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SAP B1 Early Payment Discount Calculator (2/10 Net 30)

A 2 percent discount for paying ten days early sounds small, but it is worth well over 30 percent annualized. This calculator quantifies it against your cost of capital so accounts payable can decide which supplier terms to take and which to ignore.

Your numbers

Invoice amount

Early payment discount

Discount period

days

Net due days

30 days

Your annual cost of capital

Borrowing rate on your credit line or your target return on cash.

Your results

Annualized return of taking discount

37.2%

Simple annualization: discount / (100 minus discount) x 365 / days of credit given up.

Net benefit of taking the discount

$758

Discount value

$1,000

Amount paid if you take it

$49,000

Days of credit given up

20 days

Cost of paying early (interest on cash)

$242

Simple interest approximation. Ignores tax effects and supplier relationship considerations.

Save results:

Annualized return versus net due days

Sweeps Net due days from 15 to 120, holding your other inputs fixed.

Payment timing review

Optional analysis of open payables and payment terms to find discounts worth capturing.

Optional. The tool and every export work without this. No spam.

How to use it

Enter the invoice amount, the discount offered, the discount period and the final due date. Add your annual cost of capital, either the rate on your credit line or the return you earn on cash. The tool tells you the implied annual return and the money gained or lost by paying early.

The formula

Annualized return = discount / (100 minus discount) x 365 / (net days minus discount days). For 2/10 net 30 that is 2 / 98 x 365 / 20, about 37 percent. Net benefit = discount value minus the interest you forgo or pay on the cash for the extra days. Anything where the annualized return beats your cost of capital is worth taking.

Longer net terms raise the annualized return
Smaller periods of credit given up raise it too
Compare it with your actual marginal funding cost

Using it with SAP Business One

SAP Business One payment terms can carry a cash discount percentage and discount days, and the payment run or incoming and outgoing payment screens can apply it when you pay within the window. Use this tool to decide which suppliers deserve those terms set up and which payment runs should be timed to catch them.

Common mistakes

Comparing the discount to a monthly rate instead of an annual one, ignoring that paying early on all invoices needs working capital, taking discounts after the window closes, and stretching payment so far that suppliers retaliate with price or availability. Treat the output as one input, not the whole answer.

Frequently Asked Questions

Is 2/10 net 30 always worth taking?

If your cost of capital is below roughly 35 percent, yes in pure financial terms. The constraint is usually cash availability, not the rate. If you must borrow at high rates or cash is tight, reevaluate.

How do I read terms like 1/15 net 45?

It means a 1 percent discount if paid within 15 days, otherwise the full amount is due in 45 days. Enter 1 for discount, 15 for discount days and 45 for net days.

Does it consider compounding?

No, it uses simple annualization, which is the convention in textbooks and supplier terms analysis. The effective compounded rate is higher, so the decision rarely changes.

Can suppliers cut my discount unilaterally?

Discounts apply under agreed terms. Taking one after the window closes is a dispute risk and creates reconciliation noise, so align payment runs to the cut-off dates.

If you want payment timing optimised from your open payables in SAP Business One, Netray can help. This calculator works without any contact.

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