Invoice due date calculator

Enter the invoice date and the payment terms to see the day the invoice is due.

Free, no sign-up Runs in your browser: nothing you type is sent or stored
Enter a valid date.

A guide, not legal advice: check your contract's payment terms first.

How payment terms are counted

Net terms count calendar days from the day after the invoice date: an invoice dated 1 March on Net 30 is due on 31 March.

End-of-month terms start counting on the last day of the month the invoice was issued in: an invoice dated 10 March on 30 days end of month is due on 30 April.

If no payment terms were agreed, the law in the UK and the EU makes a business invoice due 30 days after the client receives it, or receives the work if that comes later.

Questions and answers

What does Net 30 mean?

That the invoice must be paid within 30 days of the invoice date. Net 60 and Net 90 work the same way, with 60 and 90 days.

Does the invoice date count as day one?

No. The count starts the day after the invoice date, so an invoice dated 1 March on Net 30 is due on 31 March.

What does 30 days end of month mean?

Usually that the 30 days start at the end of the month the invoice was issued in: an invoice dated 10 March is then due 30 days after 31 March, on 30 April. Some businesses count the 30 days from the invoice date and then go to the end of that month; this calculator has both options.

What if the due date falls on a weekend?

It depends on your contract and your country. Many businesses move it to the next working day; tick the weekend option to see that date.

More free tools

These tools handle one invoice. GoCons handles them all.

Contracts, renewals, billing schedules and a portal where your clients follow the work.

Create your free account
Free plan, no card needed
Founding offer: 50% off your first 12 months. Limited time offer!