IRC 475 Mark-to-Market Trader: Ordinary Losses Explained

Key Takeaways

• The IRC 475 mark-to-market trader election converts all trading gains and losses to ordinary income, removing the $3,000 capital loss cap and letting large trading losses offset wages, spouse's salary, or other income.
• Wash sale rules under Section 1091 do not apply to Section 475 positions, eliminating one of the biggest compliance headaches for active traders.
• The election is due April 15 of the year you want it to apply, not April 15 of the following year, and missing the window costs a full year of the benefit.
• Trader status is a facts-and-circumstances test: courts have rejected taxpayers with fewer than roughly 400 trades per year or average holding periods above a month, regardless of how active the account appears.

What It Is

IRC §475 began as a mandatory accounting method for securities dealers. Subsection (f) extends the same method, by election, to active traders in securities and in commodities. A trader who makes the election treats every open position on December 31 as if it were sold at fair market value. The resulting gain or loss, plus any realized results during the year, is reported as ordinary income on Form 4797 rather than capital gain on Schedule D.

The election has three big mechanical effects: ordinary-income treatment (which allows unlimited loss deduction against other income), the wash sale rule does not apply to §475 positions, and the annual mark means no deferral of gains on winners still held.

The Intuition

Capital loss rules are brutal for active traders. A non-elected trader whose capital losses exceed gains can deduct only $3,000 against ordinary income per year and must carry the rest forward. A full-time trader who loses $200,000 in a bad year would need decades to work through that carryforward. Section 475 flips the switch. Losses become ordinary, fully deductible against wages, interest, or spouse's salary, subject to the excess business loss cap in §461(l).

The cost is symmetric. Gains are ordinary too, losing the preferential long-term capital gain rates. That is why the election suits traders whose holding periods are already short enough that long-term treatment was never realistic.

How It Works

Two gates control access. First, the IRS must agree you are a trader in securities, not an investor. The factors from case law (Chen, Holsinger, Endicott) include trading frequency, substantial number of trades, short holding periods, and seeking profit from daily market movements rather than dividends or long-term appreciation. There is no bright-line test, but courts have rejected taxpayers with fewer than roughly 400 trades per year or average holding periods above a month.

Second, the election itself. An individual already in business attaches a statement to the prior-year return (or a timely extension) by April 15, per Rev. Proc. 99-17. New taxpayers elect within 75 days of forming the entity or starting the activity. Once elected, the method applies until the IRS consents to revoke it.

§475(f) workflow:
  Step 1  Qualify as a trader (facts and circumstances)
  Step 2  File election statement by the original due date
  Step 3  Change accounting method via Form 3115 in year 1
  Step 4  Mark open positions to market on 12/31 annually
  Step 5  Report on Form 4797, Part II (ordinary gain or loss)

Most serious practitioners run the activity through an S corporation or a partnership so the entity can pay a W-2 salary, fund a solo 401(k), and deduct health insurance. The entity also makes the election cleaner because the 75-day new-taxpayer window applies.

Worked Example

A day trader opens a single-member LLC taxed as an S corporation on January 10. Within 75 days she files the §475(f) election. During the year she realizes $180,000 of gains and $230,000 of losses, and at year-end she holds two open positions with unrealized losses of $25,000.

Without the election: net capital loss of $50,000 realized, $3,000 deductible, $47,000 carried forward. Unrealized losses do not count. Wash sales could disallow part of the realized losses.

With §475: realized net loss $50,000 plus mark-to-market loss of $25,000 equals $75,000 of ordinary loss. That offsets her spouse's $150,000 salary on their joint return, subject to the §461(l) excess business loss limit ($313,000 single or $626,000 joint for 2026, indexed). Wash sales are ignored. The solo 401(k) contribution is based on the W-2 she pays herself from the S corp, not the trading loss.

Common Mistakes

1. Missing the election deadline. The statement is due April 15 of the year you want it to apply to, not the year it is filed. Missing the window costs you a full year of the method.

2. Assuming trader status is automatic. Holding a trading account and placing 200 trades does not make you a trader. The IRS has revoked claimed trader status from taxpayers with seemingly active accounts when holding periods or profit motives failed scrutiny.

3. Forgetting Form 3115. The first year requires a change-in-method filing that produces a §481(a) adjustment for the deemed sale of existing inventory. Skipping it is a procedural defect that can void the election.

4. Mixing investment and trading accounts. Section 475 applies only to positions identified as held for the trading business. A segregated investor account kept alongside the trader account preserves long-term capital gain treatment on long-horizon holdings, but only if identification is contemporaneous and clean.

5. Ignoring the §461(l) cap. Ordinary losses above the excess business loss threshold cannot offset non-business income in the current year and roll to a net operating loss.

Frequently Asked Questions

Q: What is the IRC 475 mark-to-market trader election in simple terms? It is an accounting method election that lets qualified traders report all their trading profits and losses as ordinary income rather than capital gain. At year-end, every open position is deemed sold at market value. Losses become fully deductible against any income, not capped at $3,000, and the wash sale rule stops applying to covered positions.

Q: How does the IRC 475 election affect investment decisions? It suits traders who expect net losses in a bad year, since unlimited ordinary losses can offset other household income immediately. It hurts traders who hold positions long enough to earn long-term capital gains rates, because the election forfeits those preferential rates on everything it covers.

Q: What is a real-world example of the Section 475 election benefit? A day trader using a Section 475 election has $50,000 of realized losses and $25,000 of unrealized losses at year-end. Under the election, the total $75,000 is an ordinary loss that offsets her spouse's $150,000 salary on a joint return. Without the election, she could only deduct $3,000 against ordinary income and would carry the rest forward as capital loss.

Q: How can a trader make the Section 475 election correctly? Attach an election statement to your prior-year return by April 15, file Form 3115 for the change-in-method adjustment in the first year, segregate any investment account you want to keep on capital gain treatment, and confirm trader status with sufficient trade frequency and short average holding periods before claiming the election.

Q: How is the Section 475 election different from Section 1256 futures treatment? Section 1256 automatically applies to regulated futures contracts and broad-based index options, splitting gains 60 percent long-term and 40 percent short-term regardless of holding period, with no election required and no trader-status test. Section 475 is an optional election for securities traders that converts everything to ordinary, better for loss years, worse for gain years if positions could otherwise qualify for long-term treatment.

Sources

1. Internal Revenue Service. "Topic No. 429, Traders in Securities (Information for Form 1040 Filers)." https://www.irs.gov/taxtopics/tc429
2. Cornell Legal Information Institute. "26 U.S. Code Section 475, Mark to market accounting method for dealers in securities." https://www.law.cornell.edu/uscode/text/26/475
3. Internal Revenue Service. "Revenue Procedure 99-17." https://www.irs.gov/pub/irs-drop/rp-99-17.pdf
4. Bloomberg Tax. "Section 475 Mark-to-Market Election Portfolio." https://pro.bloombergtax.com/brief/mark-to-market-election-section-475/

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.