Overview

Customer Retention Rate (CRR) refers to the percentage of customers a business retains over a specific period.

What is Customer retention rate?

Customer Retention Rate is a vital metric in measuring the success of your ecommerce business over time. It provides an estimation of how successful the business is at creating a long-term relationship with its customer base. The higher the retention rate, the more customers you have maintained loyalty with, which signifies that your business can retain its existing customers efficiently.

Formula

  • Customer Retention Rate (CRR) = [(E – N) / S] * 100
  • Where:
  • E is the number of customers at the end of the period
  • N is the number of new customers acquired during that period
  • S is the number of customers at the start of the period

Example

  • Suppose you start the month with 200 customers (S), gain 50 new customers (N), and end the month with 220 customers (E).
  • CRR = ((220-50)/200) x 100 = 85%
  • Hence, your Customer Retention Rate is 85%.

Why is CRR important?

The importance of the customer retention rate in eCommerce is enormous. Retaining an existing customer is less expensive than acquiring new ones, leading to a higher profit margin. High retention rates also indicate higher customer satisfaction, which leads to word-of-mouth referrals and consequently more prospects and sales. The customer retention rate also directly influences your customer lifetime value (CLTV) — a higher retention rate translates to higher CLTV.

Which factors impact CRR?

Several factors can impact the customer retention rate, the most notable being customer satisfaction. Others are product or service quality, pricing structure, customer service, brand reputation, and perception.

How can CRR be improved?

Improving the customer retention rate lies in excellent customer services, delivering high-quality products, creating effective loyalty programs, and personalizing customer experiences. Regular communication with customers through email newsletters, social media interaction, and personalized offers can also positively impact customer retention.

What is CRR’s relationship with other metrics?

Customer retention rate has a strong correlation with other eCommerce metrics like customer lifetime value (CLTV), churn rate, and repeat purchase rate. Higher customer retention rates lead to higher CLTV and repeat purchase rates but lower churn rates.

Free essential resources for success

  • The Incremental ROAS Playbook for BFCM 2023

    The Incremental ROAS Playbook for BFCM 2023

    Dive into a playbook that revolutionizes your BFCM campaign approach. Crafted with meticulous precision, it...

  • Enhance marketing mix modeling

    Data Sources Checklist for Marketing Mix Modeling

    Build a robust marketing mix model by identifying and organizing the right data sources.

  • MMM Implementation

    An Actionable Checklist for Marketing Mix Modeling

    Build and scale your marketing mix model with a structured, step-by-step implementation checklist.

Discover more from Lifesight

  • Academy Blog - Lifesight

    Published on: July 31, 2026

    We Rebuilt the Measurement Academy for the Future of Marketing

    The free, self-paced Foundations of Marketing Measurement course is designed for marketers who want to build modern measurement skills and earn certification.

  • BCG Cover

    Published on: July 31, 2026

    The Marketing Incrementality Gap: What BCG’s Research Reveals

    BCG research reveals 20% to 40% of marketing programs deliver no real lift. Calculate your true measurement gap today.

  • Engine Behind Our Forecasts

    Published on: July 30, 2026

    Introducing Horizon: Lifesight’s Open-Source Marketing Forecasting Engine

    Lifesight introduces Horizon, an open-source forecasting engine that enables teams to inspect, test, and improve the models behind marketing predictions and budget decisions.