Calculate exact invoice due dates for any payment terms — Net 7, Net 30, Net 60, EOM, or custom. Includes UK bank holidays and business day calculations.
All 8 UK public holidays for 2026 baked in for accurate business day calculations.
Instantly see if an invoice is overdue and by how many days.
Download a calendar event so you never forget a due date.
Clear answers to common payment terms questions.
Standard Net 30, Net 60 etc. almost always refer to calendar days unless the contract explicitly states 'business days'. Net 30 in calendar days is approximately 6 weeks in business days — a significant difference. Always check your contract or trading terms.
This calculator defaults to calendar days, which matches standard UK commercial practice. Switch to Business Days mode only if your contract specifically calls for working days.
EOM means the payment is due on the last day of the month in which the invoice was issued, regardless of the invoice date. An invoice dated 5 March with Net 30 EOM would be due 31 March.
Variations include Net 30 EOM (due last day of month + 30 days) and EOM+30 (same). This tool implements pure EOM — due on the last calendar day of the invoice month.
In calendar days mode, weekends and holidays are included in the count — the due date can fall on any day of the week. This is the standard interpretation.
In business days mode, the calculator skips UK bank holidays and rolls to the next working day. The UK bank holidays for 2026 are built in: New Year's Day, Good Friday (3 Apr), Easter Monday (6 Apr), Early May Bank Holiday (4 May), Spring Bank Holiday (25 May), Summer Bank Holiday (31 Aug), Christmas Day (25 Dec), and Boxing Day (26 Dec).
If the calculated due date is before today's date, the result panel displays the invoice as OVERDUE with a red highlight and pulse animation, showing exactly how many days late it is.
This is calculated against your computer's current date — no server involved.
Under the UK Late Payment legislation, the maximum statutory payment term is 60 days for business-to-business transactions (30 days for public sector). Most contracts default to Net 30.
Creditors can also charge late payment interest at 8% above the Bank of England base rate on outstanding amounts. This tool is for reference only — always check your specific contract terms.