How to Calculate Gym Retention Rate (With a Worked Example)

To calculate gym member retention rate, use the S-E-N formula: take members at the End of the period, subtract New members who joined during it, divide by members at the Start, and multiply by 100. A studio that starts a quarter with 240 members, adds 60 and ends with 252 retained 80%.

That is the short answer. The rest of this post covers the counting rules that decide whether your 80% is real, and what to do on Monday morning once you have it.

What is the formula for gym member retention rate?

Retention rate equals end-of-period members minus new members, divided by start-of-period members, times 100. We call it the S-E-N formula.

Written out:

Retention rate = ((E − N) ÷ S) × 100

• S: members active at the start of the period
• E: members active at the end of the period
• N: new members who joined during the period

Subtracting N is the whole point. Without it, a strong sales month looks like loyalty. Picture a studio that loses 50 regulars and signs 50 newcomers in the same quarter. The headcount is flat, so the owner thinks nothing happened. With 240 members at the start, retention is actually (240 − 50) ÷ 240, or 79.2%. Fifty people who knew the schedule, the coaches and the parking situation are gone, and the sales team is running just to stand still.

How does the worked example play out across a quarter?

Our sample studio starts January with 240 members, signs 60 new members, and finishes March with 252, which works out to 80% retention.

Pull all three numbers from your billing records, never from memory or the class roster:

1. S on January 1: 240 active recurring members
2. N from January 1 to March 31: 22 in January, 18 in February, 20 in March, so 60 in total
3. E on March 31: 252 active recurring members

Then the math: (252 − 60) ÷ 240 = 192 ÷ 240 = 0.80. Retention for the quarter is 80%, and churn is 20%.

The membership grew by 12, which feels like a good quarter. The formula says the studio lost the equivalent of 48 members to get there, roughly four a week. That is the number to put on the whiteboard in the back office, because it tells you how many sign-ups you need each quarter just to stay level.

Who counts as a member on the first and last day?

A member is anyone with an active, paid recurring agreement at midnight on the boundary date. Drop-ins, class packs and lapsed trials do not count.

Write the rule down before you pull numbers, then do not change it mid-year. The edge cases that trip up most front desks:

• Plan changes. A member who moves from unlimited to 8 classes a month is retained. Some billing systems log a plan change as a cancellation plus a new sale, which inflates N and drags your rate down. Spot-check five plan changes in your export before you trust it.
• Notice periods. Someone who gives 30 days' notice on March 15 is still active on March 31. Count them in E for Q1 and as a loss in Q2.
• Intro offers. A client on a 30-day intro becomes a member when their first recurring charge clears, not when they buy the intro.
• Family plans. Count people or count agreements. Pick one and stay with it, because a three-person plan changes your numbers by a factor of three.

Why does the standard formula blame your regulars for new-member churn?

Someone who joins in February and cancels in March sits in New but not End, so they quietly drag down your starting cohort's score.

Go back to the example. Say 9 of the 60 newcomers cancelled before March 31. E is still 252, but now it is made up of 51 surviving newcomers and 201 people from the original 240. The S-E-N formula reports 80%. A cohort check, where you tag the 240 starters and count how many of those exact people are still active, reports 201 ÷ 240, or 83.8%.

That 3.8-point gap is the 9 newcomers who never made it past their first few weeks. The fix for that is a better first 30 days, not a loyalty program for your regulars. Run both numbers every quarter and the gap tells you where to spend your time.

How do you convert monthly churn into an annual retention rate?

Do not multiply monthly churn by 12. Compound it: annual retention equals one minus monthly churn, raised to the twelfth power.

The One Million Strong study, reported by Health Club Management, tracked more than a million North American club members over several years and recorded 33.6 cancellations per 1,000 members per month. That is 3.36% monthly churn.

• Multiplied: 3.36% × 12 = 40.3% churn, so 59.7% retention.
• Compounded: (1 − 0.0336)^12 = 0.664, so about 66.4% retention.

The multiplied version is off by almost 7 points, because each month's churn only applies to the members you still have. The compounded figure sits close to the same study's finding that 67.2% of members stayed at least 12 months.

What retention rate should a fitness studio aim for?

Benchmark against yourself first. The Health & Fitness Association's 2025 benchmarking report put average member retention at roughly two-thirds across 175 operators.

The HFA's 2025 Fitness Industry Benchmarking Report drew on 175 companies running more than 17,000 facilities in 27 countries. It is a useful industry reference, but the public release does not spell out how retention was calculated. That means you can compare to it loosely, but you cannot hold it against your own S-E-N number like for like.

Contract mix matters more than the headline. The One Million Strong study found month-to-month members were about four times more likely to cancel than members on 12-month terms. In a hypothetical 1,000-member club, that meant about 42 month-to-month cancellations a month against about 10 on annual terms. If 70% of your members pay monthly, you will trail a club that sells mostly annual contracts, even if your coaching is better. Split your retention by contract type before you compare it to anything, and read our breakdown of annual vs monthly membership pricing before you change your offer.

Which counting mistakes inflate retention the most?

Three mistakes inflate retention most: counting frozen members as active, ignoring failed payments, and mixing class-pack buyers into the membership base.

Freezes. A frozen member has not cancelled, so they stay in E. Report them on a separate line anyway. If 10 of the 192 retained members in our example are frozen, retention is 80% including freezes and (192 − 10) ÷ 240, or 76%, excluding them. Both numbers are true. Only the second tells you how many people are actually coming through the door.

Failed payments. A declined card is not a retained member. Set a rule: anyone whose payment has been failing for more than 14 days on the boundary date counts as lost. If they pay next month, log them as a win-back. How you collect matters here too. Our guide to ACH vs credit card billing for studios covers why expired cards cause so many silent cancellations.

Class packs. Pack buyers do not have an agreement to cancel, so they do not belong in S, E or N. Track them with a separate return rate, such as the share who buy a second pack within 60 days.

Which retention numbers should you track every week?

Track three numbers weekly: members who have not visited in 14 days, failed payments older than 72 hours, and freezes ending this week.

The quarterly rate tells you what already happened. These three lists tell you what is about to happen. Pull them every Monday before the 9am class:

• No visit in 14 days. For someone who usually trains twice a week, that is four missed sessions in a row. A habit is breaking.
• Failed payment over 72 hours. Many declines are expired or replaced cards. A text with a secure update link on day three usually recovers more than a letter on day twenty.
• Freezes ending in the next seven days. Book their first class back before the freeze lifts.

For how to score these signals and decide who gets called first, see our guide to at-risk member detection.

How do you act on the number once you have it?

Use the number to pick a cohort, not to feel good. Call the members behind the gap, starting with the ones who stopped visiting first.

There is good evidence that outreach works. An IHRSA Member Retention Report covered by Health Club Management, based on a large survey of UK club members, found that inactive members who were successfully re-engaged were 45% less likely to cancel than inactive members who got no contact. IHRSA added that any interaction with an at-risk member cut the likelihood of dropping out by nearly 10%.

Run it as Call, Book, Confirm:

1. Call. The coach who teaches that member's usual class makes the call, not a salesperson. Use their name and mention the class they used to attend.
2. Book. Book a specific class while you are still on the phone. Ending with "hope to see you soon" does nothing.
3. Confirm. The front desk checks that the member actually showed up, and if they did not, the coach texts them that afternoon.