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:

April 2018
S M T W T F S
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30

Upcoming Tax Dates

April 10 — Employees who work for tips
If you received $20 or more in tips during March, report them to your employer. You can use Form 4070.

April 15 — Individuals *2017 Filing Deadline: 04-17, 2018*
File a 2017 income tax return (Form 1040, 1040A, or 1040EZ) and pay any tax due. If you want an automatic 6 month extension of time to file the return, file Form 4868, Application for Automatic Extension of Time To File U.S. Individual Income Tax Return. For more information, see Form 4868. Then, file Form 1040, 1040A, or 1040EZ by 10-15.

April 15 — Corporations *2017 Filing Deadline: 04-17, 2018*
File a 2017 calendar year income tax return (Form 1120) and pay any tax due. Details

April 15 — Individuals
If you are not paying your 2018 income tax through withholding (or will not pay in enough tax during the year that way), pay the first installment of your 2018 estimated tax. Use Form 1040ES.

April 15 — Household Employers
If you paid cash wages of $2,000 or more in 2017 to a household employee, you must file Schedule H Details

April 15 — Corporations
Deposit the first installment of estimated income tax for 2017 Details

April 15 — Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in March.

April 15 — Household employers
If you paid cash wages of $$2,000 or more in 2017 to a household employee, you must file Schedule H (Form 1040). If you are required to file a federal income tax return (Form 1040), file Schedule H (Form 1040) with the return and report any household employment taxes. Report any federal unemployment (FUTA) tax on Schedule H (Form 1040) if you paid total cash wages of $1,000 or more in any calendar quarter of 2016 or 2017 to household employees. Also, report any income tax you withheld for your household employees.

April 30 — Social security, Medicare, and withheld income tax
File Form 941 for the first quarter of 2018. Deposit or pay any undeposited tax under the accuracy of deposit rules. If your tax liability is less than $2,500, you can pay it in full with a timely filed return. If you deposited the tax for the quarter timely, properly, and in full, you have until 05-10 to file the return.

April 30 — Federal unemployment tax.
Deposit the tax owed through 03-if more than $500.

View More Tax Dates