Missed the April 15 Mark-to-Market Election Deadline? Houston Day Traders Have a Second Path to §475 Treatment in 2026

April 15, 2026 came and went. If you trade securities actively for your own account and you weren't already operating under a §475(f) mark-to-market election, you're now stuck with the $3,000 capital loss limitation under §1211(b) and full wash sale rules under §1091 for the entire 2026 tax year, unless you take a specific structural step in the next several months. The path forward is forming a new trading entity and making the §475(f) election internally within 75 days of formation, which gives sophisticated Houston traders a second window for ordinary-loss treatment in 2026 even though the individual filing deadline has passed. The same structure unlocks a planning move most retail traders never consider: keeping long-term investment positions in your personal account, separately, where they retain capital gains treatment.

KEY TAKEAWAYS

• IRC §475(f) lets qualifying traders elect mark-to-market accounting, which converts capital gains and losses into ordinary income and loss and exempts the trader from wash sale rules under §1091.

• For individual taxpayers, the §475(f) election for the 2026 tax year had to be filed with the 2025 return or extension by April 15, 2026, meaning individual traders who missed the date cannot get §475 treatment for 2026 through the standard pathway.

• Newly-formed entities have 75 days from inception under Rev. Proc. 99-17 to make the §475(f) election internally. A trader who forms a new entity mid-year and trades through it from formation forward gets mark-to-market treatment for the entity's first taxable year.

• The entity structure also lets the trader hold long-term investment positions in their personal account, outside the entity, where they retain capital gains treatment without contaminating §475 status.

• The Excess Business Loss limitation under §461(l), made permanent and inflation-indexed by OBBBA, caps deductible business losses at $512,000 MFJ / $256,000 single for 2026, which can constrain the cash-flow benefit of large §475 losses.

•Trader status itself is a meaningful threshold question, with case law setting the bar substantially higher than most retail traders assume.

The Trader vs. Investor Threshold, A Higher Bar Than Most Traders Realize

Before any §475(f) analysis matters, the taxpayer has to qualify as a trader under federal tax law, and the bar is higher than most retail traders assume. The Internal Revenue Code does not define trader with statutory precision. The standard comes from a line of Tax Court and circuit court decisions interpreting what it means to be in the trade or business of trading securities for one's own account, and the courts have applied the test rigorously.

The leading case for the modern analysis is Endicott v. Commissioner, T.C. Memo. 2013-199, which articulates a three-part test. The taxpayer's trading must be substantial in dollar volume and transaction frequency. The trading must be conducted with continuity and regularity throughout the year. And the taxpayer must seek to profit from short-term swings in the market rather than from dividends, interest, or long-term capital appreciation. Each element is fact-intensive, and failure on any element defeats trader status.

Earlier cases set the floor on what does not qualify. In Estate of Yaeger v. Commissioner, 889 F.2d 29 (2d Cir. 1989), the Second Circuit held that a taxpayer who held positions for an average of several months and traded based on long-term investment thinking was an investor, not a trader, regardless of dollar volume. In Chen v. Commissioner, T.C. Memo. 2004-132, the Tax Court denied trader status to a taxpayer who made roughly 320 trades in a year because the activity was concentrated in three months and was not continuous and regular enough to satisfy the test. In Holsinger v. Commissioner, T.C. Memo. 2008-191, a taxpayer who made 372 trades in 2002 and 204 trades in 2003 was denied trader status on the same continuity ground.

The takeaway: trader status typically requires hundreds and often thousands of trades per year, spread continuously across most trading days throughout the year, with positions held for short periods (days, not months). A retail investor who makes 50 swing trades a year is not a trader, even if those trades are concentrated and active. A genuine day trader who trades daily, holds positions briefly, and treats trading as a business is a trader. The space in between is fact-intensive and the burden of proof sits with the taxpayer. Trade logs, broker statements, time-spent records, and contemporaneous documentation of the trading methodology all matter when the IRS challenges the position.

