Entity Solutions

Forming an entity can save active traders significant taxes.

Most traders eligible for trader tax status (TTS) begin as sole proprietors—unincorporated businesses. They deduct trading-business expenses on Schedule C without needing a separate entity.

An entity does not create TTS. The trading activity conducted within the entity must independently qualify as a trading business based on its volume, frequency, continuity, holding periods, and other facts and circumstances.

Existing calendar-year individual TTS traders generally had to elect Section 475 mark-to-market (MTM) accounting for 2026 by April 15, 2026. A valid election exempts securities covered by the election from wash-sale loss adjustments and the $3,000 capital-loss limitation.

Net Section 475 ordinary income may qualify for the 20% qualified business income (QBI) deduction. However, a trading business is generally a specified service trade or business (SSTB), so the deduction is limited or eliminated for taxpayers above the applicable taxable-income thresholds. The One Big Beautiful Bill Act (OBBBA) made the Section 199A deduction permanent.

Without Section 475, trading expenses can reduce QBI, while capital gains, interest, and dividends generally do not generate QBI.

If its trading activity qualifies for TTS, a pass-through entity—including a partnership or S-Corp—can offer several additional tax-saving strategies.

S-Corps Unlock Employee Benefits

A profitable TTS S-Corp can pay officer compensation through payroll, thereby creating the earned income needed for health insurance deductions and retirement plan contributions.

Trading gains generally are not self-employment income, so trading gains alone do not create earned income for a sole proprietor or partner. Partners also cannot receive W-2 wages from their partnership.

Officer compensation creates earned income for employee benefits, but it is subject to payroll taxes and reduces S-Corp pass-through income and potential QBI. Traders should model the income-tax savings, payroll-tax costs, retirement contributions, health-insurance deduction, potential Social Security benefits, and QBI deduction together.

Generally, the preferred retirement plan for a profitable trader is a Solo 401(k) sponsored by a TTS S-Corp. For 2026, the employee elective deferral limit is $24,500, and the overall defined contribution limit is $72,000 before catch-up contributions, assuming sufficient officer compensation.

The regular catch-up contribution for participants age 50 or older is $8,000 for 2026. Participants attaining ages 60 through 63 may qualify for an enhanced $11,250 catch-up contribution.

Beginning in 2026, catch-up contributions generally must be made to a Roth account when the participant received more than $150,000 in prior-year FICA wages from the S-Corp sponsoring the plan. Plan documents and providers must support the applicable Roth features.

The SALT Cap Workaround

About 3 dozen states offer some form of pass-through entity tax (PTET) election, also known as the SALT cap workaround, for partnerships and S-Corps.

OBBBA increased the individual SALT deduction cap to $40,000 for 2025 and $40,400 for 2026, subject to a phaseout for higher-income taxpayers. The cap is scheduled to return to $10,000 in 2030. Even with the temporarily higher cap, a PTET election can remain beneficial.

Under a PTET election, the partnership or S-Corp generally pays qualifying state income tax at the entity level and deducts the payment on its federal return. The state typically provides the owners with a corresponding credit or other adjustment on their individual state returns.

State eligibility, resident credits, addbacks, payment deadlines, election procedures, and owner-level treatment vary materially. Review the applicable rules early, as waiting until tax return preparation may be too late to make the election or payment for the desired year.

The PTET workaround is unavailable to a sole proprietorship filing Schedule C.

Ring-Fence Trading From Investments

S-Corps and partnerships can help ring-fence TTS and Section 475 activity at the entity level while the owner holds investment positions individually.

For example, a taxpayer might hold Apple stock as a personal investment while trading Apple options through a TTS entity using Section 475. Separate legal ownership, brokerage accounts, and books and records strengthen the distinction between short-term trading positions and investments, reducing potential IRS confusion.

Traders must still comply with Section 475’s investment-identification and segregation requirements.

Entity Tax Reporting

An entity return consolidates trading activity on a pass-through tax return—Form 1065 for a partnership or Form 1120-S for an S-Corp. The entity issues Schedule K-1s to its owners, and the tax character of each item generally passes through to their individual returns.

Partnerships and S-Corps may qualify for special summary reporting of capital transactions on Form 8949. Section 475 business trades follow different rules and are reported as ordinary gains or losses on Form 4797. The entity must maintain complete trade and tax-lot records under either method.

An entity may pass through capital gains that an owner can use against individual capital-loss carryovers. Alternatively, a valid Section 475 election allows the entity to pass through ordinary trading gains or losses.

Coordinate Section 475 With Capital-Loss Carryovers

Individual capital-loss carryovers are not lost when a trader forms a pass-through entity. They remain available on the owner’s Schedule D.

Section 475 ordinary income generally cannot absorb an owner’s individual capital-loss carryovers. A trader with significant carryovers may initially skip the entity’s Section 475 election so that entity capital gains can pass through and offset those losses. The entity may elect Section 475 for a subsequent tax year.

Traders should coordinate the timing of an entity’s Section 475 election with their existing capital-loss carryovers.

A New Entity Can Make a Later Section 475 Election

A newly formed entity may provide another opportunity to elect Section 475 later in the tax year if the trader missed the individual election deadline.

A newly formed entity that is a new taxpayer and adopts Section 475 from inception generally makes an internal election no later than two months and 15 days after the first day of its election year—commonly described as within 75 days of inception.

The entity should retain reliable, date-stamped evidence that it made the internal election on time and attach a copy of the election statement to its original federal income tax return for the election year.

When this is the first tax year in which the entity owns securities, it generally does not file Form 3115 because it has no prior inconsistent accounting method. An existing taxpayer changing its accounting method generally follows different election procedures and files Form 3115.

Forming an entity does not retroactively cure a missed Section 475 election for trading previously conducted individually.

Do Not Form Too Late to Establish TTS

We prefer that traders form the entity and begin trading no later than October 1, allowing it to report at least one full calendar quarter of qualifying TTS activity.

The IRS does not have a bright-line one-quarter rule; TTS remains a facts-and-circumstances determination. Nevertheless, an entity with less than a full quarter of substantial, continuous, and regular trading activity may have difficulty establishing TTS.

If trading cannot begin by October 1, consider forming the entity to begin trading on January 1 of the following year.

Consider the Costs

Entities create additional costs and responsibilities, including:

A separate federal and state tax return
Payroll administration for an S-Corp
Retirement-plan and health-insurance reporting
State filing fees, franchise taxes, gross-receipts taxes, or minimum taxes
More formal accounting, recordkeeping, and operating procedures

Forming an entity in Delaware, Nevada, or another state generally does not eliminate filing and tax obligations in the state where the trader lives and conducts business.

For many profitable traders, an S-Corp offers the broadest package of potential benefits: employee benefits, PTET savings, Section 475 flexibility, and separation between trading and investing. A partnership may work well when the owners want TTS, Section 475, ring-fencing, and PTET but do not need S-Corp employee benefits.

A sole proprietorship may remain the best choice when the additional benefits do not justify a separate return, payroll, state taxes, and administrative complexity.

Before forming an entity, traders should assess TTS, review capital-loss carryovers, model payroll and QBI, confirm state PTET rules, estimate entity taxes and compliance costs, and plan the Section 475 election calendar.

For comprehensive coverage, see Chapter 7, “Entity Solutions,” and Chapter 8, “Retirement Plans,” in Green’s 2026 Trader Tax Guide.

Read the Detailed Analysis

For current rules, calculations, reporting requirements, and additional planning considerations, see:

Entity Solutions for Active Traders: Tax Benefits, S-Corps, and Section 475