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Customer Retention Rate Calculator

Calculate retention rate, churn rate, and revenue impact to improve customer loyalty and reduce customer attrition.
Decision Context
Page-specific guidance for using this result in a real planning decision.

This calculator is built to show how much of your customer base stays with you over a defined period, giving a cleaner view of relationship durability.

Use it for recurring-revenue businesses, cohort reviews, account management reporting, or any situation where repeat behavior matters more than one-time volume.

Retention rate is strongest when compared across equal periods and segments, because a single average can hide whether specific cohorts are improving or deteriorating.

Calculator
Enter your values

Customers still active at period end

Analysis
Interpretation of the current calculator output

Enter values to see detailed analysis and insights.

How to Use

Step-by-step instructions
  1. 1Enter total customers at the start of the period
  2. 2Input number of customers retained at period end
  3. 3Add average revenue per customer
  4. 4Review retention rate and revenue impact
  5. 5Target: 85%+ retention for SaaS, 70%+ for e-commerce

Retention & Churn Formulas

Retention rate measures the percentage of customers who continue using your product/service. Higher retention means better customer satisfaction and lower acquisition costs.
Retention Rate = (Retained Customers ÷ Total Customers) × 100% Churn Rate = 100% - Retention Rate

Variables:

Retention Rate% of customers retained
Churn Rate% of customers lost
Total CustomersCustomers at period start
Retained CustomersCustomers at period end

Example

SaaS Retention Example

Inputs:

Total Customers:1,000 customers
Retained Customers:850 customers
Average Revenue:$100/month/customer

Steps:

  1. 1.Retention Rate = (850 ÷ 1,000) × 100 = 85%
  2. 2.Churn Rate = 100% - 85% = 15%
  3. 3.Lost Customers = 1,000 - 850 = 150
  4. 4.Revenue Impact = 150 × $100 = $15,000/month lost
  5. 5.Annual impact = $15,000 × 12 = $180,000
Result:
85% retention with $180k annual revenue loss from churn

Frequently Asked Questions

What's a good retention rate?

SaaS: 85-95%. E-commerce: 70-80%. Subscription boxes: 70-85%. B2B: 90-95%. Mobile apps: 20-40% (30 days). Higher is always better - retention compounds over time.

How do I improve retention?

Onboard effectively, provide excellent support, add value regularly, build community, reward loyalty, identify at-risk customers early, address pain points, and continuously improve product-market fit.

Is retention more important than acquisition?

Yes! 5× cheaper to retain than acquire. Retained customers buy 67% more than new ones. 5% retention improvement can increase profits 25-95%. Focus on retention first.