End of Month (EOM) Payment Terms Explained

A term such as Net 30 counts from the invoice date. An end of month term does not. It counts from the last day of the month the invoice is dated in, so two invoices dated three weeks apart in the same month can fall due on exactly the same day.

This guide shows how each written form of EOM resolves to a date, how far apart EOM 10 and Net 30 EOM always land, how long an invoice waits under each compared with Net 30, and what to check when the date falls on a weekend. The readings are this site's own: the ones its invoice due date calculator applies to Net 30, End of Month, Net 30 EOM and Net 60 EOM, carried over in the same way to EOM 10 and EOM 15, which the calculator does not offer. Your contract can define a term differently, and its wording is what binds you.

What EOM means

EOM stands for end of month. Read on its own, "payable EOM" makes an invoice due on the last day of the month in which it is dated. An invoice dated March 8 is due March 31, and so is one dated March 27: within the month, the invoice date does not move the due date. The End of Month term in the invoice due date calculator works this way.

Terms with a number of days

A number attached to EOM says how far past month-end the payment falls. This guide covers two written forms and reads them as follows:

• EOM 10: due on the 10th of the month after the invoice month. An invoice dated any day in April is due May 10. EOM 15 is the 15th.
• Net 30 EOM: 30 days counted from the last day of the invoice month. An April invoice is due 30 days after April 30, which is May 30. Net 60 EOM counts 60 days from the same point.

Both count from month-end, EOM 10 by 10 days and Net 30 EOM by 30, so for any invoice the two dates are exactly 20 days apart. What moves from month to month is the calendar date Net 30 EOM lands on: May 30 for an April invoice, but March 2 for a January 2026 invoice, because February 2026 has 28 days. The invoice due date calculator has End of Month, Net 30 EOM and Net 60 EOM as term types; for EOM 10 or EOM 15, take the last day of the invoice month and add the days.

How long each invoice waits

Under Net 30 every invoice waits 30 days from its own date. Under an EOM term the wait depends on where in the month the invoice is dated. With EOM 10, an invoice dated April 2 waits 38 days for its May 10 due date, and one dated April 28 waits 12. With Net 30 EOM the same two invoices wait 58 and 32 days. Invoices dated early in the month always wait longest under an EOM term, because every invoice in the month shares one due date.

EOM with an early payment discount

An EOM term can come with a prompt-payment discount. The discount deadline and the net due date are whatever the contract states, so read both off the contract and put them into the early payment discount calculator, which shows the saving and the implied annual rate. The arithmetic is the same as for any discount: giving up 2 percent to pay 20 days later costs about 37 percent a year (2/98 × 365/20). Where the discount deadline counts from the invoice date and the net date from month-end, the gap between them, and so the implied rate, changes with the invoice date; work it out for each invoice rather than once for the term.

EOM versus Net 30

Net 30 gives each invoice its own due date, 30 days after the invoice date, so a month of invoices produces as many due dates as there are invoice dates. An EOM term gives every invoice dated in the same month the same due date. For an invoice dated on the last day of the month, Net 30 and Net 30 EOM give the same date; for every earlier invoice, Net 30 EOM is later than Net 30, by up to 30 days. For the Net 30 baseline, see the guide on what Net 30 means, and for how a due-date convention feeds into a collections figure, the guide on days sales outstanding.

A worked example

A printing supplier in Leeds invoices a retail chain on April 6 and again on April 22, both under EOM 15 terms. Despite the 16-day gap between the invoices, both are due on the same day: May 15, fifteen days after April 30. The supplier waits 39 days for the first invoice and 23 for the second, and the chain can pay both in one run on May 15.

When the due date falls on a weekend or holiday

An EOM due date is a calendar date, so it can land on a Saturday, a Sunday or a public holiday. Whether payment then moves to the next business day, or falls due on the business day before, is for the contract to say, or for the law that governs it where the contract is silent. The invoice due date calculator shows the date the term produces and, when that date is not a business day in the country you pick, the next business day after it.

Getting the anchor date right

This guide, like the calculator, takes the invoice date as the date that decides the month. A contract can name another date. If it counts from the date the invoice is received or the goods are delivered instead, the month that anchors the term can change: an invoice dated March 30 that the contract treats as received on April 2 moves from the March cycle to the April cycle, and its due date moves a month later. Check which date the contract uses before you work out the due date.

FAQ

What does EOM mean on an invoice?

EOM stands for end of month. Read on its own, "payable EOM" makes the invoice due on the last day of the month it is dated in. With a number, as in EOM 10, the payment falls that many days into the following month. The wording of your contract decides which reading applies.

What is the difference between EOM 10 and Net 30 EOM?

As this guide reads them, EOM 10 is due on the 10th of the month after the invoice month, and Net 30 EOM is due 30 days after the last day of the invoice month. Both count from month-end, by 10 and by 30 days, so they are always 20 days apart: for an April invoice, May 10 and May 30.

How long does an invoice wait under EOM terms?

It depends on the invoice date. Under EOM 10 an invoice dated April 2 waits 38 days and one dated April 28 waits 12; under Net 30 EOM they wait 58 and 32 days. Under Net 30 each waits 30 days from its own date.

Does the calculator handle EOM terms?

Yes. End of Month, Net 30 EOM and Net 60 EOM are term types in the invoice due date calculator. For EOM 10 or EOM 15, take the last day of the invoice month and add the days.

Are EOM due dates counted in calendar or business days?

In each form above, the month-end anchor and the added days are calendar days. Whether a due date that lands on a weekend or a holiday moves is for the contract, or the law that governs it, to say. The calculator flags such a date and shows the next business day.