Martin Lewis has issued a crucial tax code alert for individuals in the UK earning above £12,570 annually, warning that incorrect codes could lead to significant financial losses. The Money Saving Expert founder delivered this alert on a BBC Sounds podcast episode.
A UK tax code, a combination of numbers and letters, determines the amount of income tax to be deducted from an individual’s salary or pension by HM Revenue and Customs (HMRC). It indicates the tax-free income threshold for the year.
Once surpassing the Personal Allowance of £12,570 in the 2025/26 tax year, individuals in the UK commence paying Income Tax. Earnings between £12,571 and £50,270 incur a 20% Basic Rate tax, with higher rates applicable beyond that range.
Encouraging millions of UK residents to take immediate action, Martin Lewis emphasized the importance of verifying their tax codes promptly. He stressed that individuals are personally responsible for ensuring the accuracy of their tax codes, as errors could result in overpayment of taxes.
Lewis explained that a standard tax code, like 1257L, signifies a tax-free allowance of £12,570 annually. Incorrect tax codes could lead to excessive tax payments, potentially causing financial strain. Regularly reviewing and correcting tax codes is crucial to avoid unexpected tax bills or refunds.
It is essential to monitor your tax code regularly to prevent under or overpayment of income tax, as discrepancies can arise due to changes such as multiple employments or benefits. Checking and correcting your tax code ensures accurate tax deductions from your paycheck, preventing financial discrepancies.
Martin Lewis cautioned that underpaying taxes due to incorrect tax codes could lead to substantial tax bills in the future, causing financial difficulties. He advised individuals to utilize free online tax code calculators to verify their codes annually.
Changes in life circumstances, such as new employments, benefits, pensions, or utilizing Marriage Allowance, can prompt adjustments to tax codes. Individuals should ensure their tax codes align with their current situation, as inaccuracies could stem from errors made by HMRC.
You can locate your tax code on pay stubs, correspondence from HMRC, or in your Personal Tax Account on the GOV.UK website. Regularly monitoring and updating your tax code is crucial to ensure accurate tax deductions and avoid financial discrepancies.