Starting in January, tax credits will be available to individuals and families earning up to four times the federal poverty level, or about $46,000 and $94,200 annually, to offset the cost of health insurance premiums.
People without insurance will be able to purchase it in new state and federally run marketplaces, where those tax credits will flow directly to plans they choose.
According to Families USA, 88 percent of those eligible for tax credits will be working families.
The Obama administration is facing tough questions about its implementation of the law and the public's understanding of the new rules.
Senate Finance Committee Chairman Max Baucus (D-Mont.) told the top Obama health official Wednesday that he fears a "train wreck" will occur as the law's major provisions take effect next year.
"For the marketplaces to work, people need to know about them," Baucus told Health and Human Services Secretary Kathleen Sebelius in a hearing. "People need to know their options and how to enroll."
Pollack said Thursday that his group's study should help ordinary people understand how they might benefit from the Affordable Care Act
"There is concern that a lot of people who are potentially eligible for these tax credit premiums subsidies may not know about it and if they don't know about it, they may not decide to get enrolled," Pollack said. "We want to make sure that in states across the country, people are aware that help is potentially on the way."
The report was written by members of the Families USA staff using data from The Lewin Group.