UK Tax Year 2024/25: Key Events and Deadlines

In the UK, every business owner should be aware of the key tax dates to stay compliant with HMRC. Are you also worried about keeping track of all of them? Don’t worry—we’ve got you covered.

You might be unaware of the important dates and deadlines for all newly registered UK companies and people new to self-employment. Knowing these dates is as essential as keeping up with the year’s current tax rates, allowances, and thresholds. So be sure to enlist all the dates to stay stress-free in the long run.

We’ve compiled all the accounting dates and timelines so you can track every deadline and set up your calendar accordingly. The dates differ for limited companies as they depend on filing deadlines and other changes.

Using these timelines on the calendar can help you stay organised with your accounting and finances.

For easy navigation, here’s the table of contents to guide you through the article.

• key-dates-of-the-UK-tax-year-that-you-should-know
• CIS, NICs, and PAYE Compliance: Monthly Deadline Overview
• Get the Expert’s Support

Key Dates of the UK Tax Year that You Should Know

Below, we have explained the key tax dates you should know for 2025.

January 2025- (Self-Assessment Deadline)

January 31 is the last date for self-assessment and Capital Gains Tax & Payment on account due.
Your self-assessment tax return and capital gains tax must be submitted to HMRC by the 31st January deadline, or you could get a fine.
Your remaining tax from the previous tax year is due, and your first payment on account for income tax for the current tax year is also due.

February 2025 – (Submit a P46 form)

February 2 is the deadline to submit a P46 (Car). If the employer provides an employee with a company car, stops providing it, or gives the employee an additional vehicle, the employer will submit a P46 form to HMRC. If this was done until the 5th quarter of January, your submission deadline will be February 2.

You can find these on the HMRC online website.

March 2025 – (Advisory Fuel Rates)

The New March 1 advisory fuel rates for company car users are due. HMRC will publish the updated AFRs so that company car users can see the rates, when to use them, and how they are calculated.

April 2025 ( Ending of Personal Tax Year)

A tax year starts from April 5 to April 6 every year. Often, HMRC undergoes changes in the new tax rates and regulations in the new year.

April 6 – Beginning of Personal Tax Year

The new tax year always starts on April 6. Therefore, every UK resident should be aware of and prepared for every new tax change to manage finances and avoid unexpected payments.

April 19- (Deadline for Employers Final PAYE Return)

April 19 is the deadline for the final PAYE return (Full payment submission). If it is not submitted on this day, automatic interest will be charged on the PAYE Tax, Student Loans, Class 1 NI, or CIS deductions not paid.

This complete payment submission declares the complete employee details to HMRC. It also informs about the pay and deductions for the financial tax year. To stay compliant, you should send the details before the deadline of April 19.

3rd May 2025 (Deadline for submitting P46 to employees)

This is the deadline for employees to submit P46 for their car/fuel by employee quarter to April 5. The deadline for this submission depends on when you provide the company car and stop or change the car. If the change is made in the quarter ending April 5, your deadline for P46 would be May 3.

On November 5, access this form via the HMRC website.

31st May ( Deadline for P60 form issued to employees)

A P60 summarises your pay and deductions from a specific tax year. Every year, on May 31, your employer will automatically issue your P60. However, if you are self-employed, you won’t obtain the P60 form as you are a part of the PAYE system. However, if you are working with other employees, you must submit a P60 form.

6th July 2025 ( Deadline for P11D, P11D(b))

6TH of July is the deadline for submitting P11D and P11Db forms with employment-related securities. The form P11D form is used to report the benefits in kind. You receive These services from the company besides the salary, private healthcare, interest-free loans and company cars. July 6 will be the end date for submitting the form to HMRC. Employment-related schemes are a method to transfer shares to company employees. This scheme can be tax-advantaged or non-tax-advantaged. This can be submitted to HMRC by July 6.

July 31 (Deadline for Second Payment on Account Due)

July 31 allows the self-employed to make their second payment for the year’s tax bill in advance. HMRC splits the payment into two, so the self-employed can pay quickly and stay compliant.

August 3 2025 ( Deadline for a P46)

The deadline for submitting the P46 form for the quarter ending July 5 is August 3. This deadline also depends on when the company provides, stops, or changes the company car. If this is done in the quarter ending July 5, then the deadline for the P46 would be August 3.

Deadlines for Your VAT Returns 2024/2025

All businesses should submit a VAT return. The submission deadline for VAT returns should be 1 month and 7 days after the VAT duration ends. This one applies to both monthly and quarterly payers.

Suppose your VAT period ends on October 30; your VAT return is due by December 7.

The following table will explain the deadlines for VAT returns till December.

7th January	The VAT Returns deadline period ends on the 3rd of November.
7th February	The VAT Returns deadline period ends on the 31st of December.
7th March	The VAT Returns deadline period ends on the 31st of January.
7th April	The deadline for the VAT returns period ends on 28th February.
7th May	The VAT Returns deadline period ends on the 31st of March.
7th June	The VAT Returns deadline period ends on the 30th of April.
7th July	The VAT Returns deadline period ends on the 31st of May.
7th August	The VAT Returns deadline period ends on the 30th of June.
7th September	The VAT Returns deadline period ends on the 31st of July.
7th October	The VAT Returns deadline period ends on the 31st of August.
7th November	The VAT Returns deadline period ends on the 30th of September.
7th December	The VAT Returns deadline period ends on the 31st of October.

CIS, NICs, and PAYE Compliance: Monthly Deadline Overview

CIS, NICS and Paye are the monthly deadlines for payments to HMRC. For example, if your business has employees and you deduct income tax and National Insurance student or postgraduate loans monthly, you’ll have the following deadlines. Every month’s deadline ensures that HMRC receives the payment. The same rules apply to the Construction Industry Scheme. 19th is for submitting older methods like the cheque by post or to allow HMRC enough time to process these. However, the 22nd is the deadline for payments like Bacs. If this deadline is not met, you could have a penalty from HMRC.

19th is the monthly deadline for the postal payments of CIS, NICS and PAYE to HMRC.

22nd will be the monthly deadline for electronic remittance of CIS, NICS and PAYE to HMRC.

Get the Expert’s Support

Whether you are newly self-employed, starting your limited company, or planning to start a new business, you must have all the accounting dates in your calendar to cope with the taxes. If you find any difficulty, you can consult with the experts. Our team is always here to assist you.