Celia Monreal worries every day about the cartilage loss in her husband’s knees. Not just because it's hard for her to see him in pain – but also because she knows that soon, their health care costs could skyrocket.

Monreal, 47, and her 57-year-old husband rely on the Affordable Care Act marketplace for their health coverage. If Congress doesn’t extend certain ACA tax credits set to expire at the end of the year, their fully subsidized plan will increase in cost, putting it out of reach. Without insurance, they won’t be able to afford his expected knee replacement surgeries – much less the treatment they need for other ongoing issues, like her chronic high blood pressure and his high cholesterol.

“It worries me sometimes, because if you’re not healthy, then you’re not here for your kids,” Monreal said.

“It’s a difficult decision, because, OK, do I spend $500 on a doctor’s visit, or do I buy groceries?”

Those are the types of choices facing the millions of Americans whose state or federal marketplace health insurance plans will be up for renewal in November. The enhanced premium tax credits that have made coverage more affordable for low and middle-income enrollees for the last four years will expire this year if Congress does not extend them. On average, that will more than double what subsidized enrollees currently pay for premiums next year, according to an analysis by the health care research nonprofit KFF.

The tax credits are at the heart of the federal government shutdown that has entered a third week with no end in sight. Democrats have demanded that the subsidies be extended as part of any funding deal they sign, while Republicans say they will only negotiate on the issue once the government is funded.

With Congress deadlocked and the open enrollment period for ACA plans approaching on Nov. 1 in most states, Americans like Monreal are left to navigate the unknown.

No extension will mean higher premiums for millions

More than 24 million people have ACA health insurance, a group that includes farmers, ranchers, small business owners, and other self-employed people who don’t have other health insurance options through their work.

The enhanced premium tax credits set to expire at the end of the year have made costs far more manageable for many of them, allowing some lower-income enrollees to get health care with no premiums and higher earners to pay no more than 8.5% of their income.

If the tax credits expire, annual out-of-pocket premiums are estimated to increase by 114% — an average of $1,016 — next year, according to the KFF analysis.

While some premium tax credits will remain, the level of support will decrease for most enrollees. Anyone earning over 400% of the poverty level – or around $63,000 per year for a single person – won’t be eligible for the remaining tax credits at all.

As a result, especially hard-hit groups will include a small number of higher earners who will have to pay a lot more without the extra subsidies, and a large number of lower earners who will have to pay a small amount more, said Cynthia Cox, a vice president and director of the ACA program at KFF.

With higher premiums, some will drop out of health insurance altogether, Cox said. When many younger, healthier people inevitably forgo coverage, insurance companies will increase costs for the covered population to account for them being older and sicker.

The change may also strain hospitals, since more uninsured people will need emergency care that they can’t afford. That could lead to hospital closures or cost increases.

“If you have less subsidies for people getting health insurance, you’re going to have less health coverage and less health care,” said Jason Levitis, a senior fellow in the health policy division at the Urban Institute. “People are going to be sicker and die more.”

A caregiver braces for the worst. A filmmaker considers a new job

Erin Jackson-Hill has allergies, asthma and searing hip pain that she’s managing with prescribed medications until she can get a hip replacement. But even with all those conditions, the 56-year-old in Anchorage, Alaska, doesn’t think she can pay for health insurance next year if the ACA subsidies aren’t extended.

The executive director of two nonprofits, who also cares for her 90-year-old father full time, already pays nearly $500 a month for her premiums. If the subsidies disappear, her plan is to forgo health insurance and pay for her asthma and allergy medications out of pocket.

Jackson-Hill said she worries about what will happen if her hip worsens, and she can’t make it up the stairs in her father’s two-story home without treatment.

“I will have to go to the emergency room, or I’ll have to go bankrupt in order to pay for it,” she said.

Another ACA enrollee, Salt Lake City freelance filmmaker and adjunct professor Stan Clawson, said he’ll find a way to pay for health insurance next year — even if it means he must buy cheaper groceries or get a new job that provides it.

Clawson, 49, has lived with paralysis below his abdomen ever since sustaining a fall while rock climbing when he was 20. He’s active and generally healthy, but his spinal cord injury has resulted in tendonitis in his shoulders and frequent urinary tract infections.

He also has to purchase catheters to use every time he urinates – a cost he said would add up to around $1,400 a month without insurance.

“I don’t think a lot of people realize how expensive it is to have a disability,” Clawson said, adding that trying to live without health insurance would be “financially devastating."

Chrissy Meehan, a hair stylist in Upper Chichester, Pennsylvania, is considering further delaying a needed neck surgery if ACA subsidies expire.

The 51-year-old voted for President Donald Trump last year, something she said she’s embarrassed about now that the Republican-led government hasn’t renewed the subsidies that help her afford her coverage through the state marketplace.

“I work hard and I’m trying to survive and do it the right way and pay my way,” Meehan said. “I don’t want free. I just want affordable for my income.”

Even if Congress does extend, the delay could have consequences

Health policy analysts note that even if the subsidies are extended, insurance rate hikes for 2026 are already higher because insurers had to factor in their potential expiration when they set premium prices earlier this year.

There are also concerns the delay will cause chaos, confusion and stress for Americans, some of whom have already started receiving notices that their premiums will skyrocket next year.

“Once those people say, ’oh, wait, forget it, I’m out,’ it’s going to be hard to get a lot of them back,” said the Urban Institute's Levitis.

Monreal's husband will likely need both knees replaced at some point, which will force him to take time off his job filling concrete. On their already-tight $45,000 joint income, budgeting for themselves and their five children will become that much harder.

The concern over their budget and the uncertainty over their health care coverage send her thoughts into yet another worrisome spiral with just two weeks until open enrollment begins.

“They haven’t told us nothing,” she said, of her insurance provider. “And you know what? At the end, you end up with no health care.”