Three conventions, three different dates
Net 30 sounds unambiguous until somebody counts from the end of the month, or from when they received the invoice rather than when you raised it, or skips weekends. All three are real conventions and all three land on different days.
Calendar days from the invoice date is the usual meaning of net 30 and the one to assume unless told otherwise. Business days only is used in some contracts and pushes a thirty-day term out by about twelve days. End of month means the clock does not start until the month closes, so net 30 EOM on an invoice dated the 2nd is nearly sixty days.
None of these is wrong. What is wrong is not knowing which one the other side is using, and finding out when you chase.
Net 7 to net 90 at a glance
For an invoice dated Thursday 1 October 2026, counting calendar days:
- Net 7: Thursday 8 October 2026
- Net 15: Friday 16 October 2026
- Net 30: Saturday 31 October 2026, so in practice Monday 2 November
- Net 45: Sunday 15 November 2026
- Net 60: Monday 30 November 2026
- Net 90: Wednesday 30 December 2026
- Net 30 EOM: the month ends on 31 October, so Monday 30 November 2026
Due on receipt means payment is expected when the invoice arrives, with no term at all. Once a date has passed, the days past due calculator shows how late it is.
Put the date on the invoice
Writing 'net 30' and leaving the reader to count is the single easiest way to be paid late without anybody being at fault. Print the actual date. It costs nothing, it removes the convention question entirely, and it gives you something specific to point at when you follow up.
Pick the convention you use and the date is worked out from it, with the day of the week shown, because a due date that falls on a Sunday is a due date that gets paid on Monday at best.
The 2/10 net 30 line
An early payment discount has its own deadline, counted from the invoice date, and it is shown here alongside the due date. Before offering one, check what it costs you as a yearly rate. The discount calculator does that arithmetic, and the answer surprises most people the first time.
Related calculators
- Business days calculatorWorking days added, subtracted or counted
- Days past due calculatorHow late it is, and what that age usually calls for
- Late fee calculatorThe fee, the letter and the clause
- Recurring invoice generatorEvery billing date and due date for a repeat invoice
Questions people ask
How do I calculate an invoice due date?
Add the payment terms to the invoice date. Net 30 means thirty calendar days from the invoice date unless your contract says otherwise, so an invoice dated 11 September is due on 11 October, and one dated 11 January is due on 10 February.
How do I work out net 30 from today?
Leave the invoice date empty or set it to today, keep the terms at 30 and calendar days, and the due date is shown with its day of the week. By hand, add thirty days: from a 30-day month it lands on the same date next month, from a 31-day month one day earlier, and from February two days later (one in a leap year).
What does net 30 EOM mean?
The thirty days start at the end of the month the invoice was issued in, not the invoice date. An invoice dated the 2nd on net 30 EOM is not due for nearly sixty days.
Do weekends count in net 30?
Normally yes: net terms mean calendar days unless the contract says business days. This page can count either way, because both conventions are in real use.
What if the due date falls on a weekend or a holiday?
Most businesses pay on the next working day, and most suppliers accept that. If it matters to you, set business-day terms so the due date never lands on a weekend in the first place.
Should the due date go on the invoice?
Yes, as an actual date. 'Net 30' asks the reader to count, and a reader who counts differently from you pays late without anyone being at fault.
What does 2/10 net 30 mean?
Two percent off if paid within ten days, otherwise the full amount is due in thirty. 1/10 net 30 is the same with one percent. The discount deadline is shown here; the discount calculator works out what offering it costs you over a year.
What does due on receipt mean?
Payment is expected as soon as the invoice arrives, with no term. It is common for small jobs and deposits. If you want a firm date to chase, net 7 gives the client a week and gives you a date to point at.
Is net 30 the same as 30 days net?
Yes. Both mean the full amount is due thirty days after the invoice date. Net 30 EOM is different: the thirty days start at the end of the month.