An official website of the United States government
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Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock () or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
Notice: During the government shutdown, continue using your 2025 health insurance plan and providers. Use this site to apply for and enroll in 2026 coverage during Marketplace Open Enrollment.
A tax under the Federal Insurance Contributions Act (FICA) that is a United States payroll tax imposed by the federal government on both employees and employers to fund Medicare.