Some taxpayers may be liable for an Additional Medicare Tax if your income exceeds certain limits. Here are six things that you should know about this tax:

  • Tax Rate. The Additional Medicare Tax rate is 0.9 percent.
  • Income Subject to Tax. The tax applies to the amount of certain income that is more than a threshold amount. The types of income include your Medicare wages, self-employment income and railroad retirement (RRTA) compensation. You must combine your wages and self-employment income to figure the tax. You do not consider a loss from self-employment purposes of this tax. You compare RRTA compensation separately to the threshold. See the instructions for Form 8959, Additional Medicare Tax, for more on these rules.
  • Threshold Amount. You base your threshold amount on your filing status. If you are married and file a joint return, you must combine your spouse's wages, compensation, or self-employment income with yours. Use the combined total to determine if your income exceeds your threshold. The threshold amounts are:
  • Filing Status Threshold Amount
    Married filing jointly $250,000
    Married filing separately $125,000
    Single $200,000
    Head of household $200,000
    Qualifying widow(er) with dependent child $200,000
  • Withholding / Estimated Tax. Employers must withhold this tax from your wages or compensation when they pay you more than $200,000 in a calendar year. If you are self-employed you should include this tax when you figure your estimated tax liability.
  • Underpayment of Estimated Tax. If you had too little tax withheld, or did not pay enough estimated tax, you may owe an estimated tax penalty. For more on this topic, see Publication 505, Tax Withholding and Estimated Tax.

If you owe this tax, file Form 8959, with your tax return. You also report any Additional Medicare Tax withheld by your employer on Form 8959. Visit IRS.gov for more on this topic.

Additional IRS Resources:

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Upcoming Tax Dates

June 10 — Communications and air transportation taxes under the alternative method.
Deposit the tax included in amounts billed or tickets sold during the first 15 days of May.

June 12 — Employees who work for tips
If you received $20 or more in tips during May, report them to your employer Details

June 14 — Regular method taxes
Deposit the tax for the last 16 days of May.

June 15 — Individuals
If you are a U.S. citizen or resident alien living and working (or on military duty) outside the United States and Puerto Rico, file Form 1040 and pay any tax, interest, and penalties due. If you want additional time to file your return, file Form 4868 to obtain 4 additional months to file Details

June 15 — Individuals
Make a payment of your 2017 estimated tax if you are not paying your income tax for the year through withholding (or will not pay in enough tax that way). Use Form 1040-ES. This is the second installment Details

June 15 — Corporations
Deposit the second installment of estimated income tax for 2017 Details

June 15 — Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in May

June 15 — Nonpayroll withholding
If the monthly deposit rule applies, deposit the tax for payments in May.

June 27 — Communications and air transportation taxes under the alternative method.
Deposit the tax included in amounts billed or tickets sold during the first 16 days of May.

June 29 — Regular method taxes
Deposit the tax for the first 15 days of June.

June 30 — Wagering tax
File Form 730 and pay the tax on wagers accepted during May.

June 30 — Floor stocks tax for ozone depleting chemicals
(IRS No. 20). Deposit the tax for January 1, 2017.

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