IRC 1296: The Mark-to-Market Election for PFIC Stock

The mark-to-market election for PFIC stock, made under Internal Revenue Code Section 1296, lets a U.S. shareholder of a passive foreign investment company recognize the annual change in the stock’s value as ordinary income or loss, avoiding the punitive default tax regime that otherwise applies. It is available only if the PFIC stock is “marketable,” and the price of admission is giving up long-term capital gains rates on any appreciation. For most Americans who discover they own a foreign mutual fund or ETF, the election is worth making. This walks through when you qualify, how the mechanics work, and where the trade-offs bite.

What the Election Saves You From

The reason the MTM election exists is Section 1291. Without an affirmative election, any “excess distribution” from a PFIC and any gain on sale is spread ratably over your entire holding period, taxed at the highest statutory rate in effect for each of those years, and then hit with a non-deductible interest charge running from the original return due date for each year.¹ A ten-year hold on an appreciating foreign fund can produce an effective rate that dwarfs anything you’d pay on a comparable U.S. investment. The MTM election under Section 1296 is one of two ways out; the QEF election is the other, and the comparison matters enough to get its own section below.

Does Your PFIC Stock Qualify

Everything turns on whether your stock is “marketable.” Section 1296 defines marketable stock as stock regularly traded on a U.S. national securities exchange registered with the SEC (or the national market system established under the Securities Exchange Act of 1934), or on a foreign exchange or market the Treasury Secretary has determined has adequate regulatory oversight and trading rules.²

To the extent regulations provide, the definition also reaches stock in a foreign corporation comparable to a U.S. regulated investment company whose shares are redeemable at net asset value, along with options on qualifying stock.² A U.S. RIC that owns PFIC stock and offers its own shares redeemable at NAV can treat that stock as marketable too.

If your PFIC isn’t listed on a qualifying exchange and doesn’t fit those regulatory categories, MTM isn’t available. Privately held foreign funds, hedge funds without exchange-listed shares, and the investment portions of many foreign insurance wrappers typically fail the test.

PFIC Stock Held Through an IRA or Similar Account

If you hold the PFIC through an IRA, 401(a), 403(b), 529, or similar tax-exempt account, you aren’t treated as a PFIC shareholder in the first place, and no MTM election is available or needed.³ The tax-exempt entity is the shareholder for PFIC purposes.

Stock Held Through a Foreign Partnership, Trust, or Estate

Stock owned through a foreign partnership, foreign trust, or foreign estate is treated as owned proportionately by the partners or beneficiaries, and the MTM election is made at their level.² A disposition by the entity or by the partner is treated as a disposition by the U.S. person.

How to Make the Election

You make the election on Form 8621, attached to your income tax return for the year you want it to take effect. Treasury regulations allow it on either your original return or an amended return, so long as the amended return is filed on or before the due date (with extensions) for that tax year.⁴ The form asks for identifying information about the PFIC, the year-end fair market value, and your adjusted basis in the stock.

Making the election in your first year of ownership is clean: the MTM regime applies from day one and no Section 1291 taint ever accumulates. Waiting is where problems start.

Late Elections and the Cost of Purging

You can elect MTM after you’ve already held the stock under the default rules, but you have to purge the accumulated Section 1291 taint first, and the purge itself is taxed under those same punitive rules. Two mechanisms exist:

A deemed sale, where you treat the stock as sold at fair market value on the first day the MTM election takes effect. Any gain is taxed as an excess distribution under Section 1291, interest charge included. Losses are not recognized.
A deemed dividend, available only if the PFIC is also a controlled foreign corporation and you qualify as a U.S. shareholder of that CFC. You include your share of the PFIC’s post-1986 earnings and profits as a dividend, again run through the Section 1291 excess distribution machinery.

Either purging election has to be made on an original or timely-filed amended return. The longer you’ve held the stock without electing, the larger the built-in gain and the more you pay to escape. Investors who realize years in that they own a PFIC often face a real tax bill just to get onto the MTM regime.

How the Annual Calculation Works

Once the election is in place, you treat the stock as sold for its fair market value on the last day of each tax year. No actual sale occurs; it’s a paper exercise.

If year-end fair market value exceeds your adjusted basis, the difference is included in gross income as ordinary income, and your basis increases by that amount. If fair market value has fallen below adjusted basis, you can deduct the difference as an ordinary loss, but only up to your “unreversed inclusions.” Basis then decreases by the amount you actually deducted.²

Both the gains and the deductible losses are ordinary, never capital. That is the core trade-off. You give up any chance at long-term capital gains rates in exchange for escaping the Section 1291 interest charge.

The Unreversed Inclusions Loss Limit

The loss cap trips up a lot of people, so it’s worth working through carefully. “Unreversed inclusions” means the cumulative MTM gains you’ve previously recognized on a specific PFIC stock, minus any MTM losses you’ve previously deducted on that same stock.² The statute also folds in amounts that would have been MTM inclusions but weren’t, because Section 1291 was still applying.

