Invoice due date guide
Net 30 due date business days
Net 30 due date business days can mean different timelines depending on the wording. This page explains what Net 30 means, how to exclude weekends and holidays when required, and how to use an invoice due date calculator to test scenarios for accounts payable and accounts receivable teams.
Published: December 28, 2025 · Updated: December 28, 2025 · By FinToolSuite Editorial
Disclaimer
- Educational purposes only; not legal, tax, or accounting advice.
- Examples are illustrative and simplified.
- Results depend on your inputs and assumptions and are not guaranteed.
- See the Privacy Policy; do not share personal financial data.
Quick answer: net 30 due date business days
- Net 30 usually means payment is due 30 days after the invoice date, but the wording matters.
- If your policy uses business days, exclude weekends and holidays because they move the due date.
- Use the calculator to test scenarios and document assumptions for your AP and AR teams.
What Net 30 means in plain English
Net 30 describes when payment is expected: typically 30 days after the invoice date. Some contracts treat “days” as calendar days. Others say “business days” or define weekends and holidays separately. Always check the contract or invoice wording before calculating or sending reminders.
Why weekends and holidays matter
Thirty business days span more calendar time than thirty calendar days because you exclude weekends and holidays. Country holiday presets and company closure days can shift a Net 30 due date by several days. Checking the correct weekend pattern and holiday list avoids missed expectations.
Worked examples
Example A: Calendar vs business days
Inputs: invoice date Monday, add 30 calendar days → due on Wednesday; add 30 business days → due the following Monday.
Example B: Near a holiday week
Inputs: invoice date before a holiday week, add 30 business days with holiday preset on → due date shifts by the skipped holidays.
Example C: Reminder 5 business days before due date
Inputs: take the business day due date, subtract 5 business days with same weekend and holiday settings → reminder date for chasing.
Mini checklist for AP and AR teams
- Confirm whether “days” means calendar or business in your terms.
- Note the weekend pattern you applied.
- Confirm which holiday calendar applies (country or region).
- Add company closure days if relevant.
- Decide inclusive vs exclusive counting for reminders.
- Use the same settings for chaser reminders and due dates.
- Save the scenario and share assumptions with your team.
- Keep evidence of invoice date and receipt date if your process requires it.
How to calculate quickly with the tool
- Enter the invoice date as the start date.
- Choose add, then set 30.
- Select your weekend pattern.
- Select holiday preset and year if applicable.
- Run the calculation and save the result.
FAQ
Is Net 30 business days or calendar days?
It depends on the contract. Check the wording and follow it.
How do I calculate a Net 30 due date?
Start from the invoice date, set 30, choose weekend and holiday rules, then run the calculator.
Do weekends count in Net 30?
Only if your terms say calendar days. Business day terms exclude weekends.
Do holidays count in Net 30?
Not when the term is business days and holidays are excluded in your settings.
What is the difference between Net 30 and 30 business days?
Thirty business days usually extend further because weekends and holidays are skipped.
How can I set a reminder a few business days before due date?
Subtract the number of business days you want using the same calendar settings and schedule that date.
Can I use different holiday calendars for different customers?
Yes. Pick the preset for each customer’s region and add their closures as custom holidays.
Is this legal, tax, or accounting advice?
No. This page is educational. Confirm specifics with your advisor.