How it’s calculated
Payment terms count calendar days from the invoice date, not from when the invoice is received. "Net 30" means the full amount is due 30 days after the invoice date. EOM here means payment is due on the last day of the month in which the invoice is dated.
Example: an invoice dated 15 January 2026 on Net 30 terms is due on Saturday, 14 February 2026 (16 days left in January + 14 in February = 30). On EOM terms it is due on 31 January 2026.
Terms such as "2/10, n/30" also give a 2% discount if paid within 10 days; the net date is still 30 days after the invoice date. Weekends and holidays are not skipped; check your agreement.
Frequently asked questions
Does Net 30 mean 30 business days?
No. Unless the contract says otherwise, Net 30 means 30 calendar days from the invoice date, including weekends and holidays.
What does EOM mean on an invoice?
End of month. Plain "EOM" usually means payment is due at the end of the month the invoice is dated. Variants like "Net 10 EOM" mean 10 days after the end of that month; use the custom option and count from month-end.
What does 2/10, n/30 mean?
A 2% discount if paid within 10 days of the invoice date; otherwise the full amount is due within 30 days.
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Sources
- Principles of Accounting, Volume 1, 6.1 Compare and Contrast Merchandising versus Service Activities and Transactions (credit terms) — OpenStax
- Prompt Payment — U.S. Department of the Treasury, Bureau of the Fiscal Service
Formulas are taken from the free public references above. Results are provided “as is” for informational and educational purposes only. See our disclaimer.
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