Buying equipment for your business can feel like a straightforward commercial decision: you need a new laptop, a van, better machinery or improved systems, so you make the purchase. For tax purposes, however, the cost is rarely deducted in the same way as ordinary day-to-day expenses. This is where capital allowances can make a meaningful difference to your tax bill.
For many small businesses, the opportunity is missed not because the rules are unavailable, but because invoices are filed away without considering what has been bought, when it was brought into use, or which relief applies. A little planning before a significant purchase can improve cash flow and avoid leaving legitimate tax relief unclaimed.
What are capital allowances?
Capital allowances are tax reliefs for certain longer-term business assets. They allow a business to deduct all or part of the qualifying cost from its taxable profits. They are the tax system’s alternative to accounting depreciation.
Depreciation records how an asset loses value in your accounts over its useful life. HMRC does not usually allow that depreciation charge as a deduction when calculating taxable profits. Instead, the calculation is adjusted and capital allowances are claimed where the asset qualifies.
The relief may be available to sole traders, partnerships and limited companies. The detail varies according to the type of business, the asset, and how it is used. That is why the description on an invoice matters. A purchase labelled simply as “equipment” may need a closer look before it is included in a tax return.
Which business purchases may qualify?
The broad category is plant and machinery. Despite the name, it covers far more than factory equipment. For a typical Manchester owner-managed business, qualifying items can include computers, phones, office furniture, tools, machinery, commercial vehicles and certain security or communications systems.
Some expenditure within a commercial property can also qualify, particularly integral features such as electrical systems, heating, air conditioning, lifts and certain plumbing installations. Separate relief may be available for the construction or renovation costs of qualifying non-residential structures through the Structures and Buildings Allowance.
The dividing line is whether the business has bought a lasting asset rather than consumed a routine expense. Printer paper, cleaning products and a monthly software subscription are usually revenue costs and are normally deducted in full as business expenses. A new printer, fitted shelving or a substantial piece of machinery may be capital expenditure.
There are exceptions. Land, most buildings and business entertainment do not qualify as plant and machinery. Cars have their own rules, with the available relief often depending on the vehicle’s CO2 emissions and whether it is bought new or second-hand. If an item is used privately as well as for business, the claim may need to be restricted.
The Annual Investment Allowance and full expensing
For many businesses, the Annual Investment Allowance, commonly called AIA, is the most useful form of capital allowance. It can give 100% relief in the year of purchase for qualifying plant and machinery, up to the annual limit. The permanent AIA limit is currently £1 million, which covers the annual investment levels of many small and medium-sized businesses.
In practical terms, if a qualifying sole trader buys £20,000 of equipment and has sufficient taxable profits, the full cost can normally be relieved in that accounting period rather than spread over several years. A limited company may achieve the same immediate deduction through AIA, subject to the relevant conditions.
Companies also have access to full expensing for qualifying new and unused main-rate plant and machinery. This provides a 100% first-year allowance. For qualifying new special-rate expenditure, a 50% first-year allowance may be available. These rules can be valuable for larger investments, but they have exclusions and are not a replacement for checking each purchase individually. Assets acquired for leasing, for example, can be treated differently.
AIA cannot be claimed on every item. Cars are excluded, as are some assets bought from connected parties or for leasing. Where more than one business is under common control, the available AIA may also need to be shared. It is sensible to review proposed spending before committing to it, particularly where the cost is substantial.
Timing can affect the relief
Tax relief is often available when expenditure is incurred, but the timing rules are more detailed than simply looking at the invoice date. The accounting period, payment terms and the date an asset is brought into business use can all matter.
If your year end is approaching and you already intend to replace essential equipment, bringing a qualifying purchase forward may accelerate relief. The reverse can also be true: buying something solely for a tax deduction is rarely good business if it is not needed or puts pressure on working capital. The commercial case should come first, with tax considered alongside it.
When relief is spread over several years
Where 100% relief is not available, expenditure is usually added to a capital allowances pool. Writing-down allowances are then claimed each year on the reducing balance.
The main pool generally attracts an 18% writing-down allowance. The special-rate pool, which can include certain integral features and some higher-emission cars, generally attracts 6%. These percentages and the exact classification are important, as putting an asset in the wrong pool can change both the timing and amount of relief.
There is also a small pools allowance. If the balance of a pool is below the relevant threshold, the remaining amount may often be claimed in full rather than carried forward. This can simplify the calculation for businesses with a small amount of older equipment still awaiting relief.
For some assets, the claim is restricted. A sole trader who uses a laptop 80% for business and 20% personally would normally claim only the business proportion. Company directors should take particular care with assets owned by the company but available for personal use, as separate benefit-in-kind issues may arise.
Vehicles deserve a separate check
Vehicles are one of the most common areas of confusion. A van used in the trade will often qualify as plant and machinery and may be eligible for AIA. A car is treated differently, even where it is used wholly for business.
The rate of capital allowance for a car commonly depends on its CO2 emissions. New and unused zero-emission cars can qualify for a 100% first-year allowance, while other cars are normally relieved through the main or special-rate pool. The purchase method matters too. Buying, hire purchase, leasing and using a personal vehicle for business mileage can each produce different tax outcomes.
It is therefore worth considering the total position before choosing a vehicle, including VAT recovery, running costs, private use, company car tax and cash flow. The cheapest vehicle to buy is not always the most tax-efficient choice, and the most tax-efficient choice is not always the right operational choice.
Good records protect the claim
A successful claim starts with records that make the business purpose clear. Keep the supplier invoice, payment evidence, finance agreement where relevant, asset description and date the item was first used in the business. For mixed-use assets, retain a reasonable record of the business proportion.
For property works, ask contractors for an itemised breakdown rather than accepting one broad figure for a refurbishment. This can help identify qualifying plant and machinery within the project and distinguish it from costs that may qualify for a different allowance or no allowance at all.
Do not assume a purchase has been dealt with correctly because it appears in the accounts. Your bookkeeping should identify the asset, but the tax treatment must also be reviewed when preparing the business or corporation tax return.
Questions business owners often ask
Can I claim capital allowances on second-hand equipment?
Often, yes. Second-hand plant and machinery may qualify for AIA or writing-down allowances, provided the asset and transaction meet the conditions. The rules for full expensing are narrower because it generally applies to new and unused assets.
What happens when I sell an asset?
The sale proceeds usually reduce the relevant capital allowances pool. If the business has claimed more relief than the final balance supports, a balancing charge may increase taxable profits. If the pool is left with an eligible balance and no further assets, a balancing allowance may be available.
Can I claim for purchases from previous years?
Possibly. If qualifying expenditure was overlooked, it may be possible to amend a return within the relevant time limit or include the asset correctly in the appropriate pool. The earlier the issue is identified, the easier it is to resolve.
Capital allowances work best when they are considered as part of a wider plan for profit, cash flow and investment – not as an afterthought once the year has ended. Coombs Chartered Accountants can help you review significant purchases in plain English, so your records support the right claim and your business decisions remain grounded in what you genuinely need next.
