Due date calculator

Compute invoice-style due dates — net N days, end of month +N, or end of next month +N — with weekend adjustment.

Payment term
If the due date lands on a weekend

Computed in this browser. Nothing is sent anywhere.

Calendar-day terms with an optional weekend roll; holidays are not handled. Net counts from the invoice date; EOM adds days to the month's last day.

How to use

  1. Pick the invoice date.
  2. Choose the terms (net days or month-end rule).
  3. Read the due date, day of week, and days remaining.

What it supports

Calendar-day math only: weekends can be pushed forward or pulled back, but public holidays and business-day conventions are not modelled. Dates between 1900 and 2100.

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