Suppose you’ve recognized $30,000 in cumulative MTM gains and previously deducted $8,000 in MTM losses. Your unreversed inclusions are $22,000. If the stock produces a $35,000 paper loss this year, you can deduct only $22,000 of it. The remaining $13,000 is not recognized.

Here’s the subtle part: that disallowed $13,000 doesn’t reduce your basis. Basis drops only by the $22,000 you actually deducted.² The disallowed loss doesn’t carry forward as a separate deduction, but because basis stays higher than fair market value, the economic loss remains inside the position. If the stock recovers, you’ll recognize less future gain. If it doesn’t and you sell, the loss at sale runs into the same unreversed inclusions cap for ordinary treatment.

Selling PFIC Stock Under MTM

When you actually sell, gain or loss is figured using your continuously adjusted basis, so the amount recognized at sale is usually just the movement since the most recent year-end mark. Gain is ordinary.² Loss is ordinary too, but again capped at your remaining unreversed inclusions. Anything beyond that cap is a capital loss rather than an ordinary loss.

If the Stock Stops Being Marketable

If the PFIC is delisted or the exchange loses its qualifying status, the stock no longer meets the marketable requirement, and the MTM election terminates at the end of the last tax year the stock qualified.² The default Section 1291 regime takes over from that point. Your basis going into the 1291 period is fair market value on the last day MTM was in effect. Accumulated unreversed inclusions aren’t lost; they can offset future gains or excess distributions under 1291.

If the stock is relisted later, you can elect MTM again, but the re-election is treated as a late election and requires purging any 1291 taint from the gap.

MTM Versus a QEF Election

The other escape from Section 1291 is a qualified electing fund election under Section 1293. Under QEF, you include your share of the PFIC’s ordinary earnings and net capital gains annually at your regular rates, and the net capital gain portion keeps its long-term capital gain character. When you sell, amounts already taken into income aren’t taxed again. QEF often produces a lower total tax bill than MTM.

The catch is that QEF requires the foreign corporation to provide a PFIC Annual Information Statement showing its ordinary earnings and net capital gains computed under U.S. tax principles.³ Most foreign funds don’t produce this statement and have no reason to. Without it, QEF is off the table.

MTM asks only that the stock trade on a qualifying exchange. You don’t need the fund to cooperate. That is why MTM is the practical answer for most Americans with foreign fund holdings. If your fund does provide the annual information statement, model both before deciding; QEF frequently wins. If it doesn’t, MTM is the realistic option.

The 3.8 Percent Net Investment Income Tax

MTM gains included under Section 1296 are also net investment income for purposes of the 3.8 percent NIIT, which applies once modified adjusted gross income exceeds $200,000 for single filers or $250,000 for joint filers. Treasury regulations specifically fold Section 1296 inclusions and deductions into the net gain calculation for NIIT.⁵ Your effective rate on MTM gains can therefore reach the top ordinary rate plus 3.8 percent. MTM losses reduce net investment income symmetrically.

Revoking the Election

Once made, the MTM election cannot be revoked without the consent of the IRS Commissioner.⁴ If consent is granted, the regime stops applying in the first tax year after consent. You cannot undo the election by simply skipping a year’s filing; an unauthorized failure to apply MTM can pull you back into Section 1291 and create real compliance exposure. If a QEF election becomes possible because the fund starts issuing annual statements, request consent well before the filing deadline for the switch year.

Annual Reporting and Records

Every U.S. person who holds PFIC stock must file Form 8621 annually with their federal income tax return. For MTM shareholders, the form is where you report year-end fair market value, adjusted basis, the MTM gain or loss, and cumulative unreversed inclusions.⁶ It is required even in years with no distributions and no gain or loss.

Failing to file has real consequences. The IRS warns that taxpayers who don’t file required information returns may face penalties and criminal prosecution.³ The statute of limitations for the IRS to assess additional tax generally stays open until PFIC information reporting is satisfied, so an unfiled Form 8621 can leave old years exposed indefinitely.

Records matter as much as the filing. Keep your original cost basis, every annual MTM adjustment, the running total of unreversed inclusions, and any purging amounts from a late election. This tracking runs for the entire holding period, which for a foreign fund can stretch across decades. Without it, the IRS can challenge your reported basis, and you’ll have nothing to fall back on.

1
Office of the Law Revision Counsel. 26 U.S. Code 1291 – Interest on Tax Deferral
2
Office of the Law Revision Counsel. 26 U.S. Code 1296 – Election of Mark to Market for Marketable Stock
3
Internal Revenue Service. Instructions for Form 8621
4
GovInfo. 26 CFR 1.1296-1 – Mark to Market Election for Marketable Stock
5
Federal Register. Net Investment Income Tax
6
Internal Revenue Service. Instructions for Form 8621