Payment Due Date Calculator
Pick the invoice date and your payment terms (Net 30, Net 60, or anything custom) and this tool instantly works out the exact due date — plus how many days you have left, or how far overdue an invoice already is.
- Invoice date—
- Payment terms—
- Due date—
- Days remaining—
How payment due dates work
Payment terms set how long a customer has to pay after you invoice them. Net 30 means the balance is due 30 calendar days after the invoice date, Net 60 means 60 days, and Due on receipt means payment is expected straight away. This calculator simply adds the term length to your invoice date and shows the resulting deadline.
- Upcoming: the due date is still ahead — nothing to chase yet.
- Due soon: three days or fewer remain — a good moment to send a friendly reminder.
- Overdue: the deadline has passed — time to follow up.
Net 30, Net 60 and Net 90 explained
The most common business payment terms are expressed as Net plus a number of days. Net 30 gives the customer 30 calendar days to pay, Net 60 gives 60 days and Net 90 gives 90 days. Longer terms are common with large buyers and in industries with slow cash cycles, but they tie up your working capital for longer — every extra day on the term is an extra day you wait to be paid. Shorter terms such as Net 7 or Net 14, or "Due on receipt", keep cash moving faster. Whatever you choose, the due date is simply the invoice date plus the term length, which is exactly what this calculator works out for you.
When the clock starts and end-of-month (EOM) terms
Most invoices count the credit period from the invoice (issue) date, but some count from the delivery date or use end-of-month (EOM) terms. With "Net 30 EOM", the 30 days run from the last day of the invoice month rather than the invoice date, so several invoices raised in the same month share one due date. To model EOM terms here, set the invoice date to the final day of the month and then apply your Net term. Because banks may not process transfers on weekends or public holidays, many businesses treat the next working day as the practical deadline — this tool flags when a due date lands on a Saturday or Sunday.
Not sure which terms to offer, or how to phrase them? See our guide on payment terms explained.
FAQ
What does Net 30 mean?
Net 30 means the full invoice amount is due within 30 calendar days. "Net" refers to the total payable, and the number is the credit period. So Net 60 gives 60 days, Net 15 gives 15 days, and "Due on receipt" means payment is expected immediately.
When does the payment clock start?
By default the clock starts on the invoice (issue) date, so Net 30 means 30 days from the invoice date. Some businesses count from the delivery date or end of the month instead — always state the start point on your invoice so there is no ambiguity.
What if the due date falls on a weekend or holiday?
This calculator returns the exact calendar date. In practice many businesses treat the next working day as the effective deadline, since bank transfers may not clear on weekends or public holidays. If that matters, note it in your payment terms.
What does EOM (end of month) mean on payment terms?
EOM terms count the credit period from the end of the invoice month rather than the invoice date. For example, "Net 30 EOM" on an invoice dated 10 March is due 30 days after 31 March — i.e. 30 April. To replicate EOM here, set the invoice date to the last day of the month, then apply your Net term.
Is this calculator free?
Yes — it is completely free, runs entirely in your browser, and nothing you enter is sent anywhere or stored.