This post uses hypothetical scenarios for illustrative purposes only. It does not describe any actual client, transaction, or representation, and is not legal advice.
Take a typical situation: a founder built an S corporation over twenty years, and somewhere around year twelve a diligent estate planner moved blocks of stock into trusts for the founder’s children. Good planning. Then the letter of intent arrives, the buyer’s tax team starts its S corporation diligence, and the second question on the list — after “may we see the Form 2553” — is “please provide the QSST or ESBT elections for each trust shareholder.” Long pause. Nobody in the room has heard those acronyms. The estate planner has retired. And the deal’s entire tax structure is suddenly resting on whether a two-page election was mailed to an IRS service center years ago.
Only certain trusts can hold S corporation stock
Subchapter S is a privilege with a guest list. Section 1361(b) limits an S corporation to eligible shareholders — individuals, estates, certain trusts, certain exempt organizations — and the trust rules in section 1361(c)(2) are narrower than most people assume. A grantor trust works while the grantor is alive and treated as owner. After the grantor dies, the trust generally has a two-year grace window. A trust that receives stock under a will gets a similar short runway. Beyond those windows, the two workhorses are the qualified subchapter S trust, which requires a single income beneficiary who receives all the trust’s income currently and who personally files a QSST election under section 1361(d), and the electing small business trust under section 1361(e), where the trustee files the ESBT election and the trust pays tax on its S corporation income at the top marginal rate. The elections are not formalities layered on top of eligibility — they are the eligibility.
Miss one, and the consequence is automatic. The moment an ineligible shareholder holds a share, the S election terminates by operation of law. No IRS notice, no grace period, no materiality threshold. The company keeps filing Forms 1120-S, the shareholders keep reporting flow-through income, and everyone operates for years inside a corporation that quietly became a C corporation the day the trust took the stock without its election. It surfaces the way most latent tax problems surface — in diligence, at the worst possible time.
The buyer cares more than the founder does
Why does a buyer pull this thread so hard? Because the popular S corporation deal structures live or die on a valid election. A section 338(h)(10) election — the classic way a stock sale gets asset-sale tax treatment, which I covered in the post on what that election costs the founder — is only available for a target that actually is an S corporation. Same for a 336(e) election, and the ubiquitous F-reorganization structure assumes the historic company’s S status was valid from the start. If the S election failed six years ago, the buyer is not acquiring a flow-through; it is acquiring a C corporation with phantom years of entity-level tax exposure, interest, and penalties — and the seller’s shareholders may have personal refund claims tangled into the same years. The clean single-layer tax model the deal was priced on evaporates.
That is why the S corporation status representation sits in the fundamental reps, why tax insurers underwriting an S corporation policy ask about trust shareholders before almost anything else, and why the diligence request list wants every trust instrument, every gift or death transfer on the stock ledger, and every election with proof of filing. A founder can save an enormous amount of leverage by running that exercise before the buyer does — the corporate hygiene equivalent of the pre-sale physical. The same diligence file supports the stub-period closing-of-the-books election and the tax distribution mechanics that S corporation deals need anyway.
The fix is more routine than the panic suggests
Here is the reassuring part: the IRS has spent a decade building off-ramps, because these failures are common and almost always innocent. The main road is Rev. Proc. 2013-30, which consolidates late-election relief for exactly this family of problems — late S elections, late QSST elections, late ESBT elections, late QSub elections. If the failure is discovered within three years and 75 days of the intended effective date, the trust files the late election with a reasonable-cause statement under the streamlined procedure — the IRS’s late election relief page walks through it — with no user fee and no private letter ruling. The window is not even absolute: section 5.04 of the revenue procedure can excuse the three-year limit where the specific conditions are met, and practitioners use it. The consistent thread through all of it is behavior: everyone must have reported as though the election were in place. The family that filed twelve years of returns on flow-through assumptions is, for once, helped by its own mistake.
Where the streamlined route runs out, section 1362(f) is the safety valve. It lets the IRS treat an inadvertent termination as never having happened, on a private letter ruling request showing the termination was inadvertent, that corrective steps were taken within a reasonable time after discovery, and that the corporation and shareholders agree to whatever adjustments the Service requires. Rulings in this area are granted with regularity — inadvertence is the norm, not the exception — but a PLR is a months-long process with a user fee, which means the discovery date matters enormously. A problem found in the founder’s pre-LOI cleanup gets fixed quietly before anyone prices it. A problem found three weeks before signing becomes a negotiation: close with a specific tax indemnity and escrow for the S status exposure, bind a tax insurance policy that covers the ruling risk, or hold the closing for the fix. All three happen in practice. The likely outcome in most deals is a fix plus a belt-and-suspenders indemnity — but the version of the deal where the founder found the problem first is always the cheaper one.
Put the trust audit before the term sheet
The practical sequence for a founder contemplating a sale is short. First, inventory every shareholder on the ledger and flag anything that is not a natural person — every trust, every custodial account, every estate. Second, match each trust to its eligibility basis and its election, with the actual filed paper, not a recollection that “the lawyers handled it.” Third, if anything is missing, start the Rev. Proc. 2013-30 or 1362(f) work now, before a buyer’s diligence clock and a PLR clock are running against each other. The estate planning that moved stock into trusts was the right instinct — founders should keep doing it. It just comes with a filing, and in an S corporation sale, the filing is the difference between a footnote and a firestorm.
If you are selling an S corporation or planning around trusts that hold its stock, feel free to reach out to my firm manager, Magda, at Magda@montague.law, or fill out our contact form. Mention you read this post.
