Tax Information Hub
Simple, clear guides to help you navigate the UK tax system.
Current Tax Year & Key Deadlines
Tax Years Defined
- Current Tax Year:6 April 2025 to
5 April 2026 - Previous Tax Year:6 April 2024 to
5 April 2025
Upcoming Deadlines (2024/25 Returns)
- Oct05
Register for Self Assessment
If you haven't filed before.
- Oct31
Paper Return Deadline
Deadline for sending a paper tax return.
- Jan31
Online Return & Payment Deadline
Submit online return, pay 2024/25 tax, and first payment on account for 2025/26.
Why the Odd Timing?
The UK tax year starts on 6 April due to a historical quirk. The financial year originally started on 25 March (Lady Day). When Britain switched from the Julian to the Gregorian calendar in 1752, days were skipped. To avoid losing tax revenue, the Treasury adjusted the start date, eventually settling on 6 April.
UK Tax Codes Explained
Decode 1257L, K codes, BR, and find out if you're paying too much tax.
Tax Code Checker Wizard
Run a quick check on your tax code and get practical next steps.
Tax Reliefs & Marriage Allowance
Claim tax relief for working from home, uniforms, and professional subscriptions.
Self Assessment Guide
Do you need to file a tax return? Learn the criteria and deadlines.
Pension Tax Relief
Maximize your pension savings and claim higher rate tax relief.
Payslips & Tax Documents
Understand your P60, P45, P11D and spot errors on your payslip.