WASHINGTON — A bill to increase the federal minimum wage to $15 an hour by 2025 would lift 1.3 million people out of poverty but also put an estimated 1.3 million Americans out of work, the Congressional Budget Office projected on Monday.

The report, which projected higher pay for at least 17 million workers, is likely to fuel both supporters and critics of a House bill that could be voted on as early as next week.

While Democrats expect to hold a vote on the bill, the House leadership and chief proponents of the measure have had to iron out concerns from within the party’s caucus, particularly from members representing more rural districts. The Progressive Caucus has lobbied heavily for the bill, which would phase in the increase to $15, but more moderate members have expressed reservations about the scope of the legislation and its impact on small businesses.

Some holdouts appeared to have been swayed in recent weeks by a proposed amendment, championed by Representatives Tom O’Halleran of Arizona and Stephanie Murphy of Florida, both Democrats, that would require an independent study of the raise after two years — before the minimum wage had increased to $11.15, from the current $7.25.