Career & Growth · Free tool

SaaS Churn Rate Calculator

Customer churn + gross MRR churn + net MRR churn. Net negative churn means you grow without new sales.

Updated April 2026

Customer churn inputs

Customers (start of month)Customers (end of month)New customers added

Revenue churn inputs

MRR start ($)MRR end ($)Expansion MRR ($)New-customer MRR ($)

Customer churn

12.00%

60 lost this month

Gross MRR churn

18.00%

$9,000 lost MRR

Net MRR churn

8.00%

Expansion not offsetting losses

Annual customer churn

78.43%

Critical

Annual MRR churn

90.76%

Critical

Annual churn tiers

< 5% — excellent (best-in-class SaaS)
5–10% — good (typical healthy SMB SaaS)
10–20% — concerning (retention work needed)
> 20% — critical (leaky bucket)

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What it does

Customer churn vs MRR churn vs net MRR churn — all three tell different stories. Net negative churn is the SaaS goal.

Runs entirely in your browser — no upload, no account, no watermark. For more tools in this category see the full tools index.

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Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.

<iframe src="https://freetoolarena.com/embed/saas-churn-rate-calculator" width="100%" height="720" frameborder="0" loading="lazy" title="SaaS Churn Rate Calculator" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>

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How to use it

Enter customer + MRR deltas.
Factor in expansion.
Read 3 churn rates.