Free date tool
Invoice Due Date Calculator
Work out the calendar due date from an invoice issue date and the payment terms you choose. This is a date calculation only; it does not decide the contractual terms between the parties.
Calculate an invoice due date
Use the agreed payment term in calendar days.
Calculated invoice due date
Enter the requested dates to calculate this result.
This tool adds calendar days only. It does not interpret a contract, public-holiday policy, or legal notice rule.
How to use this tool
- 1Enter the invoice issue date.
- 2Enter the agreed payment term in calendar days.
- 3Copy the due date into the invoice after checking the agreement and any public holiday policy.
Frequently asked questions
Does this tool include public holidays?
No. It adds calendar days. Check the agreement and the parties' payment policy if a due date that falls on a weekend or public holiday needs a different treatment.
Does a calculated date change my invoice terms?
No. The payment terms in the parties' contract, purchase order, or accepted invoice control. This tool only helps calculate a date from the inputs you choose.