Monthly to Annual Churn Calculator
Convert a monthly churn rate into the equivalent annual churn using the compound formula. Small monthly numbers turn into big annual ones.
Tip: most SaaS lives between 1% (enterprise) and 6% (consumer/SMB).
Annual churn rate
45.96%
Retention after 12 months
54.04%
1 - (1 - 5/100)^12 = 0.4596
Monthly churn compounds. Of 100 customers today, roughly 54 will still be around in 12 months.
The formula
Annual Churn = 1 - (1 - Monthly Churn)12
The compound version is the correct one. Multiplying monthly by 12 inflates the result because it assumes you keep losing the same absolute number every month — but the base is shrinking.
Reference table
| Monthly churn | Annual churn (compound) | Customers left after 12 months |
|---|---|---|
| 1% | 11.4% | 89 out of 100 |
| 2% | 21.5% | 79 out of 100 |
| 3% | 30.6% | 69 out of 100 |
| 4% | 38.7% | 61 out of 100 |
| 5% | 46.0% | 54 out of 100 |
| 6% | 52.6% | 47 out of 100 |
| 8% | 63.4% | 37 out of 100 |
| 10% | 71.8% | 28 out of 100 |
Example calculation
You measure 4% monthly churn. Plugging in:
- 1 - (1 - 0.04)^12
- 1 - 0.9612 = 1 - 0.6127 = 0.3873
- Annual churn ≈ 38.7%
- That means just 61 out of every 100 customers will still be around in 12 months.
When to use this
Use this when you have a monthly number and need to think in yearly terms — for a board update, an investor deck, or a planning spreadsheet. Use it in reverse to translate an annual benchmark into a monthly target.
What to do next
Small monthly churn becomes painful annual churn. The fastest fix is usually plugging the involuntary churn leak. Run the Failed Payment Recovery Calculator and then the free Churn Leak Report.
Frequently Asked Questions
How do you convert monthly churn to annual churn?
Use the compound formula: Annual Churn = 1 - (1 - Monthly Churn Rate)^12. A 5% monthly churn rate becomes ~46% annual churn, not 60%. The compounding happens because each month you are churning from a shrinking customer base.
Why can't I just multiply monthly churn by 12?
Multiplying overstates annual churn. By month 12, the customer base is much smaller than at month 1, so the absolute number of customers lost shrinks even when the rate stays the same. The compound formula captures that correctly.
Does the same formula work the other way?
Yes. To convert annual churn into the equivalent monthly rate, use Monthly Churn = 1 - (1 - Annual Churn)^(1/12). A 30% annual churn rate is about a 2.94% monthly rate.
What about quarterly churn?
Same compound logic: Annual Churn = 1 - (1 - Quarterly Churn)^4. A 10% quarterly churn rate compounds to about 34% annual.
How ChurnNote helps
Small monthly churn becomes painful annual churn. ChurnNote helps you find why customers leave before it compounds.
ChurnNote connects to Stripe or Lemon Squeezy and automatically captures cancellation reasons, recovers failed payments, and queues win-back emails. So you stop losing revenue silently.
Start recovering churnNext step
Find out where your annual churn is actually leaking
The Churn Leak Report breaks 12 months of cancellations and failed payments into a single shareable view.
Related tools