Tax date
Monday, October 5, 2026

Deadline for Self Assessment registration to notify HMRC of Income/Capital Gains Tax

Save the date

Add this important tax date to your calendar or subscribe to our calendar.
Urgent
Notice
Reminder

About this date

The "Deadline for Self Assessment registration to notify HMRC of Income/Capital Gains Tax" refers to the final date by which individuals in the United Kingdom must register themselves for Self Assessment with HM Revenue and Customs (HMRC) to declare their Income Tax or Capital Gains Tax liabilities. This deadline is significant for individuals who have not previously registered for Self Assessment but have income or capital gains that require them to report and pay taxes. By registering before the deadline, individuals ensure compliance with HMRC regulations and avoid potential penalties for failing to notify HMRC of their tax obligations. It's important to note that the specific deadline for Self Assessment registration may vary depending on individual circumstances, and it's advisable to consult the latest HMRC guidelines or official resources to determine the exact date applicable to your situation.

Related Resources

Urgent
Notice
Reminder
31
Jan
2026

Deadline for filing Self Assessment and Capital Gains Tax

Deadline for filing Self Assessment and Capital Gains Tax
Urgent
Notice
Reminder
31
Jan
2026

Online Self Assessment returns and tax bill payments for 2024/25 are due

The big one: Online Self Assessment returns and tax bill payments for 2024/25 are due. Let’s cross those t’s, dot those i’s, and start the new year worry-free.
Urgent
Notice
Reminder
2
Feb
2026

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
8
Mar
2026

Deadline for submitting a P46 (Car) for the quarter ending the 5th of July

Deadline for submitting a P46 (Car) for the quarter ending the 5th of July

Speak to a Crunch advisor today

If you're unsure what level of support you need, our friendly team are on hand to help you pick the right package for you.