Options Trading NIIT in 2026: Form 8960 Guide

Direct answer and the two-part test

Options trading NIIT in 2026 is not a separate tax on every premium. The 3.8% Net Investment Income Tax applies only when a taxpayer has positive net investment income and modified adjusted gross income above the statutory threshold. Form 8960 compares those two amounts and taxes the smaller one.

That distinction explains why two traders with the same option profit can owe different NIIT. Wages, taxable retirement distributions, business income, interest, and other items can increase MAGI, while only specified investment and passive categories enter NII. Filing status and the entire return matter; the brokerage statement alone cannot answer the question.

2026 NIIT thresholds and formula

The compact formula is NIIT = 0.038 × min(net investment income, max(0, MAGI − threshold)). The result cannot be less than zero. These thresholds are fixed by statute rather than adjusted each year, so a 2026 inflation adjustment should not be added. Estates and trusts use a different threshold and need their own Form 8960 analysis.

Worked single-filer and joint-filer examples

Example one: a single filer has US$190,000 of wages and US$30,000 of net taxable option gain, with no other Form 8960 adjustments. Simplified MAGI is US$220,000, threshold excess is US$20,000, and NII is US$30,000. The lesser amount is US$20,000, producing US$760 of NIIT. The regular income tax on the option gain is separate.

Example two: a married couple filing jointly has US$260,000 of wages and US$8,000 of net option gain. Simplified MAGI is US$268,000, or US$18,000 above the joint threshold. NII is only US$8,000, so the lesser amount is US$8,000 and NIIT is US$304. The tax is not 3.8% of all US$268,000.

How common option results enter the calculation

For a typical investor, gain from selling or expiring a written equity option is generally short-term. Exercise generally changes the stock purchase basis or sale proceeds instead of remaining a separate premium line. Long-option sales and expirations create capital results based on cost, proceeds, and holding period. Those taxable net gains feed the disposition portion of Form 8960.

Section 1256 contracts are marked to market and generally receive a 60% long-term and 40% short-term character split. The blend can reduce regular federal tax compared with an equally profitable short-term equity option, but the net gain is not thereby excluded from NIIT. Classification comes before calculation: an ETF option and an index option with similar notional exposure can report differently.

Gross premium is not net investment income

A trader who collects US$100,000 of premium and spends US$92,000 closing positions did not create US$100,000 of NII. Conversely, unrealized brokerage losses do not automatically offset realized taxable gains. Reconcile each contract through close, expiration, exercise, or year-end treatment, then connect the tax forms to Form 8960.

• Opening premium received is not the final gain when the option remains open.
• A buy-to-close cost reduces or reverses the written-option result.
• Exercise can move premium into stock basis or proceeds.
• Allowable capital losses and carryovers follow capital-loss rules.
• Wash-sale, straddle, constructive-sale, and related-party rules can defer or alter losses.
• Investment expenses are deductible for NIIT only when the Form 8960 rules allow them.

Trader status, Section 475, and entities

Trader tax status is a facts-and-circumstances classification; Section 475 mark-to-market is a separate timely election. Neither label automatically switches off NIIT. The statute and Form 8960 instructions specifically address a trade or business of trading financial instruments or commodities, including disposition income and allocable deductions.

An S corporation, partnership, trust, retirement account, or disregarded entity can change where information appears and who performs the computation. Self-employment tax and NIIT are also separate regimes. If trades run through an entity or a trader claims business expenses, use the current Form 8960 instructions and professional advice instead of applying the individual investor example mechanically.

Income that raises MAGI without being NII

Wages and active-business compensation generally are not net investment income, yet they can push MAGI above the threshold and expose option income to NIIT. Taxable retirement-plan distributions are generally excluded from NII but can increase MAGI. Tax-exempt municipal-bond interest is generally excluded from both regular MAGI and NII, subject to the form's specific modifications.

This asymmetry makes timing important. A Roth conversion, bonus, business sale, large required distribution, or capital gain elsewhere can change the lesser-of test even when the option account is unchanged. NIIT planning therefore belongs in a household tax projection, not just a strategy return spreadsheet.

Form 8960 and estimated-tax workflow

NIIT is subject to estimated-tax provisions. A profitable late-year expiration can raise both regular tax and NIIT after earlier quarterly payments were set. Update the annual projection when a large position closes, and preserve the worksheet supporting each number rather than relying on an account-level realized-gain total.

The regular-tax estimated-payment safe harbors can protect against an underpayment penalty even when the final balance is large, but they do not reduce the tax itself. Withholding is generally treated as paid evenly through the year, while estimated payments follow payment dates. A taxpayer with a late option windfall may compare additional wage or pension withholding with the next estimated payment under professional guidance.

Use the actual Form 8960 line sequence for the final return. The simplified examples omit foreign earned income modifications, controlled foreign corporation and passive foreign investment company elections, disposition adjustments, investment-interest limitations, and estate or trust allocations. Those items can change MAGI, NII, or both without appearing in an options export.

NIIT is added after the regular income-tax calculation; it does not convert short-term option gain into a different character or replace capital-gain rates. Keep a separate line for regular federal tax, NIIT, state tax, and payment timing so the 3.8% estimate is neither omitted nor counted twice.

1. Export realized option activity and separate equity, ETF, and Section 1256 contracts.
2. Reconcile Forms 1099-B, 8949, Schedule D, and 6781 before estimating NII.
3. Project filing status, wages, retirement income, business income, and other MAGI items.
4. Apply allowable investment deductions and loss limitations under Form 8960 instructions.
5. Run the lesser-of calculation and add NIIT to regular federal tax.
6. Review withholding, quarterly safe harbors, due dates, and state obligations after large gains.