SaaS Churn Calculator

What is Churn?

Churn quantifies how many customers or how much recurring revenue you lose in a period. This calculator outputs logo churn, gross revenue churn, and net revenue churn so expansion does not hide customer loss.

Formula

Version v1. See methodology and the public formula repo for sources and change history.

Worked example

Using the default example inputs (Starting customers: 200; Churned customers: 12; Starting MRR: $100,000; Churned MRR: $7,000; Contraction MRR: $3,000; Expansion MRR: $12,000), Churn equals 6% (Logo churn). Read logo churn beside revenue churn so expansion does not hide customer loss.

What good looks like

Benchmarks vary by segment and ACV. Compare logo and revenue churn together; high logo churn with stable revenue can mean you are losing smaller accounts only.

Directional guidance only, not a cohort benchmark claim. Premium cohort bands appear when sample thresholds are met for your profile.

FAQ

What is Churn?

Churn quantifies how many customers or how much recurring revenue you lose in a period. This calculator outputs logo churn, gross revenue churn, and net revenue churn so expansion does not hide customer loss.

What is the Churn formula?

Logo churn = Churned customers / Starting customers; gross revenue churn = lost MRR / starting MRR

Logo churn vs revenue churn?

Logo churn counts customers; revenue churn counts MRR or ARR dollars. They diverge when you lose small accounts but expand large ones.

What is net revenue churn?

Churn plus contraction minus expansion, as a share of starting MRR. Negative net churn means expansion outweighed losses.

Monthly vs annual churn?

Be explicit in reporting. This page accepts the period you choose; keep numerators and denominators aligned.