Publication 583
taxmap/pubs/p583-008.htm#TXMP4c023135You can deduct business expenses on your income tax return. These
are the current operating costs of running your business. To be deductible, a
business expense must be both ordinary and necessary. An ordinary expense is one
that is common and accepted in your field of business, trade, or profession. A
necessary expense is one that is helpful and appropriate for your business,
trade, or profession. An expense does not have to be indispensable to be
considered necessary.
The following are brief explanations of some expenses that are
of interest to people starting a business. There are many other expenses that
you may be able to deduct. See your form instructions and Publication 535,
Business Expenses.
taxmap/pubs/p583-008.htm#TXMP7ffcffc6Business start-up costs are the expenses you incur before you
actually begin business operations. Your business start-up costs will depend on
the type of business you are starting. They may include costs for advertising,
travel, surveys, and training. These costs are generally capital expenses.
You usually recover costs for a particular asset (such as machinery
or office equipment) through depreciation (discussed next). You can elect to
deduct up to $5,000 of business start-up costs and $5,000 of organizational
costs paid or incurred after October 22, 2004. The $5,000 deduction is reduced
by the amount your total start-up or organizational costs exceed $50,000. Any
remaining cost must be amortized.
For more information about amortizing start-up and organizational
costs, see chapter 7 in Publication 535.
taxmap/pubs/p583-008.htm#TXMP6454b951If property you acquire to use in your business has a useful
life that extends substantially beyond the year it is placed in service, you
generally cannot deduct the entire cost as a business expense in the year you
acquire it. You must spread the cost over more than one tax year and deduct part
of it each year. This method of deducting the cost of business property is
called depreciation.
Business property you must depreciate includes the following
items.
- Office furniture.
- Buildings.
- Machinery and equipment.
You can choose to deduct a limited amount of the cost of certain
depreciable property in the year you place the property in service. This
deduction is known as the "section 179 deduction." You can take a special
depreciation allowance for certain property you acquire and place in service
before January 1, 2005. For more information about depreciation, the section 179
deduction, and the special depreciation allowance, see Publication 946, How To
Depreciate Property.
 | Depreciation must be taken in the year it is allowable. Allowable
depreciation not taken in a prior year cannot be taken in the current year. If
you do not deduct the correct depreciation, you may be able to make a correction
by filing Form 1040X, Amended U.S. Individual Income Tax Return, or by changing
your accounting method. For more information on how to correct depreciation
deductions, see chapter 1 in Publication 946. |
taxmap/pubs/p583-008.htm#TXMP514cdb28To deduct expenses related to the business use of part of your
home, you must meet specific requirements. Even then, your deduction may be
limited.
To qualify to claim expenses for business use of your home, you
must meet both the following tests.
- Your use of the business part of your home must be:
- Exclusive (however, see
Exceptions to exclusive use,
later),
- Regular,
- For your trade or business, AND
- The business part of your home must be one of the following:
- Your principal place of business (defined later),
- A place where you meet or deal with patients, clients, or
customers in the normal course of your trade or business, or
- A separate structure (not attached to your home) you use
in connection with your trade or business.
taxmap/pubs/p583-008.htm#TXMP13412b67To qualify under the exclusive use test, you must use a specific
area of your home only for your trade or business. The area used for business
can be a room or other separately identifiable space. The space does not need to
be marked off by a permanent partition.
You do not meet the requirements of the exclusive use test if
you use the area in question both for business and for personal purposes.
taxmap/pubs/p583-008.htm#TXMP6bd90472You do not have to meet the exclusive use test if either of the
following applies.
- You use part of your home for the storage of inventory or
product samples.
- You use part of your home as a daycare facility.
For an explanation of these exceptions, see Publication 587,
Business Use of Your Home (Including Use by Daycare Providers).
taxmap/pubs/p583-008.htm#TXMP4ae73e83Your home office will qualify as your principal place of business
for deducting expenses for its use if you meet the following requirements.
- You use it exclusively and regularly for administrative or
management activities of your trade or business.
- You have no other fixed location where you conduct substantial
administrative or management activities of your trade or business.
Alternatively, if you use your home exclusively and regularly
for your business, but your home office does not qualify as your principal place
of business based on the previous rules, you determine your principal place of
business based on the following factors.
- The relative importance of the activities performed at each
location.
- If the relative importance factor does not determine your
principal place of business, the time spent at each location.
If, after considering your business locations, your home cannot be identified as
your principal place of business, you cannot deduct home office expenses.
However, for other ways to qualify to deduct home office expenses, see
Publication 587.
taxmap/pubs/p583-008.htm#TXMP34596e42If you file Schedule C (Form 1040), use Form 8829, Expenses for
Business Use of Your Home, to figure your deduction. If you file Schedule F
(Form 1040) or you are a partner, you can use the worksheet in Publication 587.
taxmap/pubs/p583-008.htm#TXMP46ffbcd4For more information about business use of your home, see Publication
587.
taxmap/pubs/p583-008.htm#TXMP55036ea8If you use your car or truck in your business, you can deduct
the costs of operating and maintaining it. You generally can deduct either your
actual expenses or the standard mileage rate.
taxmap/pubs/p583-008.htm#TXMP1a43c39fIf you deduct actual expenses, you can deduct the cost of the
following items:
| Depreciation | Lease payments | Registration |
| Garage rent | Licenses | Repairs |
| Gas | Oil | Tires |
| Insurance | Parking fees | Tolls |
If you use your vehicle for both business and personal purposes,
you must divide your expenses between business and personal use. You can divide
your expenses based on the miles driven for each purpose.
taxmap/pubs/p583-008.htm#TXMP2e365fa8You are the sole proprietor of a flower shop. You drove your
van 20,000 miles during the year. 16,000 miles were for delivering flowers to
customers and 4,000 miles were for personal use. You can claim only 80% (16,000
÷ 20,000) of the cost of operating your van as a business expense.
taxmap/pubs/p583-008.htm#TXMP46b44849Instead of figuring actual expenses, you may be able to use the
standard mileage rate to figure the deductible costs of operating your car, van,
pickup, or panel truck for business purposes. You can use the standard mileage
rate for a vehicle you own or lease. The standard mileage rate is a specified
amount of money you can deduct for each business mile you drive. It is announced
annually by the IRS. To figure your deduction, multiply your business miles by
the standard mileage rate for the year.
 | Generally, if you use the standard mileage rate, you cannot
deduct your actual expenses. However, you may be able to deduct business-related
parking fees, tolls, interest on your car loan, and certain state and local
taxes. |
taxmap/pubs/p583-008.htm#TXMP45b8c49fIf you want to use the standard mileage rate for a car you own,
you must choose to use it in the first year the car is available for use in your
business. In later years, you can choose to use either the standard mileage rate
or actual expenses.
If you use the standard mileage rate for a car you lease, you
must choose to use it for the entire lease period (including renewals).
taxmap/pubs/p583-008.htm#TXMP3edb5cedFor more information about the rules for claiming car and truck
expenses, see Publication 463, Travel, Entertainment, Gift, and Car Expenses.