Health Insurance for 18-Year-Olds

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Updated: August 20, 2026

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Key Takeaways
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Health insurance for 18-year-olds averages $291 to $588 monthly for a Marketplace plan. Most 18-year-olds who buy through HealthCare.gov qualify for premium tax credits, which are income-based federal discounts that lower the monthly cost below these amounts.

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At the Silver tier, a Marketplace HMO averages $480 a month for 18-year-olds and a PPO averages $566. HMOs cost less because they require you to see a primary care doctor before visiting specialists, a restriction insurers price at a lower monthly premium.

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An 18-year-old can lower costs if they enroll in Medicaid, get employer coverage, stay on a parent's plan, or choose Catastrophic coverage.

Things to Look for Before Buying Health Insurance as an 18-Year-Old

The most common mistake at 18 is picking the lowest monthly premium without checking the deductible, which is the amount you pay before your plan covers most care. A Catastrophic plan costs $291 a month but carries a deductible of $10,600 before coverage applies to most services.   

Before comparing prices, think about how you actually use health care. If you take regular medications or expect to see a specialist this year, a lower monthly premium almost always costs more over 12 months once deductibles and copays are included.

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    Monthly Premium vs. Deductible

    A monthly premium is what you pay each month regardless of care use. A deductible is what you pay before coverage starts. Compare both numbers across plans, not just the monthly rate.

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    Network Coverage

    HMO and EPO plans cover only doctors in one network. If you attend college in another state or move cities, confirm the plan covers providers in both locations before enrolling.

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    Prescription Drug Coverage

    All ACA Marketplace plans cover prescription drugs and cost per drug varies by plan under the Affordable Care Act, the federal law that governs these plans. Check the plan's drug list, called a formulary, to confirm your prescriptions are covered before you enroll.

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    Mental Health Services

    ACA-compliant plans must cover mental health care at the same level as physical care. Check which therapists and psychiatrists are in-network in your location before choosing a plan.

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    Out-of-Pocket Maximum

    This is the most you'll pay in a year before your plan covers 100% of costs. A plan with a lower monthly premium often carries a higher out-of-pocket maximum, which matters most if you need emergency care.

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    Preventive Care

    All ACA-compliant plans cover annual checkups, vaccines and recommended screenings at no cost when you see an in-network provider. You pay nothing out of pocket and don't need to meet your deductible first.

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    Open Enrollment Timing

    You can enroll in a Marketplace plan during Open Enrollment, which is from November 1 through January 15 in most states. Losing a parent's plan gives you a 60-day Special Enrollment Period outside this window.

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WHEN DO I GET KICKED OFF MY PARENT'S PLAN?

Under the Affordable Care Act (ACA), most 18-year-olds can stay on a parent's plan until 26. It covers you whether you live at home or not. Your marital status, job and school enrollment don't affect eligibility. It covers both employer plans and plans purchased through HealthCare.gov.

Nine states extend coverage beyond 26 for unmarried dependents: Florida, Nebraska, New York, South Dakota, Illinois, New Jersey, Ohio, Pennsylvania and Wisconsin. Check that the plan's in-network providers cover your area. A plan based in your parents' home state may not cover routine care near your school or city.

How Can You Get Medical Insurance as an 18-Year-Old or a Student?

In my review of coverage costs for 18-year-olds, employer plans and parent's plans cost less than buying independently in almost every scenario. An employer that pays part of your monthly premium, or a parent's plan you're already enrolled in, cuts your cost more than any other variable.   

You can only enroll during Open Enrollment, from November 1 through January 15 in most states. Losing a parent's plan or employer coverage counts as a qualifying life event and gives you a Special Enrollment Period: 60 days to buy outside the standard window.

Health Insurance Options for Students and 18-year-olds
Parent’s Plan

Most young adults can stay on a parent’s plan until age 26 if the parent has job-based or Marketplace coverage. If you stay on a parent's plan at 18, your parent may receive an Explanation of Benefits (EOB) for each claim you file. An EOB lists the care you received, such as mental health visits and prescriptions. You can request confidential communications from the insurer to have your documents sent to your own address.

Employer Plan

If you’re working and your job offers health insurance, this is the most affordable option for someone your age. Employer plans cover a wide range of care and often cost less each month than buying a plan on your own.

Medicaid

Medicaid eligibility depends on whether the state has expanded Medicaid under the ACA. It covers essential services like doctor visits, prescriptions and preventive care, at little or no cost. You can check eligibility and apply through your state Medicaid site or HealthCare.gov.

