Current mortgage just over £21k with 17yrs left. Interest rate is SVR of 3.99%, so monthly payments currently £145, no early repayment charges. Recently decided to start overpaying by £50 pm and mortgage provider said we can do one of 2 things - request regular recalculations of the mortgage so term remains the same but monthly payments go down or leave the account in credit which will go towards the balance and effectively reduce the term of the mortgage, also having the added benefit that if we ever needed to we could miss some payments.
If you've overpaid which did you choose? Is there one way that works out cheaper than the other? We are leaning toward the latter option because I would rather get it paid off quicker if we can. Any advice would be appreciated, we've never overpaid the mortgage before so am unsure of any potential pitfalls.