Payment terms calculator
Turn an invoice date and payment term into a clear payment deadline.
Weekday mode skips Saturday and Sunday, but not public holidays.
Payment due date
Choose a date
Free to use · No signup · Calculations run in your browser
Choose calendar days for standard net terms or weekdays when your agreement explicitly uses working days. Always follow the starting event and counting method in the agreement.
Due date = agreed start date + payment-term days
With calendar-day counting, an invoice dated 1 September with Net 30 terms is due on 1 October.
Net 30 commonly means 30 calendar days, but the contract or customer process may specify business days or a different starting event.
Calendar-day mode includes every day. Weekday mode skips Saturdays and Sundays but does not apply country-specific public holidays.
Net payment terms
Add 30 days to an invoice date and find the Net 30 payment deadline instantly. Free calculator with no signup.
Net payment terms
Calculate the exact payment date for a Net 60 invoice. Enter the invoice date and get the due date instantly.
Overdue invoice calculator
Calculate late fees, overdue days, interest, and the updated balance for an unpaid invoice using your agreed payment terms.