Business Days in December 2025 for United Kingdom
December 2025 has 21 working days under the UK bank holiday calendar. December 2025 contains 2 UK bank holidays on weekdays. The month covers 31 calendar days, of which 8 are Saturday and Sunday. That count drives invoice cycles, payroll runs, and any contract that defines deadlines as a number of working days in United Kingdom.
working days
21
Calendar Days
31
Weekend Days
8
bank holidays
2
Work Weeks
4.2
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 wknd | 7 wknd |
8 | 9 | 10 | 11 | 12 | 13 wknd | 14 wknd |
15 | 16 | 17 | 18 | 19 | 20 wknd | 21 wknd |
22 | 23 | 24 | 25 Christmas Day | 26 Boxing Day | 27 wknd | 28 wknd |
29 | 30 | 31 |
bank holidays in December 2025
United Kingdom December deadlines
December is the year-end close month for finance teams. Boxing Day and Christmas Day produce a four-day stretch when they fall midweek. PAYE RTI for November is due by the 22nd electronically. HMRC Self Assessment volumes peak in the last ten days of the month as filers race the January 31 deadline. CHAPS and BACS calendar windows tighten.
Day-of-week distribution
The count of each weekday in December 2025. Useful for shift scheduling, weekly recurring billing, and any rota that depends on a specific weekday landing in-month.
| Day | Count |
|---|---|
| Monday | 5 |
| Tuesday | 5 |
| Wednesday | 5 |
| Thursday | 4 |
| Friday | 4 |
| Saturday | 4 |
| Sunday | 4 |
United Kingdom reporting cycles and business-day rules
UK business-day cycles run against HMRC's PAYE Real Time Information schedule (returns due by the 19th, electronic payment by the 22nd of the following month) and BACS three-day settlement (input Day 1, processed Day 2, credited Day 3). The Bank of England's CHAPS service settles same-day until 3:30pm London for a 4pm cutoff. Companies House filings use a working-day clock under the Companies Act 2006. Court deadlines under CPR 2.8 count clear days, excluding both the start and end day where business days are specified.
December 2025 working days compared by country
Working-day counts vary across countries because each country observes its own public holidays. The table below puts United Kingdom alongside the other ten supported holiday calendars for December 2025.
| Country | Business Days | Holidays this month |
|---|---|---|
| 🇺🇸United States | 22 | Christmas Day |
| 🇬🇧United Kingdom (this page) | 21 | Christmas Day, Boxing Day |
| 🇨🇦Canada | 21 | Christmas Day, Boxing Day |
| 🇦🇺Australia | 21 | Christmas Day, Boxing Day |
| 🇮🇳India | 22 | Christmas Day |
| 🇵🇭Philippines | 19 | Feast of the Immaculate Conception, Christmas Day, Rizal Day, New Year's Eve |
| 🇫🇷France | 22 | Noël |
| 🇩🇪Germany | 21 | Erster Weihnachtstag, Zweiter Weihnachtstag |
| 🇯🇵Japan | 23 | None |
| 🇲🇽Mexico | 22 | Navidad |
| 🇸🇬Singapore | 22 | Christmas Day |
How December 2025 compares year over year
December 2024 had 20 working days, so December 2025 has 1 more working day year over year. On the surrounding months, November 2025 has 20 working days and January 2026 has 21. Looking forward, December 2026 has 21 working days under the same UK bank holiday calendar.
Using this calculator in United Kingdom
A management accountant at a Manchester recruitment agency uses the 21-day December 2025 count to set IR35 invoice cycle dates for off-payroll workers and to confirm BACS settlement falls before each month-end. A Birmingham law firm cashier uses the count to track Civil Procedure Rules deadlines that count business days under CPR 2.8(2). A Bristol VAT-registered SaaS company uses it to align Making Tax Digital quarterly submissions with HMRC bank-clearing windows.
For informational purposes only
This calculator provides general estimates based on business day counting rules. It does not constitute legal advice. Deadlines in legal, regulatory, or contractual matters may be subject to jurisdiction-specific rules, court orders, or statutory exceptions. Always verify critical deadlines with a qualified professional.