They've already paid before they open the door.

Pupils buy blocks themselves, on their phones

You set up the packages you sell — ten hours, twenty, an intensive — and they appear in your pupils' portal. A learner buys one on their phone, pays by card through Stripe, and the hours land on their balance. You were not involved. You did not have to ask.

For a lot of instructors this is the single biggest change, and not for the reason they expect. The money arriving earlier is useful. Never having to raise the subject is what they actually notice.

The pupil who has paid turns up

Pre-payment is usually sold as a cash-flow feature. Its more valuable effect is on cancellations. Someone paying per lesson loses nothing by pulling out on a Sunday night — someone who bought ten hours in advance is spending their own money by not being there. A block booking quietly does the job that reminder texts are trying and mostly failing to do.

For everything else, a link they can tap

Not everyone will pre-pay, and some pupils will always pay in cash. Outstanding invoices get a payment link that opens the invoice directly — no login, no password reset at 9pm, no reason to put it off. Cash, bank transfer and cheque can be recorded against the balance too, so the ledger reflects reality however the money turned up. Invoices, payments, package balances and outstanding requests all sit in one view, which means 'who owes me what' stops being a thing you carry around in your head.