SaaS metrics calculator
Your SaaS metrics, worked out.
Put in this month's numbers. The calculator works out ARR, runway, burn multiple, NRR, CAC and CAC payback right here in your browser, with the rule of thumb for what good looks like next to each.
What it works out
- ARR and net new ARR, from MRR (or ARR) and this month's new, expansion and churned MRR
- Runway: months of cash at this month's net burn
- Burn multiple: net burn for each dollar of net new ARR
- NRR estimate: what existing customers add or lose over a year, from this month's expansion and churn
- CAC: sales and marketing spend per new customer
- CAC payback: months for a new customer to earn back their CAC, on gross margin when you add it
What good looks like
- ARR is MRR times 12: the base every other ratio here is measured against.
- Rule of thumb: 18 months or more is comfortable; under 12 months, plan what happens next now.
- Rule of thumb: under 1 is excellent, under 1.5 is efficient, over 2 means growth is costing a lot of cash.
- Rule of thumb: over 100% means existing customers grow on their own; 110% or more is strong.
- Rule of thumb: CAC only means something next to what a customer pays you, so read it with CAC payback.
- Rule of thumb: under 12 months is strong, 12 to 18 is common, over 18 months is slow.
Rules of thumb are general SaaS benchmarks, not advice for your company. Every result is only as good as the books behind it.
Questions founders ask
How is the burn multiple worked out?
Net burn divided by net new ARR over the same period. Here that is this month's net burn over the ARR this month added (new MRR plus expansion, minus churn and contraction, times 12). If net new ARR is zero or negative, there is no burn multiple to show.
Why is NRR an estimate?
NRR is measured over a year of the same customers. From one month's numbers the calculator runs this month's expansion and churn for a year, without compounding. Twelve closed months of billing data give the real number.
What does CAC payback use?
CAC (sales and marketing spend divided by new customers) over what a new customer pays each month (new MRR divided by new customers). Add your gross margin and it uses gross profit per month, the stricter and more common version.
Where should these numbers come from?
From closed, reconciled books: net burn from the cash flow, MRR from billing that ties to revenue, sales and marketing spend from the P&L. Numbers pulled from the bank balance or a spreadsheet nobody has checked give ratios you can't defend.