Personal training is the line that turns a break-even gym into a profitable one. Its margin is higher than a standard membership, it consumes no extra floor space, and it measurably raises the odds a member renews because it creates a relationship with a person rather than a place. Yet at most gyms it is run on a notebook at reception and a WhatsApp thread between trainer and member.
The problem always shows up the same way: a member who bought a twenty-session package four months ago says six sessions remain, the trainer says three, and nobody holds a record that settles it. The fix is not a better memory or a tidier notebook — it is treating the package as what it actually is: a prepaid balance drawn down one session at a time.
Designing the package: three numbers, not one
Most gyms advertise one number — the package price — and leave the other two undefined until something goes wrong. A complete package needs three: the session count, the validity window, and the length of a session. The absence of the second is exactly what produces the member who reappears after eighteen months demanding sessions he paid for.
| Package | Validity | Price per session | Who it suits |
|---|---|---|---|
| Single session | One month | Full rate | A first trial and a trainer fit test |
| 8 sessions | Two months | 10% off | A short goal: an event, a trip, a restart |
| 16 sessions | Three months | 15% off | Usually the best-selling package |
| 32 sessions | Six months | 20% off | A member committed to two sessions a week |
Note that validity widens with package size but never disappears. A package with no expiry is not a generous offer — it is an open-ended liability on your books: sessions paid for today that must be delivered at any future date, at any future labour cost.
The balance: who deducts a session, and when
The one rule that ends every dispute: the session is deducted the moment it is delivered, by one known party, and recorded against the trainer who delivered it. Not at the end of the week, and not from somebody's memory on Thursday. Every deduction carries a date, a time and a trainer name, and the remaining balance becomes a number both sides can see instead of two competing claims.
- Purchase: the package is recorded against the member with its full balance and expiry date, and a receipt is issued for the amount paid.
- Booking: a slot is reserved with a named trainer, so the trainer's time is occupied and cannot be sold twice.
- Delivery: the session comes off the balance when the member checks in for it — at the door and automatically, not from somebody's memory on Thursday.
- Follow-up: watch the balance as it approaches zero. Two sessions left is the moment to talk about the next package — not the day it runs out.
Step four is what turns tracking from administration into revenue. A member who knows two sessions remain starts thinking about renewing; a member who does not know his balance discovers it has run out late and feels he lost money — which is not the feeling that precedes a second purchase.
Commission: on the sale or on the session delivered?
This decision shapes your team's behaviour more than any motivational meeting. Commission on the sale pays the trainer to close the deal and then lose interest. Commission on the session delivered pays him to actually deliver and to chase the member until the balance is used — which is precisely the behaviour that produces a repeat purchase.
The practical structure we see working: a small percentage at the point of sale, enough to motivate the offer, with the larger share earned as each session is delivered. For that structure to work at all, the delivered session has to be recorded against the trainer — the same record that settles the balance dispute. Which is why commission cannot be calculated accurately at a gym tracking sessions in a notebook: you are paying against numbers nobody can verify.
The three numbers worth reviewing monthly
Packages sold is a satisfying number and not a useful one on its own. Three numbers tell you something you can act on: the share of sold sessions actually delivered — if it is low you are selling packages that never happen and refund requests are coming; the repurchase rate after a package ends — the real measure of a trainer's quality; and sessions delivered per trainer per week — which tells you whether you need another trainer or have one without enough work.
All three derive from the same record that deducts the sessions, and that is the practical difference: when every deduction is dated and tied to a member and a package, these questions become answerable at all — instead of assembled by hand from three notebooks at month end.