Most dojo owners track exactly one number: what landed in the bank this month. It is the easiest number to see and the least useful one to act on, because by the time it moves, the thing that moved it happened six to eight weeks ago. A student who stopped enjoying class in September shows up in your October attendance, your November cancellation, and your December bank balance. Three chances to notice, and revenue is the last of them.
This is a list of seven KPIs (key performance indicators: the few numbers that show how your school is really doing) worth half an hour on the first of every month. Two of the seven have no reliable published figure to compare against anywhere, and I will tell you which two.
Key Takeaways
- Count who leaves, not just who joins. A school that signed twelve students and lost eleven looks the same on paper as one that signed one and lost none. Gym membership grew 5.5% across 27 countries in the latest year (Health & Fitness Association, 2025).
- Watch attendance first: it warns you weeks before a student quits. In a study of 5,209 gym members, days without training predicted who would quit better than anything else (Sobreiro et al., 2021).
- Expect about a third of members to leave each year. Fitness clubs keep about two in three members (Health & Fitness Association, 2025).
- Some failed payments every month are normal. In the UK, 6.1% of gym Direct Debits failed in August 2026, against 2.4% for all payments (ONS, 2026).
- For trial classes and student lifetime value, compare against your own past months. There is no reliable industry figure for either.
If you are still deciding how to run the business side of your school at all, the complete guide to dojo management covers where measurement fits alongside scheduling, billing and belt tracking.
Why Seven, and Why Monthly
These seven earned their place against three criteria: you can compute each one from records a dojo already keeps, each one moves enough in a month to be worth reading, and each one has an obvious next action when it moves the wrong way.
That last criterion is what eliminated most candidates. A number you cannot act on is trivia, however interesting. Your social media following, the count of everyone who ever trained with you, the size of the martial arts market in your country: all real, none of them things you can change next Tuesday.
Monthly is the right rhythm for the same reason. Weekly figures jump around too much at dojo size: with 40 students, one flu week or one school holiday is enough to throw them off. Once a year is too late to fix anything. A month is long enough to average out a bad Tuesday and short enough that you can still catch a student who is drifting.
No one publishes reliable figures for martial arts schools, so the numbers below come from gyms and fitness clubs, the closest comparison available.
1. Active Members and Net Growth
Count the students who are actually training and paying, then track the change, not the total.
Net growth is joiners minus leavers for the month. The total flatters you, because a school that signed twelve students and lost eleven looks identical to a school that signed one and lost none, and those are completely different businesses. Write both halves down separately. Most owners can recall who joined and struggle to name who left, which is itself the problem.
Gyms and fitness clubs give you the closest comparison. In the latest year, membership grew 5.5% across 27 countries (Health & Fitness Association, 2025), 5.8% across Europe, to 75.5 million members (EuropeActive and Deloitte, April 2026), and 5.6% in Germany (DSSV, March 2026). For gyms, 5 to 6% a year is normal growth: on 40 students, that would be two more than a year ago.
What to do when it moves: a negative month is normal and a negative quarter is a pattern. If you lost more than you gained twice in a row, stop looking at marketing and go look at KPI 3, because the students you are about to lose have usually already stopped turning up.
2. Monthly Membership Income and Revenue per Student
Monthly membership income (sometimes called monthly recurring revenue) is what you expect to collect from memberships in a normal month, not counting seminar fees, grading fees and shop sales. Revenue per student is that figure divided by the number of active students.
Track the second one. Total income rises when you add students and tells you nothing else; revenue per student tells you whether your prices are holding. A school whose membership grew 10% while revenue per student fell 12% is working harder for less money, and only the second number shows it.
There is no published figure for what dojos charge, so the nearest comparison is what gyms charge in each country:
- Germany: EUR 48.55 a month on average. Independent single gyms charge EUR 59.24, the big chains EUR 40.54 (DSSV, March 2026).
