# Customer Churn & Retention Calculator Calculate customer churn rate, retention rate, revenue churn rate, and customer lifetime value to understand subscriber loss and growth. --- - **Canonical URL:** https://dothecalculation.com/calculators/customer-churn-retention-calculator - **Category:** Business tools - **Publisher:** Do The Calculation (https://dothecalculation.com) - **Cost:** Free, no account or sign-up required - **Privacy:** Runs entirely in the browser; inputs are never sent to a server - **Methodology:** https://dothecalculation.com/methodology --- ## Analyze customer churn and retention rates Input starting customers, customer acquisitions, customer losses, and MRR metrics to calculate your churn rate, retention rate, and revenue impact. - Customer churn and retention rates - Monthly recurring revenue (MRR) churn - Average customer lifetime projections ## The Crucial Role of Retention in Subscription Models For software-as-a-service (SaaS) startups, mobile apps, and subscription box companies, customer retention is the ultimate driver of compound growth. It is far more cost-effective to retain an existing subscriber than to acquire a new one. Customer churn rate measures the percentage of your customer base who cancel their subscription or stop buying during a given period. High customer churn erodes marketing efforts, creating a "leaky bucket" where you must constantly acquire new users just to remain flat. To calculate customer churn rate, divide the number of customers lost during a period by the total number of customers you had at the start of that period. A healthy monthly churn rate for SaaS companies is typically under 1.5%. ## Calculating Customer Churn vs. Customer Retention While churn measures lost customers, the Customer Retention Rate (CRR) measures retained relationships. CRR tracks the percentage of active customers at the start of a period who remain active at the end, excluding new acquisitions. To calculate CRR, use the formula: ((End Customers minus Acquired Customers) divided by Start Customers) × 100. This ensures that new marketing signups do not mask customer cancellation trends. Customer churn and retention rates are essential unit economics metrics. Founders combine these calculations with a [customer acquisition cost calculator](/calculators/customer-acquisition-cost-calculator) to assess the health of their SaaS unit economics and LTV. ## Revenue Churn vs. Customer Churn In subscription businesses, customer churn does not always align with financial churn. Revenue Churn, or MRR Churn, measures the percentage of Monthly Recurring Revenue lost due to customer cancellations and plan downgrades. If high-paying enterprise customers cancel while low-paying self-serve customers remain, your revenue churn rate will be much higher than your customer churn rate. Alternatively, up-selling remaining customers can lead to "negative net churn," where revenue grows even if you lose users. To calculate revenue churn, divide lost MRR by starting MRR. Tracking both customer and MRR metrics is vital for financial forecasting, helping founders allocate customer success resources to high-risk contract cohorts. ## How to Use This Calculator Enter the number of customers you had at the start of the period, how many you acquired, and how many you lost, along with starting MRR and the MRR lost from cancellations and downgrades. The calculator returns customer churn rate, customer retention rate (which excludes new signups so growth doesn't mask cancellations), revenue churn rate, MRR retention rate, and the average customer lifespan in months. ## Worked Example: 2,000 Customers, 6% Monthly Churn A subscription business starts the month with 2,000 customers, acquires 300 new ones, and loses 120 to cancellation. Starting MRR is $40,000, with $2,200 lost to churn and downgrades. Customer churn rate: 120 ÷ 2,000 × 100 = 6%. Customer retention rate: ((2,180 − 300) ÷ 2,000) × 100 = 94%, where 2,180 is the ending customer count (2,000 + 300 − 120). Revenue churn rate: $2,200 ÷ $40,000 × 100 = 5.5%, so MRR retention is 94.5%. Customer lifespan: 100 ÷ 6 ≈ 16.7 months — the average subscriber sticks around just under a year and a half before churning. ## Related Calculators Feed this churn rate directly into the [customer acquisition cost calculator](/calculators/customer-acquisition-cost-calculator) to see its effect on lifetime value, or use the more detailed [SaaS cohort LTV calculator](/calculators/saas-ltv-cohort-calculator) for month-by-month retention modeling. To track the cost of the support operation working to reduce