From 1 January 2026
40% first-year allowance
You can claim 40% of what you spend on new main-rate plant and machinery in the year you buy it. Sole traders, partnerships and companies can all claim it, including on assets you lease out. Cars, second-hand assets and assets leased overseas don’t qualify.
The £1 million Annual Investment Allowance still covers most small businesses in full. The 40% matters when you’ve used that up or it doesn’t apply.