- Austria: EUR 50.17 a month on average. Independent single gyms charge EUR 56.68, the chains EUR 42.55 (WKO, Eckdaten der Fitnesswirtschaft Österreich 2025, figures for 2024).
- UK: £48.45 a month at private gyms and £33.16 at public ones (LeisureDB, via Health Club Management, June 2025).
- US: $65 a month on average in 2023, the latest year with a public figure (Health & Fitness Association, October 2024).
In all four countries, an average gym membership costs roughly 50 to 65 a month in the local currency. Where the figures are split, independent gyms, the closest match to an owner-run dojo, charge more than the chains, which is worth remembering the next time someone tells you to compete on price. The more useful check is still your own: total monthly membership income divided by active students, compared with your last three months. For the cost side of the same equation, see the breakdown of what it costs to run a martial arts school.
What to do when it moves: a falling figure with flat membership usually means discounts that quietly piled up, a family rate you stopped tracking, or students sliding onto cheaper plans. Pull the list of who pays what and read it. It is a fifteen-minute job that most owners have not done in two years.
3. Attendance Rate
Attendance rate is the share of the classes on a student's timetable that they actually came to this month.
No one publishes attendance figures for martial arts schools, so here is what I go by from running my own dojo. Students who come to more than 75% of their classes are doing well. Between 50% and 75% is normal. Under 50% usually means a student is about to stop coming altogether.
This is the most valuable number on the list, because attendance warns you before anything else does. In a study of 5,209 members of a gym in Lisbon, followed over three years, researchers looked for what best predicted who would quit. By far the strongest sign was how many days a member had gone without training. How long they had been a member and how much they had paid mattered much less (Sobreiro et al., International Journal of Environmental Research and Public Health, 2021).
What to do when it moves: do not read the average. Read the individuals. Mark every student who came to under 50% of their classes this month and talk to them. That conversation is the most valuable time you will spend on the business all month, and you can only have it if you record attendance. If you still record it on paper, the comparison of manual and automated attendance tracking covers what changes. With children, the conversation is usually with a parent, and the guide to parent communication covers what to say.
4. Monthly Churn Rate
Churn is the share of your students who left during the month. Divide the number who cancelled or stopped paying by the number you started the month with.
Fitness clubs keep about two in three members over a year (Health & Fitness Association, 2025). So about a third leave within a year: on 40 students, that is about 13 people you have to replace before you grow at all, roughly one a month.
The important thing about churn is that it tells you too late. By the time a student cancels, the decision is weeks old. That is why KPI 3 sits above this one: attendance shows the same thing early enough to act on. The guide to student retention covers what to do about it, and the 90-day dropout window covers when it matters most.
What to do when it moves: split your leavers into students who left inside six months and students who left after two years. They are different failures. Students who leave early usually had a bad first few weeks. Students who leave late usually feel they have stopped progressing, which is where belt progression as a retention tool becomes the relevant lever.
5. Trial Classes That Turn Into Members
Trial conversion = people who signed up after a trial ÷ people who took a trial.
For example, 10 people came for a free class in March and 4 of them signed up for a membership: 4 ÷ 10 = 40%.
There is no reliable industry figure for this, so compare yourself against your own last three months.
Most dojos advertise a free first class. I think a free first week works better, because a beginner gets to try several classes before deciding.
What to do when it moves: if conversion drops, the cause is almost always in the follow-up rather than the trial itself: nobody called, nobody remembered the person's name, nobody told them which class to come to next. Write down what you actually do after a trial and see whether it is a process or a hope.
6. Student Lifetime Value
Lifetime value is the total an average student pays you before they leave: what they pay each month multiplied by how many months they stay.
Take a student paying EUR 59 a month, the average at independent German gyms. If about a third of members leave each year, the average member stays roughly two and a half years, so that student brings in about EUR 1,770 in total. Run it with your own two numbers and the result will mean far more.
Most dojos spend little or nothing on advertising, so the main use of this number is to show what one lost student costs you, and how much a conversation to keep them is worth.
