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Our tax experts have prepared a 2025-2026 tax calendar for the United Kingdom, in order for you to keep an eye on the main statutory filing obligations and related deadlines.
Missing a deadline can lead to penalties, but with Accace, you stay one step ahead. Our local experts offer tailored support for filings, planning and advisory, helping you meet every requirement in line with the Romanian tax calendar. Explore our full range of tax advisory and compliance services in the United Kingdom.
January 19
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
January 22
Construction Industry Scheme (CIS)
Pay CIS electronically
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
January 31, 2026
PIT and payroll deadlines
Online self-assessment return due, balancing payment, and first payment on account
Additional Important Dates
Deadline for amending 2023–24 self-assessment tax returns
February 19
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
February 22
Construction Industry Scheme (CIS)
Pay CIS electronically
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
February 7, 2026
VAT
VAT return and payment (Q4 ending 31 Dec)
March 19
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
March 22
Construction Industry Scheme (CIS)
Pay CIS electronically
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
April 5
PIT and payroll deadlines
End of 2024–25 tax year
April 6
PIT and payroll deadlines
Start of 2025–26 tax year
April 19
PIT and payroll deadlines
Final PAYE submission/payment (2024–25)
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
22nd of each month
Construction Industry Scheme (CIS)
Pay CIS electronically
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
April 5, 2026
PIT and payroll deadlines
End of 2025–26 tax year
May 7
VAT
VAT return and payment (Q1 ending 31 Mar)
May 19
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
May 22
Construction Industry Scheme (CIS)
Pay CIS electronically
May 31
PIT and payroll deadlines
Issue P60 to employees
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
June 19
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
June 22
Construction Industry Scheme (CIS)
Pay CIS electronically
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
July 5
PAYE Settlement Agreement (PSA)
Apply for PSA for 2024–25 tax year
July 6
PIT and payroll deadlines
Submit P11D/P11D(b) forms to HMRC
July 19
PIT and payroll deadlines
Pay Class 1A NIC by cheque
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
July 22
PIT and payroll deadlines
Pay Class 1A NIC electronically
Construction Industry Scheme (CIS)
Pay CIS electronically
July 31
PIT and payroll deadlines
2nd payment on account for self-assessment (2024–25)
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
August 7
VAT
VAT return and payment (Q2 ending 30 Jun)
August 19
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
August 22
Construction Industry Scheme (CIS)
Pay CIS electronically
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
September 19
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
September 22
Construction Industry Scheme (CIS)
Pay CIS electronically
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
October 5
PIT and payroll deadlines
Deadline to register for self-assessment (2024–25)
October 19
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
PAYE Settlement Agreement (PSA)
Pay tax and NIC owed under PSA (by cheque)
October 22
Construction Industry Scheme (CIS)
Pay CIS electronically
PAYE Settlement Agreement (PSA)
Pay tax and NIC owed under PSA electronically
October 31
PIT and payroll deadlines
Paper self-assessment return due
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
November 7
VAT
VAT return and payment (Q3 ending 30 Sep)
November 19
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
November 22
Construction Industry Scheme (CIS)
Pay CIS electronically
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
December 19
Construction Industry Scheme (CIS)
Submit monthly CIS return and payment
December 22
Construction Industry Scheme (CIS)
Pay CIS electronically
December 30
PIT and payroll deadlines
Opt-in for PAYE collection (under £3,000 tax owed)
14 days after end of month
Additional Important Dates
EC Sales List submission (for EU trade)
1 month + 7 days after quarter-end
VAT
VAT return and payment (quarterly submissions)
Quarterly instalments (if profits >£1.5m)
CIT
Quarterly CT payments (months 7, 10, 13, 16) from start of accounting period
9 month after year-end
CIT
Submit Annual Accounts to Companies House
9 month + 1 day after year-end
CIT
Pay corporation tax
12 months after year-end
CIT
File Corporation Tax Return (CT600)
About Accace
Accace is a proactive consultancy and outsourcing partner who bridges the gap between needs and solutions. Combining smart and streamlined technology with a holistic approach, we provide an all-round care to clients and consider their matters as our own. With over 800 experts and approximately 2,000 customers, we have vast experience with facilitating the smooth operation and growth of small to large-scale, global businesses.
About Accace Circle
Accace operates internationally as Accace Circle, a co-created business community of like-minded BPO providers and advisors who deliver outstanding services with elevated customer experience and erase the borders of service delivery. Covering over 60 jurisdictions with more than 7,000 professionals, we support over 80,000 customers, mostly mid-size and international Fortune 500 companies from various sectors, and process at least 800,000 pay slips globally.
