Gym Membership Unit Economics: LTV, Churn, and the Cost of a $10 Discount

Ask a gym owner how many members they have and you will get an exact number, sometimes to the person. Ask what a member is worth over their whole time at the gym and the room goes quiet. That second number, lifetime value, is the one doing all the work. It decides how much you can spend to acquire a member, whether that January promo made money or quietly gave it away, and whether the 6am spin class deserves its slot. The good news is that the math takes four inputs you already have and about twenty minutes. Let me build it with you for a realistic 400-member gym, and then show you why a single point of churn is worth more than any promotion you will ever run.

The Four Numbers That Run a Membership Business

Four numbers, and everything else is commentary. Average revenue per member per month. Monthly churn, the share of members who leave each month. Member lifespan, which is simply 1 divided by monthly churn, so 6 percent churn means about 16.7 months. And customer acquisition cost, what it takes to land one new member. Lifetime value is monthly contribution times lifespan, and lifetime value against acquisition cost is your health check.

Calculating Your Real Churn

Churn is members lost in a month divided by members at the start of that month, and the honest version counts freezes and pauses that never come back. Measure your contract members and your month-to-month members separately, because they behave nothing alike. And in Arizona, respect the seasonality: summer attrition is real, so use a trailing twelve-month average rather than a flattering single month.

A Worked Example: The $89 Gym

Take a 400-member gym that is heavy on month-to-month. Average revenue per member is $89. Monthly churn is 6 percent, so expected lifespan is 1 divided by 0.06, about 16.7 months. Gross lifetime value is $89 times 16.7, or $1,486.

Now make it honest. Variable cost per member, meaning payment processing, towel service, app fees, and incremental utilities, runs about $12, so monthly contribution is $77. Contribution lifetime value is $77 times 16.7, or $1,286. Acquisition cost, all your ads and promos and staff time on tours divided by joins, is $180. Lifetime value to acquisition cost is $1,286 divided by $180, which is 7.1x. That is healthy, and it means this gym can afford to market harder than it currently does.

Why One Point of Churn Beats Any Promo

Here is the math that changed how I think about gym marketing, and I suspect it will change yours.

Our example gym charges $89 a month and loses 6 percent of members monthly. At 6 percent churn, the average member stays 1 divided by 0.06, about 16.7 months. After roughly $12 of variable cost per member, monthly contribution is $77, so a member is worth $77 times 16.7, which is $1,286 over their life at the gym.

Now cut churn by a single point, from 6 percent to 5 percent. Lifespan stretches to 20 months, and lifetime value becomes $77 times 20, or $1,540. That is $257 of new value per member, created without a single new lead, a dollar of ad spend, or a price change.

Multiply it out. Across a 400-member gym, one point of churn is worth roughly $103,000 in lifetime value. So when someone proposes spending $6,000 a year on a real retention program, structured onboarding in the first two weeks, a 30-day check-in call, and an alert when a member has not badged in for ten days, the question is not whether you can afford it. The question is whether that $6,000 can move churn a single point, because if it does, it returns seventeen times its cost.

The Discount Trap

Compare that to the classic promo month. A $10-off-forever offer feels small at 11 percent of the sticker price, but it comes entirely out of contribution: $77 drops to $67, and each discounted member's lifetime value falls by $167. You are giving up more than your whole acquisition cost to attract the segment of joiners who, in every gym I have looked at, also churn the fastest. Retention compounds in your favor. Discounts compound against you.

The better lever is to protect the monthly rate and move the one-time costs instead. Waive the enrollment fee or sell paid-in-full annuals. A waived fee is a single cost that leaves your recurring revenue and your price anchor intact, while a monthly discount follows the member for their entire lifespan.

Class and Program Profitability

Every class slot has its own small profit and loss, and the schedule is inventory to manage, exactly like court hours at a racquet facility. A class contribution is attendance times effective revenue per head, minus instructor cost. A $45 instructor with 6 attendees at $15 effective revenue brings in $90, leaving $45 before room cost. The same instructor in front of 3 attendees loses money before anyone racks a weight.

So treat the schedule like inventory, not tradition. Kill, move, or merge the chronically underfilled slots, the same discipline a court facility applies to empty court hours.

What to Review Monthly

The owner dashboard is short: average revenue per member, churn by cohort, lifetime value to acquisition cost, class fill rates, and net member growth. The data lives in your gym management software plus QuickBooks, and pulling it is a 45-minute monthly routine once it is set up. If you want the books side wired to produce these cleanly, we wrote a companion piece on bookkeeping for gyms and sports clubs.

When the Numbers Say Expand

Expansion multiplies your current unit economics, including the bad parts, so fix them before you add square footage. The thresholds worth respecting are simple: lifetime value to acquisition cost above 3x, churn stable on a trailing basis, and class fill above 60 percent. Clear those and growth compounds. Skip them and you are just buying more of a problem. The gyms and fitness page shows how we build these numbers with owners before they scale.