Marketplace Plans (HealthCare.gov)

Marketplace plans let you choose from several coverage levels with built-in benefits like preventive care, prescription drugs and mental health services. Based on your income, you also get savings that lower your monthly cost.

Buying Directly from an Insurance Company

Some insurers sell plans directly, including short-term coverage. These plans are not ACA-compliant. They can deny claims for pre-existing conditions, which are health issues you had before the policy started, and they don't cover mental health care, prescriptions or maternity care by default. They work as a short-term bridge only.

University Health Plans
Colleges often offer student plans with predictable costs and on-campus care. If you're heading to school, this can be an easy way to get care on campus and avoid paying for more insurance than you need.

How Much Is Health Insurance for an 18-Year-Old?

A monthly premium is what you pay each month for health coverage regardless of whether you use care. For 18-year-olds, Marketplace premiums range from $291 a month for a Catastrophic plan to $588 for Platinum, based on MoneyGeek's analysis of 2026 CMS data.   

Lower tiers carry a higher deductible, the amount you pay before coverage starts. Moving up a tier raises the monthly premium but cuts what you pay each time you use care. Higher tiers cost more monthly but lower what you pay when you actually need care. Most 18-year-olds who buy their first plan choose Bronze or Silver depending on how often they expect to use care.

Catastrophic
$291
$3,493
Bronze
$367
$4,406
Expanded Bronze
$353

$4,237

Silver

$480

$5,723
Gold
$492
$5,901
Platinum
$588
$7,061

*These averages don't include income-based savings. Many 18-year-olds qualify for premium tax credits, which are federal subsidies that reduce your monthly Marketplace plan cost based on household income. Your actual premium also depends on your state, plan type and coverage tier.  

Silver is the only tier that qualifies for cost-sharing reductions, which are income-based discounts that lower your deductible and copays on top of any premium savings. For 18-year-olds who qualify, a Silver plan can cost less over the year than a Bronze plan despite the higher monthly premium.

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UNDERSTANDING PLAN TIERS

Catastrophic plans are available only to people under 30. They carry the lowest monthly premium, averaging $291. It requires you to pay a high deductible of $10,600 before coverage starts. They cover three primary care visits per year and all preventive care at no cost.

A Catastrophic plan works best if you're healthy, rarely visit the doctor and can cover a large out-of-pocket expense if something serious happens. Bronze plans work better if you expect to need care beyond preventive visits but still want to keep the monthly cost low.

Health Insurance for an 18-Year-Old by State

Health insurance costs at 18 vary by state based on how many insurers compete in your Marketplace, local health care costs and state regulations. In our analysis of 2026 CMS data, Silver-tier premiums range from under $400 a month in lower-cost states to over $600 in higher-cost states.

The cost differences between states reflect insurer competition. States with fewer Marketplace carriers tend to see higher premiums because there's less price pressure. Use your state's average from the table as a baseline before comparing individual plans through HealthCare.gov.

Alaska
N/A
$638
N/A
N/A
Alabama
N/A
$310
N/A
$312
Arizona
$420
N/A
N/A
N/A
Arkansas
N/A
$438
$513
N/A
California
$411
$611
N/A
$691
Colorado
$387
N/A
N/A
$386
Connecticut
$411
$543
$526
N/A
Delaware
$471
$536
N/A
$492
Florida
$528
$996
$761
$645
Georgia
$478
$531
N/A
N/A
Hawaii
$400
$409
N/A
N/A
Idaho
$382
$346
$342
N/A
Illinois
$415
$582
$346
N/A
Indiana
$442
N/A
$304
$417
Iowa
$371
$354
N/A
$384
Kansas
N/A
N/A
N/A
$462
Kentucky
$454
N/A
N/A
N/A
Louisiana
$427
$656
$417
$438
Maine
$526
$600
N/A
N/A
Maryland
$290
$443
N/A
N/A
Massachusetts
$375
N/A
N/A
$485
Michigan
$380
$483
N/A
$323
Minnesota
$384
$376
N/A
$417
Mississippi
$370
N/A
N/A
$375
Missouri
N/A
N/A
N/A
$424
Montana
N/A
$434
$398
$453
Nebraska
N/A
$726
N/A
$595
Nevada
$442
N/A
N/A
$441
New Hampshire
$379
$558
N/A
$324
New Jersey
$905
N/A
N/A
$492
New Mexico
$448
N/A
N/A
N/A
New York*
N/A
N/A
N/A
N/A
North Carolina
$483
$582
$489
$444
North Dakota
$371
$409
N/A
N/A
Ohio
$441
N/A
N/A
N/A
Oklahoma
$395
$493
N/A
N/A
Oregon
N/A
N/A
N/A
$282
Pennsylvania
$387
$454
$339
$357
Rhode Island
$335
$494
$413
N/A
South Carolina
$384
$503
$379
$438
South Dakota
$334
$462
N/A
$476
Tennessee
N/A
N/A
N/A
$505
Texas
$404
N/A
$473
$468
Utah
$452
N/A
N/A
$392
Vermont
$1,135
N/A
N/A
$1,247
Virginia
$368
$754
N/A
$314
Washington
$328
N/A
N/A
$454
Washington, D.C.
$418
$496
N/A
N/A
West Virginia
$838
$633
N/A
N/A
Wisconsin
$468
$429
$679
$525
Wyoming
N/A
$667
N/A
$760

