According to the Summer 2009 Statistics of Income Bulletin, there were about 23.1 million individual income tax returns that reported nonfarm sole proprietorship activity for 2007. This represents a 4.7% increase over the prior year.
Activities with the largest profits were professional, scientific, and technology services. However, while profits for all Schedule C filers totaled $280.6 billion in 2007, this represented a slight decline (1.8%) compared with 2006.
Items directly reducing income. Personal deductions such as for mortgage interest, state and local taxes, and charitable contributions are allowed only if deductions are itemized on Schedule A, but deductions such as for alimony, capital losses, moving expenses to a new job location, business losses, student loan interest, and IRA and Keogh deductions are deducted from gross income even if itemized deductions are not claimed.