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How Do I Register for Self Assessment

This guide will explain how and when to Register for Self Assessment. We will also cover how the process may vary depending on your situation.

Navigating the complexities of tax obligations can be daunting, especially if you're new to self-employment or freelancing. At Ultra Tax Ltd, we understand the importance of making your tax journey as smooth as possible. This guide provides detailed insights on how to register for self-assessment, obtain your Unique Tax Reference number (UTR), understand the self-assessment deadline, and much more. Whether you're unsure about when to register or you need to understand the process of getting your UTR, we've got you covered.

register for self-assessment

What is Self-Assessment?

Self-assessment tax returns are a system HM Revenue and Customs (HMRC) uses to collect income tax. Tax is usually deducted automatically from wages, pensions, and savings. However, for individuals or businesses with other sources of income, filing a tax return is essential to report and pay any owed taxes.

How to Register for Self-Assessment

Step-by-Step Guide

1. Determine Whether You Need to Register

Not everyone needs to register for self-assessment. Typically, you need to register if you are self-employed as a sole trader and earned more than £1,000, or if you are a partner in a business partnership.

2. Obtain a Unique Tax Reference (UTR) Number

Once you determine that you need to register, the next step is to obtain a UTR number. This is a 10-digit number that is unique to either you or your company and is required to file your tax returns.

3. Register Online

To register, visit the HMRC website and choose the option that best describes your status (self-employed, not self-employed, registering a partner or partnership). You’ll need to have your National Insurance number handy, as well as your business details.

4. Confirmation and Next Steps

After registration, HMRC will send you a letter with your UTR number and will enrol you for the self-assessment online service. It can take up to 10 working days (sometimes longer during peak times) to receive this letter.

How to Get a UTR Number

If you’re new to self-employment, you will receive a UTR number as part of the registration process for self-assessment. If you’ve misplaced your UTR number or need it for other purposes, you can find it on previous tax returns or your HMRC online account. If you still cannot locate it, you can contact HMRC directly.

When to Register for Self-Assessment

The deadline to register for self-assessment is the 5th of October in your business’s second tax year. For example, if you started your business in January 2023, you would need to register by October 5, 2024. Registering before this deadline ensures that you can fulfil your tax obligations on time.

Do I Need to Register for Self-Assessment?

If you are unsure whether you need to register, consider your employment status and your income sources. Generally, if you are self-employed, have untaxed income such as rent, or have earned significant income from savings or investments, you will need to register. HMRC also requires individuals who have sold assets and need to pay Capital Gains Tax to register for self-assessment.

Tips for Smooth Self-Assessment Registration

  • Keep your financial records organised: This includes records of all your income sources, expenses, and potential tax deductions. We can help you manage your tax deductions and make sure all your tax records are all organised.

  • Understand the deadlines: Missing the self-assessment deadline can result in penalties. Always aim to register and submit your tax return well before the deadline. Ultra Tax Ltd will always inform you about deadlines to make sure you are not hit with a penalty from HMRC.

  • Use HMRC-approved software: To facilitate the process, use software that is compatible with HMRC systems to prepare and submit your tax return.

Why Choose Ultra Tax Ltd for Your Self-Assessment Needs?

If you are struggling with your self assessment Ultra Tax Ltd are here to help. We can start on your tax returns right away using our easy-to-use online tax return form.

We specialise in simplifying the tax registration process and ensuring that your tax affairs are in order. Our expert tax team provides personalised advice, ensuring you understand your tax obligations and avoid any pitfalls.

Whether you need help with tax calculations, understanding tax deductions, or submitting your tax return online, our personalised service covers all aspects of Self-Assessment.

Registering for self-assessment doesn't have to be complicated. With the right guidance and support, you can navigate this process confidently. Remember, timely registration helps you manage your tax obligations effectively and avoids last-minute hassles.


Q1. How do I register for self-assessment if I am newly self-employed?

Register online via the HMRC website by providing your personal details and information about your self-employment.

Q2. How do you obtain a UTR number?

You will receive a UTR number automatically when you register for self-assessment. If you need to retrieve a lost UTR, you can do so through your HMRC online account or by contacting HMRC directly.

Q3. What is the deadline for self-assessment registration?

You must register by the 5th of October in your business’s second tax year.

Q4. Do I need to register for self-assessment?

If you are self-employed, have untaxed income, or need to pay Capital Gains Tax, you need to register for self-assessment.

Contact Ultra Tax Ltd today to help Register for Self-Assessment.

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Our friendly team is ready to assist you with any questions you may have about the process.

register for self-assessment


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