Why Your Tax Code Might Change

Employees, employers, and payroll teams who need to understand why a tax code might change and how to ensure it’s correct. Explains the common reasons why a tax code may change and what to do if your tax code changes unexpectedly. An incorrect tax code can result in paying too much or too little tax, which can lead to a tax bill or refund later. Checking your tax code helps ensure accurate deductions and avoids surprises. The letters in your tax code indicate whether you are entitled to the annual tax-free personal allowance. These codes are updated each year and help employers calculate how much tax should be deducted from your salary. For the current tax year, the basic personal allowance is £12,570. The tax code corresponding to this amount is 1257L, which is the most common tax code used for those with:

• One job
• No untaxed income
• No unpaid tax or taxable benefits (such as a company car)

Why Your Tax Code Might Change

HMRC updates your tax code when your circumstances change and your taxable income is affected. Some common reasons why your tax code may change include:

• Starting a new job: If you begin working for a new employer, HMRC may issue a new tax code based on your earnings, especially if they haven’t yet received your full income details.
• Receiving taxable state benefits: Certain state benefits are taxable. If you start receiving them, HMRC may adjust your tax code to account for the additional income.
• Taking on an additional job or receiving a pension: If you begin earning from another job or start drawing a pension, your tax code may be updated to reflect this extra income.
• A change to your weekly State Pension amount: If your weekly State Pension payments change, HMRC may revise your tax code to ensure the right amount of tax is collected.
• Changes to job-related benefits: If your employer informs HMRC that you have started or stopped receiving benefits like a company car or private healthcare, your tax code will likely change to reflect this.
• Claiming Marriage Allowance: If you transfer part of your Personal Allowance to your spouse or civil partner, or they transfer it to you, HMRC will adjust your code to reflect the change in allowances.
• Claiming tax-deductible expenses: If you claim tax relief on work-related expenses (like uniforms, tools, or mileage), your code might change to reduce the tax you pay during the year.

Real-world application

It is essential to check that your tax code is correct to ensure you are paying the right amount of tax. If your circumstances change and your tax code does not reflect this, it may result in overpaying or underpaying tax.

Risks and Consequences

If your tax code is incorrect, you could experience:

• Overpayment: Paying more tax than necessary, which can be refunded but might affect your cash flow.
• Underpayment: If you pay too little tax, HMRC may demand the money later, and you could face penalties or interest.

Next Steps

If you think your tax code is wrong, or if you notice a change in your pay, it’s important to check your tax code as soon as possible. Ensuring the correct tax code is applied will help avoid overpayment or underpayment of tax.

Support with Unexpected Tax Code Changes

Your tax code can change for several reasons, which can affect the amount of tax deducted from your pay. Understanding the reasons behind these changes is crucial to ensure that you don’t face unexpected deductions. Cigma Accounting, based in Fulham Broadway in London, helps individuals understand tax code changes and provides expert guidance, supported by our experienced tax accountant London services.

Changes in your tax code could be due to income shifts, adjustments in benefits, or changes in personal allowances. Individuals working or living around Parsons Green and Walham Green often need help interpreting their tax code adjustments, and with physical offices across London, Cigma Accounting offers trusted advice and reliable accounting services London to ensure that your tax code is up-to-date and correct.