Income Tax

Self-assessment taxpayers typically need to pay their Income Tax liabilities in three instalments each year. The first two payments on account are due by 31 January during the tax year and by the 31 July after the tax year has ended. Each payment on account is based on 50% of the previous year’s net Income Tax liability. Additionally, the third (or balancing) payment is due on 31 January after the tax year ends.

If you expect your income for the following tax year to be lower than the previous year, you can apply to reduce your payments on account. This can be done through HMRC’s online service or by submitting form SA303.

It’s important to note that you do not need to make payments on account if your net Income Tax liability for the previous year is less than £1,000, or if more than 80% of your tax liability was collected at source.

There is no limit on the number of times you can apply to adjust your payments on account. If your liability for 2024-25 is lower than for 2023-24, you can request HMRC to reduce your payments. The deadline to submit a claim to reduce your payments on account for 2024-25 is 31 January 2026.

If your taxable profits have increased, there is no obligation to inform HMRC, but your final balancing payment will usually be higher.

The deadline for submitting paper self-assessment tax returns for the 2023-24 tax year is 31 October 2024. Late submission of a self-assessment return will generate a £100 late filing penalty. The penalty usually applies even if there is no liability or if any tax due is paid in full by 31 January 2025.

Daily penalties of £10 per day will also take effect if the tax return is still outstanding three months after the filing date up to a maximum of £900. Additional higher penalties will be incurred if the return remains outstanding after six and twelve months.

We would recommend that anyone still submitting paper tax returns consider the benefits of submitting the returns electronically. This would allow for an additional three months until 31 January 2025 in which to submit a return.

In addition, you must inform HMRC by 5 October 2024 if you need to complete a tax return for the 2023-24 tax year and have not done so before. Failure to do so could result in a fine.

Self-assessment taxpayers are usually required to pay their Income Tax liabilities in three instalments each year. The first two payments are due on 31 January during the tax year and 31 July following the tax year.

These payments on account are based on 50% each of the previous year’s net income tax liability. In addition, the third (or only) payment of tax will be due on 31 January following the end of the tax year. If you think that your income for the next tax year will be lower than the previous tax year, you can apply to have your payment on account reduced. This can be done using HMRC’s online service or by completing form SA303.

It is important to note that you do not need to make any payments on account where your net Income Tax liability for the previous tax year is less than £1,000 or if more than 80% of that year’s tax liability has been collected at source.

There are no restrictions on the number of claims to adjust payments on account a taxpayer or agent can make. The payments are based on 50% of your previous year’s net income tax liability. If your liability for 2023-24 is lower than 2022-23 you can ask HMRC to reduce your payment on account. The deadline for making a claim to reduce your payments on account for 2023-24 is 31 January 2025.

If taxable profits have increased there is no requirement to notify HMRC although the final balancing payment will be higher.

In a recent press release, HMRC addressed some common misconceptions about who needs to file a self-assessment return before the 31 January 2025 deadline and clarifies some of the most widespread myths.

The press release seeks to dispel the following myths:

Myth 1: “HMRC hasn’t been in touch, so I don’t need to file a tax return.”

Reality: It is the individual’s responsibility to determine if they need to complete a tax return for the 2023 to 2024 tax year. There are many reasons why someone might need to register for self-assessment and file a return, including if they:

• are newly self-employed and have earned gross income over £1,000;
• earned below £1,000 and wish to pay Class 2 National Insurance Contributions voluntarily to protect their entitlement to State Pension and certain benefits;
• are a new partner in a business partnership;
• have received any untaxed income over £2,500; or
• receive Child Benefit payments and need to pay the High Income Child Benefit Charge because they or their partner earned more than £50,000 (this limit increases to £60,000 for 2024-25).

Myth 2: “I have to pay the tax at the same time as filing my return.”

Reality: False. Even if someone files their return today, the deadline for customers to pay any tax owed for the 2023-24 tax year is 31 January 2025.

Myth 3: “I don’t owe any tax, so I don’t need to file a return.”

