Churn Rate Calculator
Calculate customer churn, revenue churn, customer lifetime, and the financial upside of reducing churn in a SaaS or subscription business before you decide whether retention deserves priority over more acquisition.
Your churn inputs
Total recurring revenue at the beginning of the period.
Results
Enter your customer and revenue inputs to calculate churn impact.
Need help finding the real cause of churn?
The calculator tells you how expensive churn is. The harder question is whether the leak sits in acquisition fit, onboarding, activation, pricing, or the core product experience.
How to use this churn rate calculator
Use the calculator when you need a clear view of how logo churn and revenue churn affect customer lifetime, LTV, and the economics of your growth model.
What to enter
- Customers at start: active customers at the beginning of the period.
- Customers lost: customers that fully churned in the same period.
- Starting MRR: recurring revenue at the start of the period.
- Revenue lost: optional, but useful if churn is concentrated in larger accounts.
Why churn matters
Churn is not just a retention metric. It changes LTV, compresses payback, and makes acquisition look healthier than it really is when you evaluate growth too early.
When churn deserves urgent attention
- Acquisition is getting more expensive: weak retention makes every new customer less valuable.
- Revenue churn is worse than logo churn: losing a few larger accounts may be the real problem.
- Payback keeps stretching: churn may be the hidden reason unit economics never quite improve.
What to look for
- Customer churn: tells you how many logos you are losing.
- Revenue churn: tells you how much recurring revenue is leaking.
- LTV sensitivity: shows how even modest churn reduction can expand customer value materially.
Where to look after the math
If churn is meaningfully constraining growth, the next step is not just “do retention.” It is figuring out whether the leak starts with poor-fit acquisition, weak onboarding, slow activation, pricing misalignment, or low ongoing product value.
LTV Calculator
Pressure-test customer value using ARPU, churn, and gross margin.
CAC/LTV Ratio
Connect churn and LTV back to acquisition efficiency and payback.
Retention Calculator
Compare retention and churn outcomes from the logo-retention angle.
How this calculator works
Use customers and recurring revenue from the start of the same month. Lost MRR means cancellations; this model does not include expansion or contraction among retained customers.
- Customer churn = customers lost ÷ starting customers. Monthly retention = 1 − customer churn.
- Revenue churn = lost MRR ÷ starting MRR. Leave lost MRR blank to estimate it using average revenue per customer; entering zero means an actual zero.
- Approximate lifetime = 1 ÷ monthly customer churn. Approximate gross-margin LTV = monthly revenue per customer × gross margin ÷ monthly customer churn.
- Modeled MRR preserved = lost MRR × relative churn reduction. Annualized gross profit preserved = that MRR × 12 × gross margin.
The lifetime and LTV formulas assume constant churn and average revenue; zero observed churn cannot establish an infinite lifetime. Annualization is a simple scenario, not a cohort cash-flow forecast. Gross revenue churn includes contraction when measured comprehensively; net revenue retention also includes expansion. Neither is calculated here.
Example: 1,000 customers, 50 cancellations, $50,000 starting MRR, $2,500 lost MRR, and 80% margin produce 5% monthly churn and approximately $800 LTV. A 20% relative reduction models $500 MRR preserved. These are hypothetical inputs.
Use the retention calculator for the complementary retention view, or explore onboarding optimization to address early customer drop-off.
Common questions
What is a good churn rate for SaaS?
As a rough rule, monthly logo churn under 2% is strong for B2B SaaS, 2-5% is workable, and anything materially above that usually deserves attention. The right benchmark depends on customer size, contract structure, and business model.
What is the difference between customer churn and revenue churn?
Customer churn measures how many customers leave. Revenue churn measures how much recurring revenue leaves. Revenue churn is often the more important business metric because losing a few large customers can matter more than losing many small ones.
Why does churn matter so much?
Churn directly affects customer lifetime, payback period, and LTV. A small reduction in churn often improves unit economics faster than a small increase in acquisition volume.