A cost sharing reduction is a federal discount built into certain marketplace health plans that lowers what you pay out of pocket each time you use care. If your household income falls between 100% and 250% of the federal poverty level and you enroll in a Silver plan through the Health Insurance Marketplace, your deductible, copays, coinsurance, and annual out-of-pocket maximum are all reduced compared with what other Silver enrollees pay for the same plan. The savings are automatic once you’re enrolled and apply at the point of care, not as a reimbursement later.
Who Qualifies
Four things all have to be true.
Your household income has to land between 100% and 250% of the federal poverty level (FPL). For 2026, 100% FPL is $15,960 for a single person and $33,000 for a family of four.1U.S. Department of Health and Human Services. 2026 Poverty Guidelines At 250% FPL, those figures rise to roughly $39,900 for an individual and $82,500 for a family of four.
You have to enroll in a Silver-level plan. Bronze, Gold, and Platinum plans never carry the discount, even if your income qualifies. Catastrophic plans are excluded as well.2HealthCare.gov. Cost-Sharing Reductions
You have to be eligible for the premium tax credit (PTC). Federal law ties the two benefits together: no month of cost-sharing assistance is allowed unless you also qualify for a PTC in the same month.3Office of the Law Revision Counsel. 42 U.S.C. 18071 – Reduced Cost-Sharing for Individuals Enrolling in Qualified Health Plans You don’t have to actually use the PTC against your premium, but you have to be eligible.
And you have to buy the plan through the Health Insurance Marketplace, either HealthCare.gov or your state’s exchange. A Silver plan bought directly from an insurer outside the marketplace carries no discount.2HealthCare.gov. Cost-Sharing Reductions
How Much the Discount Is Worth
The size of the reduction depends on where your income falls within the eligible range. There are three tiers.
- At 100–150% FPL, the plan is enhanced to cover about 94% of average medical costs, up from a standard Silver plan’s roughly 70%.
- At 150–200% FPL, the plan covers about 87% of costs, closer to what a typical Gold plan pays.
- At 200–250% FPL, the plan covers about 73% of costs, a smaller but still meaningful boost.3Office of the Law Revision Counsel. 42 U.S.C. 18071 – Reduced Cost-Sharing for Individuals Enrolling in Qualified Health Plans
The numbers that matter most to your wallet are the deductible and the annual out-of-pocket maximum. A standard Silver plan’s average deductible runs around $5,300. In the 94% tier it drops to about $790. In the 87% tier, roughly $1,700. In the 73% tier, about $3,700. These are averages across plans and insurers, but the pattern is consistent.
The out-of-pocket maximum, which is the ceiling on your total spending for covered services in a year, falls hard too. On a typical Silver plan it’s around $10,600 for 2026. In the 94% and 87% tiers it drops to roughly $3,500. In the 73% tier, about $8,450. Once you hit that cap, the insurer pays 100% of covered costs for the rest of the plan year.
Copays and coinsurance are reduced inside the plan itself, so the lower amounts show up automatically when you check in at a doctor’s office or pick up a prescription. No forms, no reimbursement wait.
When Employer Coverage Blocks You
If your job offers health insurance that meets federal affordability and coverage standards, you generally can’t get marketplace subsidies, including the cost-sharing discount. For 2026, employer coverage counts as “affordable” if your share of the premium for self-only coverage is 9.96% or less of household income.4Internal Revenue Service. Revenue Procedure 2025-25 The plan also has to provide minimum value, meaning it covers at least 60% of average costs.
If your employer’s plan fails either test, you can decline it and shop the marketplace with full access to premium tax credits and cost-sharing reductions. Running the numbers is worth the time: a CSR-enhanced Silver plan can save you more than an employer plan that technically counts as “affordable” under the formula but still carries steep cost-sharing.
Special Rules for Immigrants and Tribal Members
Non-citizens who are lawfully present in the United States qualify for marketplace coverage and the cost-sharing discount under the same income rules as citizens. “Lawfully present” covers permanent residents, refugees, asylees, people with Temporary Protected Status, and holders of valid non-immigrant visas, among others.5HealthCare.gov. Health Coverage for Lawfully Present Immigrants As of mid-2025, DACA recipients lost marketplace eligibility, though ongoing litigation has created some uncertainty. If your status is unclear, the marketplace application will determine your eligibility.
