UK Tax Calendar 2026/27
✓ Verified Deadlines & MilestonesFilter Deadlines
Start of the 2026/27 Tax Year
6 April 2026The new tax year begins. Tax thresholds, National Insurance limits, and allowances are updated to 2026/27 parameters.
First Self-Assessment Payment on Account
31 July 2026Deadline for self-employed individuals to pay their second installment towards their 2025/26 balancing tax bill.
P11D Filing & Payment of Class 1A NI
6 July 2026Deadline for employers to submit form P11D to HMRC reporting employee benefits in kind, and to settle Class 1A National Insurance obligations.
P60 Certificate Distribution
31 May 2026Employers must provide all active employees with a P60 summarizing their taxable income and deductions from the previous tax year.
Paper Self-Assessment Tax Return Deadline
31 October 2026HMRC must receive paper tax returns for the 2025/26 tax year by this date (avoidable if you file online).
Online Self-Assessment Return & Settle Tax Bill
31 January 2027Major milestone. Deadline to file your 2025/26 tax return online, pay the final tax balance, and pay the first Self-Assessment payment on account for 2026/27.
End of the 2026/27 Tax Year
5 April 2027Last day of the 2026/27 tax year. Make sure you maximize your ISA allowances (£20,000) and pension carry forward options before this date.
How We Calculated This
- Input variables: Enter the relevant amounts, rates, or percentages in the form.
- Real-time breakdown: The calculator applies HMRC rules and thresholds for the 2026/27 tax year to process the values.
- Display outputs: The visual graphs, donut charts, and tables are compiled dynamically to show your net take-home and deductions.
Real-World Examples
A basic calculation applying standard UK tax bands and allowances.
Calculation runs based on standard HMRC rules.
Factoring in a percentage of salary sacrifice or pension contributions.
Deductions are calculated and adjusted accordingly.
Frequently Asked Questions
Yes, all calculators are fully updated with the latest HMRC thresholds, personal allowances, and National Insurance rates for 2026/27.
These tools are for estimation and illustrative purposes only. For official tax returns, please consult a qualified accountant or reference HMRC directly.