Most academy owners can tell you their member count and nothing else about their business. Member count is the vanity metric of gym ownership: it goes up when you are doing well and it also goes up while you are quietly losing money, because it says nothing about who is paying, who is about to leave, or where the revenue actually comes from. Here are the seven numbers that do, each with a formula, an honest benchmark where a published one exists, and what to do when the number is bad. You can pull all seven from any competent gym platform, or from a spreadsheet and patience; what matters is that you look at them monthly.
1. Net member growth, not member count
Formula: new members this month minus cancellations this month. A gym that adds eight and loses nine is shrinking no matter what the total says, and because most academies bill monthly, this number is your revenue trajectory two or three months early. Track it as a monthly line, and split it kids versus adults; the two populations grow and churn for different reasons, and a healthy kids program routinely hides a decaying adult one.
2. Monthly churn rate
Formula: cancellations this month divided by members at the start of the month. This is the number that compounds. The health-club industry's long-running benchmark, from IHRSA's Profiles of Success research, is 28.6% annual attrition, which averages out near 2.8% a month. Group-training businesses do better than open-floor gyms: a study by The Retention People that IHRSA circulated found 88% twelve-month retention for members training in groups versus 82% for gym-only members, and members who exercised alone carried a 56% higher cancellation risk. BJJ is a group-training product with a progression system, so a well-run academy should live at or under 2.5% monthly for adults; if you are above 4%, retention is your whole job right now, and the white-belt retention playbook is the place to start. When you diagnose churn, separate quits from moves: IHRSA trend data attributes 23% of losses to non-use and 38% to cost, and each of those has a different fix.
3. Average revenue per member
Formula: total monthly revenue divided by active members. The US average BJJ membership is $146.15 a month per Gold BJJ's State of Jiu Jitsu survey of roughly 2,000 practitioners, and a smaller Grapple Tactics survey of 58 gyms in four big states put typical adult pricing between $161 and $195. If your ARPM sits meaningfully below $146, you are either underpriced for your market or your mix is heavy on legacy rates and family discounts. Raising it does not have to mean raising the headline price: privates, a competition-team tier, annual-paid discounts that pull cash forward, and merchandise all move ARPM. We wrote up the pricing-model options, including how to raise rates without a revolt, in the membership pricing guide.
4. Revenue mix
Formula: memberships, privates, merchandise, events, each as a share of total revenue. Memberships should dominate, 80% or more, because recurring revenue is what makes the business survivable, but a gym with zero non-membership revenue is leaving its most engaged students unserved. The useful discipline is to price and track each stream separately, so a strong seminar month never papers over a weak membership month in the total.
5. Payment failure rate (involuntary churn)
Formula: failed charges this month divided by total charges. This is the most ignored number on the list. Expired cards, replaced cards, and insufficient funds silently convert paying members into free ones, and most owners only notice at quarter-end. A healthy academy keeps failed payments under 3% of charges with automatic retries and card-updater support, and treats every failure as a same-week conversation, since a member whose payment fails and who hears nothing has just learned training is free. Moving willing members to bank transfer helps twice: ACH fails less often than cards and costs a fraction of card processing, which is covered in the billing guide.
6. Trial-to-member conversion
Formula: trials who join divided by trials who started, measured on a cohort at least 30 days old. Leads and trials are where marketing money dies quietly: the ad worked, the person walked in, took two classes, nobody followed up, and they joined the gym down the road. Whatever your top of funnel looks like, the conversion of trial to paying member is the number that turns marketing spend into revenue, and the follow-up cadence in the days after a first class is where it is won. This is the exact gap Kmura's lead alerts exist for: the system flags a trial going cold and drafts the follow-up, and your coach sends it in two clicks.
7. Overhead ratio: software plus processing as a share of revenue
Formula: monthly software cost plus payment processing cost, divided by monthly revenue. Run it once and you will never unsee it. A 100-student academy at the $146 average bills about $14,600 a month. At a 2.9% + 30¢ card rate, processing is about $453 a month; at 2.6% + 30¢ it is about $410; and subscriptions at this size run from $149 to $229 on the per-member-priced platforms (Kmura stays $150 flat at any size). That range, roughly $560 to $680 a month all-in depending on your stack, is about 4% to 5% of revenue, and the difference between the cheap and expensive ends of it is over $1,400 a year that buys you nothing. The full worked comparison across platforms is in the buyer's guide.
Running the review
None of these numbers needs a dashboard meeting. The workable cadence for a single-location academy is monthly, thirty minutes, same seven numbers in the same order, written down so the trend is visible. The point of software is to make that half hour free of data gathering; Kmura's reports cover these numbers, and its nightly AI review flags the members and leads behind the bad ones before they become cancellations. If you want to see it on your own gym's shape rather than a demo dataset, book a walkthrough and bring last month's numbers.
