Depends on interest.

I will give an example.

I have a friend in Spain that has a mortgage.
His mortgage is at rate Euribor+0,5%
Meaning around 1,8% nowadays.

The bank is offering him a savings account with 3% yearly.

Lets imagine he has some saving: 10,000.00 EUR.

What do you think is better? overpay the mortgage or deposit in saving account?

Obviously, in this case, it is better to put in saving account; but always depends on rates.

BTW - rates for credit cards are crazy, I always pay full at the end of the month.

War looking for peace,
is like fornication looking for virginity.