Democrats roll out a plan to send $1,400 stimulus payments to Americans earning up to $75,000 a year.

House Democrats on Monday rolled out a key plank of President Biden’s stimulus plan, proposing legislation to send direct payments of $1,400 to Americans earning up to $75,000 and households with incomes up to $150,000.

The plan, drafted the day before key committees are scheduled to being meeting to consider it, is at odds with proposals from some Republicans and moderate Democrats who want to curtail eligibility for direct payments, targeting it to lower income people. Mr. Biden has said he is open to such modifications.

For now, the measure would allow individuals earning up to $100,000 and households earning up to $200,000 to be eligible for some payment, though the size of the checks would phase out gradually for those with incomes above $75,000, or $150,000 for a family.

The bill, unveiled by Representative Richard E. Neal, Democrat of Massachusetts and the chairman of the Ways and Means Committee, was one of a series that Democrats presented on Monday ahead of a week of legislative work to solidify the details of Mr. Biden’s stimulus proposal.

The decision to keep the income cap at the same level as the last round of stimulus payments comes after days of debate among the House Democratic caucus over the size of the checks, as some moderates pushed to restrict the full amount to those who make $50,000 or less and households earning up to $100,000.

The legislation also includes a series of significant changes to the tax code and an increase in an extension of weekly federal unemployment benefits. It would raise the $300-a-week payment to $400 a week and continue the program — currently slated to begin lapsing in March — through the end of August.

The $1.9 trillion plan would also provide for billions of dollars for schools and colleges, small businesses and a provision that would increase the federal minimum wage to $15 by 2025, a progressive priority.