SaaS finance works best when recurring revenue, retention, acquisition efficiency, and cash discipline are reviewed together. This hub groups the calculators CalcMastery operators use to turn subscription data into decisions: what is growing, what is retaining, what costs too much to acquire, and whether growth is creating enterprise value.
Start with revenue base and movement, then move into retention, unit economics, and efficiency benchmarks. For definitions, pair the calculators with ARR, net revenue retention, gross revenue retention, and Rule of 40.
Core SaaS calculators
- Monthly Recurring Revenue (MRR) Calculator - Normalize current monthly subscription revenue and connect it to expansion, contraction, and churn.
- Annual Recurring Revenue (ARR) Calculator - Annualize recurring revenue for board reporting, forecasts, and SaaS valuation conversations.
- MRR & ARR Level Calculator - Convert between MRR and ARR when reviewing bookings, revenue run-rate, and plan targets.
- Gross Net New ARR Calculator - Separate new ARR, expansion, contraction, and churn so growth quality is visible.
- ARR Growth Rate Calculator - Track year-over-year or period-over-period recurring revenue momentum.
Retention and revenue quality
- Net Revenue Retention (NRR) Calculator - Measure whether expansion offsets churn and contraction in the existing customer base.
- Gross Revenue Retention Calculator - Isolate logo and downgrade pressure before expansion hides the problem.
- Revenue Churn Rate Calculator - Quantify recurring revenue lost from cancellations before new sales are added back.
- Net MRR Churn Rate Calculator - Review churn after expansion and contraction to see the true customer-base drag.
Unit economics and acquisition efficiency
- LTV Calculator - Estimate lifetime value using monetization, margin, and retention assumptions.
- LTV:CAC Ratio Calculator - Compare customer value against acquisition cost before scaling spend.
- CAC Calculator - Capture the true sales and marketing cost to acquire customers.
- CAC Payback Period Calculator - Estimate how many months it takes gross profit to recover acquisition spend.
- CAC Payback with Gross Margin Adjustment - Adjust payback for delivery costs so the result reflects contribution quality.
Efficiency workflows
- Growth quality review: Use ARR growth, NRR, and ARR growth benchmarks to separate market momentum from customer-base durability.
- Spend scaling review: Combine LTV:CAC, CAC payback, and CAC payback benchmarks before raising budget.
- Board dashboard review: Pair Rule of 40, SaaS quick ratio, burn multiple, and cash runway to balance growth with capital efficiency.
Benchmarks to use next
After calculating the metric, compare it with SaaS NRR benchmarks, GRR benchmarks, Rule of 40 benchmarks, revenue per employee benchmarks, and CAC payback benchmarks.