What Is the Mark-to-Market Election?

The mark-to-market election is a special tax choice under Internal Revenue Code Section 475(f) available to active traders. It allows them to treat their securities as if they were sold for their fair market value on the last business day of the year, turning capital gains and losses into “ordinary” gains and losses.

1. Meaning of “Mark-to-Market Election”

In plain English, the mark-to-market (MTM) election means you “reset” your portfolio at the end of every year for tax purposes. Even if you haven’t actually sold your stocks or options, the IRS lets you pretend you did at their closing price on December 31. This turns “paper” gains or losses into actual taxable events.

The biggest change is the character of the money. Usually, trading results in capital gains or losses. With this election, your trading profits and losses are treated like regular business income (ordinary income), similar to a salary or a freelancer’s earnings.

2. Why “Mark-to-Market Election” Matters

If you are an active day trader, this election can be a total game-changer for two major reasons:

No Capital Loss Limit: Standard investors can only deduct $3,000 of net capital losses against their regular income. With MTM, your losses are “ordinary,” meaning you can deduct an unlimited amount of trading losses against other income like wages or business profits.
Goodbye, Wash Sales: The “wash sale” rule—which prevents you from claiming a loss if you buy the same stock back too quickly—is completely ignored under MTM. This simplifies record-keeping and prevents “phantom” tax bills on money you didn’t actually keep.

3. How “Mark-to-Market Election” Works

To use this method, you must first qualify for Trader Tax Status (TTS), which means you trade frequently and for short-term profits. Once you make the election, you follow these steps:

On the last day of your tax year, you determine the fair market value of all open positions.
You calculate the gain or loss as if you had sold them.
You report these amounts as ordinary income or loss.
For the following year, your “cost basis” in those stocks starts at that same year-end value.

Crucial Deadline: You cannot decide to do this when you are filing your taxes in April. You generally must file an election statement with the IRS by the tax deadline of the current year to have it apply to the next year. For example, to use MTM for next year’s trades, the paperwork is usually due by April 15 of this year.

4. Simple Example of “Mark-to-Market Election”

Imagine you are an active trader who bought 100 shares of a tech company for $10,000. By December 31, the value of those shares has dropped to $6,000. You decide to hold the shares into the next year.

Without MTM, you have no tax deduction because you haven’t sold the stock. With the Mark-to-Market Election, the IRS sees this:

$$text{Ordinary Loss} = text{Fair Market Value} – text{Original Cost}$$

$$$4,000 text{Loss} = $6,000 – $10,000$$

You get to claim a $4,000 ordinary loss on your tax return this year. If you have a job that paid you $50,000, your taxable income drops to $46,000, even though you still own the stock!

5. Who Is Affected by “Mark-to-Market Election”?

Day Traders: High-volume traders who want to avoid wash sale headaches.
Professional Swing Traders: Those who may carry large losses that they want to use to offset other income.
Hedge Funds and Entities: Trading businesses often use this for streamlined accounting.

This does not apply to long-term “buy and hold” investors, casual retail investors, or people trading within a 401(k) or IRA.

6. Common Mistakes Related to “Mark-to-Market Election”

Missing the election deadline: This is the #1 mistake. If you miss the April deadline, you are stuck with capital gain rules for the rest of the year.
Claiming it without “Trader Tax Status”: If you don’t trade enough to be considered a “business” by the IRS, they may reject your election during an audit.
Forgetting it’s permanent: Once you elect MTM, you can’t just switch back the next year without getting formal permission from the IRS.
Applying it to personal investments: You must separate your “trading business” account from your long-term personal investment accounts.

7. Forms Related to “Mark-to-Market Election”

Form 4797: This is where you report your gains and losses from the MTM election (Sales of Business Property).
Schedule C: Used to report the expenses of your trading business (like software or data feeds), while the MTM gains/losses flow through Form 4797.
Election Statement: A simple written statement attached to your prior year tax return or extension.

8. “Mark-to-Market Election” vs. Related Terms

MTM vs. Capital Gains: Capital gains are capped at a $3,000 loss limit against other income; MTM ordinary losses have no such cap.
MTM vs. Trader Tax Status (TTS): TTS is a classification (you trade like a business); MTM is a tax method you choose once you have that classification.
MTM vs. Wash Sale: Wash sale rules are an IRS “trap” for investors; MTM effectively disables that trap.

9. Related Glossary Terms

10. FAQs About “Mark-to-Market Election”

Can I use MTM for my crypto trading?
The IRS rules for Section 475 MTM are currently centered on securities and commodities. The application to crypto is a gray area, and you should check current IRS guidance for the latest on digital assets.

Does MTM mean I pay more in Social Security tax?
No. Even though MTM gains are “ordinary income,” they are generally not considered “self-employment income,” so you typically don’t pay self-employment (Social Security/Medicare) tax on them.

What happens if I stop trading?
If you cease your trading business, you may need to file a request with the IRS to change your accounting method back to the standard way.

Can I elect MTM for only some of my stocks?
No. If you make the election for your trading business, it applies to all securities held in connection with that business. You must clearly segregate your long-term personal investments in a separate account.

11. Final Takeaway

The Mark-to-Market election is a powerful, “pro-level” tax strategy that removes the handcuffs of the $3,000 capital loss limit and the complexity of wash sale rules. However, because it requires you to pay tax on “unrealized” gains at year-end and has a strict, early deadline, it’s a double-edged sword. It is most beneficial for full-time traders who treat the market as their office and want their tax return to reflect the true reality of their business wins and losses.

12. Disclaimer: This article is for general educational purposes only and should not be considered tax, legal, or financial advice. Tax rules can change, and your situation may be different. Consider consulting a qualified tax professional before making tax decisions.

What Is the “Mark-to-Market Election”?