If your mortgage rate is 3%. That is £3,000.00 every year on each £100,000.00 you owe. If you owe £50,000.00 your interest is £1,500.00 per year divide that by 52 for a weekly amount or 365 for a daily amount.
so if you mortgage was £200,000 outstanding on 3.65% a year the interest would be £20 a day, £140 a week, or £7,300 per year.
it’s easier to break it down to daily rate, write down what little sacrifices/savings you have made that day and you can transfer it these days on the app. It can be quite addictive, and when you see the lump sum coming down, the interest does.
good luck, and if you don’t understand what I have written or maybe/probably it’s me not explaining it well enough, leave exactly what you are trying to work out.