Key Tax Deadlines - March & April 2026
03 Mar, 20261 minuteA number of important tax deadlines are coming up in March and April that you may need to be...
A number of important tax deadlines are coming up in March and April that you may need to be aware of to avoid incurring any penalties.
Have a look at our ‘dates for your diary’ below to see which dates may apply to you:
Date | What’s Due |
1 March | Corporation Tax for the year to 31/05/2025 (unless quarterly instalments apply) |
19 March | PAYE & NIC deductions and CIS return and tax, for the month to 05/03/2026 (due 22/03 if you pay electronically) |
1 April | Corporation Tax for the year to 30/06/2025 (unless quarterly instalments apply) |
1 April | National Minimum Wage rate increases take effect |
5 April | End of the 2025/26 tax year – many tax planning actions need to have been taken by this date, including making use of 2025/26 allowances) |
6 April | Start of the 2026/27 tax year. Updated tax rates, thresholds and statutory payment rates take effect |
6 April | Commencement of the Making Tax Digital for Income Tax regime |
19 April | PAYE & NIC deductions and CIS return and tax, for the month to 05/04/2026 (due 22/04 if you pay electronically) |
30 April | Annual Tax on Enveloped Dwellings (ATED) returns and payment for the chargeable period starting on 1 April 2026
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