Churn rate calculator.

Customer churn, revenue churn, and Net Revenue Retention — the three metrics that decide whether your SaaS scales or stalls. Free benchmarks and recommendations.

Why churn is the metric SaaS investors care about most.

Acquisition costs are visible. Churn is the silent killer. Reducing it is the single highest-leverage thing most SaaS teams can do.

  1. 01
    Churn caps your growth.High churn means you're filling a leaky bucket — every new customer goes to replacing one who left.
  2. 02
    Retention is 5–25× cheaper.Reducing churn 5% can lift profit 25–95%. Cheaper than acquiring more customers, every time.
  3. 03
    Net negative churn is the goal.NRR > 100% means existing customers grow faster than churn shrinks them — the SaaS holy grail.
  4. 04
    Investors live here.NRR is one of the first three metrics a SaaS investor looks at. A 110%+ number unlocks rooms 90% can't walk into.

Calculate your churn.

Benchmarks differ for monthly vs. annual reporting.

Customers at the start of the period.

Cancellations during the period.

Total MRR at the start of the period.

Revenue lost from cancelled customers.

Upsells, upgrades, cross-sells. Needed for NRR.

Revenue lost to downgrades.

The three churn metrics that matter.

  1. 01
    Customer churn rate.Customers lost ÷ starting customers. Count-based, ignores how much each customer was worth.
  2. 02
    Revenue churn rate.Churned MRR ÷ starting MRR. Tells you whether you're losing dollars, not just logos.
  3. 03
    Net revenue retention (NRR).((Starting MRR + expansion − contraction − churned) ÷ starting MRR) × 100. The most important retention metric.

What each one tells you.

Customer churnPercentage of customers who cancelled during the period
Revenue churnPercentage of revenue lost from cancellations
NRRRevenue retention after accounting for expansion, contraction, and churn

The compounding impact of churn.

Small churn, big numbers.

With 1,000 customers and 5% monthly churn, you lose 50 every month — and need 50 new ones just to stand still. At 10%, you need 100 every month before any growth shows up.

Monthly churn 2%Lose 24% of customers/year
Monthly churn 5%Lose 46% of customers/year
Monthly churn 10%Lose 72% of customers/year

More SaaS calculators.

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  3. CAC calculator

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High churn often points to a product or UX problem.

Slow load times, confusing flows, and missing features all show up as churn. I build SaaS frontends and web applications in Next.js and TypeScript that users actually want to come back to.

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Built by Taro Schenker — full-stack developer who works with startups and local businesses.