Cancelling keeps the deposit, however early; where force majeure is accepted it becomes credit, and a session ended early at your request earns nothing back.
Couples cancel for couples' reasons: work calls one partner home early, an argument on the second day, a train strike that pushes the trip back. The house treats all of them the same way, and it is easier to plan a special evening knowing that from the start.
Once the office has accepted a booking and the deposit is settled, it is not returned on cancellation, whether you cancel a month ahead or an hour ahead. There is no sliding scale, no twenty-four-hour cut-off and no partial refund for giving notice. The cost was incurred at acceptance: the booking was confirmed, the therapists' time was locked, other requests for those hours were declined, and travel and coordination were arranged. For a couple with two therapists, that is two diaries closed. None of it unwinds when plans change.
Only two situations are considered: the authorities banning operations outright, or an illness serious enough to rule the session out. Each is looked at case by case. Where one is accepted, the money turns into credit for a future date, never into cash. A clash in either partner's diary, a work call that overran, a mild cold, a rebooked flight or a change of heart all fall outside it.
If a booking was accepted without a deposit, say a returning client or a therapist already on the road, and it is then cancelled, the same costs have been committed. So the office requests a cancellation-collateral payment, sized to match the half a deposit would have covered.
Ending before the booked time, at your end, brings back neither the whole fee nor any share of it. A therapist is also free to end it immediately, again with nothing returned, whenever her safety or consent is at stake.
Services bought remotely usually come with fourteen days to withdraw, by virtue of the Wet Koop op Afstand, the Dutch rules that put the EU Consumer Rights Directive into effect. The Dutch Civil Code, at Article 6:230p, carves out services tied to a specific date or time window, the date-specific-service exemption. An evening fixed to a particular hour on a particular day is one of those, which means the fourteen days never come into being and the house policy decides. Read the full cancellation policy before confirming, and see the deposit entry for amounts.