What Are Cost-Sharing Reductions and How Do They Work?

Cost sharing reductions are discounts the federal Health Insurance Marketplace applies to a Silver-tier plan so that you pay less at the doctor, pharmacy, and hospital. They lower your deductible, copays, coinsurance, and annual out-of-pocket maximum, and you qualify if your household income falls between 100% and 250% of the federal poverty level. Unlike the premium tax credit, which trims your monthly bill, these reductions kick in when you actually use care, so a Silver plan ends up behaving more like a Gold or Platinum plan without the higher premium.

Who Qualifies

Two things have to line up: your income and your plan choice. Household income must sit between 100% and 250% of the federal poverty level (FPL) for the coverage year.¹ For 2026, FPL is $15,960 for a single person and $33,000 for a family of four.² At 250%, the ceiling is roughly $39,900 for one person and $82,500 for a family of four.

The second rule catches people. You have to enroll in a Silver plan. Bronze, Gold, and Platinum do not carry these reductions no matter how low your income is.³ Picking Bronze for the cheaper premium often costs more overall once you compare the Silver variant’s reduced deductible and copays.

If your income is below 100% of FPL, you generally won’t qualify for a reduction or a premium tax credit through the Marketplace. In states that expanded Medicaid, you’d likely be eligible for Medicaid instead. In states that didn’t expand, people in that range can land in a coverage gap, earning too little for Marketplace savings but too much for their state’s Medicaid rules.²

Income is measured as Modified Adjusted Gross Income (MAGI). For most people that matches the adjusted gross income on line 11 of Form 1040.⁴ If you have untaxed foreign income, nontaxable Social Security benefits, or tax-exempt interest, add those back.⁵ The Marketplace uses what you expect to earn in the coverage year, not what last year’s return shows, so if your situation has changed, report the projection.

What the Reductions Actually Change

A standard Silver plan is built to cover about 70% of average medical costs. Cost sharing reductions raise that figure, called the actuarial value, to 73%, 87%, or 94% depending on income.⁶ The higher the value, the less you pay when you use care. The premium itself doesn’t go up to pay for it.

The savings show up in every line item on the plan. The annual deductible drops, sometimes to a few hundred dollars or zero. Copays for office visits can fall from something like $40 on a standard Silver plan down to $5 or $0 on the richest variant. Coinsurance percentages shrink too.

The out-of-pocket maximum, which caps your spending on covered care for the year, comes down with it. For 2026, the standard marketplace cap is $10,600 for individual coverage. With a reduction applied, it can fall to $3,500 for the two lowest income tiers or $8,450 near the top of the eligibility range. Once you hit the reduced cap, the plan pays 100% of covered services for the rest of the year.⁷

The Three Tiers by Income

Which variant you get depends on where your income falls inside the eligible range.⁶

100% to 150% FPL — 94% actuarial value. For a single person in 2026, roughly $15,960 to $23,940. The plan covers 94% of average costs, with an individual out-of-pocket cap of $3,500. Deductibles are minimal or eliminated, and routine copays are very low.
150% to 200% FPL — 87% actuarial value. For a single person, roughly $23,940 to $31,920. Coverage runs at 87%, with the same $3,500 individual out-of-pocket cap. Deductibles and copays still come down meaningfully versus a standard Silver plan.
200% to 250% FPL — 73% actuarial value. For a single person, roughly $31,920 to $39,900. The improvement is smaller. The individual out-of-pocket cap is $8,450, and copays and deductibles improve less than in the richer tiers.

The gap between the top tier and the bottom tier is large. Someone at 140% FPL may pay almost nothing at an appointment, while someone at 240% FPL still faces real costs. If your income sits near one of these cutoffs, a small change can shift you between tiers, so report what you actually expect to earn.

How to Enroll and See the Reduction

Sign up through HealthCare.gov or your state’s exchange during Open Enrollment, which typically runs November 1 through January 15.⁸ Outside that window you need a qualifying life event, such as losing other coverage, getting married, having a child, or moving.

After you enter your income and household information, the Marketplace issues an Eligibility Notice before you pick a plan.⁹ If it says you qualify for lower copays, deductibles, and coinsurance, filter to Silver plans and look for ones flagged with “extra savings” or similar wording.³ The deductibles and out-of-pocket limits shown on those plans already reflect your discount. Once you enroll, the insurer gets the reduction details electronically and applies them before coverage starts.

You may be asked to verify your income. A recent tax return, W-2, or recent pay stubs will usually do it.¹⁰ If your pay has changed since last year’s return, send documents that reflect what you earn now.

Different Rules for Tribal Members

Members of federally recognized tribes and Alaska Native Claims Settlement Act Corporation shareholders have broader access. The reductions aren’t restricted to Silver plans for them — they can be received on any metal tier.¹ Tribal members with income between 100% and 300% of FPL can enroll in a zero cost sharing plan with no deductibles, copays, or coinsurance. Those above or below that band qualify for a limited cost sharing plan, which removes cost sharing for care received through Indian health providers.¹¹

Keeping the Reductions in Place

Cost sharing reductions themselves are not reconciled at tax time. If your income ends up higher than you estimated and you received a richer variant than your final income warranted, you don’t owe the difference back. The benefits you used during the year stand.

There’s a catch, though. Almost everyone who qualifies for a reduction also receives the advance premium tax credit, and that credit does get reconciled on Form 8962 with your tax return. Skip Form 8962 and the IRS flags your account, which costs you eligibility for both the premium tax credit and the cost sharing reduction the following year.¹² You’ll need Form 1095-A from your Marketplace to complete it; it arrives by late January.

Report income, household, or address changes to the Marketplace as soon as they happen.¹³ Income shifts can move you between tiers mid-year and can also change your premium tax credit, which affects what you owe or get back at reconciliation.¹⁴ Renew actively each Open Enrollment rather than letting the application roll over untouched. Starting with the 2028 plan year, the Marketplace will require all enrollees to return and verify their information during the renewal window, and anyone who doesn’t will lose both the premium tax credit and the cost sharing reduction until they do.¹⁵

1
CMS: Agent and Brokers FAQ. What Are Cost-Sharing Reductions (CSRs) and How Can Consumers Qualify?
2
HealthCare.gov. Federal Poverty Level (FPL) – Glossary
3
HealthCare.gov. Cost-Sharing Reductions
4
Internal Revenue Service. Adjusted Gross Income
5
HealthCare.gov. Modified Adjusted Gross Income (MAGI) – Glossary
6
CMS. Actuarial Value and Cost-Sharing Reductions Bulletin
7
HealthCare.gov. Cost Sharing Reduction (CSR) – Glossary
8
HealthCare.gov. When Can You Get Health Insurance?
9
CMS. Application Walkthrough – Helping Consumers Understand the Eligibility Notice
10
HealthCare.gov. Health Plan Required Documents and Deadlines
11
Centers for Medicare and Medicaid Services. Working with American Indians and Alaska Natives – Information and Tips for Agents and Brokers
12
Internal Revenue Service. Reconciling Your Advance Payments of the Premium Tax Credit
13
HealthCare.gov. How to Report Income and Household Changes to the Marketplace
14
Internal Revenue Service. Premium Tax Credit – Claiming the Credit and Reconciling Advance Credit Payments
15
Office of the Law Revision Counsel. 42 USC 18071 – Reduced Cost-Sharing for Individuals Enrolling in Qualified Health Plans