Customer Retention Rate (CRR) Calculator
From starting customers, ending customers and new acquisitions, compute the true retention of existing customers (CRR).
Input Data
Results
At a glance:CRR = (ending customers - new customers) / starting customers x 100%. Subtracting new customers is essential — otherwise new wins are mistaken for retained old customers and CRR is overstated (even absurdly >100%). Example: start 1,000, new 200, end 1,100 → retained 900, CRR 90% (100 churned). CRR + churn = 100%. WARNING: Compare with peers/history; varies by industry and period. Education, not advice.
Formula
Retained = ending customers − new customers acquired.
CRR = retained / starting customers × 100%.
$$\text{Retained} = \text{End Customers} - \text{Acquired Customers}$$$$\text{CRR} = \dfrac{\text{Retained}}{\text{Start Customers}} \times 100\%$$How to Use
- Enter starting customer count.
- Enter ending count and new acquisitions.
- View retained customers and CRR.
FAQ
Why subtract new customers?
Because the ending count mixes two groups — old customers kept and new ones won. Retention should measure only how many of the original stayed, so the numerator must be ending minus new; otherwise you'd count new customers as 'retained' and inflate the rate.
How is retention related to churn?
They sum to 100%. Retention tells 'how many kept', churn tells 'how many left' — opposite but complementary; analyse both, and use the churn-rate calculator for thesame-period figure.
What is a good retention rate?
No universal standard — depends on industry and period. Subscription/SaaS pursue high monthly/annual retention; retail/F&B fluctuate more. Best practice: compare with your own history and peers, watch the trend — rising retention is a positive signal.
Why must we subtract new customers (again)?
It is the most error-prone step. The ending ledger mixes 'old customers still there' with 'newly acquired'. CRR wants pure retention of the original base. Directly dividing ending by starting can exceed 100% (e.g. 1,100/1,000 = 110%, logically impossible). Correct: retained = 1,100 - 200 = 900; CRR = 900/1,000 = 90%. This honestly reflects 'of 1,000 originals, 900 stayed, 100 left'. Subtracting new customers strips their contribution so retention isn't masked by acquisition — a company can look like it's growing while quietly leaking old customers; correct CRR exposes that.
How do retention, churn and CAC interplay, and why does retention matter?
They depict the health of your customer economy. Retention + churn = 100% always. Retaining an existing customer usually costs far less than winning a new one (CAC) — keeping customers extends the value of each acquisition (higher LTV). Healthy models satisfy 'LTV >> CAC' (often LTV/CAC >= 3), and high retention is the engine behind LTV. So rather than pouring all resources into acquisition, plugging churn first is often higher-ROI. Pair with the churn-rate, CAC and LTV calculators.
Related Tools
References
Content review: Calculatorism Finance Team. Results are for reference only; please refer to the relevant authorities for the official figures.