Do I Need to Complete a Tax Return? And How to Cancel One

You need to complete a tax return if HMRC has sent you a notice to file, or if you meet HMRC’s Self Assessment criteria. Those criteria include self-employment income over £1,000 and rental income above the property allowance. If your only income is taxed through PAYE and none apply, you almost certainly don’t need to file.

HMRC’s online checker confirms your position, and if you do need to register, the deadline is 5 October following the end of the tax year.

Self Assessment exists to catch the tax that PAYE can’t. If you’re paid entirely through an employer’s payroll, HMRC already collects what it needs before your wages arrive. Rental income, dividends, and self-employed profits don’t work that way, and HMRC needs you to report them.

That’s why the criteria look so scattered: each one plugs a different gap, from the £1,000 trading allowance for a small side hustle to the income threshold that triggers the child benefit charge.

Circumstances change too. A landlord sells a property, a side business closes, income drops below a threshold. When they do, you’re not stuck filing indefinitely.

HMRC can withdraw the requirement, provided you ask within the right window. What follows sets out exactly which situations count, what’s changing under Making Tax Digital, and how to stop filing once a return no longer applies to you.

Why wouldn’t I need to complete a tax return?

Common reasons for not needing to complete a tax return include no longer being:

• A self-employed sole trader.
• A partner in a partnership business.
• A landlord with rental income above the property allowance.
• In receipt of employment expenses worth £2,500 or more.

The main reasons for having to complete a tax return are:

• You’re a self-employed sole trader with gross trading income over the £1,000 trading allowance.
• You’re a partner in a self-employed partnership business.
• You’re a limited company director with untaxed income, such as dividends above the dividend allowance. Directors aren’t automatically in Self Assessment just by holding the role.
• Your income from savings and investments is £10,000 or higher before tax.
• You’re employed and have work-related expenses of over £2,500 in a tax year, meaning you can claim tax relief on them.
• You have work-related expenses, such as mileage, worth over £2,500 in your tax code.
• You’re a landlord resident in the UK, or a non-resident landlord, with rental income above the property allowance.
• You’re a UK non-resident taxpayer with UK income to declare.
• You receive other untaxed income that can’t be collected through PAYE: income from an online side hustle selling on Amazon or eBay, for instance.
• You receive annual income from a trust, settlement, or a deceased person’s estate under the terms of a will, which may carry further tax due.

It’s worth knowing that meeting one of these criteria means you’re expected to file whether or not you actually owe any tax. HMRC’s rules don’t carve out an exemption for a nil bill.

If your trading income clears the £1,000 allowance, for example, you’re normally still expected to register and file even in a year where your profit turns out too small to be taxable.

Recent changes affecting who needs to file

A few developments have shifted who needs to complete a tax return, and it’s worth checking against the current rules rather than assuming last year’s answer still applies.

The High Income Child Benefit Charge (HICBC) applies once you or your partner earn over £60,000 a year and receive Child Benefit. Until recently, paying the charge meant registering for Self Assessment. HMRC has since introduced a PAYE-based option, so some people affected by HICBC can now settle the charge through their tax code instead, meaning it’s possible to stop filing a return for this reason alone if you switch to the new service.

Capital Gains Tax is a separate trigger from income. If you’ve sold an asset (a second property, shares outside an ISA, or similar) and your gain is above the tax-free allowance, you may need to report it through Self Assessment even if none of the income-based criteria apply to you.

Pensioners aren’t automatically outside the system. If your combined income from the State Pension, a private pension, and any savings or investment income takes you over your personal allowance or into one of the criteria above, Self Assessment can still apply, regardless of your age.

The £1,000 trading and property allowances mean small amounts of income don’t need reporting. If your gross self-employment income or your gross rental income stays under £1,000 in a tax year, you generally don’t need to register for that reason alone.

Simple Assessment is a separate HMRC process for collecting tax that can’t be gathered through PAYE or a full Self Assessment return, for example some State Pension or employment income combinations. If HMRC sends you a Simple Assessment, it isn’t the same as being asked for a full tax return, and it doesn’t necessarily mean you need to register for Self Assessment.

Making Tax Digital for Income Tax is the biggest structural change on the horizon. Since 6 April 2026, sole traders and landlords with qualifying income over £50,000 report through quarterly digital updates instead of a single annual return. The threshold drops to £30,000 from April 2027 and £20,000 from April 2028. If this applies to you, GOV.UK’s Making Tax Digital eligibility guidance sets out exactly what’s required.

HMRC’s check-if-you-need-a-tax-return tool

The HMRC check if you need a tax return tool is based online, and you don’t need any login details to access it.

The checker asks a series of straightforward questions, and you can use it as many times as you want, so making a mistake doesn’t matter.

It gives you an appropriate course of action once you’ve completed the process.

If you’re like most people with only one job under PAYE, and no extra income from other sources, it’s unlikely you’ll need to complete a tax return. That said, it’s still worth running the checker if you’re unsure, since it gives you a clear answer either way.

Cancelling a tax return you don’t need

Sometimes HMRC asks you to complete a tax return you don’t actually need. If that happens, let the tax office know as soon as you can.

You have a maximum of two years from the end of the tax year the return relates to, to make a withdrawal request.

If you’re self-employed and your profits sit below the Small Profits Threshold, it’s also worth checking what deregistering means for your State Pension record.

Voluntary Class 2 National Insurance (one of the cheapest ways to protect a qualifying year) is normally opted into through Self Assessment, so stopping your return can mean losing that route unless you arrange Class 3 contributions instead, which cost considerably more.