What §475(f) Mark-to-Market Election Does

Once trader status is established, §475(f) gives the trader an election to use mark-to-market accounting for trading positions. Four consequences flow from a valid election.

First, all securities held at year-end are treated as sold at fair market value on the last business day of the taxable year. Gains and losses are recognized whether or not the position has been closed. The deemed-sale-and-repurchase mechanic resets basis at year-end fair market value, so the next year starts with a clean slate at current values.

Second, the gains and losses are ordinary, not capital. The $3,000 annual capital loss limitation under §1211(b) does not apply. A trader with a $400,000 net loss can deduct the full amount against ordinary income, wages, business income from other activities, even a spouse's W-2 income on a joint return, subject to the Excess Business Loss limitation discussed below. Without the election, that same trader would deduct $3,000 against ordinary income and carry forward the remaining $397,000 indefinitely against future capital gains, with no relief against ordinary income.

Third, the wash sale rules under §1091 do not apply, per §475(d)(1). For high-frequency traders trading the same names repeatedly, this is transformational. Under standard rules, selling AAPL at a loss and buying it back within 30 days defers the loss until the replacement position is sold. A high-frequency trader who runs the same playbook on the same names accumulates massive wash sale disallowances, sometimes producing phantom income, where the trader has a tax bill on a year of net trading losses because the disallowed losses inflate taxable gains. With §475 elected, every loss is recognized when realized, no deferral, no disallowance.

Fourth, gains and losses are reported on Form 4797 Part II rather than Schedule D and Form 8949. This shifts the activity into the business-property reporting regime, which is consistent with the trader's general treatment as carrying on a trade or business. Trading expenses (data feeds, platform fees, Bloomberg subscriptions, home office, education) move to Schedule C as ordinary and necessary business expenses.

Why the April 15 Deadline Is Punishing for Individuals

For individual taxpayers, the §475(f) election for a given tax year must be filed with the previous year's tax return or extension request by April 15 of the current year. The election for tax year 2026 had to be attached to the 2025 return or extension and filed by April 15, 2026. The election statement itself is brief, essentially a declaration that the taxpayer elects under §475(f) to use the mark-to-market method of accounting for the tax year, but the timing rule is unforgiving.

The deadline structure means individual traders face a guess-the-future problem. To get §475 treatment for 2026, the trader had to make the call by April 15, 2026, based on their expected 2026 trading results, before they had any data from the actual 2026 trading year. For a trader who got off to a strong start in 2026 and didn't realize §475 made sense until April or May, the window has already closed for the standard individual pathway. The trader must wait until April 15, 2027 to make the election for tax year 2027, and trades all of 2026 under the standard capital gains regime, $3,000 loss cap, full wash sale exposure, capital gain rates on profits.

This is where the entity strategy becomes valuable.

The Entity Strategy Under Rev. Proc. 99-17, A Mid-Year Path to §475

Rev. Proc. 99-17 establishes that a newly-formed taxpayer has 75 days from the date of inception to make the §475(f) election internally. Because a new entity is, by definition, a new taxpayer, the entity's first taxable year begins at formation, and the 75-day window for the entity's election runs from formation rather than from any prior April 15. This is the structural answer for a trader who missed the individual deadline.

The structure works as follows. A trader who missed the individual April 15, 2026 deadline forms a new trading entity in May, June, or July 2026. The entity files an internal election statement under Rev. Proc. 99-17 within 75 days of formation electing §475(f) treatment. The entity opens its own brokerage accounts, takes its own funding, and conducts the trader's trading activity from the formation date forward. The trader's gains and losses generated in the entity from formation through December 31, 2026 are subject to mark-to-market treatment, ordinary income or loss, and wash sale relief, even though the trader's individual 2026 election window passed in April.

Several practical points govern the entity structure. The entity has to actually trade with substance. Forming an entity, transferring securities, and then continuing to make all decisions through the personal account is form over substance and the IRS will collapse the structure. The entity needs its own brokerage account, its own funding, and its own trading activity from inception forward.

