We bought the house last year and got a 5 year fixed rate till 2027, given how rates have been so high recently I thought anything I could save I should overpay before the remortgage is due , so we are allowed to overpay up to 10% of the mortgage amount so I paid a lump sum few weeks ago . Now I did this online and the system automatically calculates the repayment amount and got an email saying it is now less by 100 pounds , now my question is this : before making the overpayment I went to natwest overpayment calculator and put the numbers in and it said if i keep the monthly repayment amount the same I would save more in the interest as the mortgage term would be less (it said about eight months to reduce ) however when I went and did the overpayment online there was no choice to reduce the term time , the computer automatically reduce the monthly repayment keeping the term as it is
i find it very confusing that the online calculator says one thing and what I got was another thing , I feel I am missing something here , could anyone who knows how this things works help please