Do I need to do a tax return?

If you’re asking yourself, “Do I need to do a tax return?” you’re not alone. Every year, millions of people in the UK wonder whether they need to complete a tax return, do a Self Assessment, submit a tax return to HMRC, or file a tax return at all. The answer depends on your income, how you earn it, and whether tax has already been deducted at source. In this guide, we’ll walk you through exactly when you need to do a tax return, and when you don’t.

Key scenarios requiring mandatory filing

You’ll almost certainly need to file a Self Assessment tax return if any of the following apply to you:

• Self-employment. If you’re a self-employed sole trader or in a partnership and your gross income exceeds the HMRC registration threshold, you must file. This applies even if you made a loss.
• Property or rental income. If you receive rental income from UK or overseas property, you’ll usually need to report it through Self Assessment. Keep an eye on Making Tax Digital (MTD) for Income Tax, which will require landlords and the self-employed above certain income thresholds to keep digital records and submit quarterly updates to HMRC. Check GOV.UK for the latest MTD rollout dates.
• High income and the Child Benefit charge. If you or your partner earns above the High Income Child Benefit Charge threshold and either of you claims Child Benefit, the higher earner must file a tax return to pay the charge. Even if you’ve opted out of receiving Child Benefit payments, HMRC may still expect a return if your income crosses the threshold.
• Capital gains above the annual exempt amount. If you’ve sold assets such as shares, a second property, or cryptocurrency, and your total gains exceed the Capital Gains Tax annual exempt amount, you need to report them. You may also need to file a return if your total disposal proceeds exceed four times the annual exempt amount, even if no tax is due. Note: gains from shares in an ISA don’t count.
• Foreign income or expat status. UK tax residents with overseas income, such as foreign employment income, pensions, or investment returns, generally need to file a tax return, even if tax was paid abroad.
• Untaxed savings or investment income above allowances. Interest or dividends that exceed your Personal Savings Allowance or Dividend Allowance must be declared through Self Assessment (not including interest or dividends from ISAs).

Important deadlines and tips

Missing a deadline means automatic penalties, so these dates matter:

• Paper tax returns. Must reach HMRC by 31 October following the end of the tax year (5 April). For example, for the 2024/25 tax year, the paper deadline is 31 October 2025.
• Online tax returns. Must be submitted by 31 January following the end of the tax year. For 2024/25, that’s 31 January 2026.
• Payment deadline. Any tax you owe must also be paid by 31 January. If you’re required to make payments on account, a second payment is due by 31 July.

Making Tax Digital (MTD) for Income Tax will introduce quarterly digital submissions for qualifying self-employed individuals and landlords. HMRC is phasing this in. Check GOV.UK for the latest start dates and income thresholds, as these may change future reporting obligations.

Who needs to file a tax return?

Anyone with income or gains that haven’t been fully taxed at source, or who meets specific HMRC criteria, needs to file a Self Assessment tax return. Below are the most common scenarios.

1. You want to claim a tax refund

In some cases, you may have to submit a tax return to claim a refund if you’ve paid too much income tax. Here are some examples:

• You work in the construction industry through the CIS scheme
• You’ve made investments in SEIS, EIS-eligible startups, or VCT funds
• You’ve made donations to charity
• You made private pension contributions as a higher rate taxpayer
• You had work expenses over £2,500

2. If you have any untaxed income

Here are some situations where you may need to declare your income to HMRC, depending on how much you’ve made:

• You’re self-employed and earned more than £1,000
• You earn rental income
• If you made profit from investments – usually property or stocks; gains from shares in an ISA don’t count. You’ll have to use HMRC’s Real Time Capital Gains Tax Service if you sell property instead of filing a tax return
• You earned savings interest – also not from savings within a cash ISA
• You received dividends – also not from a stocks & shares ISA
• You’re earning foreign income
• You have any other sort of untaxed income more than £1,000

3. HMRC tells you to submit one

Sometimes HMRC may decide you need to file a tax return. They’ll usually let you know by sending you a notice to file (form SA316). This is a formal, legal requirement to submit a return by the deadline, even if you believe you don’t owe any tax. Ignoring a notice to file will result in automatic penalties. If you think the notice was sent in error, contact HMRC and ask them to withdraw it before the deadline.

Some of the most common reasons HMRC issues a notice:

• You didn’t deregister from Self Assessment, so HMRC is still expecting a tax return from you
• You’ve paid too little tax
• You have any untaxed income that cannot be collected through PAYE

Separately, HMRC may send you a P800 tax calculation if they think you’ve paid too much or too little tax through PAYE. A P800 doesn’t mean you need to file a Self Assessment return. It’s simply a notification of an over- or underpayment. However, if you receive one, it’s worth checking whether filing a return could help you claim a refund.

4. You qualify for benefits

In some cases, you may have to file a Self Assessment tax return if you quality for benefits, i.e:

• You need to prove you’ve been employed or self-employed to claim Maternity Allowance or Tax-Free Childcare
• You or your partner’s income was over the threshold and you claimed Child Benefit (this is called the High Income Child Benefit Charge)

5. Other situations

You may also need to file if:

• You live abroad and had income from the UK
• You’re in a partnership
• You are a minister of any religion
• You are a trustee
• You’re a “name” at Lloyd’s of London
• Your annual income exceeds certain thresholds (check GOV.UK for the current figure)

Who is not required to file a Self Assessment tax return?

