How Marketplace Subsidies Lower Your Health Insurance Costs

What marketplace subsidies actually do

A marketplace subsidy is money the federal government sends directly to your insurance company to lower your monthly premium. You do not receive it as a check — the insurer deducts it from what you owe. The amount depends on your household income and family size, and it changes every year based on what you report during open enrollment.

There are two types. A premium tax credit reduces your monthly bill. A cost-sharing reduction lowers the deductible, copays, and coinsurance you pay when you actually use care. You can receive one, both, or neither, depending on your income level and which plan you choose.

The subsidy is available only if you buy insurance through the Health Insurance Marketplace (also called the Exchange) in your state — not through an employer, Medicaid, Medicare, or a plan sold directly by an insurer. If you are self-employed, between jobs, or your employer does not offer coverage, the Marketplace is where you look.

Key Takeaways

• Subsidies are calculated based on your expected household income for the year ahead, so you report your income during open enrollment, not after taxes are filed.
• If your actual income ends up higher than you predicted, you may owe back some of the subsidy when you file taxes the following year.
• You must report changes in income, family size, or job status within 60 days to keep your subsidy accurate and avoid a large tax bill later.
• Cost-sharing reductions are only available on Silver plans, even though premium credits work with any metal level (Bronze, Silver, Gold, Platinum).
• The amount of subsidy you receive is recalculated every year during open enrollment, which runs from November through January in most states.

How income determines your subsidy amount

The federal government uses a figure called your Modified Adjusted Gross Income (MAGI) to decide how much subsidy you receive. This is not quite the same as your tax return income — it includes some things the IRS does not count as taxable income, like certain foreign earnings or tax-exempt interest.

You are may be able to access for a subsidy if your MAGI falls between 100% and 400% of the federal poverty line for your household size. In 2024, that means a single person earning between roughly $14,600 and $58,400 per year could receive a subsidy, though the exact range changes annually. A family of four earning between roughly $30,000 and $120,000 would fall in that range. These numbers shift every year, and they vary by state.

The closer your income is to the poverty line, the larger your subsidy. Someone earning 150% of poverty gets more help than someone earning 350% of poverty. The Marketplace calculator on Healthcare.gov shows you an estimate based on the income you enter, but the actual amount is determined when you complete your application.

What happens if your income changes during the year

Your subsidy is based on the income you predict for the current year, not what you actually earned last year. If you get a raise, lose a job, have a baby, or get married, your income and family size both change — and so does your subsidy.

You have 60 days to report a major life change to the Marketplace. Major changes include losing job-based coverage, getting married or divorced, having a child, moving to a different state, or a significant change in income. When you report the change, your subsidy is recalculated immediately, and your new premium takes effect the following month.

If you do not report a change and your actual income ends up higher than you said it would be, you will owe back the extra subsidy you received when you file your taxes. If your income drops and you did not report it, you may have paid more than you needed to, but you can claim the difference as a refund on your tax return.

Premium tax credits versus cost-sharing reductions

A premium tax credit lowers your monthly payment to the insurance company. If your credit is $200 per month and the plan costs $400, you pay $200. This credit works with any plan metal level — Bronze, Silver, Gold, or Platinum.

A cost-sharing reduction lowers what you pay when you go to the doctor, fill a prescription, or stay in the hospital. It reduces your deductible (the amount you pay before insurance kicks in), your copays (fixed fees per visit), and your coinsurance (your percentage of the bill after the deductible). Cost-sharing reductions are only available if you choose a Silver plan, even if you also receive a premium credit.

Many people receive both. Your income determines whether you get a premium credit, and if you do, a separate calculation determines whether you also get cost-sharing reductions. The Marketplace application walks you through both, and the calculator shows what you would pay under different plans.

How to report your income and enroll

Open enrollment runs from November 1 through January 15 each year in most states. (A few states run their own Marketplaces with different dates — check your state's website.) During this window, you go to Healthcare.gov (or your state's Marketplace site) and create an account or log into an existing one.

You will answer questions about your household size, your expected income for the year ahead, and whether anyone in your household has access to job-based coverage. The Marketplace uses this information to calculate your subsidy. You then choose a plan and enroll. The subsidy is applied automatically — you do not have to do anything else to receive it.

If you have a may have access to life event outside open enrollment — such as losing coverage, getting married, or having a baby — you can enroll in a Special Enrollment Period, which usually lasts 60 days from the date of the event. You will need to provide proof of the event, such as a termination letter from your employer or a birth certificate.

What to do if your subsidy seems wrong

If the Marketplace calculates a subsidy that seems too low or too high, first check that you entered your income correctly. Income includes wages, self-employment income, Social Security, unemployment benefits, and some other sources. It does not include child support you receive or certain veteran benefits.

If you believe your income was entered incorrectly, you can update it in your Marketplace account and your subsidy will recalculate. If you think the Marketplace is using the wrong definition of income, you can contact the Marketplace directly — Healthcare.gov has a phone line (1-800-318-2596) and live chat during business hours.

You can also speak with a certified enrollment counselor, who works for a nonprofit and does not charge you. To find one near you, search for "enrollment counselor" on Healthcare.gov or call 211 and ask for Marketplace help in your area.

Reconciling your subsidy at tax time

When you file your taxes the following year, you report how much subsidy you received during the year and compare it to how much you should have received based on your actual income. This is called reconciliation. If you received more than you should have, you owe the difference back to the IRS — it reduces your refund or increases what you owe. If you received less, the difference is added to your refund.

This is why reporting income changes matters. If you predicted $50,000 in income but actually earned $65,000, you received a larger subsidy than you were may have access to to. The IRS will ask you to repay the overage. If the overage is large, it can wipe out your entire tax refund or leave you owing money.

There are limits on how much you have to repay if your income was close to your prediction. For 2024, if your income was between 100% and 200% of poverty, you owe back no more than $350 as a single person or $700 for a family. These caps are higher for people with income above 200% of poverty and change each year.

Frequently Asked Questions

Can I get a subsidy if I have a job that offers health insurance?

Only if the coverage your employer offers is unaffordable or does not cover a large portion of costs. The Marketplace checks whether your employer's lowest-cost plan costs more than about 8.5% of your household income. If it does, you may be able to buy through the Marketplace instead and receive a subsidy. You will need your employer's plan information when you apply.

What if I do not know my exact income for next year?

Make your best estimate based on what you expect to earn. If you are self-employed or have variable income, use an average of recent months or your best guess. You can update your income later if circumstances change. It is better to estimate conservatively (slightly higher than you think) to avoid owing money back at tax time.

Do I lose my subsidy if I get a raise?

Not automatically. Your subsidy is based on the income you reported for that year. If you get a raise mid-year, you should report it to the Marketplace within 60 days. Your subsidy will be recalculated based on your new expected annual income, and your premium may go up. If you do not report it and your year-end income is higher, you will owe back part of the subsidy when you file taxes.

Can I use a subsidy with any insurance plan?

Premium credits work with any plan sold on the Marketplace, regardless of metal level. Cost-sharing reductions only work with Silver plans. If you want to reduce both your monthly premium and your out-of-pocket costs when you use care, a Silver plan with both types of subsidy is usually the best choice.

What happens to my subsidy if I move to a different state?

Your subsidy stops on the last day of the month you move. You will need to enroll in your new state's Marketplace (or Healthcare.gov if your state does not run its own) and report your move as a may have access to life event. Your new subsidy is calculated based on your income and the plans available in your new state, which may be different from what you had before.