Marketplace (ACA) Basics

The Affordable Care Act (ACA) created federal and state Marketplaces — online exchanges where individuals and families can compare and enroll in private health insurance plans. These plans must cover a set of essential health benefits, cannot deny you coverage for pre-existing conditions, and are the only path to the income-based premium tax credits that make coverage more affordable.

Plans are grouped into four metal tiers based on how much of your healthcare costs they cover on average. Bronze plans cover about 60%, Silver about 70%, Gold about 80%, and Platinum about 90%. The tier does not reflect quality of care — it reflects the cost-sharing split between you and the insurer. Bronze has the lowest premium but the highest out-of-pocket costs; Platinum is the reverse.

Your premium also depends on your age, where you live, tobacco use, and which insurance company you choose. Importantly, a plan's premium is not solely based on your health — insurers can no longer charge you more or refuse you because of a medical condition.

To get the tax credit, you must enroll through the Marketplace rather than buying directly from an insurer. The estimate is based on your expected household income for the coming year, and the credit is typically applied directly to your monthly premium. If your actual income ends up different from what you estimated, you may pay back some of the credit or receive more at tax time.

You can enroll during the annual Open Enrollment Period, or outside of it if you have a qualifying life event like marriage, a baby, or job loss. Because every family's income picture is different, it helps to have a licensed agent walk through your numbers and show you the plans where the subsidy goes furthest.