# half-year convention

## Half-Year Convention

In accounting, the assumption that an asset is purchased at its value exactly half-way through the calendar year in which it is purchased. For example, if one buys an asset for \$1,000 on January 1st and it is worth \$1,200 at the end of the second quarter, the half-year convention would assume that it was bought for \$1,200. This can affect taxes owed on the asset and the depreciation allowed each year. Obviously the half-year convention can have both positive and negative impacts, depending on the price movement of the asset.

## half-year convention

The assumption for tax purposes that a newly acquired asset is placed in service halfway through the year regardless of when the asset is actually acquired and placed in service. The half-year convention affects annual depreciation, taxation, and earnings calculations.
References in periodicals archive ?
179 and is able to use the modified accelerated cost recovery system (MACRS) with the half-year convention. There are no other assets purchased in 1991.
In Year 1, taking into account the half-year convention, 5% of the land improvement cost will be recovered; the recovery percentage for the nonresidential depreciable real property will be approximately 1.8162%.
Generally, for most tangible personal property, the applicable convention is the half-year convention. By applying the half-year convention, a taxpayer treats all property placed in service during any tax year as placed in service on the midpoint of that tax year.
Some depreciation systems use a half-year convention; you only take 50% of the depreciation in year 1 and then take the other half of the year's depreciation in year n+1 of the useful life.
Before the increase, a car needed to cost only \$15,300 before the \$3,060 first-year cap was triggered (\$15,300 x 20%), assuming that the half-year convention applied.
Under the existing law, using the half-year convention, the asset's 2002 depreciation is \$20,000.
The half-year convention is used under ACRS, meaning that personalty is depreciated for one-half of the year in which it is initially placed in service.
A half-year convention is used by treating all package designs incurred during the year as having been incurred on the midpoint of the tax year.
The property cost \$1,000 and is a five-year property subject to the half-year convention. The amount of additional first-year depreciation allowed under the new law is \$500.
44 illustrates the alternative approaches for calculating depreciation for both five-year and seven-year MACRS properties, using an asset with an original unadjusted basis of \$10,000 and assuming the half-year convention applies.
If the taxpayer chooses the assets to which it will allocate the [section] 179 amount, the taxpayer also can affect whether the mid-quarter convention or the half-year convention will apply to assets.
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