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Business Day Calculator

Net 30 Calculator - Find Your Payment Due Date

Last reviewed: October 14, 2026

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Enter your invoice date and get the Net 30 due date, counted in calendar days or, if your contract says so, in business days that skip weekends and the public holidays of the country you select. The holiday calendars cover 2024 to 2029; for a date in another year the calculator shows a notice and that year's holidays are not skipped.

This calculator reads Net 30 as a payment period of 30 days and counts it in calendar days by default, starting the day after the invoice date. If your contract specifies business days, use the toggle above the date input to switch modes. The difference is large: on a five-day week with no holiday in the window, 30 business days counted from an invoice dated on a working day end 42 calendar days later, 40% longer than 30 calendar days. Israel is counted on a six-day week here, Sunday to Friday, so the same count ends sooner; picking Sunday to Thursday under Working week counts it on a five-day week instead. Each public holiday on a working day inside the window pushes the due date to the next business day: at least one calendar day later and, when a weekend lies in between, three or more on a five-day week and two or more on Israel's six-day week.

Sources for these rules

Checked October 13, 2026. All sources

How Net 30 lands in each mode

Calendar-day mode counts every day on the calendar. Business-day mode skips weekends and the public holidays in the calendar of the country you select. The two timelines below show how the same invoice date lands on different due dates depending on which mode you choose.

Example using the United States holiday calendar

Invoice dated Monday, August 3, 2026

30 calendar days

Due Wed, Sep 2

30 business days

Due Tue, Sep 15
  • Counted day
  • Weekend, skipped
  • Public holiday, skipped

Counted in calendar days, Net 30 is due on September 2, 2026. Counted in business days it is due on September 15, 2026, 43 calendar days after the invoice date, because 12 weekend days and 1 public holiday (Labor Day) are skipped.

United States holiday dates: U.S. Office of Personnel Management (opm.gov) (opens in a new tab), reviewed July 20, 2026.

Net 60 Calculator →Net 90 Calculator →Invoice Due Date Calculator →SLA Deadline Calculator →Late Payment Interest →

For informational purposes only

This calculator provides general estimates based on business day counting rules. It does not constitute legal advice. Deadlines in legal, regulatory, or contractual matters may be subject to jurisdiction-specific rules, court orders, or statutory exceptions. Always verify critical deadlines with a qualified professional.

Frequently Asked Questions

Does Net 30 mean 30 calendar days or 30 business days?
It depends on the contract. This calculator counts calendar days by default, which is how it reads a bare ‘Net 30’, and switches to business days when you use the toggle above the date input; the due date updates in place. If the contract says “30 business days”, use business-day mode. If you need to count days between two specific dates, use our business days between dates tool.
What does Net 30 mean?
This calculator reads Net 30 as a payment period of 30 days. It counts from the date you enter, so enter the date your contract counts from, whether that is the invoice date or a delivery or receipt date.
How do I calculate a Net 30 due date?
Enter your invoice date in the start date field, make sure “30” is in the days field and, in business-day mode, select your country so its holidays are skipped; the result shows the due date. The Net 30 button on our main business day calculator fills in 30 days and today’s date; replace the date with your invoice date. If you meant a different term, check out Net 60 or Net 90.
What happens if Net 30 falls on a weekend or holiday?
In calendar-day mode the calculator shows the 30th calendar day as it falls, even on a weekend or public holiday, and does not move it; whether a payment due that day may be made on the next business day depends on the contract and the law that governs it. The invoice due date calculator flags such a date and shows the next business day. In business-day mode the count skips weekends and the selected country's public holidays, so the result always lands on a business day of that calendar.
What is the difference between Net 30 and Net 30 EOM?
Net 30 on this page counts 30 days from the invoice date. In the invoice due date calculator, Net 30 EOM (End of Month) counts the 30 days from the last day of the month the invoice is dated in: an invoice dated March 15 is due April 30 on Net 30 EOM and April 14 on Net 30. Contracts word month-end terms differently, so check where yours starts the count.
How do I find both dates on terms like '1/10 Net 30'?
If your terms give a 1 percent discount for payment within 10 days and ask for the full amount within 30, run this calculator twice: once with 10 days for the discount deadline and once with 30 for the due date. The invoice due date calculator shows the discount deadline beside the due date in one step.