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Business Day Calculator

Net 30 Calculator - Find Your Payment Due Date

Last reviewed: May 19, 2026

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Enter your invoice date and get the exact Net 30 due date, with weekends and public holidays automatically excluded.

Net 30 traditionally means 30 calendar days. Most B2B invoices use this convention, and that is the default mode in the calculator below. If your contract specifies business days (common in some service agreements), use the toggle above the date input to switch modes. The difference is significant: 30 business days is roughly 42 calendar days, about 40% longer than 30 calendar days.

How Net 30 lands in each mode

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

Side-by-side timeline comparing 30 calendar days against 30 business days. Calendar days take about 4 weeks; business days take about 6 weeks because weekends and one holiday are excluded.
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?
Net 30 traditionally means 30 calendar days from the invoice date, which is the default mode in this calculator and matches most B2B invoice conventions. Some service contracts, especially in consulting, staffing, and legal work, explicitly specify “30 business days” instead. Use the toggle above the date input to switch modes; the calculator updates the due date in place. If you need to count days between two specific dates, use our business days between dates tool.
What does Net 30 mean?
Net 30 is a payment term indicating that full payment is due within 30 days of the invoice date (or sometimes the delivery date). It is one of the most common B2B payment terms, particularly for freelancers, agencies, and small business suppliers.
How do I calculate a Net 30 due date?
Enter your invoice date in the start date field, ensure “30” is in the days field, select your country for holiday exclusions, and the result shows the exact due date. You can also use the quick Net 30 button on our main business day calculator. If you meant a different term, check out Net 60 or Net 90.
What happens if Net 30 falls on a weekend or holiday?
When using business day mode, the calculator automatically skips weekends and public holidays, so the result will always land on a valid working day.
What is the difference between Net 30 and Net 30 EOM?
Net 30 EOM (End of Month) means payment is due 30 days after the end of the month in which the invoice was issued, rather than 30 days from the invoice date itself. It is common in retail and wholesale purchasing.
What is '1/10 Net 30'?
This shorthand means the buyer can take a 1% discount if they pay within 10 days; otherwise, the full amount is due in 30 days. Use this calculator twice: once with 10 days for the discount deadline and once with 30 days for the final due date.