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Invoice Due Date Calculator
Work out the due date from any payment terms, including the EOM ones people get wrong.
Quick Tool Overview
The Invoice Due Date Calculator works out when payment is due under twenty-four sets of terms, including the end-of-month ones people read wrong — Net 30 EOM from 3 March is 30 April, not 2 April — and handles the weekend question most terms are silent about.
- What it does
- Turns payment terms into a due date
- You give it
- The invoice date and the terms
- You get back
- The due date, the days allowed and any discount deadline
- Best for
- Setting terms and checking somebody else’s
About the Invoice Due Date Calculator
Net 30 is easy. It is the other terms that produce arguments, and almost always the same one: "Net 30 EOM" counts thirty days from the end of the month the invoice was issued in, not from the invoice date — so an invoice dated 3 March is due on 30 April, and chasing it on 2 April makes you look like you cannot read your own terms.
This works out the due date for twenty-four sets of terms: plain net terms from 7 to 120 days, end-of-month terms, the "10th, 15th or 25th of the following month" forms used across European retail, cash in advance, cash on delivery, and settlement-discount terms such as 2/10 Net 30 — which also tells you the last day you can take the discount and what it is worth.
It handles weekends properly too. Most terms are silent about them and most finance departments run their payment run on a working day, so a due date landing on a Sunday is really a Monday or a Friday depending on who is chasing whom.
Key features of the Invoice Due Date Calculator
Twenty-four sets of terms
Net terms, EOM, day-of-next-month, advance and settlement discounts.
EOM done correctly
The single most misread payment term, worked out properly.
Weekend handling
Push to Monday, pull back to Friday, or leave it where it falls.
Settlement discount deadline
The last day to take it, and what it is worth.
Every term compared
The same invoice date under each set of terms, side by side.
How to use the Invoice Due Date Calculator
-
1
Enter the invoice date
The issue date, or the tax point if your terms run from that.
-
2
Choose the terms
Net terms, end of month, day of the following month, or a settlement discount.
-
3
Decide about weekends
Push to Monday, pull back to Friday, or leave the date where it falls.
-
4
Read the dates
The due date, the days it allows, and any early-settlement deadline.
-
5
Check the calendar view
Every common set of terms from the same invoice date, side by side.
Frequently asked questions
Payment is due thirty calendar days after the invoice date. Not thirty working days, and not from the end of the month — those are different terms with different names.
Thirty days from the end of the month in which the invoice was issued. An invoice dated 3 March is due on 30 April, not 2 April. It is the single most commonly misread payment term.
A 2% discount if the full amount is paid within ten days, otherwise the total is due in thirty. The effective annual return on taking the discount is very high, which is why buyers with cash almost always take it.
Most terms are silent, and practice varies. The common convention is that payment is due on the next working day. Saying which you mean in your terms removes the argument entirely.
You can if your terms say so, and this calculator will show you the working-day count either way — but calendar days are the overwhelming convention and are easier for both sides to verify.
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