Tax Deadlines
Key Self Assessment, VAT, and MTD deadlines for the current tax year.
Register for Self Assessment (new self-employed)
SA
Paper Self Assessment return deadline
SA
Online SA return (if you want HMRC to collect via PAYE)
SA
Online Self Assessment return + pay tax owed
SA
First payment on account for 2025/26
SA
Second payment on account for 2025/26
SA
New tax year starts (2026/27)
Tax Year
MTD for Income Tax begins (income >£50k)
MTD
MTD for Income Tax (income >£30k)
MTD
Source: GOV.UK. Tax year 2025/26.