What Is the Additional Medicare Tax?
The Additional Medicare Tax is a 0.9% US tax on wages and self-employment income above certain thresholds: 200,000 for single filers, 250,000 for married couples filing jointly, and 125,000 for married filing separately. It is paid only by the employee or self-employed person; there is no employer match.
How It Works
Employers must begin withholding the extra 0.9% once an employee's wages from that employer exceed 200,000 in a year. Because thresholds depend on filing status, the final amount is settled on the tax return.
Fixed Thresholds
Unlike many tax figures, these thresholds are set in law and are not adjusted for inflation.
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🔗 Related Terms
More Taxes Terms
- Adjusted Gross Income (AGI)
- Alternative Minimum Tax (AMT)
- Capital Gains Tax
- Capital Loss
- Child Tax Credit
- Cost Basis
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Last updated: September 27, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.