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When you start a new job, receive a pension, or change employment, you’ll likely notice a tax code on your payslip. Although, to many, this code looks like a random combination of letters and numbers it is actually the crucial piece of information that determines how much tax is deducted from your income. Understanding your tax code will empower you to check that you’re paying the correct amount of tax and, if necessary, correct the code with HMRC.
A tax code is used by your employer or pension provider to calculate how much income tax to deduct from your pay or pension. It’s based on your Personal Allowance (the amount you can earn tax-free each year) and any other factors that affect your tax situation, such as additional income or benefits.
For the 2024/25 tax year, the standard Personal Allowance is £12,570 and will remain at this level for the 2025/6 tax year. This means most people can earn up to this amount without paying income tax.
Common codes can be broken down into three main categories:
The term ‘Emergency Tax Code’ is often misunderstood. This code is most often used when HMRC does not have the information to calculate the correct tax code for an individual and should be corrected when the information does become available.
Usually the code 1257L W1/M1 is used which means that the Personal Allowance is being applied. The main difference is that tax is calculated on a weekly (W1) or monthly (M1) basis rather than cumulatively. You would most usually see this if you’ve started a new job and your previous tax details are not yet available
0T W1/M1
is another emergency tax code but this means that no Personal Allowance is being applied, leading to higher tax deductions.
There are a number of letters that may also be applied to a tax code:
Your tax code will appear on your payslip, P60, or P45. If you think your tax code is incorrect, you can:
Getting your tax code right is essential to ensure you’re not overpaying or underpaying tax. An incorrect tax code could lead to an unexpected tax bill or a delay in receiving a refund. By understanding your tax code, you can take control of your finances and avoid unnecessary stress.
Tax codes can be confusing, especially if you have multiple income sources or complex financial arrangements. At MPower Accounting, we’re here to help! Our team of experts can guide you through your tax obligations, ensure your tax code is correct, and help you maximise your income.
Contact MPower Accounting today for personalised advice and support. Let us take the stress out of tax so you can focus on what matters most.
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