Glossary term

Cost-Sharing Reductions (CSR)

Cost-sharing reductions lower deductibles, copayments, coinsurance, or out-of-pocket limits for eligible Marketplace enrollees in Silver plans.

Updated

May 17, 2026

Read time

2 min read

What Are Cost-Sharing Reductions?

Cost-sharing reductions, or CSR, are Affordable Care Act savings that lower out-of-pocket costs for eligible Marketplace health insurance enrollees. They can reduce deductibles, copayments, coinsurance, and out-of-pocket maximums.

CSR is different from the premium tax credit. Premium tax credits lower monthly premiums. Cost-sharing reductions lower costs when covered care is used.

Key Takeaways

  • CSR lowers out-of-pocket costs, not the monthly premium itself.
  • Eligible enrollees generally must choose a Silver Marketplace plan to receive CSR benefits.
  • CSR can make deductibles, copays, coinsurance, and out-of-pocket maximums lower.
  • Eligibility depends on income, household, and Marketplace rules.

How CSR Changes Plan Design

When a person qualifies and enrolls in an eligible Silver plan, the plan may have lower cost sharing than a standard Silver plan. The insurer builds the reduction into the plan design, so the member pays less at the point of care.

Cost Item

How CSR Can Help

Deductible

May lower the amount paid before certain benefits begin.

Copayment

May reduce fixed amounts for visits or prescriptions.

Coinsurance

May reduce the percentage paid for covered services.

Out-of-pocket maximum

May lower the annual cap on covered in-network cost sharing.

Premium Savings vs. Care-Cost Savings

A person can qualify for premium tax credits without receiving strong CSR benefits. The two subsidies answer different affordability problems. Premium credits help pay for coverage each month. CSR helps reduce the cost of using care.

This is why a Silver plan can sometimes be financially stronger than a cheaper-looking Bronze plan for an eligible person who expects to use medical care. The premium is only one part of health insurance cost.

What to Check During Enrollment

Marketplace plan listings usually show whether extra savings are included. Eligibility and plan design can change with income, household size, location, and plan year. Current-year details should be checked through the Marketplace application.

The Bottom Line

Cost-sharing reductions make covered care less expensive for eligible Marketplace enrollees. The savings matter most when comparing the total cost of a plan, not just the monthly premium.

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