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Customer Retention Rate Calculator

Customer Retention Rate isolates how many customers a business kept over a period, deliberately excluding new customers so growth from acquisition can't mask a retention problem.

Customer Retention Rate

93.0%

What This Means

New customers are excluded on purpose, so strong acquisition can't mask a retention problem in the existing base.

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The Formula

Customer Retention Rate = ((Customers at End of Period - New Customers Acquired) / Customers at Start of Period) × 100

Why It Matters

Because new customer acquisition is subtracted out, retention rate can't be inflated by a strong sales quarter the way a raw customer-count trend can. It's the direct mirror of churn rate, so the two are typically read together rather than in isolation.

Example

A company starts a quarter with 1,000 customers, ends with 1,050, and acquired 120 new customers along the way. Retention rate is ((1,050 minus 120) divided by 1,000) times 100, which equals 93%.

Frequently Asked Questions

  • They're complementary views of the same underlying data. Churn rate reports what was lost; retention rate reports what was kept, and the two typically sum to 100% when measured over the same period.

  • Without excluding them, strong new customer growth could mask a serious retention problem in the existing base, since the ending customer count alone doesn't reveal who left and who's new.

Related Calculators

Churn Rate Calculator

From the Glossary

Customer Retention RateChurn RateCohort Retention Rate
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