There are now less than 2 months to the self-assessment filing deadline for submissions of the 2024-25 tax returns. We urge our readers who have not yet completed and filed their 2024-25 tax return to file as soon as possible to avoid the stress of last-minute preparations as the 31 January 2026 deadline fast approaches.

You should also be aware that payment of any tax due should also be made by this date. This includes the remaining self-assessment balance for the 2024-25 tax year, and the first payment on account for the 2025-26 tax year.

Earlier this year, more than 11.5 million people submitted their 2023-24 self-assessment tax returns by the 31 January deadline. This included 732,498 taxpayers who left their filing until the final day and almost 31,442 that filed in the last hour (between 23:00 and 23:59) before the deadline!

There is a new digital PAYE service for the High Income Child Benefit Charge (HICBC). This allows Child Benefit claimants who previously used self-assessment solely to pay the charge to opt out and instead pay it through their tax code.

If you are filing online for the first time you should ensure that you register to use HMRC’s self-assessment online service as soon as possible. Once registered an activation code will be sent by mail. This process can take up to 10 working days. 

If you miss the filing deadline you will be charged a £100 fixed penalty (unless you have a reasonable excuse) which applies even if there is no tax to pay, or if the tax due is paid on time. There are further penalties for late tax returns still outstanding 3 months, 6 months and 12 months after the deadline. There are additional penalties for late payment of tax amounting to 5% of the tax unpaid at 30 days, 6 months and 12 months.

HMRC has published a new Making Tax Digital newsletter. This newsletter is mainly intended for taxpayers and agents who are currently testing the Making Tax Digital for Income Tax (MTD for IT) system. MTD for IT will become mandatory in phases from April 2026.

For nearly two years, HMRC has been stress-testing its MTD for IT systems to ensure they can support increasing numbers of volunteer taxpayers. So far, HMRC has confirmed that testing has successfully deal with:

• The sign-up process works for individuals and agents, including those with non-standard accounting periods.
• Volunteers can make and edit quarterly submissions and add income sources.
• Volunteers can opt out of quarterly obligations.
• PAYE income pre-populates into estimated payments on account.
• Payments are correctly allocated within MTD for IT.

More recent testing in 2025 as HMRC scales up the rollout include:

April–June 2025

• Re-testing sign-up to confirm it can cope with larger volumes.
• Testing the ability for volunteers to appoint multiple agents (one for quarterly returns and one for end-of-year submissions).

July–September 2025

• Ensuring taxpayers and agents can make their first quarterly update via software completing the quarterly requirement.
• Checking the accuracy of estimated payments on account based on income to date.
• Testing key functions in the digital tax account, such as adding or stopping income sources and opting in or out of the service.

During the testing phase, there are no penalties for late submissions, but submitting on time is encouraged by HMRC as it helps those testing the system understand the requirements and allows for the service to be properly stress tested.

If your qualifying income is over £50,000 in the 2024–2025 tax year, you will be required to start using MTD for IT from 6 April 2026. There are some minimal exemptions in place.

The chancellor Rachel Reeves announced as part of the Autumn Budget measures that the Income Tax thresholds will be maintained at their current levels for a further three years until April 2031. This will see the personal tax allowance frozen at £12,570 through to April 2031 across the UK. In addition, the higher rate threshold will remain at £50,270 (there are differences in Scotland). National Insurance thresholds will also remain frozen until 2031.

This means that more taxpayers will be pushed into paying higher taxes as income increases at a far faster rate than the frozen tax bands. This phenomenon is known as fiscal drag. The freezing of most of the Income Tax allowance and rates at current levels until 2031 means that many taxpayers will pay more Income Tax as their income increases with no corresponding increases in their allowances and more taxpayers will see their taxable income boosted into the 40%, or 45%, Income Tax bands.

The existing thresholds for the basic rate, higher rates and additional rates of tax have also been frozen where income is derived from employment or self-employment. However, the government will create separate tax rates for property, savings & dividend income.

• Tax on most dividend income will increase by 2% from April 2026. The ordinary rate will rise from 8.75% to 10.75%, and the upper rate from 33.75% to 35.75%. The additional rate will remain unchanged at 39.35%.

The changes to the tax rates for property and savings income will take effect from April 2027.

• From 2027-28, the property basic rate will be 22%, the property higher rate will be 42%, and the property additional rate will be 47%. These rates will apply across England, Wales and Northern Ireland.
• From 2027-28, the savings basic rate will be increased to 22%, the savings higher rate will be increased to 42% and the savings additional rate will be increased to 47%.

The current rules that allow Basic Rate taxpayers to receive £1,000 of interest without paying tax, and Higher Rate taxpayers to receive £500 without paying tax are set to remain as is the Starting Rate for Savings of up to £5,000 for lower earners.

