Payment terms

Supplier payment terms, worked out

What each term means, when the money is due, and what an early-payment discount is really worth. Every page has a calculator.

Net terms

The full amount is due a set number of days after the invoice date.

Early-payment discounts

A percentage off for paying inside a short window, otherwise the full amount on the net date.

Month-based terms

Counted from the end of the invoice month, or due on a set day of the next month.

Cash terms

Paid on receipt, on delivery or before the order ships.

What skipping a discount costs

Not taking an early-payment discount is the same as borrowing the invoice amount from the supplier for the extra days. The simple annual rate is d/(1 − d) × 365 / (net days − discount days). If your own cost of funds is lower, the discount is usually worth taking.

TermExtra daysSimple annual rateCompounded
3/10 Net 302056.4%74.3%
2/10 Net 302037.2%44.6%
2/10 EOM2037.2%44.6%
2/15 Net 453024.8%27.9%
2/30 Net 603024.8%27.9%
1/15 Net 301524.6%27.7%
2/10 Net 453521.3%23.5%
1/10 Net 302018.4%20.1%
2/10 Net 605014.9%15.9%
1/10 Net 60507.4%7.6%

Where terms cause overpayments

Terms rarely cause a loss on their own. The money goes when the term in the ERP differs from the supplier's invoice, when a discount is taken after its window and the supplier later bills the difference, when a statement or reminder is paid as well as the original invoice, and when the same supplier sits in the vendor list twice with different terms. Each of these leaves a payment that can be found in the AP history and asked back.