DueDateWhat Net 30 means
"Net 30" is a payment term that means the full invoice amount is due 30 days after the invoice date. Unless the contract says otherwise, those are calendar days: weekends and holidays inside the 30 days still count. The invoice date itself is day 0, so an invoice dated the 1st of a 31-day month is due on the 31st.
The only place weekends and holidays usually matter is the final date. If day 30 lands on a Saturday, Sunday or bank holiday, many businesses treat the next business day as the due date, because a payment cannot settle that day. This calculator calls that rule "move to next business day" (also known as the following convention). You can switch it to "previous business day" or turn adjustment off if your contract requires it.
Worked examples (United States holidays)
- Invoice dated Monday, November 2, 2026: 30 calendar days later is Wednesday, December 2, 2026. That is a business day, so no adjustment is needed. Veterans Day and Thanksgiving fall inside the period but do not change a calendar-day term.
- Invoice dated Tuesday, October 27, 2026: 30 days later is Thursday, November 26, 2026, which is Thanksgiving Day. With the next-business-day rule the due date becomes Friday, November 27, 2026.
The calculator above is prefilled with the second example. Change the invoice date, country or state to see how the result moves.
Net 30 vs. Net 30 business days
Some contracts say "Net 30 business days" or "Net 30 BD". That is a different calculation: you count only weekdays that are not holidays, so the due date ends up roughly six weeks after the invoice date instead of about a month. If you need that version, type Net 30 BD in the payment term box. For counting workdays in general, see the business days calculator.
Other common terms
Net 15, Net 45, Net 60 and Net 90 work the same way with a different number of days. "EOM" terms count from the end of the month instead of the invoice date; see EOM payment terms explained. Early-payment discounts such as 2/10 Net 30 add a discount deadline; see the 2/10 Net 30 calculator.
The same calculation is available as a JSON API, so you can run it inside an accounting, ERP or workflow system. Get a free API key (1,000 requests a month) or read the OpenAPI spec.
Holiday data comes from an open-source dataset and may be incomplete, especially for regional, ad-hoc or newly declared holidays. Check legally or financially critical deadlines against an official source.
Frequently asked questions
Does Net 30 include weekends?
Yes. Net 30 normally means 30 calendar days, so weekends and holidays inside the period count. Only the final due date is commonly moved if it lands on a non-business day.
Is the invoice date counted as day 1?
No. The invoice date is day 0, and day 30 is the due date. An invoice dated November 2, 2026 is due December 2, 2026.
What happens if the Net 30 due date falls on a holiday?
Under the common next-business-day convention, the due date moves to the next day that is not a weekend or public holiday. Your contract may specify a different rule.
Is Net 30 the same as 30 business days?
No. Net 30 business days (Net 30 BD) counts only working days, so it ends roughly six weeks after the invoice date.