Explaining Self-Assessment and Tax Returns to Clients: A Clear and Professional Guide
Introduction
Self-assessment can be confusing, but it’s important if you need to report your income and taxable gains. HM Revenue and Customs (HMRC) uses self-assessment to collect income tax from individuals. This guide will help you understand how self-assessment tax returns work and what you need to do to stay compliant.
What is Self-Assessment?
Self-assessment is a system that allows individuals to report their income and capital gains to HMRC. It’s used to calculate the income tax you need to pay. Unlike PAYE (Pay As You Earn), where employers deduct tax directly from wages, self-assessment means you are responsible for filing your own tax return.
Who Needs to File a Self-Assessment Tax Return?
You may need to file a tax return if you:
Are self-employed or a partner in a business partnership.
Earn rental income from property.
Receive untaxed savings or investment income.
Have foreign income.
Earn income from dividends, investments, or savings above a certain limit.
Example: Jane is a self-employed graphic designer who earns rental income from a property she owns. Because she is self-employed and has rental income, she needs to file a self-assessment tax return.
If you are unsure, you can check using the HMRC self-assessment guidelines.
Key Deadlines
It is important to know the deadlines for filing your self-assessment tax return:
Paper Tax Returns: Must be submitted by 31 October following the end of the tax year.
Online Tax Returns: The deadline is 31 January following the end of the tax year.
Payment of Tax Owed: Must be made by 31 January following the end of the tax year.
Example: John needs to file his online tax return for the 2023-2024 tax year. To avoid penalties, he must submit it by 31 January 2025 and ensure any tax owed is also paid by that date.
Missing these deadlines can result in penalties. Make sure you stay on track to avoid any extra charges.
Registering for Self-Assessment
If you need to file a tax return for the first time, you must register for self-assessment:
Register Online: Go to the HMRC registration page and follow the steps to register.
Unique Taxpayer Reference (UTR): Once you register, HMRC will give you a UTR number, which is needed to file your return.
If you need help registering, MA & CO Accountants can provide guidance.
Completing the Tax Return
Filling out your tax return involves a few key steps:
Gather Necessary Documents: Collect all records of income, expenses, and other relevant documents.
Use HMRC's Online Service: Log into your account on the HMRC website to complete your return.
Declare All Income: Report income from all sources, such as employment, self-employment, dividends, and rental income.
Claim Allowable Expenses: Deduct any allowable expenses from your income to reduce your tax bill. For example, expenses like travel, office supplies, or professional fees.
Example: Sarah works as a freelance photographer and earns additional income from a part-time job. To complete her self-assessment, she gathers her income records, including invoices from her freelance clients and payslips from her part-time employment. She also keeps receipts for her photography equipment as allowable expenses to claim deductions.
For more detailed guidance on how to fill out your tax return, you can visit the HMRC official guide.
Common Allowable Expenses
There are many types of allowable expenses you can deduct from your income:
Business Expenses: These include things like office supplies, travel costs, and professional fees.
Home Office: If you work from home, you can claim a portion of your home expenses.
Charitable Donations: If you donate to registered charities, you may be able to deduct those donations.
Example: Mark is a consultant who works from home. He claims part of his electricity, internet, and phone bill as a home office expense. He also claims travel expenses when he visits clients for work purposes.
Remember: Only expenses that are wholly and exclusively for business purposes are allowed.
Payment on Account
If your tax bill is more than £1,000, you might need to make advance payments, called payments on account. These payments help you pay towards next year’s tax bill in advance.
31 January
31 July
Example: Emma’s tax bill for the 2023-2024 tax year is £1,500. Because her bill is over £1,000, she needs to make two payments on account—one in January 2025 and the other in July 2025—to cover her tax liability for the next year.
Penalties for Late Submission
Failing to file your tax return on time can result in penalties:
Missed Deadline: A penalty of £100 if you miss the filing deadline.
Three Months Late: Daily penalties of £10, up to £900.
Six Months Late: Additional penalties and interest on any unpaid tax.
Example: Alex forgot to submit his tax return by the 31 January deadline. As a result, he received an immediate £100 penalty. Because he was more than three months late, he also faced daily penalties of £10, which added up quickly.
Make sure to submit your return and pay any tax owed by the deadlines to avoid these penalties. For support, you can use MA & CO Accountants' late submission help.
Strategies for Tax Efficiency
1. Use Allowances and Reliefs
Personal Allowance: Everyone has a personal allowance of income they can earn tax-free.
Marriage Allowance: You may be able to transfer part of your personal allowance to your spouse.
2. Keep Accurate Records
Good record-keeping helps ensure you claim all allowable expenses and avoid mistakes.
3. Claim All Deductions
Make sure to claim all the deductions and reliefs you are entitled to. This includes charitable donations and pension contributions.
Case Study: The Impact of Self-Assessment
Let’s look at some recent statistics on self-assessment tax returns:
| Statistic | Details | Source |
|---|---|---|
| Total Self Assessment Filers (2022-2023) | 11.5 million taxpayers submitted their returns by the 31 January deadline. | HMRC News |
| Penalties for Late Filing (2022-2023) | HMRC collected £220 million in late-filing penalties, a five-year high. | Financial Times |
| Common Scams Reported | Nearly half of the 144,298 scams reported to HMRC were fake self-assessment rebates. | International Adviser |
| New Online Tool by HMRC | HMRC launched a tool to help individuals determine if they need to pay additional tax to avoid fines. | The Sun |
| Self-Assessment Registration | Approximately 11.7 million people filed their tax returns via Self Assessment for the 31 January deadline in 2023. | Wilson Wright LLP |
Seeking Professional Assistance
Self-assessment can be complicated, especially if you have multiple income sources or complex deductions. Getting help from a qualified accountant or tax advisor can make the process much easier. It also helps ensure your return is accurate and that you’re paying the right amount of tax.
Useful Resources
HMRC Self-Assessment Portal: Official guide for filing your tax return.
HMRC Helpline: Contact HMRC for help with your tax return.
MA & CO Accountants Self-Assessment Services: Get help from professionals who can guide you through the process.
Conclusion
Understanding self-assessment is essential for staying compliant and managing your tax responsibilities. By adhering to deadlines, maintaining accurate records, and using professional assistance when needed, you can make sure your tax returns are filed properly. Avoiding mistakes and penalties will save you time, stress, and money in the long run.
For more support with your tax returns or any questions related to self-assessment, reach out to MA & CO Accountants. We are here to help you every step of the way.
FAQs
1. What happens if I miss the self-assessment deadline?
If you miss the deadline, you will face a £100 penalty. If you are more than three months late, you will face additional daily penalties.
2. How do I register for self-assessment for the first time?
You can register online via the HMRC website.
3. Can I claim expenses if I am self-employed?
Yes, you can claim allowable expenses that are wholly and exclusively for business purposes, such as office supplies, travel, and professional fees.
4. What is payment on account?
Payment on account is an advance payment towards your next year's tax bill. It is due if your tax bill exceeds £1,000, and payments are made in January and July.
5. How do I know if I need to complete a self-assessment tax return?
If you receive income outside of PAYE, such as rental income, foreign income, or are self-employed, you will need to complete a tax return. For more details, visit the HMRC guidelines.


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