[bingo3131]

No idea how it works in other countries but in the UK there are fixed-rate mortgages and variable-rate mortgages. Fixed rate ones are where the interest rate is locked in at the time the mortgage is taken out so any changes to the national base rate (positive or negative) do not change how much you have to repay, variable-rate mortgages are when the interest rate will fluctuate as the national base rate rises and falls.

Fixed-rate mortgages are time-limited (typically between 2-5 years) and after that you either switch to a variable rate mortgage or you take out a new fixed-rate mortgage based on the interest rates at the time.

People that bought properties just before COVID got dirt-cheap fixed-rate mortgages as the Bank of England base rate was 0.5%. Anyone sensible locked it in for 5 years which is typically the maximum available. After those 5 years were up, the base rate was about 5% which is a huge jump. I think most people have locked theirs in for 2 years now in the hopes that in a couple of years the base rate will be much lower.