What to do when it moves: lifetime value rises when churn falls, and churn falls through attendance and progression, not through price. If yours is falling, the cause is almost always in KPI 3 or KPI 4.
7. Payment Failure Rate
Count how many members paid on time this month, whether in cash or by automatic payment. The rest are your failed payments, and their share of all members is your payment failure rate.
This is where I found the most surprising data in the whole list. The UK Office for National Statistics publishes how often Direct Debits fail for each type of spending, using data from Pay.UK and Vocalink, the companies that run Direct Debit in the UK. Gyms have their own category. In August 2026, 6.1% of gym Direct Debits failed, up from 5.7% a year earlier, against 2.4% for all Direct Debits, up from 2.3% (ONS, published 17 September 2026).
So gym payments fail about two and a half times as often as payments in general, and the gap grew over the year. That comparison is my own calculation from the two ONS figures. The ONS puts the higher gym rate down to gym memberships being easier to give up and often cancelled.
This is UK data. Europe and the US publish no comparable figure.
The practical reading for a dojo owner is simple. A few percent of your expected income failing every month is normal for this sector, not a sign you have unusually unreliable students. The fix is in how you collect, not in how you talk to students. The guide to payment collection covers the mechanics, and European schools will find the SEPA Direct Debit mandate guide relevant to why bank debit behaves differently from cards. If you still collect by hand, the comparison of automated and manual dojo payments helps you decide when to switch.
What to do when it moves: track how long failed payments take to recover, not just how many fail. If 6% of payments fail but are sorted out within a week, it is a nuisance. If they take six weeks, or never arrive, you are losing real money.
The Seven KPIs at a Glance
What Not to Track
Negative advice is scarcer than positive advice and usually more useful, so here is what I would leave off the list.
Total income on its own. It rises when you add students and falls when you lose them, which you already knew from counting students. It hides the two things that matter, which are how many people you have and what each pays.
The total number of students you have ever taught. It only ever goes up. A number that cannot fall cannot tell you anything.
Social media followers. Unless you can trace a follower to a trial booking, this measures how you are doing at social media, not at running a dojo. Track trial bookings by where people heard about you instead, which is the same curiosity pointed somewhere useful.
Grading passes and new black belts. Students often stop training after they reach a new belt, black belt included, so a record number of passes can come just before a drop in students. The count looks good but says nothing about whether people stay; attendance after a grading (KPI 3) does.
Class headcount without the room size. Twelve students in a room that holds fourteen and twelve in a room that holds thirty are different situations. If you track headcount, track it as a share of what the mat can hold, because that is the version that tells you when to add a class.
Satisfaction survey scores. Scores such as Net Promoter Score, where students rate from 0 to 10 how likely they are to recommend you, swing wildly at dojo size. With 40 students and a handful of answers, one bad week moves the number and tempts you to react to chance. Ask people how it is going instead. At dojo size the conversation tells you more than the survey.
Anything you will not act on. This is the general case of all of the above. Before adding a number, say out loud what you would do differently if it moved 20%. If there is no answer, it is trivia.
How to Run the Monthly Review in 30 Minutes
Pick the first working day of the month and put it in the calendar as a recurring appointment. The habit matters more than the tools.
Minutes 1 to 5: write down the five headline numbers. Active students, joiners, leavers, monthly membership income, payments that failed. Same five places every month, in the same order, so the comparison is instant.
Minutes 6 to 15: mark the students who are slipping. Go down the attendance list and tick everyone who came to under 50% of their classes this month. Each ticked name goes on a list for a conversation. This is the part that actually saves students, and it is the part most likely to get skipped. It only works if you record attendance in a spreadsheet such as Google Sheets or in dojo management software: from paper records you cannot do this step at all.
Minutes 16 to 25: work out two numbers. Churn (students who left divided by students at the start of the month) and revenue per student. Write them beside last month's so you see which way they are going.