Reality: Even if a taxpayer does not owe tax, they may still need to file a self-assessment return to claim a tax refund, claim tax relief on business expenses, charitable donations, pension contributions, or to pay voluntary Class 2 National Insurance Contributions to protect their entitlement to certain benefits and the State Pension.

Myth 4: “HMRC will take me out of self-assessment if I no longer need to file a return.”

Reality: It is important taxpayers tell HMRC if they have either stopped being self-employed or they don’t need to fill in a return, particularly if they have received a notice to file. If not, HMRC will keep writing to them to remind them to file their return and we may charge a penalty.

Taxpayers may not need to complete a tax return if they have stopped renting out property, no longer need to pay the High Income Child Benefit Charge, or their income has dropped below the £150,000 threshold and have no other reason to complete a tax return.

Myth 5: “HMRC has launched a crackdown on people selling their possessions online and now I will have to file a self-assessment return and pay tax on the items I sold after clearing out the attic.”

Reality: Despite speculation online earlier this year, tax rules have not changed in this area. If someone has sold old clothes, books, CDs and other personal items through online marketplaces, they do not need to file a self-assessment return and pay Income Tax on the sales. 

It should be noted that you are required to notify HMRC by 5 October 2024 if you need to submit a self-assessment tax return for the 2023-24 tax year and haven't done so previously.

The mandatory rollout of Making Tax Digital for Income Tax (MTD for ITSA) is scheduled to begin in April 2026. The process will significantly adjust how businesses, self-employed individuals, and landlords engage with HMRC. The system will require businesses and individuals to register, file, pay, and update their details through an online tax account.

It is important to begin to consider using accounting software that is equipped to send updates to HMRC in preparation for the launch of MTD for ITSA in April 2026.

According to HMRC, the software must be capable of:

• creating and storing digital records of your business income and expenses — you can choose to use spreadsheets with compatible software to do this;
• sending quarterly updates;
• submitting your tax return by 31 January after the end of the year; and
• receiving information from HMRC.

The MTD for ITSA rules will initially apply to businesses, self-employed individuals and landlords with an income of over £50,000 annually. MTD for ITSA will then be extended to those with an income between £30,000 and £50,000 from 6 April 2027. A new system of penalties for the late filing and late payment of tax for ITSA will also apply. At present there are no plans to extend ITSA to smaller businesses with income below £30,000 or to Corporation Tax.

Readers affected by this forthcoming change who have not yet converted to the use of an MTD compatible accounting software should consider their options, and we can help. Please call.

The deadline for submitting paper self-assessment tax returns for the 2023-24 tax year is 31 October 2024. If the return is submitted late, a £100 penalty will be imposed, regardless of whether there is a tax liability or if any owed tax is fully paid by 31 January 2025.

We recommend that taxpayers still using paper returns consider switching to electronic submission, which offers an additional three months (until 31 January 2025) to file their self-assessment tax return.

Taxpayers with certain underpayments in the 2023-24 tax year can elect to have this amount collected via their tax code (in 2025-26), provided they are in employment or in receipt of a UK-based pension. The coding applies to certain debts and the amount of debt that can be coded out ranges from £3,000 to £17,000 based on a graduated scale. The maximum coding out allowance applies to taxpayers with earnings exceeding £90,000.

Daily penalties of £10 per day will also take effect if the tax return is still outstanding three months after the filing date up to a maximum of £900. If the return still remains outstanding further higher penalties will be charged from six months and twelve months late.

You must inform HMRC by 5 October 2024 if you need to complete a tax return for the 2023-24 tax year and have not done so before.

There is an online tool available on GOV.UK that allows taxpayers to check if they need to advise HMRC about additional income they receive. The online tool can be found at https://www.tax.service.gov.uk/guidance/check-non-paye-income/start/how-did-you-receive-additional-income

Additional income could be generated by:

• selling things, for example at car boot sales or auctions, or online;
• doing casual jobs such as gardening, food delivery or babysitting;
• charging other people for using your equipment or tools;
• renting out property or part of your home, including for holidays (for example, through an agency or online); or
• creating content online, for example on social media.

