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IRS.gov Website
Publication 587
taxmap/pubs/p587-006.htm#en_us_publink1000226391

Business Furniture and Equipment(p14)

rule
This section discusses the depreciation and section 179 deductions you may be entitled to take for furniture and equipment you use in your home for business or work as an employee. These deductions are available whether or not you qualify to deduct expenses for the business use of your home.
This section explains the different rules for each of the following.
taxmap/pubs/p587-006.htm#en_us_publink1000226392

Listed Property(p15)

rule
If you use certain types of property, called listed property, in your home, special rules apply. Listed property includes computers and related equipment and any property of a type generally used for entertainment, recreation, and amusement (including photographic, phonographic, and video recording equipment).
taxmap/pubs/p587-006.htm#en_us_publink1000226393
Exception for certain use of computers.(p15)
Computers and related equipment used exclusively in a qualifying office in your home are not listed property. If you qualify to deduct expenses for the business use of your home (see Qualifying for a Deduction, earlier) and you use your computer exclusively in your qualifying office in the home, do not use the listed property rules discussed below. Instead, follow the rules discussed under Property Bought for Business Use, later.
taxmap/pubs/p587-006.htm#en_us_publink1000226394

More-than-50%-use test.(p15)

rule
If you bought listed property and placed it in service during the year, you must use it more than 50% for business (including work as an employee) to claim a section 179 deduction or an accelerated depreciation deduction.
If your business use of listed property is 50% or less, you cannot take a section 179 deduction and you must depreciate the property using the Alternative Depreciation System (ADS) (straight line method). For more information on ADS, see Publication 946.
Listed property meets the more-than-50%-use test for any year if its qualified business use is more than 50% of its total use. You must allocate the use of any item of listed property used for more than one purpose during the year among its various uses. You cannot use the percentage of investment use as part of the percentage of qualified business use to meet the more-than-50%-use test. However, you do use the combined total of business and investment use to figure your depreciation deduction for the property.
taxmap/pubs/p587-006.htm#en_us_publink1000226395

Example 1.(p15)

Sarah does not qualify to claim a deduction for the business use of her home, but she uses her home computer 40% of the time for a business she operates out of her home. She also uses the computer 50% of the time to manage her investments. Sarah's home computer is listed property because it is not used in a qualified office in her home. She does not use the computer more than 50% for business, so she cannot elect a section 179 deduction. She can use her combined business/investment use (90%) to figure her depreciation deduction using ADS.
taxmap/pubs/p587-006.htm#en_us_publink1000226396

Example 2.(p15)

If Sarah uses her computer 60% of the time for her business and 30% for managing her investments, her computer meets the more-than-50%-use test. She can elect a section 179 deduction. She can use her combined business/investment use (90%) to figure her depreciation deduction using the General Depreciation System (GDS).
taxmap/pubs/p587-006.htm#en_us_publink1000226397
Employee.(p15)
If you use your own listed property (or listed property you rent) in your work as an employee, the property is business-use property only if you meet the following requirements.
The use of property as a condition of your employment means that it is necessary for you to properly perform your work. Whether the use of the property is required for this purpose depends on all the facts and circumstances. Your employer does not have to tell you specifically to use the property. Nor is a statement by your employer to that effect sufficient.
taxmap/pubs/p587-006.htm#en_us_publink1000226398

Years following the year placed in service.(p15)

rule
If, in a year after you place an item of listed property in service, you fail to meet the more-than-50%-use test for that item of property, you may be required to do the following.
  1. Figure depreciation, beginning with the year you no longer use the property more than 50% for business, using the straight line method (ADS).
  2. Figure any excess depreciation (include any section 179 deduction on the property in figuring excess depreciation) and add it to:
    1. Your gross income, and
    2. The adjusted basis of your property.
For more information, see Publication 946.
taxmap/pubs/p587-006.htm#en_us_publink1000226399

