The payment term must be longer than the discount period for the effective annual interest rate to be calculated.
If you would have to borrow to pay early. 0 = from your own money.
Amount due with discount
€980.00
€980.00If you pay within 10 days, you pay €980.00 instead of €1,000.00 and save €20.00.
Of the invoice amount
The effective annual interest rate treats skipping the discount as a loan: you "borrow" the amount due for the days between the discount period and the payment term (banking year of 360 days).
What you can do
Effective annual interest rate if you skip the discount36.73%
If you do not take the discount, the 20 days of extra payment time cost you the equivalent of 36.73% interest per year.
Cash Discount Calculator by Rechnerzentrale(opens in a new tab)