How much can I expect the credit score to increase in a month after paying back debts?

A month or two after the creditor reports that your balances have been paid off, your credit score will increase significantly and quickly.

So, you can hope for the best in the next few months.

Your credit score depends on a lot of factors. However, you can expect an increase after a few months if there are no negative items on your credit report.

Your milage will vary...no one can predict how scores go up and down.