If you earn fees or sell goods as a side hustle, you may need to pay tax on your profits.

HMRC has launched a new press release encouraging Christmas crafters and anyone with a fee earning hobby to check their tax reporting obligations as part of its Help for Hustles campaign. This is relevant to individuals earning extra income, whether from crafting Christmas decorations, selling festive items at market stalls, or upcycling furniture for seasonal sales. Those earning more than £1,000 in total from these activities may need to report their earnings to HMRC.

To help these side hustlers navigate their tax obligations, HMRC has introduced an online checker tool that helps individuals determine whether or not they need to declare additional income.

There are two £1,000 tax allowances available for small amounts of miscellaneous income: one for trading income and one for property income. Taxpayers who have both types of income can claim £1,000 for each.

• Trading Allowance: If a taxpayer makes up to £1,000 from self-employment (e.g., craft sales or content creation), this income is tax-free and doesn’t need to be declared. However, the £1,000 threshold applies to all combined trading activities. For example, if someone earns £600 from craft sales and £500 from content creation, their total trading income exceeds £1,000 and must be reported to HMRC.
• Property Allowance: If a taxpayer earns £1,000 or less from property-related activities (e.g., renting out a driveway), they don’t need to report this income to HMRC or include it in their tax return.

These allowances cover all relevant income before expenses. If a taxpayer's income is under £1,000, it’s tax-free. If they earn more than £1,000, they can either deduct the £1,000 allowance from their income or list their actual expenses when calculating taxable profit.

However, if side hustle income exceeds £1,000 in a tax year, taxpayers may need to complete a Self-Assessment tax return. This also includes income from cryptoassets. Importantly, this requirement applies only to active trading or selling services. If someone is just clearing out old items, there is usually no need to worry about tax.

For the 2024-25 tax year, the deadline to submit a tax return online and pay any tax owed is 31 January 2026.

Making Tax Digital for Income Tax (MTD for IT) will become mandatory in phases from April 2026. If you are self-employed or a landlord and have over £50,000 in qualifying income you need to start preparing to submit quarterly updates, keeping digital records and cope with a new penalty system.

Your qualifying income is the total income you receive in a tax year from self-employment and property. Other income, such as from employment (PAYE), partnerships or dividends (including from your own company), do not count towards your qualifying income.

HMRC will calculate your qualifying income based on your self-assessment tax return you submitted in the previous year. For example, to assess your income for the 2026-2027 tax year, they will use the return you submit for the 2024-2025 tax year which is due to be submitted by 31 January 2026. If your qualifying income is over £50,000, HMRC will inform you when you need to start using MTD for IT.

Qualifying income includes your share of income from jointly owned property, certain trusts, VAT-registered businesses and disguised investment management fees. It does not include business partnership income, transition profits or qualifying care relief payments.

Initially, MTD for IT will only apply to self-employed individuals, and landlords with an annual qualifying income exceeding £50,000. From 6 April 2027, the rules will extend to those with a qualifying income between £30,000 and £50,000. From April 2028, sole traders and landlords with qualifying income over £20,000 will need to follow MTD rules. The government is also exploring ways to bring those earning under £20,000 within the MTD framework at a future date.

For the current tax year, taxpayers with adjusted net income between £100,000 and £125,140 will face an effective marginal tax rate of 60%, as their £12,570 tax-free personal allowance is gradually withdrawn.

If a taxpayer earns over £100,000 in any tax year, their personal allowance is gradually reduced by £1 for every £2 of adjusted net income exceeding £100,000. This ceiling applies regardless of age, meaning that any taxable receipt that pushes their income above this threshold will lead to a reduction in their personal tax allowances. If their adjusted net income reaches £125,140 or more, the personal Income Tax allowance will be reduced to zero.

Adjusted net income refers to a taxpayer’s total taxable income before personal allowances, minus certain tax reliefs such as trading losses, charitable donations, and pension contributions.

Taxpayers in this income band should consider financial planning strategies to avoid this "personal allowance trap." Reducing income below £100,000 could be achieved by utilising options like increasing pension contributions, making charitable donations, or participating in certain investment schemes.

For higher-rate or additional-rate taxpayers seeking to reduce their tax bill, gifting to charity is one strategy. Donations made in the current tax year can be carried back to the 2024-25 tax year, provided the taxpayer requests the carry-back before or at the same time as submitting their self-assessment return, but no later than 31 January 2026.

Married couples and civil partners could save up to £252 a year by transferring part of one partner’s unused personal allowance to the other, but you may need to cancel the claim if your income or relationship status changes.

