Health Insurance

Health Insurance Marketplace

The marketplace, also called the exchange, is where most people shop for ACA plans and access premium tax credits to reduce their monthly premium.

Last reviewed: May 2026 · Editorial methodology

Definition

The Health Insurance Marketplace (also known as the Exchange) is the shopping and enrollment platform created by the ACA where individuals, families, and small businesses can compare and purchase qualified health plans (QHPs). The federal marketplace operates at HealthCare.gov and serves states that did not establish their own exchange; 21 states and the District of Columbia run their own state-based marketplaces including Covered California, NY State of Health, and GetCoveredNJ. All marketplace plans must cover the ten Essential Health Benefits, cannot deny coverage for preexisting conditions, and must be organized into Bronze, Silver, Gold, or Platinum metal tiers. Premium tax credits and cost-sharing reductions are available exclusively through the marketplace for eligible enrollees. Open enrollment typically runs from November 1 through January 15 in most states, though state-based marketplaces may set different windows. Special enrollment periods allow qualifying individuals to enroll outside open enrollment when a qualifying life event occurs.

Where this term matters

Health Insurance →/life-events →

Tip

Glossary definitions are educational. Always check your own policy language — insurers can define common terms differently from one another. When in doubt, request a written explanation from your agent.

Related terms

ACA (Affordable Care Act)The ACA established consumer protections including guaranteed issue, coverage of preexisting conditions, and subsidized marketplace insurance for millions of Americans.Premium Tax CreditThe premium tax credit (PTC) makes marketplace coverage affordable by offsetting a portion of your monthly premium based on your income and the cost of the benchmark Silver plan.Cost-Sharing Reduction (CSR)CSRs reduce out-of-pocket costs for Silver plan enrollees with household incomes between 100% and 250% of the federal poverty level.Metal Tier (Bronze/Silver/Gold/Platinum)Metal tiers signal how a plan splits costs with you: higher tiers mean higher premiums but lower out-of-pocket costs when you need care.Open Enrollment PeriodOpen enrollment is your primary annual opportunity to choose or update health coverage; missing it typically means waiting another year without a qualifying life event.Special Enrollment Period (SEP)An SEP gives you typically 60 days after a qualifying life event to get health coverage without waiting for open enrollment.

Related guides

Source: Cover Forge USA editorial team|Last verified: May 2026|Methodology
Definitions are educational and may be simplified. Always refer to your policy contract and consult a licensed agent for terms that affect coverage decisions.
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Cover Forge USA Editorial Team

Editorial Lead

This article was researched and written by the Cover Forge USA editorial team against federal sources (NAIC, CMS, FEMA, DOL, SSA, state DOIs) and standard policy forms. Bylines organize content by topic — they do not assert individual licensure. See our editorial-policy for details.

Reviewed June 2026

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