a selected period, distinguishing between new and renewing customers.

• Revenue recovered: Recurly's churn management tools, including intelligent retries, dunning campaigns, and account updaters, are designed to recover failed payments and reduce involuntary churn. Metrics like Invoice Recovery Rate, Subscriptions Saved, and Revenue Recovered are tracked to show the effectiveness of these efforts.

• Cash flow synchronization: Recurly's upcoming Payment Sync feature will automate Accounts Receivable (AR) journal entries upon payment clearance, ensuring that cash flow and recognized revenue remain synchronized throughout the month.

Frequently asked questions

What is the difference between gross burn and net burn? Gross burn is total monthly operating spend before any revenue. Net burn subtracts revenue from that spend to show how fast cash reserves are actually declining. Gross burn shows the cost to operate; net burn shows the real cash impact.

How do you calculate runway from burn rate? Divide the current cash balance by the net burn rate. For example, 1,800,000 dollars in cash divided by 150,000 dollars of net burn per month is 12 months of runway.

Does gross burn rate include revenue? No. Gross burn deliberately excludes revenue so it reflects the full cost of operating. Once revenue is subtracted, the figure becomes net burn.

Why does gross burn rate matter for a subscription business? It shows the cost of running the company independent of sales, which is useful for stress-testing and planning. Read against recurring revenue and net burn, it helps a subscription business judge how much of its costs are covered and how long its cash will last.