churn, see the [customer service cost calculator](/calculators/customer-service-cost-calculator). ## Frequently asked questions ### What is customer churn rate? The percentage of customers who cancel their subscription or stop buying from a business during a specific timeframe. ### How is customer churn calculated? Churn Rate = (Customers Lost divided by Customers at Start) × 100. ### What is Customer Retention Rate (CRR)? The percentage of customers active at the start of a period who remain active at the end, excluding new signups. ### How is Customer Retention Rate calculated? CRR = ((Customers at End minus Customers Acquired) divided by Customers at Start) × 100. ### What is Revenue Churn (MRR Churn)? The percentage of recurring revenue lost due to cancellations and plan downgrades during a period. ### What is negative net churn? A status where expansion revenue from existing customers (upgrades/cross-sells) exceeds revenue lost from churned customers, leading to MRR growth. ### What is Customer Lifetime (LT)? The average duration in months a customer stays before churning, calculated as 1 divided by the churn rate. ### What is a typical SaaS monthly churn benchmark? For mature B2B SaaS, monthly churn is typically 1% to 2%. For B2C subscriptions, monthly churn can range from 4% to 8%. ### How does churn impact business valuation? High churn reduces cash flow stability, which heavily discounts startup valuations during fundraising or acquisition. ### What is customer contraction? When a customer downgrades their subscription tier or reduces their usage seats, resulting in lower monthly revenue but not a full cancellation. ### Can churn be calculated weekly? Yes, but monthly or annual calculations are standard because subscription billing cycles typically run on a 30-day loop. ### What is customer success? A corporate department focused on helping customers achieve goals using the company's software, directly improving retention rates. ## Related concepts - **Customer Retention Rate (CRR)** — The percentage of starting customers who remain active at the end of a period. - **Revenue Churn** — The financial percentage of monthly recurring revenue lost from cancellations and downgrades. - **Expansion Revenue** — Additional monthly recurring revenue generated from existing customers upgrading their plans. ## Related guides - [Profit Margin: Formulas, Examples, and Calculator Guide](https://dothecalculation.com/blog/business/profit-margin-calculation) — Calculate gross, operating, and net profit margins, understand margin versus markup, and use each result to make better pricing and cost decisions. ## Related calculators - [Cohort Customer Lifetime Value (LTV) Calculator](https://dothecalculation.com/calculators/customer-lifetime-value-detailed-calculator) — Model customer lifetime value using discount rate, average order value, purchase frequency, and retention rate for cohort-based forecasting. - [Cohort SaaS LTV Calculator](https://dothecalculation.com/calculators/saas-ltv-cohort-calculator) — Calculate customer lifetime value using cohort-specific retention curves, discount rates, and average monthly subscription price. - [Customer Acquisition Cost (CAC) & LTV Calculator](https://dothecalculation.com/calculators/customer-acquisition-cost-calculator) — Calculate your customer acquisition cost, lifetime value, LTV to CAC ratio, and CAC payback period to measure marketing efficiency accurately. - [E-commerce Conversion Rate & Cart Abandonment Calculator](https://dothecalculation.com/calculators/ecommerce-conversion-calculator) — Calculate add-to-cart rate, cart abandonment rate, overall conversion rate, and lost revenue projections to optimize your online store. - [Lead Conversion Rate & Sales Funnel ROI Calculator](https://dothecalculation.com/calculators/lead-conversion-roi-calculator) — Estimate lead conversion rates, attributed revenue, campaign ROI, and cost per lead to measure how well your sales funnel performs. - [EBITDA & EBITDA Margin Calculator](https://dothecalculation.com/calculators/ebitda-calculator) — Compute EBITDA, EBITDA margin, and operating EBIT margin from revenue and operating expenses to evaluate core business profitability. --- _This calculator is for educational and business planning purposes only and does not constitute professional financial, tax, or legal advice. Verify all rates, margins, and contract terms before making operational business decisions._ --- _Source: [Do The Calculation](https://dothecalculation.com/calculators/customer-churn-retention-calculator). Quote freely with attribution and a link to this page._