HMRC Issues June Warning Ahead of Tax Record Checks Starting
HMRC has released an important update regarding tax refunds being distributed to certain taxpayers, alongside a warning about upcoming tax record checks set to commence in June. This announcement follows a social media query from a taxpayer who raised concerns about their tax code and potential overpayments.
Tax Code Changes and Refund Queries
The taxpayer in question reported that their tax code had been altered to 978XL due to an estimated underpayment of tax after starting a new job. They inquired whether their code would revert to the standard 1257L with the start of the new tax year on April 6, 2026.
HMRC responded by clarifying that any in-year adjustments to tax codes are temporary, lasting only until April 5, 2026. From April 6, 2026 onwards, tax codes should return to the full allowance, ensuring taxpayers are not unfairly penalized beyond the adjustment period.
Automatic Recalculations and Refund Process
When asked about potential overpayments due to mid-year tax code changes, HMRC explained that they will automatically recalculate the tax year for affected individuals. This process is scheduled to begin from June onwards, aiming to identify and rectify any discrepancies efficiently.
For those who suspect they are owed a refund, HMRC recommends using tools available on government websites to check eligibility and initiate reclaims. Overpayments can occur for various reasons, including excessive income tax deductions or incorrect workplace expense calculations. Pensioners may also overpay on their retirement income, highlighting the need for careful review.
Tax Calculation Letters and Communication
If an incorrect tax amount has been paid in the previous year, HMRC may issue a tax calculation letter, such as a P800, or a simple assessment letter to address the issue. These communications are typically sent between June and March of the following tax year, providing taxpayers with clear guidance on any necessary adjustments.
It is important to note that these letters are only dispatched to individuals who are employed or receiving a pension, ensuring that relevant parties are informed directly through postal services. This targeted approach helps streamline the process and reduce confusion among taxpayers.
Key Takeaways for Taxpayers
- Tax Code Adjustments: In-year changes to tax codes are temporary and should revert to standard allowances after April 5, 2026.
- Automatic Recalculations: HMRC will start recalculating tax years from June to identify overpayments and issue refunds as needed.
- Refund Tools: Utilize online resources to check for overpayments and initiate refund claims promptly.
- Communication: Watch for tax calculation letters between June and March if you are employed or a pensioner, as these provide crucial updates on your tax status.
By staying informed and proactive, taxpayers can navigate these changes smoothly and ensure they are not missing out on due refunds or facing unnecessary penalties.



