Business Days Calculator
Add or subtract UK business days from any date. Built for contract deadlines, payment terms, and commercial service levels — bank holiday aware across England & Wales, Scotland, and Northern Ireland.
Use a negative number to count backwards.
Enter a date and a number of working days.
Using business days in contracts
UK commercial contracts almost always specify obligations in business days rather than calendar days. Net 30 payment terms, notice periods, and cure periods exclude weekends and bank holidays so that no party is forced to act on a day the banks, courts, and most businesses are closed.
The applicable bank holiday calendar follows the governing law of the contract. A contract under Scottish law uses Scottish bank holidays (with 2nd January and St Andrew's Day, no Easter Monday). A cross-border or Northern Ireland deal may need its own calendar. Pick the matching region on the calculator above.
If a deadline still falls on a non-business day, most contracts include a clause that rolls the date forward to the next business day. A few roll it back. Check the wording — “next” vs “preceding” matters.
Typical commercial use cases
- Net 30 business days: the payment date 30 business days after the invoice date — usually around six calendar weeks.
- Notice of breach & cure periods:e.g. “10 business days to cure” — calculate the cure deadline from the date of notice.
- Long stop dates:deadlines in M&A transactions often expressed in business days from signing.
- Service level agreements: response and resolution times are commonly measured in business days, not 24×7 clock time.
Frequently asked questions
What's the difference between a business day and a working day?+
In the UK they mean the same thing in everyday and most legal use: Monday to Friday, excluding bank holidays. "Business day" tends to appear in commercial contracts and finance contexts; "working day" is more common in HR and employment.
What does Net 30 mean for business days?+
Net 30 typically means payment is due 30 days after the invoice date. If the contract says "30 business days" it excludes weekends and bank holidays. A 30-business-day window is usually six calendar weeks or slightly more, depending on where bank holidays fall.
Are business days the same in every UK region?+
No. Bank holidays differ between England & Wales, Scotland, and Northern Ireland. A contract governed by Scottish law uses the Scottish bank holiday calendar. Pick the matching region above.
Do banks operate on bank holidays?+
Most retail banking services are closed on UK bank holidays. Payment processing through Bacs and CHAPS pauses on bank holidays in the relevant region. Faster Payments runs every day, so retail-level transfers between consumer accounts often still arrive.
How are contract deadlines that fall on a non-business day handled?+
Most UK contracts include a clause that pushes a deadline falling on a non-business day to the next business day. Check the specific contract — the rule can also push backwards, or the parties may have agreed a different calendar entirely.
Can I use this for international business days?+
This calculator uses UK bank holiday data only. For cross-border contracts you should agree which jurisdiction's calendar applies and, if it's not the UK, use a calculator that supports that country.