Net Investment Income Tax (NIIT) for Freelancers: Form 8960 Explained (2026)

Published: July 14, 2026 · Reading time: 8 min

TL;DR: The 3.8% Net Investment Income Tax applies to investment income — interest, dividends, capital gains, rental income — not your Schedule C profit, which is earned income exempt from NIIT. It kicks in once your MAGI tops $200,000 (single) or $250,000 (married filing jointly), thresholds that are not inflation-adjusted. The twist for successful freelancers: a big Schedule C profit can push your MAGI over the line, making your smaller pile of investment income taxable. You report it on Form 8960. See self-employment tax explained and the Additional Medicare Tax.

There are two 3.8%-ish surtaxes in the code, and freelancers constantly confuse them. One — the 0.9% Additional Medicare Tax — hits your earned freelance income above the thresholds. The other — the 3.8% Net Investment Income Tax — hits your investment income above the same thresholds. They are siblings from the same 2013 law, aimed at high earners, but they tax completely different dollars. This guide is about the second one, and the most important thing to understand up front is that your Schedule C profit is not subject to it.

What the NIIT is — and is not

The Net Investment Income Tax (NIIT), created by Internal Revenue Code §1411, is a 3.8% tax on net investment income for higher-income taxpayers. It is not a tax on your business. It exists to apply a Medicare-style levy to passive, unearned income the way payroll and self-employment taxes apply to earned income.

For a freelancer, the headline is simple: the money you make actively running your business is exempt. Your Schedule C net profit is earned self-employment income, and the statute explicitly carves self-employment income out of net investment income. That profit is already carrying self-employment tax and, above the thresholds, the 0.9% Additional Medicare Tax. It does not also get hit by NIIT.

The two-part test

The NIIT never applies to your whole investment income. It applies to the lesser of two numbers:

1. Your net investment income, or
2. The amount your modified adjusted gross income (MAGI) exceeds the threshold.

Then it charges 3.8% on that smaller figure. Both conditions must be met — you need investment income and MAGI over the threshold.

The 2026 thresholds

These are fixed by law and not indexed for inflation, so each year a few more taxpayers cross them as incomes rise. For most freelancers, MAGI is close to their AGI — Schedule C profit minus the deductible half of SE tax, retirement contributions, and the self-employed health insurance deduction, plus investment income.

What counts as net investment income

Included:

• Taxable interest and dividends
• Capital gains — selling stocks, funds, crypto, or a second home
• Rental and royalty income
• Non-qualified annuity income
• Income from a business in which you do not materially participate (a passive investment) and from trading financial instruments or commodities

Excluded:

• Wages and self-employment income from a business you actively run
• Social Security benefits
• Tax-exempt municipal bond interest
• Distributions from IRAs and qualified retirement plans (though they raise MAGI)
• Gain on the sale of an active interest in a business you materially participate in

You then subtract allocable deductions — investment interest expense, investment advisory and brokerage fees, and rental expenses — to get from gross to net investment income.

The freelancer twist: how profit you don't pay NIIT on can still trigger it

Here is the nuance that catches successful freelancers. The tax works in two layers, and your Schedule C profit lives in the first one:

1. The gate — MAGI over the threshold. Your freelance profit counts toward MAGI. A strong year can push you past $200,000 or $250,000.
2. The base — the lesser figure. Once you are through the gate, the 3.8% applies to the smaller of your net investment income or your MAGI excess.

So imagine a single freelancer with a $240,000 Schedule C profit and $15,000 of dividends and capital gains. The business profit is never taxed by NIIT. But it drives MAGI to roughly $255,000 — about $55,000 over the $200,000 threshold. The tax applies to the lesser of the $15,000 investment income or the $55,000 excess, so $15,000 × 3.8% = $570 of NIIT. The freelance income was the reason the investment income became taxable, even though it escaped the tax itself.

