Business Deductions

Per Diem Rates from the U.S. General Services Administration

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Rates are set by fiscal year, effective October 1 each year. Find current rates in the continental United States ("CONUS Rates").

Using Outside Services for Your Business


The following activities performed outside your home office will not disqualify you from taking the deduction:
  • You use an outside service to do your billing or bookkeeping.
  • You perform some work out of a hotel or out of your car.
  • You choose to use your own home office for administrative and management activities even if suitable space is provided to you at other locations.
    • Example: A client says you may use his office to do your administrative work. You choose to use your own home office instead. Your home office is still your principal place of business.
  • You may occasionally conduct a minimal amount of administrative and management activities at another fixed location.

Employees With a Sideline Business

If you have a job and operate a sideline business, using your home office for both your employer's business and your own will disqualify you from taking the home office deduction. Remember, your home office must be used regularly and exclusively for your own business.

Deducting Storage Space for Business Products

If you sell merchandise and use separately identifiable space in your home (or garage) for regularly storing inventory, you may allocate a portion of your home's indirect expenses to that space. For example, if the house is 2,000 S.F. and the storage space is 200 S.F., you can allocate 10% (200/2,000) of the total indirect home expenses to the storage space.

Setting Up Your Home Office

A desk, telephone with a separate line, files, computer, printer, and fax, are evidence that you are using the area for business. If you use your den for office space, a partition would help to separate the business area, but it is not required.

Avoid costly penalties!

Use the IRS Online Tax Calendar
to check filing and deposit deadlines.