The costs related to the old mortgage
You will have to pay the early cancellation fee applied by the bank where you took out the mortgage. The amount will depend on the type of mortgage, the date when you signed the agreement and the stage reached in the mortgage term at the time of the transfer.
The costs related to the new mortgage
Under the terms of the 2019 mortgage act, you will only have to pay the new appraisal costs. All the other costs, such as the notary and stamp duty, etc., will be paid by the new bank.