Worked example

NIIT vs. the Additional Medicare Tax — don't mix them up

If your income is entirely from freelancing with no investments, you may owe the Additional Medicare Tax but not the NIIT. If you have a healthy brokerage account or rental property on top of your freelance income, you may owe both. See the Additional Medicare Tax guide for the earned-income side.

How to plan around it

You cannot deduct your way out of a 3.8% surtax entirely, but you can shrink the base or stay under the gate:

• Lower your MAGI with retirement contributions. A SEP-IRA or Solo 401(k) contribution reduces AGI and can pull you below the threshold — this is one of the most powerful moves available to a high-earning freelancer. See year-end tax moves.
• Harvest capital losses to offset gains and reduce net investment income.
• Hold tax-exempt municipal bonds, whose interest is excluded from both MAGI (mostly) and net investment income.
• Time large gains so a one-off sale doesn't stack on a high-profit freelance year.
• Max the self-employed health insurance deduction and the QBI deduction, both of which lower MAGI.

How you report it: Form 8960

You compute the tax on Form 8960, Net Investment Income Tax, filed with your 1040. The form totals your investment income, subtracts allocable deductions, computes MAGI, and applies 3.8% to the lesser of net investment income or the MAGI excess. The result flows to Schedule 2 and onto your 1040. If your MAGI is under the threshold, you generally do not file Form 8960 at all. Because it interacts with retirement contributions, the QBI deduction, and estimated taxes, it is worth modeling before year-end rather than discovering it in April — see how much to set aside for taxes.

Frequently Asked Questions

Do freelancers pay the Net Investment Income Tax on their Schedule C profit?

No. Your Schedule C net profit is earned self-employment income, which is specifically excluded from the NIIT. It is instead subject to self-employment tax and, above the thresholds, the 0.9% Additional Medicare Tax. The 3.8% NIIT applies only to investment income — interest, dividends, capital gains, rental income, and passive-business income. A freelancer with a $300,000 profit and no investments owes no NIIT.

What counts as net investment income for the 3.8% tax?

Generally taxable interest, dividends, capital gains (including from selling stocks, funds, or a second home), rental and royalty income, non-qualified annuity income, and income from a business you do not materially participate in. It excludes wages, self-employment income from a business you actively run, Social Security, tax-exempt municipal interest, and retirement-plan distributions. Subtract related expenses to reach net investment income.

What are the NIIT income thresholds and are they adjusted for inflation?

$250,000 for married filing jointly, $125,000 for married filing separately, and $200,000 for single or head of household — based on MAGI. They are set by statute and NOT indexed for inflation, so more taxpayers cross them each year. The 3.8% applies to the lesser of your net investment income or the amount your MAGI exceeds the threshold.

How can a high Schedule C profit trigger NIIT even though it's exempt?

Because the tax has two layers. First your MAGI must exceed the threshold — and Schedule C profit counts toward MAGI. Second, the tax applies to the lesser of your net investment income or your MAGI over the threshold. A large freelance profit can push MAGI over the line, making your smaller amount of investment income the base taxed at 3.8%. The freelance income is never taxed by NIIT itself.

Which form reports the Net Investment Income Tax?

Form 8960, filed with your 1040. It totals investment income, subtracts allocable deductions, computes MAGI, and applies 3.8% to the lesser of net investment income or the MAGI excess. The tax carries to Schedule 2 and onto the 1040. If your MAGI is below the threshold, you generally do not file Form 8960.

Authoritative References

• IRS — Questions and Answers on the Net Investment Income Tax
• IRS — About Form 8960, Net Investment Income Tax
• IRS — Topic No. 559, Net Investment Income Tax
• IRS — About Form 8959, Additional Medicare Tax
• IRS — Self-Employment Tax (Social Security and Medicare Taxes)

Know your real tax picture before year-end

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This article is educational and not tax or financial advice. NIIT interacts with your full return — consult a qualified tax professional about your specific situation.