If all of your income is taxed at source and you don’t meet any of the triggers above, you probably don’t need to file. Most people in the UK do not need to file a tax return because any taxable income they have is taxed through a system called PAYE (Pay As You Earn).

You’re typically exempt if you:

• Are employed with a single job and paid entirely through PAYE, with no additional untaxed income
• Receive only the State Pension (and it’s your sole income, or HMRC adjusts your tax code to collect any tax due)
• Have savings interest and dividends below the threshold of the Personal Savings Allowance and Dividend Allowance
• Earn a small amount of casual or trading income within the trading allowance (currently £1,000)
• Have already been taxed correctly through PAYE on all your income, including benefits in kind

If you’re unsure, HMRC’s online checker is the quickest way to confirm.

Self Assessment questionnaire

Run through these quick Yes/No questions. If you answer “Yes” to any of them, you likely need to file a Self Assessment tax return:

• Were you self-employed or in a business partnership at any point during the tax year?
• Did you receive rental income from property (e.g. a buy-to-let or holiday let)?
• Did your total annual income exceed the higher income threshold? (Check GOV.UK for the current figure.)
• Did you or your partner earn above the High Income Child Benefit Charge threshold while claiming Child Benefit?
• Did you receive untaxed income such as freelance fees, foreign income, or tips not processed through PAYE?
• Did you make capital gains above the annual exempt amount (e.g. selling shares, crypto, or a second home)?
• Did you receive savings interest or dividends above your tax-free allowances?
• Did you receive a “notice to file” (SA316) from HMRC?
• Do you need to claim tax relief on work expenses, pension contributions, or charitable donations?

I’m a director of a limited company. Do I still need to file a personal tax return?

Being a company director doesn’t automatically mean you need to file a personal Self Assessment tax return, but in practice, most directors do. Here’s how to work it out:

• PAYE-only salary, no other triggers. If you pay yourself only a salary through your company’s PAYE scheme, and you have no other untaxed income, no dividends, and no other Self Assessment triggers, you may not need to file. This is relatively uncommon for directors, but it’s possible.
• Dividends. Most directors take a mix of salary and dividends. If your dividends (combined with other income) push you above the Dividend Allowance, you’ll need to file. There’s no single magic number. It depends on your total income, available allowances, and the tax band your dividends fall into. Even modest dividends can trigger a filing requirement.
• HMRC notice to file. If HMRC has sent you a notice to file (SA316), you must submit a return regardless of your income situation. If you believe the notice was sent in error, contact HMRC to request its withdrawal before the deadline passes.
• Other triggers. Rental income, capital gains, foreign income, or the High Income Child Benefit Charge all apply to directors, just as they do to anyone else.

Here’s a quick comparison:

However, you still need to make sure that your company submits a corporate tax return.

How to set up Self Assessment with HMRC

If you’ve determined that you do need to file, the first step is registering for Self Assessment with HMRC. You’ll need to:

• Register online at GOV.UK (or by post using form SA1 if you’re not self-employed, or form CWF1 if you are).
• Receive your Unique Taxpayer Reference (UTR). This usually arrives by post within 10 working days.
• Set up a Government Gateway account if you don’t already have one.

Once you’re registered, you can file your return online through HMRC’s portal. Or you can save yourself the hassle and let a qualified accountant handle it for you. Taxfix connects you with accredited UK tax accountants who can file your return quickly and accurately. Learn more about filing a Self Assessment tax return with Taxfix.

How can Taxfix help with Self Assessment?

Filing a tax return doesn’t have to be stressful. Taxfix is a platform that connects you with UK-qualified tax accountants and smart digital tools to make the whole process quick, compliant, and hassle-free.

Here’s what you get:

• A dedicated, accredited accountant who reviews your situation and files your return with HMRC on your behalf.
• A simple online process. Answer a few questions, upload your documents, and your accountant takes care of the rest.
• Peace of mind that your return is accurate and submitted on time.

FAQ: Do I need to file a tax return?

Who needs to file a tax return in the UK?

Anyone with untaxed income, self-employment earnings, rental income, capital gains above the annual exempt amount, foreign income, or income above certain thresholds. You also need to file if HMRC sends you a notice to file or if you need to pay the High Income Child Benefit Charge.

What happens if I don’t file a tax return?

If you’re required to file and miss the deadline, HMRC will charge an automatic £100 late-filing penalty, even if you owe no tax. Further penalties and interest build up the longer you leave it: after three months, daily penalties can apply; after six and twelve months, additional percentage-based penalties may be charged. If you’ve been sent a notice to file and ignore it, HMRC can also estimate your tax bill and pursue collection.

When should I file a tax return in the UK?

The UK tax year runs from 6 April to 5 April. You should file your return after the tax year ends. The paper deadline is 31 October, and the online deadline is 31 January of the following year. For example, for the 2024/25 tax year, you must file online by 31 January 2026. Filing early gives you more time to budget for any tax owed.

What is the minimum income to file a tax return?

There is no single “minimum income” figure that triggers a tax return. It depends on the type of income you receive and whether it has already been taxed. For self-employment, you must register and file if your gross income exceeds the HMRC threshold (check GOV.UK for the current figure). For employed individuals, you generally don’t need to file if all your income is taxed through PAYE, unless another trigger applies, such as the High Income Child Benefit Charge or capital gains.