This is a question we get asked to allot. The answer is no, but…
Check is your current rate, if you are on a fixed rate and are looking to switch lender before it’s due to end there may be a break fee to get out the fixed rate. It should be on a sliding scale though.
Other than this you cannot be penalised for looking to switch mortgage provider. This includes anyone who has gotten a ‘cashback mortgage’.
If you received cashback as part of your original mortgage, you do not have to pay any of this money back when switching.