WASHINGTON  President Obama will propose further tax increases on the affluent to help pay for his promise to make health care more accessible and affordable, calling for stricter limits on the benefits of itemized deductions taken by the wealthiest households, administration officials said Wednesday.

The tax proposal, coming after recent years in which wealth has become more concentrated at the top of the income scale, introduces a politically volatile edge to the Congressional debate over Mr. Obama’s domestic priorities.

The president will also propose, in the 10-year budget he is to release Thursday, to use revenues from the centerpiece of his environmental policy  a plan under which companies must buy permits to exceed pollution emission caps  to pay for an extension of a two-year tax credit that benefits low-wage and middle-income people.

The combined effect of the two revenue-raising proposals, on top of Mr. Obama’s existing plan to roll back the Bush-era income tax reductions on households with income exceeding $250,000 a year, would be a pronounced move to redistribute wealth by reimposing a larger share of the tax burden on corporations and the most affluent taxpayers.