Payment Due Date Calculator

Net terms say how long the customer has to pay the full amount. Net 30 means payment is due 30 days later, Net 60 is 60 days, and any number works the same way. Enter the days and the calculator adds them to the base date. The part that causes arguments is not the 30. It is thirty days from what. The default assumption is the invoice date, and that is what this calculator uses. But agreements variously run the clock from the date goods were delivered, from the date the invoice was received, or from the date the invoice was approved by the customer's accounts payable process. Those can differ by a week or more. An invoice dated the 1st, emailed on the 5th, and approved on the 12th produces three different Net 30 dates. When a supplier and a customer each think the other is wrong about a due date, this is usually why — so set the base date to whichever event the contract names, not automatically to the invoice date.

Most net terms count calendar days, weekends and holidays included. Some contracts — and quite a few public-sector payment rules — count business days instead, which always pushes the date later. The gap between the two grows fast, because every seven calendar days contains only five business days. Net 30 in business days is roughly 42 calendar days: six weeks rather than four and a bit. Over a Net 60 term the difference is close to a month. So the switch on this calculator is not a detail. Getting it wrong in your favour means chasing a customer who is not actually late; getting it wrong against you means paying weeks earlier than you had to.

The calculator reports the weekday precisely so you can catch a due date falling on a Saturday or Sunday. In practice, most parties treat the next business day as the operative deadline, and many contracts say so explicitly — but not all do, so it is worth checking rather than assuming. Public holidays are the bigger trap, because this tool cannot know them. In business-day mode it skips weekends only. If a federal holiday sits inside your term, the real due date is a day later than the calculator says. When a holiday falls on a weekend, the federal convention observes it on the adjacent Friday or Monday, removing a working day you were counting on. Then there is the difference between paying and the money arriving. Bank transfers only settle on days the banking system is open, and cheques deposited near a weekend or holiday can take longer still to clear. A payment initiated on the due date is not the same as a payment received on the due date — build a buffer of a couple of business days if the contract measures receipt.

Not all terms are a plain count of days from an invoice. Two common variants bunch due dates onto predictable dates instead. Net 30 EOM ("end of month") runs the 30 days from the last day of the month the invoice was issued, not from the invoice date. An invoice dated the 3rd and one dated the 28th of the same month then share a due date. 10 MFI ("month following invoice") means payment is due on the 10th of the next month, whatever day the invoice carried. Both exist because they suit the payer's payment runs, and both quietly extend the average term. Net 30 EOM gives an invoice dated the 3rd roughly 58 days to pay. If your terms use one of these, work out the anchor date first — the end of the month, or the fixed day of the following month — and use that as the base date here rather than the invoice date. Also watch for Due on receipt, which means exactly what it says and gives you no float at all.

Terms written as 2/10 Net 30 offer a 2% discount if you pay within 10 days, with the full amount due at 30. Whether to take it is an arithmetic question, and the answer is usually yes by a wide margin. Paying early buys you a 2% saving in exchange for giving up 20 days of holding your own cash. Annualize it: (0.02 ÷ 0.98) × (365 ÷ 20) ≈ 0.37, roughly 37% a year. Almost no business borrows at 37%, so declining the discount to hold cash for 20 more days is expensive. Read from the other side, offering 2/10 Net 30 to your customers is a costly way to accelerate collections — worth it if you genuinely need the cash sooner, painful as a permanent habit. Either way, run the two dates through this calculator so the discount deadline and the net deadline are both on the calendar, because the discount window is short and unforgiving.