Updated September 2026 · 10 min read
People use the word subsidy for two completely different kinds of financial help, and confusing them is one of the most expensive mistakes in health insurance. One lowers your monthly premium. The other lowers your deductible and out-of-pocket costs.
Understanding which one you are getting — and why the second one only works on Silver plans — can change what you pay by thousands of dollars over a year.
The premium tax credit reduces what you pay each month. The cost-sharing reduction reduces what you pay when you actually use care — your deductible, your copays and your out-of-pocket maximum.
A household can qualify for one, both, or neither. They are calculated separately and they have different eligibility rules.
Eligibility is not a single income cut-off. Several conditions have to be met together, and the income rules themselves have been changed by Congress more than once — which is why any specific figure you read online may be out of date.
For most households, the figure that matters is your modified adjusted gross income — wages, self-employment income, unemployment, Social Security benefits that are taxable, and other income for everyone you include on your tax return.
This is why self-employed clients need to be careful. A rough guess can be wrong in either direction: estimate too high and you leave money on the table, estimate too low and you may owe it back at tax time.
The Marketplace looks at the cost of a benchmark Silver plan in your area — a mid-level reference plan, not necessarily the one you will buy. It then compares that cost to a percentage of your household income, which is set each year.
If the benchmark plan costs more than that share of your income, the difference becomes your credit. You can apply it to any Marketplace plan, so a lower-cost Bronze plan may end up almost entirely covered, while a Gold plan would still carry a higher premium.
Most people take the credit in advance, which means the Marketplace pays it straight to the insurer and you see a lower monthly premium. The alternative is to pay full price and claim the credit on your tax return.
Advance credits are reconciled against your actual income when you file. If you earned more than you estimated, you may have to repay some of it. If you earned less, you may get more back. This is why reporting income changes during the year is not optional — it is the difference between a small adjustment and an unpleasant surprise.
Cost-sharing reductions are only available on Silver plans, and only to households below an income threshold set each year. They reduce your deductible, your copays and your out-of-pocket maximum — sometimes substantially.
The practical effect is that for a qualifying household, a Silver plan can have a lower total cost for the year than a Bronze plan with a cheaper premium. Shopping on premium alone is how people end up paying more for less coverage.
If you are offered coverage through an employer, you are generally not eligible for a premium tax credit — unless that coverage fails an affordability test the government sets each year, or does not meet a minimum standard of coverage.
Affordability is measured against your household income and the cost of the cheapest self-only plan offered to you. It is worth checking rather than assuming, because a plan that feels unaffordable to you may or may not fail the test as it is defined.
Below the Marketplace income floor, an application is generally routed to Medicaid instead. Whether you actually qualify depends on your state, and Florida has not expanded Medicaid — which means many adults with very low income do not qualify for Medicaid and may not be eligible for a premium tax credit either.
If you think you may be in that situation, it is worth a conversation before you assume you have no options. The rules here are genuinely counterintuitive.
Everything in this article comes down to one number on your application: your expected household income for the coverage year. Get it roughly right and the credit works the way it should. Get it wrong in either direction and you either leave money on the table or owe it back.
We build that estimate with you from your actual income sources, and we revisit it when the year turns out differently than expected.
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