# The Double Declining Depreciation Method: A Beginner’s Guide

July 26, 2022
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July 27, 2022

On the whole, DDB is not a generally easy depreciation method to implement. Given the nature of the DDB depreciation method, it is best reserved for assets that depreciate rapidly in the first several years of ownership, such as cars and heavy equipment. By applying the DDB depreciation method, you can depreciate these assets faster, capturing tax benefits more quickly and reducing your tax liability in the first few years after purchasing them. The time factor for any accounting period that falls between the first and the last period is 1 because the asset will be available for the entire period and, therefore, should be charged the depreciation expense in full.

You placed property in service during the last 3 months of the year, so you must first determine if you have to use the mid-quarter convention. The total bases of all property you placed in service during the year is \$10,000. The \$5,000 basis of the computer, which you placed in service during the last 3 months (the fourth quarter) of your tax year, is more than 40% of the total bases of all property (\$10,000) you placed in service during the year. Therefore, you must use the mid-quarter convention for all three items. If there are no adjustments to the basis of the property other than depreciation, your depreciation deduction for each subsequent year of the recovery period will be as follows. You begin to claim depreciation when your property is placed in service for either use in a trade or business or the production of income.

## How to Calculate the Double Declining Balance

To this amount (\$9,856), you then added the \$3,500 repair cost. The depreciation for the computer for a full year is \$2,000 (\$5,000 × 0.40). You placed the computer in service in the fourth quarter of your tax year, so you multiply the \$2,000 by 12.5% (the mid-quarter percentage for the fourth quarter). The result, \$250, is your deduction for depreciation on the computer for the first year. On July 2, 2020, you purchased and placed in service residential rental property. You used Table A-6 to figure your MACRS depreciation for this property.

By dividing the \$4 million depreciation expense by the purchase cost, the implied depreciation rate is 18.0% per year. For accounting purposes, companies can use any of these methods, provided they align with the underlying usage of the assets. For tax purposes, only prescribed methods by the regional tax authority is allowed. Both DDB and ordinary declining depreciation are accelerated methods.

You can elect, for any class of property, not to deduct any special depreciation allowances for all property in such class placed in service during the tax year. This is the property’s cost or other basis multiplied by the percentage of business/investment use, reduced by the total amount of any credits and deductions allocable to the property. You can elect to claim a 100% special depreciation allowance for the adjusted basis of certain specified plants (defined later) bearing fruits and nuts planted or grafted after September 27, 2017, and before January 1, 2023. The following discussions provide information about the types of qualified property listed above for which you can take the special depreciation allowance.

• The inclusion amount is subject to a special rule if all the following apply.
• Under this method, we debit the amount of depreciation to the Depreciation A/c and credit it to Asset A/c.
• A number of years that establishes the property class and recovery period for most types of property under the General Depreciation System (GDS) and Alternative Depreciation System (ADS).

Similarly, compared to the standard declining balance method, the double-declining method depreciates assets twice as quickly. To figure your MACRS depreciation deduction for the short tax year, you must first determine the depreciation for a full tax year. You do this by multiplying your basis in the property by the applicable depreciation rate. Do this by multiplying the depreciation for a full tax year by a fraction. The numerator (top number) of the fraction is the number of months (including parts of a month) the property is treated as in service during the tax year (applying the applicable convention).

During the fourth week of each month, you delivered all business orders taken during the previous month. The business use of your automobile, as supported by adequate records, is 70% of its total use during that fourth week. You can account for uses that can be considered part of a single use, such as a round trip or uninterrupted business use, by a single record. For example, you can account for the use of a truck to make deliveries at several locations that begin and end at the business premises and can include a stop at the business in between deliveries by a single record of miles driven. You can account for the use of a passenger automobile by a salesperson for a business trip away from home over a period of time by a single record of miles traveled. Minimal personal use (such as a stop for lunch between two business stops) is not an interruption of business use.

## Methods of Depreciation and How to Calculate Depreciation

Recapture of allowance for qualified disaster assistance property. Recapture of allowance for qualified Recovery Assistance property. Qualified property must also be placed in service before January 1, 2027 (or before January 1, 2028, for certain property with a long production period and for certain aircraft), and can be either new property or certain used property.

## What is the double declining balance method of depreciation?

March is the third month of your tax year, so multiply the building’s unadjusted basis, \$100,000, by the percentages for the third month in Table A-7a. Your depreciation deduction for each of the first 3 years is as follows. If you reduce the basis of your property because of a casualty, you cannot continue to use the percentage tables. For the year of the adjustment and the remaining recovery period, you must figure the depreciation yourself using the property’s adjusted basis at the end of the year. The GDS recovery periods for property not listed above can be found in Appendix B, Table of Class Lives and Recovery Periods. Residential rental property and nonresidential real property are defined earlier under Which Property Class Applies Under GDS.

A short tax year is any tax year with less than 12 full months. This section discusses the rules for determining the depreciation deduction for property you place in service or dispose of in a short tax year. It also discusses the rules for determining depreciation when you have a short tax year during the recovery period (other than the year the property is placed in service or disposed of).

Residual value is the estimated salvage value at the end of the useful life of the asset. And the rate of depreciation is defined according to the estimated pattern of an asset’s use over its useful life. For example, if an asset costing \$1,000, with a salvage value of \$100 and a 10-year life depreciates at 30% each year, then the expense is \$270 in the first year, \$189 in the second year, \$132 in the third year, and so on. Of course, the pace at which the depreciation expense is recognized under accelerated depreciation methods declines over time. If you used listed property more than 50% in a qualified business use in the year you placed it in service, you must recapture (include in income) excess depreciation in the first year you use it 50% or less. You also increase the adjusted basis of your property by the same amount.

## Units of Production Depreciation

For more information about improvements, see How Do You Treat Repairs and Improvements, later, and Additions and Improvements under Which Recovery Period Applies? You must generally use MACRS to depreciate real property that you acquired for personal use before 1987 and changed to business or income-producing use after 1986. You bought a home and used it as your personal home several years before you converted it to rental property.

The depreciation deduction, including the section 179 deduction and special depreciation allowance, you can claim for a passenger automobile (defined earlier) each year is limited. On August 1, 2021, Julie Rule, a calendar year taxpayer, leased and placed in service an item of listed property. Julie’s business use of the property was 50% in 2021 and 90% in 2022.

## Automatic Accounting Method Changes for Depreciation and Amortization

In June 2024, Make & Sell sells seven machines to an unrelated person for a total of \$1,100. These machines are treated as having an adjusted basis of zero. The unadjusted depreciable basis and depreciation reserve of the GAA are not affected by the sale of the machine. The depreciation allowance for the GAA in 2023 is \$3,200 [(\$10,000 − \$2,000) × 40% (0.40)]. For information on the GAA treatment of property that generates foreign source income, see sections 1.168(i)-1(c)(1)(ii) and (f) of the regulations.

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Under the straight-line depreciation method, the company would deduct \$2,700 per year for 10 years–that is, \$30,000 minus \$3,000, divided by 10. An estimate of how long an item of property can be expected to be usable in trade or business or to produce income. A capitalized amount is not deductible as a current expense and must be included us tax deadlines for expats, businesses 2021 updated in the basis of property. The total of all money received plus the fair market value of all property or services received from a sale or exchange. The amount realized also includes any liabilities assumed by the buyer and any liabilities to which the property transferred is subject, such as real estate taxes or a mortgage.