The Marriage Allowance applies to married couples and civil partners where one partner does not pay tax or does not pay tax above the basic rate threshold for Income Tax (i.e., one partner must earn less than the £12,570 personal allowance for 2025-26).

The allowance allows the lower-earning partner to transfer up to £1,260 of their unused personal tax-free allowance to their spouse or civil partner. The transfer can only be made if the recipient (the higher-earning partner) is taxed at the basic 20% rate, which typically means they have an income between £12,571 and £50,270. For those living in Scotland, this would usually apply to an income between £12,571 and £43,662.

By using the allowance, the lower-earning partner can transfer up to £1,260 of their unused personal allowance, which could result in an annual tax saving of up to £252 for the recipient (20% of £1,260).

However, it is important to be aware you must cancel the Marriage Allowance if your circumstances change and any of the following apply:

• your relationship ends – because you have divorced, ended (‘dissolved’) your civil partnership or legally separated;
• your income changes and you are no longer eligible; or
• you no longer want to claim.

As of April 2025, directors of close companies and self-employed taxpayers face new mandatory reporting requirements on their Self-Assessment returns.

Up to 900,000 company directors and 1.2 million taxpayers carrying on a trade will be impacted by new rules that require them to provide more information when filing their 2025-26 self-assessment returns.

Legislation has been enacted that introduces mandatory reporting obligations for certain taxpayers, including those who begin or cease trading and directors of close companies. These measures came into effect on 5 April 2025 and apply for the current 2025-26 tax year and later tax years.

Company directors of close companies will face new reporting requirements. Most small private companies will meet the definition of a close company and there are some specific tax rules that apply to these companies. From 5 April 2025, taxpayers impacted by the change must confirm whether they are directors of a close company and provide further details, including the company’s name and registered number, the value of dividends received and their percentage shareholding in the company. If shareholding changes during the year, the highest percentage held must be reported. Answering these questions will be mandatory when submitting 2025-26 tax returns and beyond.

The new rules also introduce a mandatory requirement to report the start or cessation of a trade that was previously a voluntary requirement. Taxpayers are now required to include the date of commencement or cessation of their business in their tax return, whether for personal tax, partnerships or trustees. This change applies to tax returns for 2025-26 and beyond.

Paper tax returns are due 31 October 2025, and new registrants must notify HMRC by 5 October 2025. Act early to avoid penalties.

Firstly, the deadline for submitting paper self-assessment tax returns is 31 October 2025. If you miss this deadline a £100 late filing penalty will usually apply, even if no tax is due, or if any tax owed is paid in full by the final deadline of 31 January 2026.

Further penalties increase the longer the return remains outstanding. If your return is still not filed three months after the deadline, daily penalties of £10 per day (up to a maximum of £900) will be charged. If the delay extends to six months or more, further fixed or percentage-based penalties may apply, significantly increasing the cost of non-compliance.

We strongly recommend that anyone still submitting paper returns consider switching to the online filing system. Filing electronically not only simplifies the process but also gives you an extra three months, with the deadline for online returns falling on 31 January 2026.

The second key deadline is 5 October 2025. This is the date by which you must notify HMRC if you need to complete a self-assessment return for the 2024–25 tax year and have not previously been required to file one. Failing to register in time can lead to penalties for late notification, even if you file your return on time later.

Being aware of these October deadlines and taking timely action can help you avoid unnecessary stress and potential fines if you were unprepared.

Homeowners can earn up to £7,500 tax-free under the rent-a-room scheme, with simple reporting and flexible tax options.

This set of special rules is designed to encourage individuals to make use of spare space in their property by providing a tax exemption on rental income of up to £7,500 per tax year.

If the total rental income from lodgers does not exceed the £7,500 threshold, the exemption applies automatically, with no need to file a tax return or report the income to HMRC. This makes the scheme particularly appealing for those seeking a simple way to supplement their income without added paperwork. However, if you prefer, you can opt out of the scheme and instead declare property income and expenses in the usual way.

The relief is only available for furnished accommodation and typically applies when a homeowner rents out a bedroom to a lodger within their main residence. One of the key benefits of the scheme is that it not only allows for tax-free earnings up to the threshold but also reduces the overall tax and administrative burden for participants. If the property is jointly owned and both parties receive rental income, the £7,500 limit is halved to £3,750 per person.

It is important to note that the rent-a-room limit covers not just rent, but also any additional payments received for meals, laundry, or cleaning services provided to the lodger. If your gross receipts exceed the threshold, you have a choice: you can either pay tax on the actual profit (gross rents minus allowable expenses and capital allowances) or choose to be taxed on the total gross receipts minus the £7,500 allowance, with no deduction for expenses or allowances. This flexibility helps taxpayers to choose the most tax-efficient method depending on their specific circumstances.