The annual investment allowance (AIA) allows businesses to obtain an immediate deduction against profits for capital expenditure up to the limit of the allowance.
Where a business prepares accounts using the more traditional accruals basis, they are not allowed to deduct capital expenditure in computing profits; instead relief for capital expenditure is given under the capital allowances system, whether in the form of the AIA, a first-year allowance or a writing down allowance.
Where a business prepares accounts using the cash basis, different rules apply to capital expenditure. Under the cash basis, capital expenditure can be deducted in computing profits unless the expenditure is of a type where such as deduction is prohibited, for example, as is the case for land and cars. Capital allowances are not in point (except for cars), and the annual investment allowance is not available.
What expenditure qualified for the AIA?
The AIA is available on most items of plant and machinery, the main exception being cars. The AIA is likewise not available on items owned for another reason before they were used in the business or on items given to the proprietor or the business.
The AIA can only be claimed for the period in which the item of plant or machinery was purchased. The date or purchase is when the contract is signed, if the payment is due within four months or, where payment is due more than four months later, the date that the payment is due.
The claim is made in the company or self-assessment tax return, as appropriate.
How much is the AIA?
The allowance is set at £200,000 for 12-months periods. The allowance is reduced proportionately for accounting periods of less than 12 months (so, if the accounting period is nine months, the AIA limit for that period is £150,000 (9/12 x £200,000)).
If qualifying expenditure in the period is less than the AIA for that period, the AIA can be claimed for the full amount of the expenditure. However, if qualifying capital expenditure in the period is more than the AIA for that period, the AIA can only be claimed up to the amount of the allowance, with relief for the balance of the expenditure being given by means of writing down allowances.
Harry buys three vans costing £20,000 each in the year to 30 September 2018. The total expenditure of £60,000 is less than the AIA available for the period, so he is able to claim the AIA for the full amount of the expenditure.
George buys new machinery costing £300,000 in the year to 31 October 2018. The expenditure exceeds the available AIA for the period of £200,000. He is able to claim the AIA on the first £200,000 of the expenditure. Relief for the remaining £100,000 is given by way of writing down allowances.
How is relief given?
Relief is given as a deduction in computing profits for the period. Thus, claiming the AIA provides immediate 100% relief for capital expenditure.
What happens when the item is sold?
If the item is sold, the proceeds are added to the relevant pool. This may trigger a balancing charge.
Do we have to claim the AIA?
No – a claim is not mandatory. It will not always be beneficial to claim the AIA, for example if profits are insufficient or the item is likely to be sold after a short period triggering a balancing charge; it may be preferable to claim writing down allowances instead. The claim can be tailored to the business’ circumstances.
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