How to calculate gym retention rate
Gym retention rate is the percentage of members you keep over a period, excluding new sign-ups. The formula is: retention rate = ((members at end minus members gained during the period) divided by members at start) times 100. It tells you how well your gym holds on to the members it already has.
The retention rate formula
Retention rate = ((E - N) / S) x 100, where S is the number of members at the start of the period, E is the number at the end, and N is the number of new members gained during the period.
Subtracting new members (N) is the step most gyms miss. If you do not remove sign-ups, a strong sales month can hide the fact that you are losing existing members out the back door.
A worked example
Say you start the month with 200 members (S = 200). During the month you sign 30 new members (N = 30) and end with 210 members (E = 210).
Retention rate = ((210 - 30) / 200) x 100 = (180 / 200) x 100 = 90%. So even though your headcount grew by 10, you actually retained 90% of the members you began with and lost the other 10%.
How to track it without spreadsheets
Calculating retention by hand each month is tedious and error-prone. GymNudge keeps a live view of active members, renewals, and who has gone inactive, so the underlying numbers are always current and you can see the trend instead of reconstructing it.
Frequently asked questions
What period should I measure retention over?
Both monthly and annual retention are useful. Monthly retention shows fast-moving problems; annual retention shows the bigger picture. Pick a period and measure it consistently so the trend is comparable over time.
Is retention rate the same as renewal rate?
They are related but not identical. Renewal rate looks specifically at members whose membership came up for renewal and chose to continue. Retention rate looks at the whole member base over a period.