Health Insurance Costs for 18-Year-Olds by Plan Type

Plan type determines your monthly premium and how you access care. At the Silver tier, an HMO averages $480 a month for 18-year-olds, the lowest of the four plan types. An EPO averages $528 and a POS averages $527, both requiring you to stay in-network for most or all care.

A PPO averages $566 at the Silver tier, the highest of the four plan types. The additional monthly cost pays for flexibility: you can see any doctor, including specialists, without a referral and without staying in one provider network.

HMO
$270
$366
$368
$480
$515
$692
PPO
$328
$426
$444
$566
$580
$750
POS
$264
$371
$416
$527
$562
$806
EPO
$306
$373
$414
$528
$538
$872

*Your actual prices depend on the metal tier you choose, your plan type and where you live. The above-mentioned prices are for a typical 18-year-old on a Silver tier, so use these numbers as a ballpark when you start comparing plans in your state.   

At the Silver tier EPO averages $528 a month, within a dollar of a POS plan, but an EPO lets you see specialists directly without a primary care referral. For 18-year-olds who want mental health or specialist access, that difference matters.

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HEALTH INSURANCE PLAN TYPES FOR 18-YEAR-OLDS

Four plan types are available on the Marketplace, each with different rules for which doctors you can see and whether you need a referral.

  • HMOs (Health Maintenance Organizations): HMO plans keep costs low by requiring you to stay within a specific provider network. You'll choose a primary care doctor who coordinates your care and refers you to specialists. They are the better choice if you want predictable monthly costs and are comfortable seeing only doctors in one network.
  • PPOs (Preferred Provider Organizations): PPO plans offer the most flexibility. You can see any doctor without a referral, including out-of-network providers, though out-of-network care costs more. PPOs carry higher premiums. They're the better fit if you travel frequently or need to see doctors across multiple states.
  • EPOs (Exclusive Provider Organizations): EPO plans fall between HMOs and PPOs. You must stay in-network, but you don't need referrals to see specialists. This middle-ground option costs less than a PPO while giving you more choice than an HMO.
  • POS (Point-of-Service) Plans: POS plans mix HMO and PPO features. Some require referrals, others don't. Most cover out-of-network care at a higher cost, with premiums between HMO and PPO rates. Check your plan's rules before scheduling appointments. Costs vary for the same care depending on whether your provider is in the plan's network.

Which Is the Best Health Insurance Type for an 18-Year-Old?

The best health insurance at 18 varies by situation more than by age. A full-time worker with employer benefits has a different answer than a student in another state or someone managing a chronic condition. 

When neither employer coverage nor a parent's plan is available, check Medicaid eligibility first. Medicaid covers doctor visits, prescriptions, preventive care and mental health services at little or no monthly cost for those who qualify. Buy a Marketplace plan only after ruling out Medicaid.

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    If You're Working Full Time

    An employer plan is the easiest and most affordable choice because your job covers part of the cost. If your employer doesn’t offer one, a Marketplace plan is the next strongest option. A quick way to compare plans is to look at the monthly premium, deductible, and which doctors and pharmacies are in-network.

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    If You’re Self-Employed

    You can buy a Marketplace plan that fits your income and budget. Many 18-year-olds also stay on a parent’s or spouse’s plan because it’s simpler and often cheaper. If you rarely use medical care, a Bronze or Catastrophic plan keeps your monthly cost low.