In most cases, these types of income are taxable. However, there are two separate annual £1,000 tax allowances available for property and trading income. If you receive either type of income listed (property or trading income), you can claim a £1,000 allowance for each. The online tool will help determine if this applies to you.

Where each respective allowance covers all the individual’s relevant income (before expenses) the income is tax-free and does not have to be declared. Taxpayers with higher amounts of income will have the choice, when calculating their taxable profits, of deducting the allowance from their receipts, instead of deducting the actual allowable expenses.

Changes to the High Income Child Benefit Charge (HICBC) came into effect on 6 April 2024. The income threshold at which HICBC starts to be charged increased to £60,000 (from £50,000).

The charge is calculated at 1% of the full Child Benefit award for every £200 (2023-24: £100) of income between £60,000 and £80,000. (2023-24: between £50,000 and £60,000). For taxpayers with income above £80,000 (2023-24: £60,000) the amount of the charge is the same as the amount of Child Benefit received. The HICBC therefore either reduces or removes the financial benefit of receiving Child Benefit.

For new Child Benefit claims made after 6 April 2024, any backdated payment will be treated for HICBC purposes as if the entitlement fell in the 2024-25 tax year if backdating would otherwise create a HICBC liability in the 2023-24 tax year.

Even if HICBC applies to you or your partner, it’s generally still beneficial to claim Child Benefit as doing so can safeguard certain benefits and ensure your child receives a National Insurance number. Claims can be made by using the HMRC app or online resources. New claims are automatically backdated for up to 3 months or to the child’s birth date if later.

Taxpayers can choose to continue receiving Child Benefit – and pay the tax charge – or opt to stop receiving benefits and avoid the charge.

HMRC’s Personal Tax Accounts (PTAs) serve as an online tool that enables taxpayers to view and update their information in real time. The PTA can be used for many routine requests and services and help you bypass the need to call or write to HMRC.

Every individual in the UK that pays tax has a PTA, but taxpayers must sign up in order to access and use the service. This can be achieved by using the Government Gateway. You may need to verify your identify when using the service.

The following services are currently available on your PTA:

• check your Income Tax estimate and tax code
• fill in, send and view a personal tax return
• claim a tax refund
• check your Child Benefit
• check your income from work in the previous 5 years
• check how much Income Tax you paid in the previous 5 years
• check and manage your tax credits
• check your State Pension
• check if you’ll benefit from paying voluntary National Insurance contributions and if you can pay online
• track tax forms that you’ve submitted online
• check or update your Marriage Allowance
• tell HMRC about a change of name or address
• check or update benefits you get from work, for example company car details and medical insurance
• find your National Insurance number
• find your Unique Taxpayer Reference (UTR) number
• check your Simple Assessment tax bill

The PTA is a key component of HMRC’s broader strategy to transition to a fully digital tax service.

You may be able to have tax underpayments collected via your tax code when you are in employment or in receipt of a company pension. Instead of paying off debts in a lump sum, money is collected in equal monthly instalments over the tax year.

You can pay your self-assessment bill through your PAYE tax code as long as these conditions apply:

• You owe less than £3,000 on your tax bill (you cannot make a part payment to meet this threshold).
• You already pay tax through PAYE, for example you are an employee, or you receive a company pension.
• You submitted your paper tax return by 31 October or your online tax return online by 30 December. This means that that for the 2023-24 tax year you have until 30 December 2024 to file your online self-assessment returns in order to have the monies collected in the 2025-26 tax year starting on 6 April 2025.

HMRC will automatically collect what you owe through your tax code if you meet the three conditions set out above unless you have specifically asked them not to (on your tax return).

You will not be able to pay your tax bill through your PAYE tax code if:

• You do not have enough PAYE income for HMRC to collect it.
• You had paid more than 50% of your PAYE income in tax.
• You had ended up paying more than twice as much tax as you normally do.
• You owed £3,000 or more but made a part payment to reduce the amount you owe to less than £3,000.