A Section 475(f) mark-to-market election can change how a qualifying US securities trading business reports covered gains and losses. It is a consequential accounting choice, not a universal tax-saving option or a way to fix an unprofitable strategy.

The first check is whether the activity qualifies as a trading business. The second is whether a timely, valid election is appropriate. IRS Topic 429 explains both requirements.

What Changes for Covered Securities

With a valid election, covered trading gains and losses are generally ordinary rather than capital. Year-end marking can recognise gains or losses on open positions. The usual capital-loss and wash-sale rules do not apply to covered mark-to-market trading activity.

That does not mean every asset you own is included, or that all losses can offset all income without any other limitation. Securities properly identified as investments remain distinct, and other tax restrictions can still matter. Keep both account scope and records clear.

The Election Statement and Form 3115 Are Different Steps

For an existing taxpayer, the election is generally due by the unextended return due date for the year before the intended effective year. The statement goes with that return or its extension request. An accounting-method change using Form 3115 may then be required.

The IRS describes a separate books-and-records procedure for a new taxpayer that did not need to file for the prior year. Forming an LLC does not automatically make an existing individual a new taxpayer. Use the IRS instructions and an adviser to establish the correct taxpayer, effective year and filing steps.

What to Model Before Electing

Compare at least these situations using your actual account records:

  • A profitable year with open positions at year end.
  • A losing year, including other loss limitations that may apply.
  • A year when activity drops below the level needed for trader status.
  • A mixed portfolio containing investments and business trading positions.

A gain recognised without a cash sale can create a payment-planning problem. Administrative work also remains: trade reconciliation, basis adjustments, investment identification and the accounting-method transition all need records.

Reversal Is a Separate Decision

Do not assume the election ends simply because you stop trading or leave a box blank. IRS Topic 429 describes notification and accounting-method procedures for revocation, including additional conditions for changes within five years.

For the broader status question, see Trader Tax Status and Section 475. Bring the proposed election to a professional before the deadline, rather than after calculating a bad year's losses.

Frequently Asked Questions

Is April 15 always the deadline?

Use the applicable unextended return due date and taxpayer rules, not a fixed calendar date copied from an old article.

Does the election remove every wash sale in my household?

No. Its scope is covered business activity; separately held investments and other accounts need their own treatment.

Does it guarantee an unlimited deduction?

No. It changes the character of covered gains and losses, but other limitations and the taxpayer's circumstances can still affect deductions.

Risk Disclaimer: Trading involves substantial risk of loss. Past performance is not indicative of future results. See our full risk disclaimer.