Churn Rate Calculator
Churn is the tax on every customer you ever win. Acquire all you like — if they leave through a hole in the bottom of the bucket, growth stalls and the numbers never quite add up. Enter how many customers you started with and how many slipped away to see exactly how big that hole is.
Customer churn rate = customers lost during a period ÷ customers at the start of that period, expressed as a percentage. It is the share of your base that leaves in a given month or year. A low churn rate means revenue compounds on a stable foundation; a high one means you are constantly re-buying customers you already had. Because monthly churn compounds, even a number that looks small — say 5% a month — can erase more than half your base over a year.
Churn Rate Calculator inputs and result
| Churn rate | What it signals |
|---|
How to use this calculator
- Fix the start-of-period countUse the number of active, paying customers at the very start of the window. A mid-period or average count blurs the math and makes churn look better or worse than it is.
- Count only the customers who leftAdd up cancellations and lapses during the period. Do not net out new sign-ups — mixing acquisition into the churn number hides the leak you are trying to measure.
- Pick the right periodMonthly suits subscription and SaaS reporting; annual suits slower cycles. The tool also projects monthly churn to a yearly figure so the compounding is visible.
- Read the rate and the verdictCompare your churn against the bands, but weight your own history and model most. The retained share and annualized number show the same story from two angles.
- Export the resultCopy a share link, pull the CSV into your retention model, or print a PDF for the leadership review.
RGM Expert Says
Churn is the metric founders most want to round down. We hold the line on the definition because the math is unforgiving: a monthly churn rate compounds, so the gap between 3% and 6% a month is not double the pain — over a year it is the difference between keeping most of your base and losing most of it. Getting the number honest is the whole job before any fix.
The first cut we make is voluntary versus involuntary churn. A surprising share of lost customers never decided to leave — their card expired and the payment failed. That involuntary churn is the cheapest to recover, through smarter dunning, card-updater services, and well-timed reminders, and we always chase it first because it buys back revenue with almost no product work.
For voluntary churn we go to the cohort curve, not the blended average. A single headline rate can hide a brutal first-month drop-off masked by a loyal long-tail. We look at where the curve bends, tie it to the onboarding and first-value moment, and fix the experience that the largest leaving cohort shares. That is far more effective than spraying retention offers at everyone.
How it works
Churn rate is a simple ratio of losses to the starting base, but the period you choose changes how it compounds.
- Customers at start — active, paying customers at the very beginning of the period.
- Customers lost — cancellations and lapses during the period, before any new sign-ups.
- Period — monthly or annual; monthly churn is also compounded to a yearly figure.
This is customer (logo) churn. Revenue churn weights each loss by its spend and can differ sharply when your largest accounts behave differently from your smallest. The annualized figure assumes the monthly rate holds.
Why a small churn number is a big deal
The reason churn deserves obsessive attention is compounding. A 5% monthly churn rate sounds modest, yet if it holds it erases well over half of a customer base inside a year. Because the loss compounds month over month, the cost of churn is always larger than the single-period figure suggests — which is exactly why the tool projects your monthly rate to an annual one.
Not all churn is the same. Involuntary churn — failed payments, expired cards — can account for a meaningful slice of cancellations, and it is the cheapest to win back through better dunning and card-updater tools. Voluntary churn reflects a value problem, and the fix lives in onboarding, product, and the first-value moment, not in a last-ditch discount.
Churn also sets the ceiling on growth. If acquisition only refills the bucket, net growth is whatever leaks past the hole. That is why retention work usually returns more than the same effort spent on acquisition: keeping a customer protects all the future revenue you already paid to win, and quietly improves your lifetime value at the same time.
Churn rate context
Acceptable churn depends heavily on model, price point and contract length. Monthly consumer subscriptions churn faster than annual enterprise contracts, so read any range as orientation.
| Model | Typical monthly churn | Note |
|---|---|---|
| Annual SaaS / enterprise | Low single digits a year | Measured annually, not monthly |
| SMB SaaS | Roughly 3% to 5% / mo | Onboarding decides much of it |
| Consumer subscription | Often 5%+ / mo | High involuntary share |
| Mobile / app | Can exceed 10% / mo | First-week retention is decisive |
What operators say about churn
Loyalty economics are brutal in their honesty: the value of a business is built on the customers it keeps, not just the ones it wins.
Growth that ignores retention is a treadmill — you can run hard and stay exactly where you started.