If you are self-employed and you use part of your home for business, you may be able to deduct expenses for the business use of your home. These deductible expenses may include the business portion of real estate taxes, deductible mortgage interest, rent, insurance, utilities, maintenance or repairs and depreciation.
To deduct expenses for business use of the home, part of your home must be used regularly and exclusively as one of the following:
The principal place of business for your trade or business;
The place where you meet and deal with your patients, clients or customers in the normal course of your trade or business; or
In connection with your trade or business, if you use a separate structure that is not attached to your home.
For more detailed information on rules for the business use of your home, see Publication 587