In 2011, according to an annual survey by the Kaiser Family Foundation, premiums for employer-sponsored health insurance averaged $5,430 a year for single coverage and $15,070 for family coverage. The employee’s share of the premium averaged $920 for individual coverage and more than four times as much, $4,130, for family coverage.
Under the I.R.S. proposal, such costs would be deemed affordable for a family making $35,000 a year, even though the family would have to spend 12 percent of its income for full coverage under the employer’s plan.
The debate over the meaning of affordable pits the Obama administration against its usual allies. Many people who support the new law said the proposed rules could leave millions of people in the lower middle class uninsured and frustrate the intent of Congress, which was to expand coverage.
“The effect of this wrong interpretation of the law will be that many families remain or potentially become uninsured,” said a letter to the administration from Democrats who pushed the bill through the House in 2009-10. The lawmakers include Representatives Henry A. Waxman of California and Sander M. Levin of Michigan.
Bruce Lesley, the president of First Focus, a child advocacy group, said: “This is a serious glitch. Under the proposal, millions of children and families would be unable to obtain affordable coverage in the workplace, but ineligible for subsidies to buy private insurance in the exchanges” to be established in each state.
Businesses dislike the idea of insurance mandates and penalties, but said the I.R.S. had correctly interpreted the law.