Health insurance costs work through a cost-sharing structure between you and your plan. Marketplace plans require you to pay a monthly premium for coverage, meet a deductible before your plan starts paying, then share costs through copayments or coinsurance until you reach your out-of-pocket maximum. For 2026, the maximum out-of-pocket limit is $10,600 for individuals and $21,200 for families.
How Does Health Insurance Work?
Updated: April 22, 2026
Advertising & Editorial Disclosure
Key Takeaways
Health insurance works by splitting costs: you pay monthly premiums, meet your deductible, then pay copays or co-insurance.
Marketplace plans cover 10 essential health benefits, including doctor visits, hospital stays, prescription drugs, mental health services and preventive care.
Get enough coverage to limit your financial risk. Match your plan to how much care you expect to use.
How Do Health Insurance Costs Work?
Pay your premium
Your monthly payment to keep coverage active, paid whether you use health care services or not. Insurers set premiums based on five factors: age (up to three times higher for older adults), location, tobacco use (up to 50% more), individual versus family enrollment and plan category. Bronze plans have the lowest monthly premiums but highest out-of-pocket costs, while Platinum plans have the highest premiums and lowest out-of-pocket costs.
Meet your deductible
The amount you pay for covered services before your plan starts sharing costs. Preventive care such as annual checkups, flu shots, vaccinations and wellness screenings is covered at 100% by all Marketplace plans even before you meet your deductible when you use in-network providers.
Share costs through copayments and coinsurance:
After meeting your deductible, you share costs with your health plan. Copayments are fixed amounts (like $20 for a doctor visit), while coinsurance is a percentage you pay (usually 20%) and your plan pays the rest (80%). PPO plans allow out-of-network care but charge higher coinsurance, often 40%.
Reach your out-of-pocket maximum
After you pay $10,600 for individuals or $21,200 for families in covered expenses during 2026, Marketplace plans pay 100% of covered in-network services through the end of the year. Your premium continues each month, but you pay nothing for covered medical care after reaching this limit.
Access no-cost preventive care
Preventive services including annual checkups, immunizations, screening tests and wellness visits are covered at 100% when you use in-network providers, even before meeting your deductible. Catastrophic plans cover at least three primary care visits per year at no cost before you meet your deductible.
HOW PROVIDER NETWORKS AND HEALTH SAVINGS ACCOUNT IMPACT YOUR COSTS?
Provider networks and Health Savings Accounts (HSAs) are two mechanisms that reduce your out-of-pocket costs within the health insurance system.
- Use in-network providers: In-network providers contract with health plans to offer discounted rates. People without insurance pay about twice as much for the same care. You'll pay less for an office visit in-network ($85) compared to someone without coverage ($150), even before meeting your deductible. HMO and EPO plans limit coverage to in-network care except in emergencies.
- Consider a Health Savings Account: All 2026 Bronze and Catastrophic plans are eligible for Health Savings Accounts, which let you set aside pre-tax money for medical expenses like deductibles, copayments and coinsurance. Money you don't spend rolls over year to year.
What Does Health Insurance Cover?
Health insurance covers ten essential health benefit categories required under the Affordable Care Act. These include doctor visits, hospital stays, prescription drugs, preventive care, mental health services and emergency care. Marketplace plans pay for preventive services at no cost when you use in-network providers. Coverage structures differ between HealthCare.gov plans, employer-sponsored insurance and Medicare, with each offering different copays, co-insurance and deductibles.
Essential Health Benefits
Plans sold on HealthCare.gov and through employers must cover 10 benefit categories. These include outpatient care, emergency services, hospitalization, maternity care, mental health and substance use disorder services, prescription drugs, rehabilitation, lab services, preventive care and pediatric dental and vision. Insurance companies can't impose annual or lifetime dollar limits on these benefits under federal law. Large employers who self-insure aren't required to offer all 10 categories but many do.
Preventive Care Services
Preventive care costs you nothing with in-network providers. Services include wellness visits, blood pressure checks, cholesterol tests, diabetes screenings and cancer screenings like mammograms and colonoscopies. You also get immunizations and contraceptive services. No copay. No co-insurance. No deductible. Catching health problems early costs less than treating advanced conditions.