The trader has to qualify the entity for trader status, not just qualify the individual. The entity must conduct trading with the same continuity, regularity, and frequency that would qualify an individual trader under the Endicott line of cases. An entity that opens in June and trades for six months can establish trader status if the activity is genuine and substantial, practitioners generally suggest a Q4 minimum of dedicated trading activity to support the position, but the standard is the same fact-intensive analysis applied to individuals.

The entity choice matters. A single-member LLC defaults to disregarded entity status, meaning the LLC's activity is reported on the individual's Schedule C and the LLC is not a separate taxpayer for federal tax purposes. To get the new-entity timing benefit, the LLC must either be a multi-member LLC (partnership taxation), elect S-corp status under Form 2553, or elect to be taxed as a corporation under Form 8832. The most common Houston structure is a multi-member LLC with the trader and the trader's spouse as members, electing partnership taxation, with the §475(f) election made internally within 75 days of formation. S-corp election adds a payroll requirement and reasonable-compensation analysis but can produce favorable QBI and SE tax outcomes for some traders.

The Segregation Benefit, Personal Investments Stay Separate

The single most underappreciated feature of the entity strategy is what it lets the trader do at the individual level. Under §475(f)(1)(B), a trader who has elected mark-to-market must identify any security held for investment rather than for trading; failure to identify means the security gets caught up in the §475 mark-to-market regime and is treated as ordinary income or loss along with the rest of the trading activity.

The identification requirement is administratively burdensome and audit-prone. The trader has to make the identification on the day the security is acquired (for new positions) or before the §475 election takes effect (for existing positions at the time of election). The identification has to be in the trader's contemporaneous records and survive IRS scrutiny on examination, and many traders who think they have identified investment positions find out under audit that their documentation was insufficient.

The entity structure solves the identification problem cleanly. The §475 election applies only to the entity's positions. Positions held by the individual trader in their personal accounts, outside the entity, are not subject to §475 because they aren't held by the §475-electing taxpayer. The individual can hold long-term investment positions in their personal brokerage account, IRA, or 401(k), qualify for long-term capital gains treatment under §1(h), take qualified dividend treatment on dividend-paying positions, and never have to make the §475(f)(1)(B) identification.

This matters enormously for traders who have a longer-term investment thesis on certain positions alongside their active trading. A trader who actively trades AAPL, NVDA, and TSLA through the entity can simultaneously hold a personal long-term position in QQQ, BRK-B, an index fund, or a personal IRA without contaminating either side of the structure. The trading entity gets ordinary loss and wash sale relief on the trading activity. The personal account gets capital gains treatment on the long-term positions. The trader gets the best of both regimes, but only because the entity provides clean structural separation.

The Excess Business Loss Limitation Under §461(l), Why a $1 Million Trading Loss May Not Save $1 Million in Taxes

One trap that catches §475 traders by surprise is the Excess Business Loss limitation under IRC §461(l). The limitation was added by the Tax Cuts and Jobs Act in 2017, scheduled to sunset, then extended multiple times, and ultimately made permanent and inflation-indexed by the One Big Beautiful Bill Act (OBBBA) signed in 2025. For tax year 2026, the EBL thresholds are $512,000 for married filing jointly and $256,000 for single filers and other non-MFJ filers.

The mechanic works as follows. A noncorporate taxpayer's aggregate business losses (from all trades or businesses, including §475 trader losses) are deductible against non-business income only up to the EBL threshold. Losses in excess of the threshold are not deductible currently, they become a Net Operating Loss carried forward to future tax years under §172, where they can be used against future business income and against limited amounts of non-business income, subject to the 80% NOL deduction limitation also imposed by TCJA and made permanent by OBBBA.

For §475 traders, the consequence is severe. A trader with a $1.2 million loss in 2026 (married filing jointly) cannot deduct the entire $1.2 million against ordinary income in 2026. The trader can deduct $512,000 against current-year ordinary income, wages, spouse's income, other business income; the remaining $688,000 becomes an NOL carried forward to 2027 and beyond. The trader still gets the deduction eventually, but the cash flow benefit is delayed and partially constrained by the 80% NOL deduction limitation in future years. A trader who expected to wipe out a year of W-2 income with a large §475 loss may discover that only the first $512,000 (MFJ) actually offsets non-business income, and the rest sits in carryforward.