Reporting and recordkeeping requirements.(p15)

rule
If you use listed property in your business, you must file Form 4562 to claim a depreciation or section 179 deduction. Begin with Part V, Section A, of that form.
Where Refund
You cannot take any depreciation or section 179 deduction for the use of listed property unless you can prove your business/investment use with adequate records or sufficient evidence to support your own statements.
To meet the adequate records requirement, you must maintain an account book, diary, log, statement of expense, trip sheet, or similar record or other documentary evidence that is sufficient to establish business/investment use. For more information on what records to keep, see Publication 946.
taxmap/pubs/p587-006.htm#en_us_publink1000226401

Property Bought for Business Use(p16)

rule
If you bought certain property during 2012 to use in your business, you can do any one of the following (subject to the limits discussed later).
taxmap/pubs/p587-006.htm#en_us_publink1000226402

Section 179 Deduction(p16)

rule
You can claim the section 179 deduction for the cost of depreciable tangible personal property bought for use in your trade or business. You can choose how much (subject to the limit) of the cost you want to deduct under section 179 and how much you want to depreciate. You can spread the section 179 deduction over several items of property in any way you choose as long as the total does not exceed the maximum allowable. You cannot take a section 179 deduction for the basis of the business part of your home.
You elect the section 179 deduction by completing Part I of Form 4562.
taxmap/pubs/p587-006.htm#en_us_publink1000226403

More information.(p16)

rule
For more information on the section 179 deduction, qualifying property, the dollar limit, and the business income limit, see Publication 946 and the Form 4562 instructions.
taxmap/pubs/p587-006.htm#en_us_publink1000226404

Depreciation(p16)

rule
Use Parts II and III of Form 4562 to claim your deduction for depreciation on property placed in service during the year. Do not include any costs deducted in Part I (section 179 deduction).
Most business property normally used in a home office is either 5-year or 7-year property under MACRS.
Under MACRS, you generally use the half-year convention, which allows you to deduct a half-year of depreciation in the first year you use the property in your business. If you place more than 40% of your depreciable property in service during the last 3 months of your tax year, you must use the mid-quarter convention instead of the half-year convention.
After you have determined the cost of the depreciable property (minus any section 179 deduction and special depreciation allowance taken on the property) and whether it is 5-year or 7-year property, use the table, shown next, to figure your depreciation if the half-year convention applies.

Table 4. MACRS Percentage Table for 5- and 7-Year Property Using Half-Year Convention

Recovery Year5-Year Property7-Year Property
1 20.00%14.29%
2 32.00%24.49%
3 19.20%17.49%
4 11.52%12.49%
5 11.52% 8.93%
6  5.76% 8.92%
7   8.93%
8   4.46%
See Publication 946 for a discussion of the mid-quarter convention and for complete MACRS percentage tables.
taxmap/pubs/p587-006.htm#en_us_publink1000226407

Example.(p16)

In June 2012, Donald Kent bought a desk and three chairs for use in his office. His total bill for the furniture was $1,975. His taxable business income for the year was $3,000 without any deduction for the office furniture. Donald can elect to do one of the following.
The furniture is 7-year property under MACRS. Donald does not take a section 179 deduction. He multiplies $1,975 by 14.29% (.1429) to get his MACRS depreciation deduction of $282.23.
taxmap/pubs/p587-006.htm#en_us_publink1000226408

Personal Property Converted to Business Use(p16)

rule
If you use property in your home office that was used previously for personal purposes, you cannot take a section 179 deduction for the property. You also cannot take a special depreciation allowance for the property. You can depreciate it, however. The method of depreciation you use depends on when you first used the property for personal purposes.
If you began using the property for personal purposes after 1986 and change it to business use in 2012, depreciate the property under MACRS.
The basis for depreciation of property changed from personal to business use is the lesser of the following.
If you began using the property for personal purposes after 1980 and before 1987 and change it to business use in 2012, you generally depreciate the property under the accelerated cost recovery system (ACRS). However, if the depreciation under ACRS is greater in the first year than the depreciation under MACRS, you must depreciate it under MACRS. For information on ACRS, see Publication 534, Depreciating Property Placed in Service Before 1987.
If you began using the property for personal purposes before 1981 and change it to business use in 2012, depreciate the property by the straight line or declining balance method based on salvage value and useful life.