Invoice due date calculator
Pick the invoice date and your payment terms. See exactly when the invoice is due — and how far away that is.
"Net" terms count calendar days from the invoice date. Some businesses count from delivery or month-end instead — check what your terms actually say.
The due date is only half the job
Knowing when an invoice is due is easy. Remembering to follow up on the dozen that quietly slipped past their date is the hard part — and it's where most of the money gets stuck.
PayNudge watches each invoice's due date for you and sends a gentle reminder sequence — before due, on due, and after — then stops the instant the client pays. The due date becomes something the software acts on, not something you have to track.
Questions about invoice terms
How do I calculate an invoice due date?
Take the invoice date and add the number of days in your payment terms. 'Net 30' means payment is due 30 calendar days after the invoice date. This calculator does that math and tells you the exact date.
Does Net 30 mean 30 business days or calendar days?
Net 30 almost always means 30 calendar days, not business days, counted from the invoice date. If you mean business days or count from delivery or month-end, state that explicitly in your terms to avoid disputes.
What's the difference between Net 15, Net 30, and Due on Receipt?
They're just different windows: Due on Receipt means pay now, Net 15 means within 15 days, Net 30 within 30 days. Shorter terms get you paid faster; longer terms can win larger clients who expect them.
When should I send the first reminder?
A gentle reminder a few days before the due date catches honest oversights, and a follow-up shortly after the due date handles the rest. PayNudge can send that whole sequence automatically based on each invoice's due date.