A contract says "10 business days," an invoice says "Net 30," and neither one means what the calendar on your kitchen wall means. Pick a start and end date and this tool counts the actual weekdays between them, so you know the real due date before you are the one explaining a missed deadline.
Estimates only.
Business day, here, means Monday through Friday. The calculator counts from your start date to your end date, inclusive, and splits the total into weekdays and weekend days.
The count only removes Saturdays and Sundays. It does not know about federal holidays, state holidays, or the Friday your office closes early for no particular reason. Catch New Year's Day and Martin Luther King Jr. Day in the same date range, for instance, and both are still sitting in the "business days" total until you subtract them by hand. That is not a bug to work around, it is just the difference between counting weekdays and counting the days an office is actually open, and contracts usually mean the second one.
This counts calendar weekdays. It will not catch a holiday closure, a snow day or a client's actual office calendar, so double check anything with real money on the line.
For international contracts, the business week itself can differ: Friday-Saturday is the standard weekend in Saudi Arabia, which matters when a contract specifies "business days" without naming a jurisdiction.
Once the date math is settled, the money math is usually next.
Monday through Friday, generally. Saturdays, Sundays, and public holidays do not count in most contracts, though the definition can vary by jurisdiction or industry. Some financial contracts define business days by reference to bank-open days in a specific city, which is a detail that matters until it suddenly matters a lot.
No. Weekends are excluded automatically. Federal and state holidays that fall on weekdays stay in the count and need to be subtracted by hand. The US has 11 federal holidays; most years, several fall on weekdays.
Enter the invoice date as the start date and count forward 30 business days. That date is the payment due date. Subtract any holidays that fall on weekdays within the window, and note your contract's governing law, since some states define "business day" differently than federal usage.
Calendar days count every day. Business days count only weekdays (Monday-Friday). A 10-business-day window is typically 14 calendar days, assuming no holidays fall in the stretch. A month-end sprint that straddles a long weekend can shrink fast.
Most months contain 21 to 23 business days, depending on how weekends and holidays fall. January 2025, for instance, has 23. Use the calculator with the first and last day of any month to get an exact number rather than estimating.