Prescription Drug Coverage
Most plans include prescription drug benefits. But covered medications vary by formulary. UnitedHealthcare, Blue Cross Blue Shield and Aetna organize drugs into tiers. Generic drugs are in lower-cost tiers. Brand-name and specialty drugs cost more. Your copay or co-insurance changes based on the tier. Some medications need prior authorization before coverage begins. Check your formulary before filling prescriptions.
Common Exclusions
Health insurance doesn't cover everything. Plans exclude routine adult dental care and routine adult vision care. You'll need separate policies for those. Plans also exclude cosmetic procedures, weight loss surgery unless medically necessary, fertility treatments, alternative medicine like acupuncture and long-term care. Experimental treatments the FDA hasn't approved aren't covered.
How Can You Get Health Insurance?
Employer plans, the Health Insurance Marketplace, Medicaid, Medicare and direct insurer purchases are your main coverage sources, each with its own eligibility rules and enrollment windows.
Job loss opens a 60-day Special Enrollment Period to buy a Marketplace plan. COBRA keeps your group coverage active after leaving a job, but you'll pay the full premium plus a 2% administrative fee. Costs and covered benefits differ enough between sources that comparing options before you commit can save you hundreds per year.
Employer-Sponsored Insurance | Your employer covers part of the premium, and you pay the remaining share for yourself and any dependents. You can sign up during your company’s open enrollment period or within 30 days of starting a new job. If you’re under 26, you may be added to a parent or guardian’s employer plan. Reach out to your HR team to review eligibility and available plan options. |
Health Insurance Marketplace | You can get coverage through HealthCare.gov by creating an account and completing an application. To start coverage on January 1, enroll by December 15. If you enroll between December 16 and January 15, 2026, coverage begins February 1. Certain life events, such as losing coverage, moving, getting married or having a baby, allow you to enroll outside the standard window. Many applicants qualify for premium tax credits based on income. |
Medicaid and CHIP | Medicaid and Children's Health Insurance Program offer low-cost or no-cost coverage for those who meet eligibility requirements. Qualification depends on factors like income, household size, disability and age. You can apply through HealthCare.gov or your state Medicaid office. If you appear eligible, your application is sent to your state for review. Children may qualify for CHIP even if their parents do not meet Medicaid requirements. |
Medicare | Medicare is federal health insurance for people 65 and older. You qualify at age 65 if you’re a U.S. citizen or a permanent legal resident who has lived in the country for at least five continuous years. If you begin receiving Social Security retirement benefits before turning 65, enrollment in Medicare Part A and Part B happens automatically at that time. You can join, change or drop a Medicare Advantage plan or prescription drug plan during set enrollment periods. For assistance, contact Social Security at 1-800-772-1213 or visit Medicare.gov. |
Direct from Insurance Companies | You can buy private health insurance directly from insurers such as Blue Cross Blue Shield, UnitedHealthcare or Aetna, or through a licensed agent or broker. These plans don’t include Marketplace financial assistance and may leave out benefits like maternity care or mental health services. Contact insurers or work with an agent to review your options and enroll. |
How Much Health Insurance Should You Get?
The right amount of health insurance depends on how often you expect to need care and how much cost you’re willing to take on. Plans in the ACA marketplace come in four metal tiers, each offering a different mix of monthly premiums and out-of-pocket expenses. Lower-premium plans keep monthly costs down but leave you paying more when you receive care. Higher-premium plans cost more each month but reduce what you pay when you use medical services.
- 1Match the plan to your health needs
If you take prescription drugs or see specialists regularly, a Gold or Platinum-tier plan on HealthCare.gov costs less over the year for most people. Bronze and Silver-tier plans are better suited for people who rarely need care and want lower monthly costs.
- 2Weigh the premium vs. deductible tradeoff
Your deductible is what you pay before your health plan starts covering costs. Bronze-tier plans carry deductibles above $5,000 for individuals. But Gold-tier plans have lower deductibles, with higher monthly premiums to offset the difference. Compare what each tier costs at different levels of care use before enrolling.
