Filing Self-Assessment Tax Returns in the UK: When Can You Start After the Tax Year Ends?

The earliest you can file a self-assessment tax return in the UK, after the tax year ends, is on the very next day. For the tax year 2022-2023, which ends on April 5th, you can start filing from April 6th. However, the deadline to file remains on January 31st of the following year.

Understanding the Timeline

The HMRC system is typically ready for new tax returns only a short time after the tax year ends. However, it can take up to a month for the system to fully accommodate changes and new rules. Therefore, it is advisable to try accessing the system immediately after the tax year ends.

Normally, you can file your self-assessment tax return on the 6th of April following the tax year end, provided you have all the necessary information and the HMRC system is operational. However, in practice, due to factors such as delayed third-party information (e.g., P60 from employers, end-of-year tax statements from investments), early May is more realistic.

Practical Considerations

If you already have a login on the HMRC site at the start of the tax year, you may be able to file tax returns through the system as early as a week after the tax year ends. For instance, for the tax year starting April 6, 2019, you could expect to be able to file by April 13th.

However, there are several scenarios that may delay your ability to file:

Investment Income: If you have investment income, you may not receive your end-of-year tax statements for up to a month. Employment Income: Your P60 from employment may not be available for several weeks. Accounting and Financial Information: You may need financial information from your accountant or bank, which might take some time to gather and submit.

In such cases, May is often the earliest you can realistically file, giving you sufficient time to collect all necessary documents and ensure they are complete and accurate.

Final Considerations

While the HMRC system may be open for new tax returns, it is crucial to consider the time it takes to gather and input all the necessary data. The process involves not only collecting the information but also accurately entering it into the HMRC system or an accounting package, which can be time-consuming.

By understanding the timelines and practical considerations, you can better prepare and file your self-assessment tax returns on time, ensuring compliance and minimizing any potential penalties.

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