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SaaS Churn Rate Calculator for Customer Retention and Revenue Churn

Calculate monthly customer churn, customer retention, gross MRR churn, net revenue churn and annualized customer churn. Use one opening customer base and one opening MRR base so cancellations, downgrades and expansion are measured consistently.

Monthly SaaS Churn and Retention Inputs

Use one currency for every MRR input. Dollar symbols are display labels and do not convert exchange rates.

This calculator is designed for a monthly reporting period. Enter the customer count and recurring revenue that existed at the start of the same month, then record churn, contraction and expansion from that opening base.

Count active paying customers before the month's churn. Do not use ending customers as the denominator.
Count customers whose paid relationship ended. A downgrade without full cancellation belongs in contraction MRR, not customer churn.
Use normalized monthly recurring revenue from the customers who were already active at the start of the month.
Recurring revenue removed because opening-base customers fully cancelled.
Include recurring revenue lost when existing customers reduce seats, usage or plan value without fully churning.
Use upgrades, added seats or recurring usage growth from the opening customer base. Do not include new-customer MRR.
Monthly Customer Churn Rate-
Monthly Customer Retention Rate-
Gross Revenue Churn (MRR)-
Net Revenue Churn (MRR)-
Existing-Customer Ending MRR-
Annualized Customer Churn-
Annualized Customer Retention-
Retention Review Signal-

Example: Monthly SaaS Customer Cohort

Starting customers: 1,000

Customers churned: 40

Starting MRR: $100,000

Churned MRR: $5,000

Contraction MRR: $2,000

Expansion MRR: $8,000

Customer churn: 4.0%

Customer retention: 96.0%

Gross revenue churn: 7.0%

Net revenue churn: -1.0%

Existing-customer ending MRR: $101,000

Annualized customer churn: 38.7%

The annualized result compounds a constant monthly customer churn assumption. It is a comparison model, not a forecast of a real cohort.

SaaS Churn and Retention Formulas

Customer Churn Rate = Churned Customers / Starting Customers x 100Customer Retention Rate = 100% - Customer Churn RateGross Revenue Churn = (Churned MRR + Contraction MRR) / Starting MRR x 100Net Revenue Churn = (Churned MRR + Contraction MRR - Expansion MRR) / Starting MRR x 100Existing-Customer Ending MRR = Starting MRR - Churned MRR - Contraction MRR + Expansion MRRAnnualized Customer Retention = (1 - Monthly Customer Churn)^12Annualized Customer Churn = 1 - Annualized Customer Retention

Customer churn: Counts customers that fully leave the opening customer base.

Revenue churn: Measures recurring revenue lost from the same opening base.

Net churn: Expansion from existing customers can offset churn and contraction and can make net revenue churn negative.

How to Read a SaaS Churn Result

Compare like with like: Monthly churn should be compared with monthly churn for a similar ARR, ARPA, plan and customer segment.Do not treat 5% as universal: Current SaaS benchmark data varies materially by company scale and account value.Check gross and net revenue churn together: Expansion can hide underlying recurring revenue losses in the net metric.Separate new MRR: New customers belong in total MRR growth, not in existing-customer revenue churn.Use cohorts: A blended company average can hide weak onboarding cohorts or strong enterprise retention.

Current SaaS Benchmark Context

ChartMogul's current benchmark dataset covers more than 2,500 SaaS businesses. Median monthly customer churn is higher at smaller ARR and lower at larger ARR. For example, the median is about 6.5% below $300k ARR and about 3.1% in the $8M-$15M ARR range.

ARPA also matters. Current median monthly customer churn is about 6.1% below $25 ARPA and about 1.8% above $1,000 ARPA. Use these figures only as comparison context, not a target for every SaaS company.

ChartMogul customer churn methodology and benchmarks ChartMogul revenue churn methodology

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SaaS & Software
SaaS churn rate formulas, retention and benchmark guide
Learn how customer churn differs from revenue churn, why monthly churn must be annualized with compounding, how expansion affects net churn and how to compare SaaS churn benchmarks without treating one number as universal.
Read the complete guideBrowse all guides
SaaS Churn Rate Calculator Frequently Asked Questions
Use these answers to keep customer churn, customer retention and recurring revenue churn on consistent definitions.
Divide customers that fully churn during the month by paying customers active at the start of that month, then multiply by 100. This calculator uses the opening customer base so new customers acquired during the month do not change the denominator.
Customer churn counts lost accounts. Revenue churn measures recurring dollars lost from the opening customer base. Gross revenue churn includes cancellations and contractions, while net revenue churn also subtracts expansion from existing customers.
Yes. Net revenue churn is negative when expansion MRR from existing customers is greater than MRR lost to full churn and contraction. Negative net churn does not mean customer churn is zero, so review customer churn and gross revenue churn separately.
There is no single good churn rate for every SaaS company. Current benchmark data varies by ARR, ARPA, customer type and business maturity. Compare your monthly rate with similar companies and, more importantly, with your own cohorts and segments over time.
The customer base changes after each month's churn, so annualization should compound monthly retention. At 4% monthly churn, multiplying by 12 gives 48%, while compounding produces about 38.7% annualized churn under a constant-rate assumption.
Move between recurring revenue, retention, acquisition and lifetime economics without mixing their formulas.
 NRR Calculator - net and gross revenue retention  MRR Calculator - total monthly recurring revenue movement  SaaS LTV:CAC Calculator - connect customer churn with lifetime value  CAC Payback Calculator - compare acquisition recovery with retention  ARR Calculator - annualize recurring revenue run rate 
SaaS Churn Rate Calculator Disclaimer: This calculator provides simplified monthly churn and retention estimates for educational and planning use. Definitions can differ across billing platforms and accounting policies. The annualized output assumes the monthly customer churn rate remains constant for 12 months. The net revenue churn formula includes expansion MRR but does not separately model reactivation MRR, new-customer MRR, annual contract timing or cohort-specific retention curves. Reconcile definitions with your billing and finance source of truth before using results for forecasting, valuation or investment decisions.