Home › Free Tools › Free Invoice Due Date Calculator
Enter the invoice date and your payment terms and see the exact due date, the day it lands on, and how many days away it is — Net 15, 30, 60, 90 or any custom term.
Tap a Net term or type a custom number of days. "Net 30" means payment is due 30 calendar days after the invoice date.
“Net 30” sounds simple until a customer asks exactly what date their invoice is due — and you find yourself counting squares on a calendar. This free invoice due date calculator does it for you: enter the date on the invoice, pick your payment terms, and it returns the exact due date, the day of the week it falls on, and how many days away that is from today. No signup, no spreadsheet, nothing to install.
Payment terms like Net 15, Net 30, Net 60 or Net 90 mean payment is due that many days after the invoice date — not after you finish the work or after the customer opens the email. Net 30 on an invoice dated the 1st is due on the 31st. “Due on receipt” means payment is expected immediately, with no grace period. Tap a common Net term to set it, or type any custom number of days for the terms you actually use with a particular client.
A worked example: you invoice a customer on September 4 with Net 30 terms. The tool adds 30 calendar days — not business days — landing the due date on October 4, and tells you whether that date is still upcoming or already overdue relative to today. Because it counts calendar days, month lengths and weekends are handled automatically, so short months like February never quietly throw your math off.
Knowing the due date is only half the job; getting paid on time is the other half. StandupCRM sends invoices with the terms built in, nudges customers before the date, and flags anything overdue so you are not the one chasing. This free calculator is the quick, no-login way to check a single invoice before you send it — pair it with the late fee calculator to see exactly what a missed due date should cost.
Add your payment terms to the invoice date. For Net 30, count 30 calendar days forward from the date on the invoice — enter both above and this tool returns the exact due date instantly.
Net 30 means the full amount is due 30 days after the invoice date. Net 15, Net 60 and Net 90 work the same way with 15, 60 or 90 days.
Net terms are counted in calendar days — including weekends and holidays — unless your contract specifically states business days. This calculator uses calendar days.
Due on receipt means payment is expected immediately when the customer receives the invoice, with no grace period. Select "Due on receipt" (0 days) above.
Yes — it is free, needs no signup, and runs entirely in your browser. Nothing you enter is uploaded or stored.
StandupCRM gives repair shops Google Ads landing pages, lead capture, and a CRM dashboard — plus free tools like this to bring customers in.
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