Invoice due date
An invoice due date is the calendar date by which the customer is expected to pay under the agreed payment terms. It is commonly calculated from the invoice date, but a contract may use another starting point, such as delivery or acceptance. Showing the date explicitly helps avoid ambiguity about shorthand such as Net 30.
Why this matters when you invoice
A visible due date gives the customer a concrete deadline and makes follow-up simpler. It also prevents two people from applying the same shorthand differently.
Where it appears on an invoice
Place the due date near the invoice date, total due or payment instructions. If you also use Net 7, Net 14 or Net 30, display the resulting date beside it.
Invoice due date example
Invoice date: 3 September 2026. Payment terms: Net 30. Invoice due date: 3 October 2026. If the agreement uses a different starting event, calculate from that event instead.
Common mistakes
- Counting business days when the agreement says calendar days.
- Calculating from the wrong starting event.
- Showing only shorthand and making the customer calculate the date.
Put the term into practice
Use the calculator to turn the agreed payment term into a calendar date, then copy the reviewed date into your invoice.
This page explains common invoicing usage. Your contract and applicable local rules determine what applies to a transaction.
Frequently asked questions
Is the invoice date always the starting date?
Not always. It is common, but the contract or agreed terms may use delivery, receipt, acceptance or another event.
What if the due date falls on a weekend?
The correct treatment can depend on the agreement and local rules. Avoid silently changing it without checking what applies.