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Form 8960: net investment income tax

Form 8960 computes the net investment income tax, and its instructions cover income, filing thresholds, related forms, attachments and filing timing.

What Form 8960 calculates

Form 8960 calculates net investment income tax, abbreviated NIIT. The IRS attachment instruction applies when modified adjusted gross income, or MAGI, exceeds the applicable threshold.[1][2]

For individuals, NIIT is a 3.8% tax on the lesser of net investment income or the amount by which MAGI exceeds the filing-status threshold.[2]

Who the instructions cover

The individual thresholds depend on filing status. These thresholds apply to U.S. citizens and residents.[2]

  • Joint filers and qualifying surviving spouses have a $250,000 threshold.[2]
  • Separate married filers have a $125,000 threshold.[2]
  • Single filers and heads of household have a $200,000 threshold.[2]

Domestic estates and trusts fall within NIIT when they have undistributed net investment income and AGI above their threshold. Their threshold follows the starting point of the highest estate and trust income tax bracket, with Form 1041 instructions supplying the amount.[2]

What net investment income means

Net investment income generally covers interest, dividends, annuities, royalties and rents, subject to the instructions' business-income exceptions. It also includes income from passive businesses or businesses trading financial instruments or commodities, and certain net gains on property dispositions.[2]

The ordinary-business exception depends on the business being nonpassive and outside financial-instrument or commodity trading. Permitted income tax deductions properly allocated to the included income or gains reduce the net investment income calculation.[2]

A passive business activity includes one in which the taxpayer does not materially participate. Rental activities generally count as passive regardless of participation, with limited exceptions.[2]

Income included in the self-employment income calculation subject to section 1401(b) falls outside NII. Income excepted from self-employment income can still enter NII when it otherwise meets the investment-income definition.[2]

What information the calculation uses

The instructions start the interest and dividend entries with amounts from the income tax return. Line 1 covers taxable interest, while line 2 covers ordinary dividends.[2]

For annuities, Form 1099-R can contain both amounts within NIIT and retirement-plan payments outside it. Code D in box 7 identifies amounts subject to NIIT; the instructions use the taxable amount in box 2a, with a calculation potentially needed when box 2b indicates an undetermined taxable amount.[2]

MAGI equals the AGI reported on Form 1040 or 1040-SR when there is no section 911 exclusion and no interest in a controlled foreign corporation or passive foreign investment company. Those exclusions or interests can require modifications under the instructions.[2]

Investment interest on line 9a connects to Schedule A for individuals and Form 4952 for estates and trusts. Interest already included through Schedule E on line 4a is excluded from a second entry on line 9a.[2]

Attachments, records and filing timing

Form 8960 is attached to the return when MAGI exceeds the applicable threshold. For individuals using Form 1040 or 1040-SR, the calculated tax transfers to Schedule 2, line 12.[2]

The section 1.1411-10(g) election has a checkbox and an accompanying statement identifying the taxpayer and each relevant CFC or QEF. The statement separately identifies companies covered by an election made with that return.[2]

The partnership-interest and S corporation stock disposition instructions call for a statement with the disposition-year return. It identifies the entity and reports the regular income tax gain or loss, information provided by the entity, and applicable basis-related adjustments.[2]

Questions and answers

Does a joint return with a nonresident spouse determine NIIT treatment?

A separate election applies the section 6013(g) or 6013(h) joint-return treatment to NIIT. Without that NIIT election, the U.S. citizen or resident spouse uses separate calculations and the $125,000 threshold.[2]

When does the spouse election apply?

The instructions place the NIIT spouse election in the first tax year when the U.S. taxpayer is subject to NIIT. Making it involves combined income items, the joint threshold and the corresponding checkbox.[2]

How do foreign trust distributions enter the calculation?

A U.S. person's income distribution generally enters NII to the extent included in regular income tax AGI. The instructions exclude distributions of accumulated income from a foreign trust from that inclusion.[2]

Where does an estate or trust report its calculated NIIT?

For Form 1041 filers, the amount goes to Schedule G, line 5. For Form 1041-QFT filers, it goes to line 15.[2]

Sources and data notes
  1. Internal Revenue Service, About Form 8960. https://www.irs.gov/forms-pubs/about-form-8960. Retrieved .
  2. Internal Revenue Service, Instructions for Form 8960. https://www.irs.gov/instructions/i8960. Retrieved .

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