Calculate MRR, ARR, churned MRR, and project subscription revenue over 12 months. Built for SaaS founders and growth teams.
Monthly fee charged per subscriber
Number of currently paying subscribers
Percentage of subscribers who cancel each month
Enter your subscription price, active subscribers, and monthly churn rate to calculate MRR, ARR, and projections.
This calculator gives SaaS founders, growth teams, and investors a fast, accurate view of subscription revenue health. Enter your subscription price, active subscriber count, and monthly churn rate to instantly see MRR, ARR, churned MRR, and a 12-month churn projection.
MRR = Subscription Price × Active Subscribers
ARR = MRR × 12
Churned MRR = MRR × (Churn Rate ÷ 100)
Net MRR = MRR − Churned MRR
Projected MRR (month n) = MRR × (1 − Churn Rate)ⁿ
Even a seemingly small monthly churn rate erodes revenue significantly over time. A 5% monthly churn rate leaves you with only 54% of your current MRR after 12 months — without acquiring a single new customer. The churn projection table in the calculator makes this curve visible so you can set meaningful retention targets.
The 12-month projection models churn erosion only — it assumes zero new subscriber growth. This gives you the baseline floor: the minimum new MRR you must add each month to maintain flat revenue. Layer your new subscriber growth on top to model expansion scenarios.
These calculations are for planning and estimation purposes only. Actual revenue depends on pricing tiers, expansion MRR, downgrades, payment failures, and market conditions. This tool does not constitute financial or investment advice.
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Monthly Recurring Revenue (MRR) is the predictable revenue a SaaS business earns each month from active subscriptions. It is the core health metric for subscription businesses because it reflects current run rate and enables accurate forecasting.
Annual Recurring Revenue (ARR) is simply MRR × 12. It normalizes your monthly revenue into an annual figure, which is the standard metric used for investor reporting, valuations, and enterprise sales benchmarks.
Churned MRR is the revenue lost each month due to cancellations or downgrades. It is calculated as MRR × (Monthly Churn Rate ÷ 100). For example, a 5% churn rate on €10,000 MRR means you lose €500 per month from your existing subscriber base.
For B2B SaaS, a monthly churn rate below 2% is considered healthy. Consumer SaaS typically sees higher churn (3–8%). Annual churn below 10–15% is the benchmark most investors look for. Lower churn compounds dramatically over time.
The projection applies compound churn each month: Projected MRR = Current MRR × (1 − Churn Rate)^n, where n is the number of months ahead. This assumes no new subscriber growth — it shows the worst case of pure churn erosion on your current base.
This calculator isolates the churn effect on your existing MRR base. It helps you understand how much new MRR you need to acquire each month just to maintain flat revenue. Add your expected new MRR on top of the projected values for a growth-adjusted forecast.
Net MRR is MRR after subtracting Churned MRR. It represents the revenue retained from your current subscriber base. Tracking Net MRR over time shows whether your retention is improving or degrading.