Tax date
Monday, January 31, 2028

Final MTD tax return due (formerly Final Declaration)

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About this date

  • What to do: Submit your itax return for 2026/27. HMRC will use your four quarterly updates to calculate your final tax liability.
  • Tip: Include any adjustments or reliefs not covered in the quarterly updates.
  • Why it matters: This is the official deadline to avoid late filing penalties.
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    Urgent
    Notice
    Reminder
    30
    Dec
    2026

    Deadline to file your Self Assessment online for PAYE collection

    Deadline to file your Self Assessment online for PAYE collection
    Urgent
    Notice
    Reminder
    31
    Jan
    2027

    Deadline for filing Self Assessment and Capital Gains Tax

    Deadline for filing Self Assessment and Capital Gains Tax
    Urgent
    Notice
    Reminder
    2
    Feb
    2027

    Deadline for submitting a P46 (Car)

    The "Deadline for submitting a P46 (Car)" is the final date by which individuals or employers in the United Kingdom must submit the P46 (Car) form to HM Revenue and Customs (HMRC). The P46 (Car) form is used to report changes or updates related to company-provided cars and their associated tax implications. This includes situations such as when an employee starts using a company car, changes their car, or stops using a company car. Timely submission of the P46 (Car) form ensures compliance with HMRC regulations and helps ensure accurate tax calculations for both employers and employees. It is important to note that the specific deadline for submitting the P46 (Car) form may vary, so individuals and employers should consult the latest HMRC guidelines or official resources to determine the exact date for a particular tax year or reporting period.
    Urgent
    Notice
    Reminder
    7
    Feb
    2027

    Third quarterly update due for MTD IT (formerly MTD ITSA)

    Third quarterly update due for MTD for Income Tax

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