Tax Diary: May to June 2024 Deadlines That May Still Matter

This tax diary highlights key tax deadlines that fell between May and June 2024. It is relevant for taxpayers who want to check whether any filing or payment obligations early in the tax year were missed.

Although these dates have passed, unresolved actions linked to them can still result in penalties, interest, or HMRC follow-up, particularly where early-year requirements were not reviewed with a tax advisor in London at the time.

Key Tax and Payroll Deadlines for May and June 2024

• 1 May 2024 – Due date for corporation tax due for the year ended 30 July 2023.
• 19 May 2024 – PAYE and NIC deductions due for month ended 5 May 2024. (If you pay your tax electronically the due date is 22 May 2024).
• 19 May 2024 – Filing deadline for the CIS300 monthly return for the month ended 5 May 2024.
• 19 May 2024 – CIS tax deducted for the month ended 5 May 2023 is payable by today.
• 31 May 2024 – Ensure all employees have been given their P60s for the 2023/24 tax year.
• 1 June 2024 – Due date for corporation tax due for the year ended 31 August 2023.
• 19 June 2024 – PAYE and NIC deductions due for month ended 5 June 2024. (If you pay your tax electronically the due date is 22 June 2024).
• 19 June 2024 – Filing deadline for the CIS300 monthly return for the month ended 5 June 2024.
• 19 June 2024 – CIS tax deducted for the month ended 5 June 2024 is payable by today.

Why Early Tax-Year Deadlines Still Matter

Deadlines at the start of the tax year often set the tone for ongoing compliance. Where an obligation was missed, the issue does not fall away simply because later deadlines have passed.

HMRC can continue to pursue outstanding matters until they are resolved and these issues are often identified later through detailed checks carried out by a tax specialist in London or during HMRC compliance activity.

Common Obligations Around May and June

Deadlines during this period often relate to:

• Self Assessment obligations linked to the previous tax year
• VAT return submissions and payments
• PAYE and National Insurance reporting and payments
• Ongoing registration and reporting requirements

Which obligations applied will depend on your circumstances, such as whether you were self-employed, an employer, or VAT-registered.

What Happens If a Deadline Was Missed?

If a tax deadline in May or June 2024 was missed, HMRC may have charged penalties or interest.

In some cases, penalties increase the longer an issue remains unresolved. Even where no immediate action was taken, HMRC may still raise the matter later.

Why It Is Worth Reviewing Now

Some taxpayers assume that early tax-year deadlines are less important than those later in the year. In practice, unresolved issues from May or June can affect compliance throughout the rest of the tax year.

Reviewing whether all May–June 2024 obligations were met can help avoid unexpected demands or enforcement action later on.

HMRC Guidance on Late Tax Deadlines

HMRC provides guidance on late filing, late payment, penalties, and interest on
GOV.UK.

Did You Miss Any May or June 2024 Deadlines?

Whether any action is required now will depend on which obligations applied to you at the time and whether they were dealt with correctly. For individuals and businesses in Wimbledon and nearby areas such as Lower Morden and Cheam, CIGMA Accounting can review your position and confirm whether anything remains outstanding or needs to be put right.