CIOT warns Budget tax changes will increase system complexity and workload
The Chartered Institute of Taxation (CIOT) has warned that Budget tax changes announced on 26 November 2025 will add complexity to the tax system and increase workloads for HMRC and taxpayers. The measures include a three-year extension of income tax threshold freezes, which the Office for Budget Responsibility estimates will bring 780,000 more people into paying income tax and 920,000 more into the higher rate. The Budget introduces a new tax on owners of high value properties, a new charge for driving electric vehicles, and increased income tax rates for dividend, property and savings income above those for other forms of income. The government confirmed it will proceed with limiting agricultural and business reliefs for inheritance tax, expanding that tax's scope and requiring more estate valuations. CIOT President Nichola Ross Martin stated the changes will mean more taxpayers, more tax returns and additional work for tax collectors, taxpayers and their advisers, while expressing concern about HMRC's capacity to handle the increased complexity despite additional resources to reduce the tax gap.