Minutes 26 to 30: choose exactly one action. One conversation, one follow-up, one price check. A review that produces a spreadsheet and no decision was a waste of half an hour, and doing one thing reliably beats listing six you will not get to.
If pulling those numbers together takes you the full thirty minutes before you have thought about any of them, the problem is your records, not your discipline. The signs your dojo has outgrown a spreadsheet covers when that tips over. One related point worth settling early: decide who else sees these figures, because revenue and payment data is not the same as attendance data, and role-based access for dojo staff covers where to draw that line.
From my own dojo: I ran a 40-student Aikido school on a Google Sheet for two years, and I could have told you our revenue to the euro in any given month. What I could not have told you was our churn, because I never wrote down who left. Students simply stopped appearing, and my memory quietly rounded them out of the count, so the school felt stable while it was slowly leaking. The first month I actually subtracted leavers from joiners was unpleasant and worth more than every revenue chart I had made until then. That is the whole argument for this list: not that these seven numbers are clever, but that the uncomfortable ones are the ones you will not track by accident.
Frequently Asked Questions
What KPIs should a martial arts school track?
Seven are enough for a monthly review: active members and net growth, monthly membership income and revenue per student, attendance rate, monthly churn rate, trial-to-member conversion, student lifetime value, and payment failure rate. Each one can be worked out from records a dojo already keeps, moves enough in a month to be worth reading, and has a clear action attached when it changes. Attendance rate is the most valuable of the seven, because it is the only one that warns you about a problem before it costs you money.
How do you calculate monthly churn for a dojo?
Divide the number of students who cancelled or stopped paying during the month by the number of active students you had at the start of the month. For comparison, gyms and fitness clubs keep about two in three members over a year, so about a third leave within a year. On 40 students, that is about 13 people a year you have to replace before you grow at all.
What is a good attendance rate for a martial arts school?
There is no published figure for martial arts schools, so measure each student against their own timetable: the share of their classes they came to this month. In my experience running a dojo, students who come to more than 75% of their classes are doing well, between 50% and 75% is normal, and under 50% usually means the student is about to stop. Talk to anyone under 50% before they go.
How much revenue should a dojo make per student?
There is no published figure for dojos, so the nearest comparison is what gyms charge. An average gym membership costs EUR 48.55 a month in Germany (EUR 59.24 at independent gyms), EUR 50.17 in Austria (EUR 56.68 at independent gyms), £48.45 at private gyms in the UK and $65 in the US (2023). Independent gyms, the closest match to an owner-run dojo, charge more than the chains. The more useful check is your own: total monthly membership income divided by active students, compared with your last three months.
Why do martial arts membership payments fail so often?
Gym memberships are harder to collect than most regular payments. UK government figures built from Direct Debit data show 6.1% of gym Direct Debits failing in August 2026, against 2.4% across all types of spending, and both were higher than a year earlier. So gym payments fail about two and a half times as often as payments in general. The Office for National Statistics puts this down to gym memberships being easier to give up and often cancelled. A few percent of expected income failing each month is normal for the sector rather than a sign of unreliable students, so treat it as a collection problem and track how long failures take to recover.
DojoMaster records attendance, tracks belt progression, and collects monthly dues by SEPA Direct Debit, so the raw inputs for most of the seven numbers above sit in one place instead of three spreadsheets. Start free at dojomaster.app for up to 20 students, with paid plans from EUR 24/month.
Written by Daniil Pavliuchkov, 4th dan Aikido Aikikai and founder of DojoMaster.
Sources: Health & Fitness Association 2025 Fitness Industry Benchmarking Report, Health & Fitness Association, US membership dues 2023, EuropeActive and Deloitte European Health & Fitness Market Report, DSSV Eckdaten der deutschen Fitnesswirtschaft 2026, WKO Eckdaten der Fitnesswirtschaft Österreich 2025, LeisureDB State of the UK Fitness Industry Report 2025, via Health Club Management, ONS economic activity and social change real-time indicators, Sobreiro et al., IJERPH (2021).
