Millions of UK Taxpayers Overpaid £3.5 Billion Due to PAYE Errors
British workers may have inadvertently paid excessive amounts of income tax to HMRC, with experts now urging immediate checks to determine if individuals are owed refunds. Approximately 5.6 million taxpayers across the United Kingdom are estimated to have overpaid a staggering £3.5 billion during the 2023-24 financial year, primarily due to inaccuracies in their PAYE tax codes. This widespread issue affects both employees and freelancers, many of whom remain unaware as the additional tax is automatically deducted from their salaries.
How Tax Code Mistakes Occur and Accumulate
HMRC utilises tax codes to calculate the precise amount of income tax that should be withheld from an individual's earnings. However, when HMRC's records are incorrect or outdated, employees can find themselves paying either too much or too little tax each month. Common triggers for these errors include changing employers, holding multiple income streams, or receiving employment benefits such as company vehicles or private medical insurance.
Lee Murphy, managing director of The Accountancy Partnership, highlighted that many people assume their tax deductions are accurate simply because they occur automatically through payroll systems. He explained, "Tax codes are based on the information HMRC has about your circumstances. If that information is wrong or hasn't been updated, you could be overpaying tax without realising it." Since the PAYE system operates seamlessly through payroll, mistakes can go undetected for extended periods, allowing even minor discrepancies to accumulate into substantial overpayments over time.
Steps to Verify Your Tax Code and Reclaim Overpayments
Employees are strongly encouraged to take a few minutes to review their tax code, particularly if their personal or financial situation has changed in the past year. Mr Murphy emphasised, "It's something you're going to want to sort out straight away so you're not out of pocket. Checking your tax code only takes a few minutes and could save you money." HMRC typically updates tax codes using data provided by employers or taxpayers, but delays or inaccuracies in this information can lead to incorrect deductions.
The simplest method to verify your tax status is to examine your payslip. After noting your Personal Allowance tax code, you can visit the GOV.UK website and access the online "Check your Income Tax for the current year" service. This platform, applicable to the current tax year, allows you to confirm your tax code and Personal Allowance, and identify any recent alterations. Additionally, it provides an estimate of your total tax liability for the entire tax year, though it is not accessible to self-employed individuals who pay tax solely through Self Assessment.
Understanding Tax Code Numbers and Letters
The numerical component of an employee's tax code indicates the amount of tax-free income they are entitled to in that tax year, known as the Personal Allowance. To calculate this, multiply the number by 10. For example, an employee with the tax code 1257L can earn up to £12,570 before income tax applies. If their annual income is £30,000, the taxable amount would be £17,430.
The letters in a tax code correspond to an individual's circumstances and how these affect their Personal Allowance. Common letters include:
- L - Entitles the employee to the standard tax-free Personal Allowance.
- S - Denotes an employee whose primary residence is in Scotland.
- BR/SBR - Used for a secondary job or pension.
- M - Applies if a spouse or civil partner has transferred some of their Personal Allowance.
- N - Refers to an employee who has transferred some of their Personal Allowance to their partner.
- T - Used when HMRC needs to review specific items with the employee.
If your tax code ends with 'W1', 'M1', or 'X', these are emergency tax codes, such as '577L W1' or '577L M1'. Tax codes beginning with 'K' indicate that you have untaxed income exceeding your tax-free allowance, often due to repaying prior tax debts through wages or pension, or receiving taxable benefits like state or company benefits. In such cases, your employer or pension provider deducts the tax due on this untaxed income from your earnings.
