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.
Worked examples
Worked through with the calculator above, using the England & Wales calendar. Switch region to see how a Scottish- or Northern Ireland-governed contract differs.
Net 30 business days on an invoice
An invoice is dated Friday 1 May 2026 with payment terms of 30 business days.
- Question
- By when must it be paid?
- Answer
- Tuesday, 16 June 2026
- Why
- Thirty business days runs to roughly six calendar weeks. The Early May (4 May) and Spring (25 May) bank holidays both fall inside the window in England & Wales, pushing the due date later than a plain six-week count.
A 10-business-day cure period
A notice of breach is served on Wednesday 18 November 2026, giving 10 business days to remedy.
- Question
- When does the cure period expire?
- Answer
- Wednesday, 2 December 2026
- Why
- Counting begins the next business day and skips two weekends. No bank holidays fall in late November, so the deadline lands two clear working weeks out.
A deadline that runs into Christmas
A 5-business-day task is triggered on Monday 21 December 2026, in the week containing Christmas Day and the Boxing Day substitute (28 December).
- Question
- When is it due?
- Answer
- Wednesday, 30 December 2026
- Why
- The festive bank holidays and the weekend strip out most of the late-December calendar, so a five-business-day task tips well into January — a common trap for cure periods and payment runs.
Who uses this, and how
HR & employment
Settlement-agreement consideration periods, grievance and appeal timetables, and SLA targets for HR shared-service desks are commonly fixed in business days. Using the right regional calendar keeps a UK-wide workforce on a consistent footing.
Legal & commercial
Long-stop dates, conditions-precedent deadlines, and notice and cure periods in commercial contracts almost always run in business days as defined by the agreement. Match the region to the governing law before you count.
Finance & accounts payable
Net 30 business-day terms, BACS three-day clearing, and CHAPS same-day settlement all depend on which days the banks are open. Projecting a payment date in business days prevents chasing an invoice that is not yet overdue.
Project management
Procurement lead times, milestone gaps, and float on a critical path are clearer in business days. Subtracting business days from a go-live date reveals the latest a dependency can land without slipping the launch.
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.
How is a "business day" usually defined in a contract?+
A typical definition reads something like "a day other than a Saturday, Sunday or public holiday in England on which banks are open for general business in London". The exact wording matters: a London-banks test, a named-region test, and a simple "weekday" test can produce different deadlines in a year with awkwardly placed holidays.
Does the day of the triggering event count as the first business day?+
Usually not. Most clauses count from the day after the event — so "within 10 business days of receipt" starts counting on the next business day after receipt. Some statutory and court timetables count differently, so always read the clause or rule that applies.
How many business days are in a typical month?+
Between about 19 and 23, depending on the month's length, where the weekends fall, and how many bank holidays land in it. April and May in England & Wales are often lighter because of Easter and the two May bank holidays; see the month-by-month pages for exact figures.
What happens to deadlines over Christmas?+
The week between Christmas and New Year contains Christmas Day, Boxing Day, and often substitute days, so very few business days fall in it. A "5 business day" task started in mid-December can easily run into January. Plan cure periods, payment runs, and notice periods around this gap.