You can check your National Insurance record before requesting a withdrawal if this applies to you.

Don’t assume your tax return will be stopped automatically without you notifying HMRC, you need to make sure it’s formally cancelled to avoid penalties for not submitting it on time.

Even if late filing penalties have already been charged, it’s still possible to request a withdrawal. If HMRC approves it, you won’t need to file the return, any penalties already incurred for missing the deadline will be waived, and they’ll send you a letter confirming you’re no longer required to submit a tax return.

They can also refuse your request and still ask you to complete the return. If that happens, set out your change in circumstances in the additional information section when you file.

How to withdraw a tax return from HMRC

If your situation has changed and you believe you no longer need to file, HMRC gives you a few ways to let them know. You’ll need your National Insurance number and unique tax reference number (UTR) for any of them. Both are in your personal tax account or the HMRC app.

• Online: use the dedicated form, accessed through your government gateway account, or HMRC’s digital assistant for guided self assessment queries.
• By phone: call HMRC on 0300 200 3310, or +44 161 931 9070 from outside the UK, to discuss your circumstances and request cancellation.
• By post: write to Self Assessment, HM Revenue and Customs, BX9 1AS, United Kingdom.

Using HMRC’s online options is generally the quickest way to submit a cancellation request, though phone and post work too.

Still need to complete a tax return without a letter?

If you’re required to complete a tax return, HMRC will normally send a reminder letter unless you’ve signed up for digital self assessment reminders by email.

It’s worth telling HMRC as soon as you’ve moved address, so you don’t miss anything they send about Self Assessment.

If you’ve opted for electronic communication, check that the email address on file is one you use regularly.

If HMRC fails to send a letter or email for any reason, and you still meet the criteria for Self Assessment, it remains your responsibility to file on time regardless.

What to do next

If none of the criteria above apply to you and your only income is taxed through PAYE, you likely don’t need to complete a tax return.

If you’re not sure, HMRC’s online checker sets out what you need to do, and it’s free to use as often as you like.

If you’ve already received a return you don’t think you need, don’t ignore it. Contact HMRC to request a withdrawal within two years of the end of the relevant tax year, using whichever of the online, phone, or postal routes suits you.

Acting early keeps your request inside the two-year window, and if HMRC approves it, any penalties for missing the filing deadline are waived.

Key takeaways

• You need to complete a tax return if you meet any of HMRC’s Self Assessment criteria, or if HMRC has sent you a notice to file, even if you don’t think you owe tax.
• Common triggers include self-employment income over £1,000, rental income above the property allowance, savings or investment income over £10,000, and the High Income Child Benefit Charge.
• Since April 2026, sole traders and landlords with qualifying income over £50,000 report through quarterly digital updates under Making Tax Digital for Income Tax instead of a single annual return, with the threshold falling further in 2027 and 2028.
• If you no longer meet the criteria, you can ask HMRC to withdraw a tax return within two years of the end of the relevant tax year. See the Self Assessment deadlines guide for the dates that matter.
• HMRC’s online checker sets out what you need to do, and cancellation requests can be made online, by phone, or by post.

Common questions about completing a tax return

A few extra questions worth clearing up before you decide.

Do pensioners need to complete a tax return?

Reaching State Pension age doesn’t take you out of Self Assessment on its own. HMRC usually collects tax on a workplace or private pension through PAYE, in the same way it does for employment income, so a single pension is often taxed automatically without a return being needed.

Where Self Assessment tends to catch pensioners is when income comes from more than one source (the State Pension plus a private pension, plus savings interest over the £10,000 threshold, for example), because HMRC’s PAYE coding can’t always adjust for combined income in the same way it can for a single salary. Someone who reaches State Pension age partway through a tax year can also find their circumstances, and therefore their filing requirement, change mid-year.

Do I need a tax return if I earn under £1,000?

Not automatically, but it’s worth knowing the £1,000 trading allowance and the £1,000 property allowance are separate. If you have a small self-employed side income and separately rent out a room or a property, you can potentially earn up to £1,000 from each, gross, without needing to register for either.

There’s a practical exception worth knowing about, too: if your allowable expenses are higher than your income (a new venture that made a loss in its first year, for instance), filing a return anyway lets you record that loss, which can then be offset against tax in a future year. Below the allowance, filing is optional, so this is a decision worth making deliberately rather than by default.

Can I just stop doing a self assessment tax return?

Not without telling HMRC. Penalties and the obligation to file keep applying until HMRC formally agrees you’re out of the system, however clear your own reasons feel. Which process applies depends on why you’re stopping.

If you no longer meet the criteria but are still registered, that’s the withdrawal request covered earlier in this guide. If you’re stopping because you’ve ceased trading as a sole trader, that’s a different step: you tell HMRC the date your self-employment ended, usually as part of your final return, and your Self Assessment record is then closed based on that cessation date rather than a separate withdrawal request.

What happens after HMRC agrees to stop my tax return?

You’ll keep your Unique Taxpayer Reference (UTR) even after HMRC confirms you’re no longer required to file. It isn’t cancelled, just set aside, so there’s nothing to reapply for if your circumstances change again later and Self Assessment applies once more.

It’s worth checking whether stopping affects anything that was tied to your Self Assessment record, such as how you pay a High Income Child Benefit Charge or report Class 2 National Insurance. If any of those applied to you, confirm with HMRC how you’ll handle them going forward before your return is withdrawn, not after.