Against a backdrop of continued pressure on the public finances, the Government has maintained the main rate of corporation tax at 25% and has not announced significant changes to the overall corporation tax rate structure.
The principal business tax announcements instead focus on targeted reforms to particular areas of the corporate tax system.
The Government has confirmed that it will proceed with a package of reforms to modernise the taxation of company distributions and repayments of capital. The reforms are intended to provide greater consistency between economically similar transactions, irrespective of their legal form, company residence or transaction structure.
Following stakeholder feedback, the Government has indicated that the detailed rules will include safeguards aimed at protecting genuine commercial transactions and UK competitiveness. The measures will be subject to a technical consultation, including draft legislation in 2027, with the new rules intended to take effect prospectively from April 2028.
The bank surcharge rate will be temporarily increased from 3% to 6% for 15 months from 1 January 2027 as part of measures intended to fund support for households. For affected entities, this will increase the combined corporation tax and bank surcharge on relevant profits to 31% during the temporary period.
The Government has confirmed that it will not proceed with the previously proposed reporting requirements for company payments to participators. This follows consultation feedback raising concerns over the additional administrative burden and proportionality of the proposals.
As previously announced in May, the Government will make the foreign permanent establishment (“PE”) exemption mandatory for UK resident companies, rather than elective. For accounting periods beginning on or after 1 January 2027, profits attributable to foreign PEs will generally be exempt from UK corporation tax, while foreign PE losses will no longer be available to offset UK taxable profits.
The reforms will also replace the existing loss clawback provisions with new transitional rules and introduce targeted anti-avoidance measures.
The change will therefore be particularly relevant for UK groups operating overseas through branches, especially where those operations are loss-making or expected to incur losses during their start-up or investment phase.
The Government has confirmed that it will implement the OECD’s Side-by-Side package alongside a number of technical amendments to the UK’s Multinational Top-up Tax and Domestic Top-up Tax regimes.
The package is intended to simplify the application of the Pillar Two rules and provide greater certainty for multinational groups. The Side-by-Side package applies for accounting periods beginning on or after 1 January 2026.
Groups within the scope of Pillar Two will need to consider the changes as part of their ongoing compliance and modelling, including the extent to which the revised rules affect existing safe harbour and top-up tax positions.
The Government will expand the statutory definition of a finance lease for certain lease and leaseback arrangements, ensuring that the existing tax rules apply to relevant lessees whether they hold a finance lease or a relevant right-of-use lease. The changes will take effect from 28 October 2026.
Following the launch of the Advance Tax Certainty Service in July 2026, the Government will reduce the qualifying investment threshold from £1 billion to £300 million from 4 November 2026, significantly widening the range of major investment projects able to access advance certainty over their UK tax treatment.
The Government has launched a consultation on simplifying the corporate tax system to support business investment, seeking views on reducing complexity across areas including financing, international tax, investment and innovation with the aim of improving certainty and UK competitiveness
Overall, this was not a Budget centred on broad increases in corporation tax. Instead, it continues the Government’s emphasis on stability in the headline regime while making targeted changes to the tax base and specific areas of the corporate tax system.
For many businesses, the 25% corporation tax rate may therefore remain unchanged, but the detailed measures beneath that headline could have a more significant impact depending on their structure, activities and investment plans.
The proposed overhaul of distributions and capital repayments could have important implications for corporate reorganisations, shareholder exits and other transactions involving the extraction or return of value.
While the reforms are not intended to take effect until April 2028 and remain subject to consultation, businesses considering transactions in these areas will want to monitor the development of the legislation closely.
The mandatory foreign PE exemption represents another significant change in approach. While foreign branch profits will generally fall outside the UK tax net, UK companies will no longer have the flexibility to obtain UK relief for foreign branch losses.
This may be particularly relevant for groups establishing or expanding overseas operations where losses are anticipated in the early years.
The measures unveiled in the UK Autumn Budget will have far-reaching implications for businesses across Northern Ireland. If you have any enquiries, comments, or wish to explore further, we are here to assist.
Contact Sara Hamill or Roger Campbell of our Tax team today.
