Get Ready for Obamacare Taxes

High-income earners and those affected by a plague of small taxes will start paying net year

WASHINGTON—Who gets thumped by higher taxes in President Barack Obama's health care law? The wealthiest 2 percent of Americans will take the biggest hit, starting next year. And the pain will be shared by some who aren't so well off—people swept up in a hodgepodge of smaller tax changes that will help finance health coverage for millions in need.

For the vast majority of people, however, the health care law won't mean sending more money to the IRS.