SaaS MRR/ARR Calculator
Monthly and annual recurring revenue, plus a 12-month churn projection.
🔒 Runs entirely in your browser — nothing here is ever uploaded
About the SaaS MRR/ARR Calculator
Computes Monthly Recurring Revenue (MRR) and Annual Recurring Revenue (ARR) from subscriber count and average revenue per user, then optionally projects MRR forward 12 months under a chosen monthly churn rate and new-MRR growth rate.
- Enter your active subscriber count and average revenue per subscriber (ARPU) per month.
- Read MRR and ARR in the result panel.
- Optionally enter a monthly churn rate and new MRR added per month to see a 12-month projection.
500 active subscribers at $49/month ARPU gives $24,500 MRR and $294,000 ARR. Projected forward 12 months at 3% monthly churn with no new MRR added: MRR compounds down to roughly $16,996 (about −30.6%).
The 12-month projection applies one blended monthly churn rate against the entire MRR balance, plus a flat new-MRR add each month — a simplified stand-in for the fuller 'new + expansion − contraction − churned' cohort model. MRR and ARR count only recurring subscription revenue, excluding one-time fees, by standard SaaS-metrics convention — and ARR here is simply MRR × 12, not a literal annual-contract-value figure.
- • Even a 'small' 3-5% monthly churn rate compounds to 30-50%+ annual revenue loss if unreplaced.
- • ARR is a normalized run-rate figure (MRR × 12), not the same as total annual bookings or contract value.
- • Adding a realistic 'new MRR per month' figure is what actually offsets churn — a projection with churn but zero new MRR always trends toward zero.
- Stripe — MRR and ARR: definitions, formulas, and why they matter for SaaS — accessed 2026-08-30
Illustrative estimate only, not financial or tax advice. Verify figures with a licensed adviser or your local tax authority.