But this operation itself does not generate interest.
The loan interest of regular banks is calculated according to this principle:
You have more principal in the bank. How many days have passed since you paid back the money last time, and how much interest have you generated these days? This is called "accrued interest", so you will still have so much interest when you pay back the money this time. Together with the agreed principal part, the two parts add up to the repayment amount in this period. Suppose you haven't paid off once (that is, you owe it for a month), then the principal and interest of that time should have arrived at the bank, but you still have it, so this part itself needs to calculate the interest according to the above principles, but because you have breached the contract, you usually have to add a penalty interest rate, for example, adding 5% to the original loan interest rate, so suppose your loan contract interest is 6%. Then the interest owed for the first installment is 6%+5%, that is, (the principal and interest owed for the first installment * (contract interest%+overdue interest rate difference%) * how many days/days are overdue), but I heard from a person I know in a city commercial bank that the calculation of penalty interest in the mainland is darker than these international practices in Hong Kong.
As can be seen from the above, for example, tomorrow is the repayment date, and the day after you pay off the current repayment, you only owe the bank principal, not interest, because you haven't paid off the last installment for one day. At this time, we will pay off the principal in advance to settle the loan, depending on whether the bank charges for "prepayment". This kind of "prepayment" is different from "partial prepayment", and some prepayments can only be repaid.
Calculation formula of interest: principal x annual interest rate x days/benchmark value of days in a year.
If the loan is US$ 6,543,800+,which is very common in Hong Kong, the annual interest rate is 4.5%, and the number of days in a year calculated in US dollars is 360. That is to say, if the annual interest rate is converted into a daily interest rate of 4.5%/360, after 25 days:
100000 * 4.5 * 25 / 100 / 360
The benchmark of RMB days in China used to be 360, but banks can make their own arrangements. Judging from the history of state-owned enterprises, it is estimated that it is still 360, and the RMB in Hong Kong is 360.
The rest is that you call the bank directly and ask if there is any charge.