Title 26 › Subtitle A — Income Taxes › CHAPTER 2A — UNEARNED INCOME MEDICARE CONTRIBUTION › § 1411
You must pay an extra 3.8% tax if you have enough investment income and your income is above a certain amount. For people, the tax is 3.8% of the smaller of (1) your net investment income for the year, or (2) the part of your modified adjusted gross income that is over the threshold. For estates and trusts, the tax is 3.8% of the smaller of undistributed net investment income or the amount their adjusted gross income is over the top tax-bracket threshold. The threshold is $250,000 for married couples filing jointly or qualifying surviving spouses, $125,000 for married people filing separately, and $200,000 for everyone else. Net investment income means things like interest, dividends, annuities, royalties, rents, capital gains, and some business income from passive activities or trading in financial instruments, after subtracting related deductions. It does not include distributions from qualified retirement plans or income that is counted as self-employment income for which the self-employment tax applies. There are special rules for selling partnership or S‑corporation interests and for working-capital investments. The tax does not apply to nonresident aliens or certain charitable trusts.
Full Legal Text
Internal Revenue Code, Source: USLM XML via OLRC
Legislative History
Reference
Citation
26 U.S.C. § 1411
Title 26, Internal Revenue Code
Last Updated
Sep 22, 2026
Release point: 119-110