- 3Focus on total cost, not just the monthly premium
Add your annual premium to your expected out-of-pocket costs. In 2026, ACA marketplace plans cap annual out-of-pocket spending at $10,600 for an individual and $21,200 for a family, per HealthCare.gov. So that ceiling is the most you'll pay in any plan year.
- 4Compare plans using HealthCare.gov's tools
HealthCare.gov's plan comparison tool shows premiums, deductibles, copays and out-of-pocket maximums side by side. Use the cost estimator to model your expected annual spending across plan tiers.
- 5Don't miss open enrollment
HealthCare.gov's open enrollment runs November 1 through January 15 each year. Miss that window and you'll need a qualifying life event, such as job loss, marriage or the birth of a child, to enroll outside it.
How Health Insurance Works: Bottom Line
Understanding how health insurance works starts with knowing your costs. You pay monthly premiums, meet a deductible, then share remaining costs through copays or co-insurance. Marketplace plans must cover 10 essential health benefits by law. Match your plan tier to how much care you expect to use and you'll spend less overall.
How Health Insurance Works: FAQ
We've answered common questions about how health insurance works:
How does health insurance work through an employer?
Your employer pays part of your monthly premium, and the rest comes out of your paycheck. Enroll during open enrollment or within 30 days of starting a new job. You can add dependents to your plan. If you're under 26, a parent's employer plan may cover you.
How does health insurance work for individuals?
You can get individual health insurance through HealthCare.gov, directly from insurers like Blue Cross Blue Shield, UnitedHealthcare or Aetna, or through a licensed broker. Marketplace plans may qualify for premium tax credits based on your income. Plans bought directly from insurers don't qualify for tax credits and may not include essential health benefits.
How does health insurance work if I have a pre-existing condition?
Marketplace and employer plans can't deny coverage or charge more because of a pre-existing condition. ACA-compliant plans sold through HealthCare.gov can't impose annual or lifetime dollar limits on essential health benefits. Plans bought directly from insurers outside the Marketplace may not have the same protections, so check plan details before enrolling.
How does health insurance work when you change jobs?
You have 60 days after losing job-based coverage to enroll in a Marketplace plan through a Special Enrollment Period. COBRA lets you keep your former employer's plan, but you'll pay the full premium plus a 2% administrative fee. Compare COBRA costs against Marketplace options before deciding.
How does out-of-network coverage work?
Out-of-network coverage depends on your plan type. PPO plans cover out-of-network care but charge higher co-insurance, often 40% compared to 20% in-network. HMO and EPO plans don't cover out-of-network care except in emergencies. Check whether a provider is in-network before scheduling care to avoid higher costs.
How does health insurance coordination of benefits work?
Coordination of benefits applies when you're covered under more than one health plan. One plan is primary and pays first. The second plan may cover some or all remaining costs, which can lower your out-of-pocket spending. Contact both insurers to confirm which plan pays first before receiving care.
Related Articles
About Mark Fitzpatrick
Mark Fitzpatrick, a Licensed Property and Casualty (P&C) Insurance Producer in Connecticut, is MoneyGeek's resident insurance expert. He has analyzed the insurance market for almost a decade, first with LendingTree and now with MoneyGeek, conducting original research on hundreds of insurance companies and millions of insurance rates for insurance shoppers.
He writes about economics and insurance on MoneyGeek, breaking down complex topics so people can have confidence in their purchase. Like all MoneyGeek analysts, Mark collects and analyzes independent cost and consumer experience data on insurance companies to provide objective recommendations in our content that are independent of any of MoneyGeek's insurance company partnerships.
His insights — on products ranging from car, home and renters insurance to health and life insurance — have been featured in The Washington Post, The New York Times and NPR among others.
Mark holds a master’s degree in economics and international relations from Johns Hopkins University and a bachelor’s degree from Boston College. He started his career working in financial risk management at State Street before transitioning to analysis of the personal insurance market. He's also a five-time Jeopardy champion!