This affects entity-structure planning in several ways. A trader expecting a large losing year may want to structure income recognition and other deductions so the EBL threshold is not the binding constraint, or accept the NOL carryforward as part of the planning horizon. Married traders generally fare better than single traders because the EBL cap is doubled. The thresholds are inflation-indexed, so the cap will rise modestly over future years. And critically, the §475 election should be modeled with EBL in mind before committing, for a trader whose realistic worst-case loss exceeds the EBL threshold, the cash-flow benefit of §475 is partially capped, which changes the cost-benefit analysis.

The interaction with the entity structure adds another wrinkle. Losses generated in a partnership or S-corp pass through to the owner and aggregate at the individual level for EBL purposes, meaning the trader cannot escape the EBL cap by spreading losses across multiple entities. The §461(l) limitation applies to aggregate business losses across all activities of the taxpayer.

The Five-Year Revocation Lockout

Once the §475(f) election is made, revocation requires IRS consent under recently updated guidance, which now imposes a five-year lockout on revocation requests, the trader cannot request revocation until five years after the election takes effect, and even then must demonstrate a substantial change in circumstances. The point: the §475 election should be treated as a long-term commitment, not a one-year experiment. A trader who elects §475 in 2026 is committing to mark-to-market through at least 2031, including in years when the trader might prefer capital gains treatment. The election should be made only after a deliberate analysis of expected future trading patterns, not as a reactive move to a single year's results.

The Mechanics, Form 3115 and the §481(a) Adjustment

The §475 election is a two-step process. The first step is the election statement, attached to the prior-year tax return or extension by the relevant deadline (April 15 for individuals, March 15 for partnerships and S-corps with calendar tax years, 75 days from inception for new entities under Rev. Proc. 99-17). The second step is filing Form 3115 (Application for Change in Accounting Method) with the tax return for the first §475 year.

Form 3115 documents the change in accounting method and computes the §481(a) adjustment, the amount necessary to reset the trader's existing positions from the realization (cash) method to the mark-to-market method. For a trader who has appreciated positions on the books at the time of election, the §481(a) adjustment is positive and represents previously unrecognized gains; for a trader with depreciated positions, it is negative and represents previously unrecognized losses. Positive adjustments of $25,000 or more can be spread over four years; positive adjustments under $25,000 are taken in full in the year of change; negative adjustments are taken in full in the year of change.

Reporting after the election runs through different forms than ordinary capital-gain reporting. Trading gains and losses go on Form 4797 Part II rather than Schedule D and Form 8949. Trading expenses go on Schedule C as ordinary and necessary business expenses, including data feed subscriptions, platform fees, professional development, home office under §280A, and §179 expensing of trading equipment. Trader self-employment tax is generally not owed on §475 trading gains under Rev. Rul. 2009-32 (gains from §475(f) trader securities are not net earnings from self-employment), but Schedule C deductions are still available because the trader is engaged in a trade or business. The §199A QBI deduction may be available on trading income subject to the SSTB phaseout limitations under §199A(d)(3).

How North Star Law Firm Approaches §475 Cases

Trader tax status and the §475 election sit at the intersection of tax law, accounting, and entity formation, which is exactly the work North Star Law Firm is structured for. The analysis starts with the trader-status question (does the activity actually qualify under Endicott and the related cases?), moves to the entity structure decision (LLC partnership vs. S-corp vs. no entity, and the timing implications), runs the §475 election mechanics (election statement, Form 3115, §481(a) adjustment), addresses the EBL planning under §461(l), and then carries forward into ongoing reporting on Form 4797 and Schedule C.

