Overdraft vs Overpayment - What's the difference?

As nouns the difference between overdraft and overpayment

is that overdraft is (uncountable) the act of overdrawing a bank account while overpayment is payment exceeding the amount actually due.

(uncountable) The act of overdrawing a bank account.

(countable) The amount overdrawn.

I have an overdraft of £1234.

(countable) The maximum amount that may be overdrawn.

The bank have given me an overdraft of $2000.

(en noun)

Payment exceeding the amount actually due

The employer sued to recover overpayment of wages.