It is more complicated than the one paragraph I am snipping implies. I suggest reading the entire page.
http://www.politifact.com/truth-o-meter/statements/2010/jul/27/stephen-hayes/so-called-wealthy-are-actually-small-business-owne/^snip^
There's one final point we want to clarify here for our readers, because we've been asked about this before: If you are a small business owner yourself, you would have to be a whiz running a very profitable small business to get hit with a tax increase under the plan Obama supports. You would have to report total income of more than $200,000 (or $250,000 for couples) after all your business expenses were deducted. You may remember this being a key point during the Joe the Plumber debate during the 2008 campaign when Samuel Joseph Wurzelbacher said to then candidate Obama, "I'm getting ready to buy a company that makes 250 to 280 thousand dollars a year. Your new tax plan's going to tax me more, isn't it?" Back then, the Tax Policy Center analyzed all taxpayers, of any income level, who report these types of business income.
They found only about 2 percent of them would see tax increases if the government increased the rates on the top earners. So the vast majority of possible small business owners would not see a tax increase if the Bush tax cuts expire for those in the top incomes.(emphasis is mine)