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Tax calendar

The red text indicates an entry relevant to companies and employers, black refers to personal tax, and bold indicates an important item.

Click on an item to find out more detail of how it may affect you.

If you would like to receive email reminders before these key tax dates from our taxREMINDER system, then click here to register on our website.

March 2026

Is this relevant to you?

The final deadline of 5th April 2025 is relevant to individuals who have not considered year-end tax planning issues.  These issues include:

  • utilising your annual capital gains tax exemption
  • utilising your annual inheritance tax exemption for gifts
  • utilising your annual Individual Savings Account investment limit (ISA)
  • making additional pension contributions for 2025/26.

Please get in touch if you would like any further advice on these or any other issues.

July 2026

Is this relevant to you?

This deadline is relevant to individuals who need to complete a self assessment tax return and make direct payments to HMRC in respect of their income tax, Class 4 NI, capital gains tax and High Income Child Benefit Charge liabilities (unless paid via PAYE).

The second payment on account in respect of income tax and any Class 4 NI is due for payment by 31st July 2026. Interest is charged on any late payments.

If we have already dealt with this matter on your behalf you need take no action.

December 2026

Is this relevant to you?

This deadline is relevant for those individuals who complete a self assessment tax return online and who are employees. Where you have an underpayment you may request that HMRC collect the tax outstanding by making an adjustment to your tax code for the year 2027/28.

March 2027

Is this relevant to you?

The final deadline of 5th April 2026 is relevant to individuals who have not considered year-end tax planning issues. These issues include:

  • utilising your annual capital gains tax exemption
  • utilising your annual inheritance tax exemption for gifts
  • utilising your annual Individual Savings Account investment limit (ISA)
  • making additional pension contributions for 2026/27.

Please get in touch if you would like any further advice on these or any other issues.