The lowest-cost marketplace health insurance plan on the Obamacare health insurance marketplace costs an average of $479 per month in 2025, according to the Centers for Medicare & Medicaid Services (CMS)^[0]

Premiums can vary significantly based on company, plan type and metal level (Bronze, Silver, Gold or Platinum), plus your age, tobacco use, family size, location, income and more.

Marketplace health insurance plans, sometimes referred to as Obamacare plans or ACA plans, can be purchased by individuals and families on HealthCare.gov and state health insurance marketplaces.

Depending on a variety of factors, premiums can range from $0 to over $1,000 per month.

For example, here are average 2025 premiums for the lowest-cost Silver plans available to three different combinations of age, family size and income as a percent of the federal poverty line (FPL), before any cost reductions, according to CMS^[0]

• 21-year-old individual earning 150% of the FPL*: $383 per month.

• 40-year-old individual earning 150% of the FPL: $491 per month.

• Family of four earning 325% of the FPL**: $1,207 per month.

* In 2025, 150% of the FPL for an individual in the contiguous U.S. is $23,475 per year^[0]

Premium tax credits can significantly reduce what you pay for premiums, even if your income is well above the federal poverty line. For example, here’s what the three premiums above become after premium tax credits are applied^[0]

• 21-year-old individual earning 150% of the FPL: $0 per month.

• 40-year-old individual earning 150% of the FPL: $0 per month.

• Family of four earning 325% of the FPL: $165 per month.

In general, people with household income between 100% and 400% of the FPL can be eligible for premium tax credits. For an individual in the contiguous U.S., that’s between $15,650 and $62,600 per year in 2025^[0]

The largest subsidies go to people with the lowest income, then they go down on a sliding scale for those who qualify with higher income levels^[0]

• Deductible: Before your plan starts to pay for its portion of most covered services and prescription drugs, you might need to spend a certain amount out of pocket, such as $2,400 for an individual or $4,800 for a family.

• Copay: You might owe a flat amount each time you get a service, such as $50 for visiting a doctor’s office or $10 for filling a prescription.

• Coinsurance: You might owe a percent of the cost of a service, such as 25% of the cost of a prescription drug or 40% of an emergency room bill.

Plans also have an out-of-pocket maximum, which puts a cap on what you have to spend for the year in copays, coinsurance and/or deductibles. After you reach the out-of-pocket maximum, you don’t owe additional out-of-pocket costs for the rest of the year, so a lower maximum is better.

Generally speaking, plans with higher premiums tend to have lower out-of-pocket costs. Plans with lower premiums often have higher out-of-pocket costs.

If you qualify for the premium tax credit and have household income up to 250% of the FPL, you can qualify for cost-sharing reductions^[0]

The size of the cost-sharing reductions depends on your income^[0]

Marketplace health insurance plans can come in four metal levels: Bronze, Silver, Gold and Platinum, each with different levels of coverage. For example, a Silver plan covers about 70% of members’ medical costs, so you’d be responsible for the other 30% out of pocket^[0]

Marketplace health insurance plans by tier

Silver plans are often the most affordable because they’re potentially eligible for more subsidies than any other plan type. Silver plans can end up covering more and costing less than other plans types if you qualify for cost-sharing reductions — and most marketplace enrollees do.