What is an EOM (End of Month) term?

Payment is due by the last day of the calendar month the invoice was issued in - regardless of the exact invoice date. An invoice dated the 3rd and one dated the 28th of the same month would have the same EOM due date.

What does '15th of Next Month' (proximo) mean?

The invoice is due on the 15th of the month AFTER it was issued - a common proximo term used to consolidate payments to a single date each month, simplifying accounts payable for the buyer.

How is the late fee estimate calculated?

A simple illustrative estimate at 1.5% per month (a common late-fee rate), prorated for the exact number of days overdue. Always confirm the actual late fee against your specific contract or invoice terms, which may differ.

Can I use a custom payment term?

Yes - select 'Custom' and set any number of net days, plus an optional early-payment discount percentage and discount window in days.

Calculator

Payment Terms Calculator

Payment terms determine exactly when an invoice is due and whether an early-payment discount is available - but the rules differ by term type, and manually tracking a dozen invoices on different terms gets error-prone fast. Accountdesq's Payment Terms Calculator supports every common trade credit term - Net 15/30/45/60, 2/10 Net 30 style early-payment discounts, End of Month (EOM), 15th of Next Month (proximo), and fully custom terms - and instantly calculates the discount date, due date, days remaining or overdue, and an estimated late fee for as many invoices as you're tracking at once.

Read the full guide

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How it works

Add each invoice with its date, amount, and payment term (or load sample invoices to see it in action). The tool calculates the exact discount date and amount (if the term includes one), the due date, a visual timeline from invoice date to due date, and a live status - on track, due soon, or overdue with an estimated late fee. A summary at the top totals what's overdue, what's due within 7 days, and how much early-payment discount is still available if you act now. Export the full payment schedule as a PDF or Excel report.

Currency

Columns: Label, Invoice Date, Amount, Term (e.g. net30)

Invoice / Customer

Invoice Date

Amount

Payment Term

Due 2026-08-17

30d left

Common Mistakes to Avoid

Miscounting EOM (End of Month) terms - the due date depends on the invoice's month-end, not a fixed number of days after the invoice date
Missing the early-payment discount window because it's tracked separately (or not at all) from the due date
Confusing '2/10 Net 30' as a 2-day or 10% discount, when it actually means 2% off if paid within 10 days
Not accounting for weekends/holidays shifting an effective payment date, even though the stated due date doesn't move

Best Practices

Review the 'Due Soon' and 'Discount Available' totals at least weekly to act before windows close
Standardize on one or two payment terms across most customers/vendors to simplify tracking
Always confirm your actual contract's late fee rate - the estimate here is illustrative at 1.5%/month
Use the visual timeline to spot invoices approaching their discount window before it's too late to act

Why use this tool?

Missing a Net 30 due date damages a customer relationship; missing a 2/10 discount window quietly forfeits what's effectively a very high annualized return for paying 20 days earlier. Tracking every open invoice's terms in one place - with dates already calculated - turns a manual date-math exercise into an at-a-glance action list.

Frequently Asked Questions

It means the customer gets a 2% discount if they pay within 10 days of the invoice date; otherwise the full amount is due in 30 days. It's one of the most common early-payment discount terms in B2B trade.

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Disclaimer: Accountdesq provides this Payment Terms Calculator for informational and convenience purposes only. Output is not a substitute for professional accounting, legal, or tax advice. No data entered is transmitted to or stored on our servers - all calculations happen locally in your browser. Accountdesq accepts no liability for errors in generated documents. Always consult a qualified accountant or tax professional for compliance matters.