New HMRC powers of discovery will be retrospective
The government has confirmed that the Finance Bill will include changes to discovery assessments, allowing HMRC to recoup unpaid high income child benefit charges going back almost ten years. What’s the full story?

The unpopular high-income child benefit charge (HICBC) was introduced in 2013. Despite HMRC administering child benefit payments, it is still finding taxpayers that have not declared the benefit in previous years. Once the Finance Bill is enacted, HMRC will be able to open discovery assessments to collect any unpaid tax charges from as far back as 2013. However, the change will not apply to those who have already appealed against such assessments.
This addition to the Finance Bill is a result of the Upper Tribunal decision in Wilkes v HMRC, which found that HMRC did not have the power to impose the HICBC by means of discovery assessment as there was no income which ought to have been assessed. As a result, Mr Wilkes did not have to pay the tax charges. Individuals with income over £50,000, where either they or their partner receives child benefit, could soon receive a large unexpected tax bill from several years ago.
Related Topics
-
VAT reduced on advance payment if customer cancels?
A subscriber to our newsletter wrote to us with a query. The business supplies a three-stage training course to students that fully pay (non-refundable) in advance for all three stages. If the students drop out before the end, can our subscriber partly reduce the VAT paid to HMRC on their return?
-
HMRC scrutinising directors’ loans
HMRC has begun a new compliance campaign targeting company directors who owed their companies money. What’s the full story, and how should you respond?
-
New two-tier mileage rates for electric vehicles
The amount that employers can reimburse staff for business travel in company cars changes from 1 September 2025. What are the new rates, and why is this update different to previous ones?