Invoice Due Date Calculator (Net 15, Net 30, Net 60)

Pick the invoice date and the payment terms, and this free calculator tells you the exact due date. It works for Net 7, Net 14, Net 15, Net 30, Net 45, Net 60, Net 90, due on receipt, or any number of days you choose.

Used when you choose Custom
Payment due on
Days from today
Note

How it works

The due date is the invoice date plus the number of days in your payment terms. Net 30 means payment is due 30 days after the invoice date. Due on receipt means the invoice date itself.

The calculator counts calendar days, including weekends and public holidays, which is how most invoices are worded. If your contract counts working days only, check how it defines them.

Worked example

An invoice dated 1 October with Net 30 terms is due on 31 October. The same invoice with Net 15 is due on 16 October.

Tips

  • Write the exact due date on the invoice, not only “Net 30”, so there is no confusion.
  • Shorter terms improve your cash flow. See Net 15 vs Net 30 for how to choose.
  • Make your invoices with the free invoice generator, which fills in the due date field.

Frequently asked questions

What does Net 30 mean?

Payment is due within 30 days of the invoice date.

Does the clock start when I send the invoice or when the client receives it?

It usually starts from the invoice date, unless your contract says otherwise.

Do weekends count?

This calculator counts every calendar day. Your contract may define terms differently.

More free tools: Invoice generator · Late fee calculator · All free tools

This calculator is for general guidance only. Check important figures yourself.