A Retiree Faces a $45,000 Tax Bill After Selling a $500,000 Portfolio. A Section 351 Strategy Had Promised Zero, But the IRS Rejected It.

Quick Read

• IRS Notice 2026-62 is aimed at investors who shifted appreciated stock into ETFs through engineered Section 351 transactions, while ordinary ETF shareholders are not affected.

• A $300,000 gain on a repositioned portfolio can produce a federal tax bill ranging from $45,000 to $71,400, which is the same deferral those conversion deals were designed to avoid.

• Future IRS guidance could reach completed conversions retroactively, so participants should review their carryover basis and speak with a CPA before final rules are issued.

• Building a portfolio and living off it are very different skills, and almost nobody teaches the second one. The Definitive Guide to Retirement Income explains that challenge, and it is free today. (Sponsor)

If you own a handful of index ETFs in a brokerage account, a new IRS notice includes language aimed at a very specific set of investors. The Treasury Department and IRS recently released Notice 2026-62, targeting a narrow category of engineered transactions that use the same structure that helps ETFs remain tax-efficient.

In plain terms, the notice says ordinary ETF share creation and redemption remain untouched. The concern is with investors who moved appreciated stock into an ETF through arranged transactions that the agencies describe as novel investment fund strategies.

Why ETFs Usually Avoid Capital Gains Distributions

ETFs work with large Wall Street firms known as authorized participants. These firms transact directly with the ETF to acquire large blocks of shares, called creation units, and later return those blocks when they want to exit. When a block is redeemed, the notice says the ETF decides which underlying assets to distribute, and it often hands out appreciated securities.

That type of payout is an in-kind distribution: the fund pays in stock rather than cash. Under Section 852(b)(6) of the tax code, that can produce nonrecognition of realized gain or loss for the ETF. As a result, the fund can remove its most appreciated holdings without selling them, and shareholders are not handed a taxable capital gain.

The Real Focus: Section 351 Conversion Deals

Section 351 generally allows property to be transferred to a corporation in exchange for stock without immediate tax on the gain. For tax purposes, an ETF is treated as a corporation. According to the notice, the arrangement works like this: an investor contributes a diversified portfolio with built-in gains to an ETF. The ETF then issues creation units to an authorized participant in exchange for securities or cash that match its strategy. After that, it redeems those units by transferring the investor’s original securities to the participant.

The agencies say investors using the structure expect to avoid recognizing the built-in gains in their securities while ending up with an ETF holding a meaningfully different portfolio. In the government’s view, the two tax provisions are being used together in a way neither was intended to produce.

A second variation involves investors with one or two concentrated holdings. They place those assets into a partnership that invests at least 20 percent of its assets in something other than stocks or securities, and then carries out the same conversion.

What the Deferred Tax Can Cost

Consider a retiree with a $500,000 stock portfolio that originally cost $200,000. If she sold it to change strategies, she would realize a $300,000 long-term gain. At the 15% federal capital gains rate, that would mean a $45,000 tax bill.

If her income pushed the entire gain into the 20% bracket and also triggered the 3.8% net investment income tax, the bill would rise to $71,400. In many states, income tax would add even more. The conversion strategy promised the same move without immediate tax, and that is the deferral the IRS is now challenging.

The Companion Ruling Treats It as a Sale

The related ruling, Rev. Rul. 2026-20, says these contributions are properly treated as taxable exchanges under Section 1001 between the contributing investors and the authorized participant, rather than as a contribution to the ETF that qualifies under Section 351. In other words, the investor is treated as having sold the stock to the authorized participant, and the gain is taxed.

The notice does not address using Section 351 to launch a new ETF with assets intended to remain in the fund.

Retroactive Risk for Those Who Already Did the Deal

Additional IRS guidance may still follow, including a designation of these arrangements as a transaction of interest or a listed transaction. That guidance could apply only going forward, or it could reach transactions that have already been completed. Even now, the IRS can challenge these strategies during an audit under existing law.

The agencies also say any future guidance will be aimed at specific abusive transactions, will try to keep compliance burdens low, and will preserve market expectations for conventional, long-established tax planning that fits congressional intent.

If you completed one of these conversions, gather the transaction documents and determine whether your ETF shares received a carryover basis. That figure will help show what you could owe if the IRS applies this reasoning to your case, and it is wise to speak with a CPA or fiduciary tax advisor before final guidance is released.

This is one of several IRS rules that can quietly erode a portfolio, and the others are discussed in a free guide to retiree tax traps.

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