Add Business Days to a Date
Find the date that is N business days (Monday–Friday) after any start date.
How to use this tool
- Enter start date and business days to add in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your result date and the full breakdown beneath it.
Find the date that is N business days (Monday–Friday) after any start date.
How it works
Add Business Days to a Date finds the exact calendar date that falls a given number of business days (Monday-Friday) after a start date. Enter the start date and the number of business days to add, and the tool returns the resulting date, automatically skipping over weekends.
This is commonly needed to calculate payment due dates ('net 30 business days'), project delivery deadlines, regulatory response windows, and shipping or lead-time estimates. A simple calendar addition of 30 days can land on a weekend; this tool ensures the result is always a weekday.
Weekends are always skipped. Public holidays are not automatically excluded, so if the jurisdiction observes a public holiday within the range, add one extra business day for each holiday to compensate.
Worked example
Find a 'net 30 business days' payment due date
- Enter the invoice date as the start date (e.g. Monday 3 March 2025).
- Enter 30 as the number of business days to add.
- The tool returns the due date, skipping weekends automatically.
- Note any public holidays in the period and add extra days if needed.
The exact payment due date 30 business days after the invoice date (e.g. Wednesday 14 April 2025).
Common mistakes to avoid
- Not accounting for public holidays and delivering or expecting payment on a bank holiday.
- Using calendar days instead of business days for SLA or contract calculations — always clarify whether a deadline is expressed in calendar days or business days.
- Entering the number of weeks instead of days (e.g. typing 6 meaning 6 weeks, but the tool interprets it as 6 days).
Key terms
- Net business days
- A payment or delivery term specifying the number of working days (Monday-Friday) after a reference date by which something must occur.
- Lead time
- The number of working days between placing an order or starting a task and its completion or delivery.
Frequently asked questions
- Does this skip weekends?
- Yes — only Monday through Friday count as business days. Saturdays and Sundays are skipped automatically.
- Does it account for public holidays?
- No. To account for holidays, add extra days equal to the number of holidays in the range.