Annual Investment Allowance (AIA) for sole traders: claiming for equipment and tools
The Annual Investment Allowance can let sole traders deduct the full cost of qualifying plant and machinery from taxable profits, rather than spreading relief over several years.
What AIA does
AIA is a capital allowance. It applies to many business assets that last beyond the tax year, such as tools, machinery, computers, equipment, and some fixtures. Instead of treating the purchase like a normal running cost, you claim capital allowances to get tax relief.
The £1 million AIA limit
The Annual Investment Allowance limit is currently £1 million. Most small sole traders will never get close to that limit, but it matters because it means many equipment purchases can receive full relief in the year of purchase if they qualify.
What usually qualifies
- Tools used in a trade.
- Plant and machinery.
- Computers and business equipment.
- Workshop equipment and some fixtures.
- Commercial equipment bought for ongoing business use.
Cars are different
Cars are generally excluded from AIA. They have separate capital allowance rules, often linked to emissions. Vans, tools, and machinery may be treated differently from cars, so do not assume every vehicle follows the same rule.
Worked example
A self-employed tradesperson buys £6,000 of qualifying tools and equipment for the business. If the equipment qualifies for AIA and is used wholly for business, the full £6,000 may be deducted when calculating taxable profit for the year. If there is private use, only the business share should be claimed.
Business use and records
Keep invoices, payment evidence, and notes explaining how the equipment is used in the trade. If an asset has private use, record a reasonable business percentage. The same “business purpose” discipline that applies to expenses also applies here.
AIA vs ordinary expenses
Small consumables and day-to-day costs may be ordinary expenses. Longer-lasting equipment is more likely to be capital. The tax outcome can still be full relief under AIA, but the return category is different. If you are unsure, ask your accountant before filing.
Cash flow warning
Tax relief does not mean HMRC pays for the equipment. A £6,000 purchase may reduce taxable profit, but the cash still leaves your business. Estimate the tax effect with the self-employed tax calculator and keep enough aside for January.
Official source
GOV.UK explains the allowance here: Annual Investment Allowance.