The balance on arrival is the part of the fee still owed once any deposit is paid, settled in person when the therapist reaches the room.
A booking here is paid in up to two parts. The first, where it applies, is the deposit, settled electronically before the therapist travels. The second is the balance, which is whatever remains of the ladder price, and it is settled face to face at the start of the session. For most bookings the balance is exactly half. For the one exception that carries no deposit, the balance is the whole fee.
Three methods are accepted at the door. Cash can be in euro, or in another major currency at an exact amount confirmed to you in writing before she sets out. Card is accepted. So is cryptocurrency. The client chooses, and mentioning the method in the thread beforehand avoids a pause when she arrives.
Cash is a balance method and only a balance method. It cannot serve as a deposit, because a deposit has to be in place before anyone sets out, and cash only exists in the room once she has arrived. The payment methods guide goes through the practical side of each option, including foreign notes.
Three short examples show it. A three-hour session with one therapist has half paid in advance and half due on arrival. One client with two therapists for three hours splits the same way on a larger fee, and so does a couple with two therapists for those three hours on a larger one again. A returning client booking one hour for tonight pays nothing beforehand and the whole of that hour at the door.
Because the balance falls due on arrival, it is dealt with at the start rather than the end. The session then runs without an administrative interruption, and money is discussed at a single moment. Visitors unsure about gratuities will find the local custom in the tipping guide. The full amount owed is always the figure in the rates table on the profile of the therapist you booked, and the cancellation policy explains how the advance half is treated.