Most studio owners read their schedule as a calendar. Slots to fill, instructors to assign, gaps to worry about. That view hides the thing that actually determines whether you make money. Every class on your grid is a small business unit with its own economics. It has a fixed cost that you pay whether two people show up or twelve, and a revenue line that swings with attendance. When you stop reading the schedule as a timetable and start reading it as a profit and loss statement, the losers stop hiding.
The reason this matters is simple. Your instructor gets paid the same for a 6am class with four heads as they do for a 6pm class with fourteen. The cost is fixed at the moment you publish the slot. The revenue is not. That gap between a committed cost and a variable fill is where studios quietly bleed, and a monthly total will never show it to you.
The fixed cost sits under every slot
Start with what you owe the moment a class exists. The dominant variable cost per attendee in a boutique studio is small and predictable. WellnessLiving's break-even model puts it at around nine dollars per attendee, made up of six dollars in instructor per-class pay, one dollar fifty in payment processing, and one dollar fifty in cleaning and amenities. Note where the weight sits. Instructor pay is the largest single component, and in most pay structures it is fixed per class, not per head.
That is the crux. If you pay an instructor a flat rate to teach, that money is spent when you open the slot. A class with four attendees and a class with twelve carry the same instructor cost. What changes is how many people you spread it across. This is why a slot is not a calendar entry. It is a fixed cost waiting for variable revenue to cover it.
Revenue per spot, then contribution per class
Two numbers turn a slot into a P&L line. The first is revenue per spot, which is simply what one attendee is worth in that class. For a group reformer session, Pilates group reformer classes average around twenty to thirty dollars, rising to as much as forty-five dollars in major coastal cities. Membership and package pricing complicates the exact figure, but you can derive an effective revenue per visit by dividing what a member pays by the visits they actually take.
The second number is contribution per class. Take the revenue the class actually earned, subtract the variable cost of the heads in the room, and subtract the fixed instructor cost. What remains is what the class contributed toward your rent, your software, your insurance, and your profit. In the WellnessLiving example, a drop-in priced at twenty-two dollars against a nine dollar variable cost leaves a contribution margin of thirteen dollars per attendee. Multiply that by heads in the room, then subtract the fixed instructor cost the studio has already committed, and you have the true result of that slot.
Run this for one week and the schedule reorganises itself in front of you. Some classes throw off healthy contribution. Some cover their instructor and little else. Some lose money every time they run.
Why the studio average hides the losers
Here is the trap. Owners look at a single monthly number and feel reassured. The healthy class utilisation benchmark sits at 70 to 85 percent and above, and if your studio average lands in that band you assume the schedule is working. It may not be. An average is a blend, and a blend can be carried by a handful of packed peak classes while a long tail of half-empty slots drags underneath.
Consider what break-even actually requires. In the same model, a studio with ten thousand dollars in monthly fixed costs needs roughly 770 paid attendances a month, which works out to about eight students per class across a hundred classes. That is the floor. A class averaging eight is not comfortable. It is breaking even. Every class sitting below eight is being subsidised by the ones above it. Your monthly average can look fine while a third of your grid runs at a loss.
The stakes are not trivial. Across health clubs the median EBITDA margin was 23.6 percent in 2024, and among studios specifically, only 17 percent operate at profit margins above 20 percent. The difference between the studios that clear that bar and the ones that do not is rarely price or marketing. It is usually the shape of the schedule, and specifically the slots the owner never examined at the class level.
Read the grid class by class
The discipline is to stop trusting the aggregate. Pull attendance for every slot over a representative month, not a single week that could be seasonal. For each recurring class, write down average heads, contribution per run, and how many times it fell below your break-even head count. You are looking for three groups.
- The earners. Consistently above break-even heads, throwing off real contribution. Protect these and understand why they work, because the pattern often repeats if you copy the time, format, or instructor.
- The marginal. Hovering near break-even. These are candidates for a nudge, a better time slot, a format change, or a marketing push, before you touch anything drastic.
- The losers. Reliably below break-even, month after month. These are the classes an average is hiding. They are not automatically for the chopping block, but they must earn their place with something other than habit.
What to do with this
A loss-making slot has four honest options and you should name which one you are choosing. You can fix the fill, by moving the class to a time with proven demand or changing the format to one members actually book. You can cut the fixed cost, by consolidating two thin classes into one fuller one, which halves the instructor cost while keeping most of the attendance. You can accept the loss deliberately, because an early class anchors a member's week or a new format needs runway, and that is a legitimate strategic choice as long as it is a choice and not an accident. Or you can remove the slot and redeploy that instructor cost somewhere it converts.
None of this requires new pricing or a rebrand. It requires reading the schedule at the level where the money is actually made or lost, which is the individual class, not the month. The tools you already use to track attendance hold the data. Studio intelligence software like kaizenwell can surface contribution per slot automatically, but the discipline matters more than the tooling. Once you have seen your grid as a set of small P&Ls, you cannot unsee it, and the losers stop hiding behind a comfortable average.
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