Choose terms together
Confirm the payment window before work begins. If the contract counts from receipt or approval, use that starting date.
A little clarity, before you send.
Invoice due date calculator.
Net 30 is a number. Your client needs a date. Calculate it, copy the payment terms, and make the deadline clear.
Free to use · No signup · Calendar days01
Start with your invoice.
The date the agreed payment window starts.
0 means due on the invoice date. Choose a whole number from 0 to 365.
Your payment deadline
Enter a valid invoice date and 0–365 payment days to see the deadline.
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Put it in writing.
Your payment wording will appear here after you choose a valid date and payment window.
Add your agreed payment method and details before sending.
Same invoice. Different deadlines.
What do Net 7, 15, 30, 60 and 90 mean?
“Net” followed by a number gives the payment window. These examples count from an invoice dated October 18, 2026.
Count the invoice date as day zero, then add the agreed days. Net 30 means 30 calendar days, which can be different from one calendar month.
| Term | Days | Due date |
|---|---|---|
| Net 7 | 7 | October 25, 2026 |
| Net 15 | 15 | November 2, 2026 |
| Net 30 | 30 | November 17, 2026 |
| Net 45 | 45 | December 2, 2026 |
| Net 60 | 60 | December 17, 2026 |
| Net 90 | 90 | January 16, 2027 |
Before the invoice leaves your hands.
Show the actual date
Write both the agreed term and the due date. Include the payment method and invoice number as a reference.
Make the invoice
Use CatInvoice’s free invoice generator to add your work, prices and payment notes, then download your PDF.
Need wording for deposits or milestone payments? Read the freelance payment-terms guide. Or follow the invoice checklist and worked example. After sending, record payments in the free invoice tracker spreadsheet.
The details, explained.
Invoice due date questions
How do you calculate an invoice due date?
Add the agreed number of calendar days to the invoice date. For an invoice dated October 18, 2026, Net 30 gives a due date of November 17, 2026. The invoice date is day zero.
Does Net 30 mean calendar days or business days?
This calculator counts calendar days, including weekends. If your agreement specifies business days or starts the clock from receipt or approval, use that agreement instead. The tool does not move a weekend deadline or apply public holidays.
Is Net 30 the same as one month?
No. Net 30 is 30 days, while a calendar month can have 28, 29, 30 or 31 days. An invoice dated January 31, 2026 with Net 30 terms is due March 2, 2026.
Can I copy these payment terms onto my invoice?
Yes. Copy the generated wording, add your agreed payment method and details, and review the due date before sending. Agree on payment terms with the client before the work starts.
Does this tool send reminders or collect payments?
No. It calculates dates in your browser and prepares text you can copy. It does not send messages, collect money or change your saved invoices.
Deadline sorted. Make your invoice.
No signup. No subscription. No watermark.