North Star Law Firm represents Houston traders on §475 election work, entity formation, and trader-status analysis at flat fees with payment plans available. The Houston window for the 2026 entity strategy is closing, entities formed late in the year may not generate enough trading activity to establish trader status for 2026, so the analysis should happen now rather than in October or November. For traders contemplating the structure for 2027, the planning conversation can happen earlier and produce a more deliberate election timing.

Frequently Asked Questions

Do I qualify as a trader under federal tax law?

Trader status requires that your trading be substantial in volume and frequency, conducted with continuity and regularity throughout the year, and oriented toward profit from short-term price swings. Under Endicott v. Commissioner, T.C. Memo. 2013-199 and the related cases, the typical trader makes hundreds or thousands of trades per year spread across most trading days, with holding periods measured in days. Casual swing trading, even at substantial dollar volumes, generally does not qualify.

What's the difference between a trader and an investor for tax purposes?

An investor seeks profit from dividends, interest, and long-term appreciation, with longer holding periods and less frequent trading. A trader seeks profit from short-term price swings, with substantial volume, daily activity, and short holding periods. The distinction matters because traders qualify for trade-or-business treatment of their expenses (Schedule C deductions, home office, §179 expensing) and can elect §475(f) mark-to-market accounting; investors are limited to capital gain or loss treatment, the $3,000 capital loss cap, and the wash sale rules.

I missed the April 15 deadline. Can I still get §475 treatment for 2026?

Not as an individual through the standard pathway, the individual deadline for tax year 2026 was April 15, 2026, and that window has closed. The alternative is to form a new trading entity (multi-member LLC with partnership taxation, or S-corp) and make the §475(f) election internally within 75 days of formation under Rev. Proc. 99-17. The entity then trades from formation forward and gets mark-to-market treatment for the entity's portion of 2026.

Can I keep my long-term investment positions in my personal account?

Yes, and this is one of the most valuable features of the entity strategy. The §475 election applies only to the entity's positions. Long-term investment positions held in your personal account, outside the entity, are not subject to §475 and retain capital gains treatment under §1(h), qualified dividend treatment, and standard wash sale rules. The structural separation is cleaner than relying on the §475(f)(1)(B) identification requirement at the individual level.

What's the Excess Business Loss limitation and how does it affect §475 traders?

The Excess Business Loss limitation under IRC §461(l), made permanent by OBBBA, caps deductible business losses at $512,000 MFJ / $256,000 single for 2026. Aggregate business losses above the threshold cannot be deducted against non-business income in the current year, they become NOLs carried forward to future years subject to the 80% NOL deduction limit. For §475 traders with very large losses, the EBL limitation can defer significant portions of the loss benefit into future years.

Once I make the §475 election, can I revoke it?

Only with IRS consent, which is now subject to a five-year lockout under recently updated guidance. The election should be treated as a long-term commitment of at least five years, including in years when capital gains treatment would have produced better results. Revocation requires Form 3115 and IRS approval; it is not automatic, and the IRS reviews the request based on the taxpayer's circumstances.

What forms do I file under §475?

The election statement is attached to the prior-year return or extension. Form 3115 (Application for Change in Accounting Method) is filed with the return for the first §475 year, computing the §481(a) adjustment for existing positions. Trading gains and losses are reported on Form 4797 Part II rather than Schedule D and Form 8949. Trading expenses are reported on Schedule C. The §475 election does not change the underlying income tax forms, Form 1040 for individuals, Form 1065 for partnerships, Form 1120-S for S-corps.

Next Steps for Houston Traders Considering §475

If you trade actively and need to evaluate whether §475(f) is right for your situation, the analysis should happen now rather than later in the year. North Star Law Firm provides trader-tax-status analysis, entity formation, and §475 election work for Houston traders at flat fees with payment plans available. The earlier the engagement, the more options remain on the table, particularly for the 2026 entity strategy, where late-year formation may not generate enough trading activity to establish trader status for the year.

Flat Fees. No Hourly Billing. Payment Plans Available.

North Star Law Firm | Houston, Texas

Phillip Zagotti, JD/CPA | 832-384-4526

11740 Katy Freeway, Suite 1700, Houston, TX 77079