Churn & Retention Calculator
Model how retention improvements compound over time.
Result
Cutting monthly churn from 4% to 2.5% keeps 150 more of today's 1,200 customers after 12 months, worth $142,895.68 of extra revenue over that span. New customers are not modelled.
Customers left after 12 months
Of 1,200 customers today, with no new sign-ups.
How to use it
- Enter active customers, current monthly churn, the churn reduction in percentage points, monthly ARPU, and the planning horizon. Even a 1-point monthly churn improvement can compound into a large revenue difference over 12 months or more.
- Read the customers kept at the horizon, the improved churn rate, customers left under current and improved churn, and the cumulative revenue lift. The longer the horizon, the more that a small monthly churn change compounds into a meaningful retention outcome.
- Use the cumulative revenue lift to judge whether retention work beats acquisition work. If a 1-point churn improvement produces more revenue than your next paid acquisition campaign, the retention project likely deserves priority.
- Turn the model into concrete action by mapping the lift to onboarding fixes, support response targets, save offers, or product reliability work. Then segment the math by plan or cohort because enterprise and SMB churn rarely behave the same way.
- Re-run monthly by segment and compare modeled lift to actual churn improvements. Track both ending customer counts and revenue lift so retention efforts are measured against cash impact, not just percentage slogans.
Questions people usually ask
Why do small retention improvements matter so much?
Because retention compounds. Saving even a small slice of customers or revenue every month can create a much bigger lift over a year than teams expect.
What is the difference between churn and retention?
They are opposite views of the same thing. Churn measures what you lose. Retention measures what you keep.
Should I look at customer churn or revenue churn?
Both can matter. Customer churn shows logo loss, while revenue churn shows how much money is walking out the door.
Can this help me prioritize a retention project?
Yes. It helps you see whether the likely lift is big enough to justify the work before you commit team time or budget.
Is this tool free and private to use?
Yes. AI Biz Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.
Is this professional advice?
No. Outputs are business planning estimates — not legal, tax, or accounting advice.
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Articles
- 11 min read SaaS Churn: Cohort vs Aggregate vs Net Dollar
SaaS churn three ways: aggregate churn, cohort churn and net dollar retention give different answers from one dataset. The math, and which to use when.
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Use it from code
The same calculation as a JavaScript module you can import. It runs where you import it, with no request, key or rate limit.
import { compute } from "https://aibizhub.io/engines/churn-retention-calculator.js";Input and output contract, TypeScript types and the guide for agents.