Members of federally recognized tribes and shareholders of Alaska Native Claims Settlement Act corporations get enhanced protections that go beyond standard CSRs. Tribal members earning 100–300% FPL can enroll in a zero cost-sharing plan at any metal level, with no deductibles, copays, or coinsurance for covered services. Tribal members at other income levels qualify for limited cost-sharing, which eliminates cost-sharing on care received from Indian health providers.6Centers for Medicare & Medicaid Services. Working with American Indians and Alaska Natives – Information and Tips for Agents and Brokers One catch: if a tribal member enrolls on the same policy as non-tribal household members, these benefits don’t apply. A separate policy from non-tribal family members preserves the protections.
How to Apply
You apply for the cost-sharing discount and the premium tax credit through a single marketplace application at HealthCare.gov or your state’s exchange. There’s no separate CSR form. The system determines eligibility for both based on what you report.
Before you start, pull together Social Security numbers for every household member (including anyone not applying for coverage), income documentation such as W-2s, pay stubs, or self-employment records, policy numbers for any current coverage, and a count of everyone in your household who files taxes together or is claimed as a dependent.7Health Insurance Marketplace. Get Ready to Apply for or Re-Enroll in Your Health Insurance Marketplace Coverage The marketplace counts wages, tips, self-employment income, unemployment benefits, Social Security, retirement income, investment income, rental income, and alimony from pre-2019 divorce agreements.
The application asks you to project income for the coverage year, not just report what you earned last year. If you expect a raise, a job change, or seasonal swings, build those in. Overestimating can push you out of a tier you’d otherwise qualify for; underestimating can leave you owing back excess premium tax credits at tax time.
Once your eligibility notice comes back, shop Silver plans. If the marketplace tells you that you qualify for the cost-sharing discount, picking any other metal level walks away from the savings.8HealthCare.gov. Health Plan Categories – Bronze, Silver, Gold, and Platinum The Silver plans you see already reflect your reduced deductible, copays, and out-of-pocket maximum, so you’re comparing final numbers against final numbers.
When You Can Enroll
Enrollment runs on fixed windows. The 2026 Open Enrollment Period on the federal marketplace ran from November 1, 2025, through January 15, 2026. Plans selected by December 15, 2025, started January 1, 2026; selections after that but before the January 15 deadline started February 1.9Centers for Medicare & Medicaid Services. Marketplace 2026 Open Enrollment Fact Sheet Some state exchanges set their own deadlines.
Outside Open Enrollment, a qualifying life event triggers a Special Enrollment Period. Common triggers include losing existing coverage (a job-based plan, a parent’s plan at 26, or Medicaid), moving to a new ZIP code or county, getting married, having or adopting a child, or gaining a dependent through a court order. Separately, if you’re PTC-eligible and your estimated income falls to or below 150% FPL, you qualify for a Special Enrollment Period even without another life event.10Centers for Medicare & Medicaid Services. Understanding Special Enrollment Periods The window typically lasts 60 days from the event.
Keeping the Benefit
Your CSR tier is based on the income you projected when you applied, so changes during the year can shift it. If your income drops, you may qualify for a more generous tier or even Medicaid. If it rises above 250% FPL, you can lose the cost-sharing discount entirely. Update the marketplace as soon as something changes.11HealthCare.gov. Reporting Income, Household, and Other Changes Unlike the premium tax credit, CSRs aren’t reconciled at tax time: you won’t owe money back for help you received, but you also can’t retroactively claim a higher tier you should have been in.
When the marketplace can’t match the income you reported against federal data, it flags a data matching inconsistency. You’ll get a notice and 90 days to send supporting documents like tax returns or pay stubs. If you need more time, you can call the Marketplace Call Center to request a 60-day extension by showing a good-faith effort to pull the paperwork together.12Centers for Medicare & Medicaid Services. How to Resolve Income Data Matching Inconsistencies Ignoring the notice is the mistake to avoid: the marketplace will reset your eligibility based on the data it has, which can mean losing the discount or your premium tax credit along with it.