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    You’re Unemployed or Your Income Is Low

    Medicaid is the most affordable option and can provide better coverage than you expect. It includes doctor visits, preventive care, prescriptions and mental health services. Medicaid eligibility is based on your own income, regardless of whether other family members have coverage.

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    You're a Student

    Some colleges offer their own student health plans, which is great if you want simple, campus-based care. If your school doesn't offer insurance, or if you want more control over your coverage, you can buy a Health Insurance Marketplace plan or apply for Medicaid. Check whether the network covers doctors near your school if you're still on a parent's plan.

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    If You're Married

    A Marketplace family plan or your spouse’s employer plan gives you the best balance of cost and coverage. You can also stay on a parent’s plan until age 26. Compare the networks to confirm you have in-network care where you actually live.

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    Single Parent

    When employer coverage is available, a job-based plan is usually the most cost-predictable route because your employer covers part of the premium. If that’s not available, a Marketplace family plan or Medicaid can offer strong coverage for both you and your child. Compare total costs carefully: premiums, deductibles and out-of-pocket limits matter more when you’re covering two people.

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    Unhealthy or Chronic Illness

    For 18-year-olds with chronic conditions, a plan with a higher premium and lower deductible is often the better choice. HMO plans work for 18-year-olds comfortable with a limited network. A PPO is the better choice for those who need specialist care or out-of-network coverage.

Which Health Insurance Should You Buy as an 18-Year-Old?

Employer coverage is the first place to check. When a job covers part of your premium, your monthly cost is often a fraction of what a standalone Marketplace plan costs. A parent's plan costs nothing extra for you in most cases if you're already enrolled, confirm the network covers your location.

Medicaid is free or near-free for those who qualify, and covers doctor visits, prescriptions, preventive care and mental health services. Income thresholds vary by state, check HealthCare.gov or your state Medicaid office to confirm eligibility before shopping Marketplace plans.

On the Marketplace, most 18-year-olds qualify for income-based subsidies that bring monthly costs below the published rates. Silver plans average $477 a month before subsidies. Start at HealthCare.gov to see your actual price after subsidies are applied.

Frequently Asked Questions

How We Calculated the Cost of Health Insurance for 18-Year-Olds

Health insurance costs for 18-year-olds vary based on where you live, which plan type you choose and what coverage level you need. We analyzed marketplace data to show what you'll actually pay at 18. 

Our Data Source 
Plan data comes from the Centers for Medicare & Medicaid Services (CMS) government website. We analyzed individual marketplace plans from multiple insurance providers across all 50 states and Washington, D.C. 

Sample Profile Used
All cost data reflects what an 18-year-old pays for health insurance in 2026. This age represents young adults entering the individual marketplace for the first time, whether transitioning from a parent's plan, starting a first job or heading to college.

Coverage Types Analyzed
The analysis covers all metal tiers (Catastrophic, Bronze, Expanded Bronze, Silver, Gold and Platinum) and plan types (HMO, EPO, POS and PPO). This shows the full range from lowest-cost Catastrophic plans to Platinum plans with the most extensive coverage.

State-by-State Analysis
We calculated average costs for each state separately because premiums vary by location. An 18-year-old in Alabama pays roughly half what someone in Alaska pays for the same Silver plan.

Why This Approach Works for You
Most health insurance cost data mixes all ages together, which inflates what 18-year-olds actually pay. We isolated costs for your age group. Every figure reflects what an 18-year-old pays in 2026, not a blended average inflated by older policyholders.

Data Recency
All plan data and premium calculations reflect 2026 marketplace rates, including the latest subsidy structures and state-specific pricing.

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About Mark Fitzpatrick

Mark Fitzpatrick, Licensed P&C Insurance Expert, MoneyGeek

Mark Fitzpatrick, a licensed Property and Casualty (P&C) Insurance Producer in Connecticut, is MoneyGeek's resident expert in insurance and economics. He has spent nearly a decade covering the insurance market at LendingTree and MoneyGeek, analyzing hundreds of carriers and millions of rates across auto, home, renters, health and life insurance.

His work has appeared in The Washington Post, The New York Times and NPR. He draws on independent cost and consumer experience data, and no insurance company partnerships affect his recommendations.

Mark studied at Boston College and later earned a master's in economics and international relations from Johns Hopkins University. He worked in financial risk management at State Street before joining MoneyGeek. He's also a five-time “Jeopardy!” champion.

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