We apply two pricing models, choice between which is agreed with the client.
One is a flat hourly rate (for 2017, starting from 17€/hour). We discuss in the beginning an estimate of what time the agreed amount of work might take.
Another is an agreement on a lump sum for the work (that again will include the VAT).
We invoice the client, if nothing else is agreed, either when the work is completed or when a number of hours (e.g. 15 ) have been consumed - whichever comes first.