WASHINGTON DC -- House Republicans are set to vote this week on their version of a health care bill as the expiration of enhanced Affordable Care Act subsidies looms ever closer.

The legislation does not address that key premium assistance, though lawmakers may consider an amendment to the bill that would extend the enhanced subsidies.

The details of such an amendment are still being discussed. But over the weekend, party leaders and GOP centrists failed to agree on the exact contours of the centrists’ amendment, according to a person involved in the discussions. Two centrists plan on Tuesday to force a key House committee to agree to hold a vote on their amendment.

Obamacare enrollees who want their coverage to begin on January 1 don’t have the luxury of time. The deadline to sign up for full-year 2026 coverage is Monday, and the premiums shoppers will see will not include the enhanced assistance. (Open enrollment generally runs until January 15.)

Whatever happens in the House, the beefed-up subsidies are likely to lapse at year’s end since the Senate is not expected to vote on any health care proposals this week. A Democratic effort to extend the subsidies was voted down in the Senate on Thursday, as was a Republican bill that would have funneled federal funds into health savings accounts, known as HSAs, to help certain Obamacare enrollees afford health care.

The House package would not beef up HSAs, but it does contain other measures that have long been popular with Republicans.

“This is kind of a greatest hits of Republican health care ideas of the last decade,” said Larry Levitt, executive vice president for health policy at KFF, a nonpartisan research group.

The House GOP bill would not do much to broadly lower health care costs, especially for those who buy coverage on the Affordable Care Act exchanges, experts say.

If the enhanced subsidies lapse, enrollees will see their annual premium payments increase by 114% — or about $1,000 — on average in 2026, according to KFF. Roughly 2 million more people are also expected to be uninsured next year if the subsidies end, according to the Congressional Budget Office. The more generous assistance was enacted in 2021 as part of a Biden administration Covid-19 relief package.

The House bill would allow small businesses — as well as self-employed people — to band together across industries to buy coverage through association health plans in an effort to lower premiums.