Estate Planning for S Corporation Owners: Advanced Strategies for 2026

Estate planning for S corp owners has to solve four problems at once: how the stock will be valued, who is legally allowed to own it after you die, how a buy-sell agreement will be funded, and where the cash will come from to pay estate tax without selling the company. A W-2 employee has none of those problems. An S corporation owner has all of them, and the S election itself adds rules a C corporation owner never has to think about. I am a licensed insurance professional, not an attorney or CPA, so your attorney drafts the documents and your CPA handles the election. My job is the life insurance that funds the plan, and I have watched enough owners get this wrong to know the sequence matters.

For the broader framework see estate planning and business protection.

Why is estate planning for S corp owners different?

Estate planning for S corp owners is different because the S election under §1361 restricts who can be a shareholder, and a single ineligible owner, including the wrong kind of trust, terminates the election for the entire company. On top of that, the stock is usually the owner’s largest asset, it is illiquid, and its value for estate tax purposes is whatever the IRS says it is unless a well-drafted agreement fixes it.

For 2026 the federal estate and gift exemption is $15 million per person, set by the 2025 tax legislation and indexed for inflation after 2026. The IRS posts the current figure on its estate tax page. Many S corporation owners are below that line. Those above it, or who expect growth to push them above it, face a 40 percent federal rate on the excess and cannot pay it with stock.

How is S corporation stock valued for estate tax?

S corporation stock is valued at fair market value on the date of death under §2031, and the IRS will only accept a buy-sell agreement’s price as the estate value if the agreement meets the tests in §2703: a bona fide business arrangement, not a device to transfer stock to family for less than full value, and comparable to arm’s-length terms.

Two valuation issues are specific to S corporations:

• Tax-affecting. Because S corporations pay no entity-level tax, appraisers and the IRS have argued for years about whether to reduce the value for hypothetical corporate taxes. Recent Tax Court decisions have allowed tax-affecting in some cases and not others. Your appraiser needs to address it explicitly.
• Company-owned life insurance. In Connelly v. United States (2024), the Supreme Court held that life insurance proceeds received by a corporation to redeem a deceased owner’s shares increase the value of the company for estate tax purposes and are not offset by the redemption obligation. That decision changed how buy-sell insurance should be owned.

Who can own S corp stock after you die?

After your death, S corporation stock can be held by your estate for the period of administration, by a grantor trust for two years, by a testamentary trust for two years, and permanently only by a qualified subchapter S trust (QSST) or an electing small business trust (ESBT). Those permitted shareholders are listed in §1361(c)(2). Anything else, such as a standard discretionary family trust with no election, terminates the S election.

QSST

A QSST has one current income beneficiary who must receive all trust income annually and who is treated as the owner of the S stock for income tax. It works when each child is to receive their own share outright over time.

ESBT

An ESBT can have multiple beneficiaries and accumulate income, but the S corporation portion of the trust is taxed at the highest individual rate. It works when you want flexibility and are willing to pay for it.

Grantor trusts

During your life, a grantor trust such as an intentionally defective grantor trust is a permitted shareholder, which is why lifetime gifts and sales of S stock to an IDGT are common. The trust must convert to a QSST or ESBT within two years of your death. Your attorney builds the conversion into the document and your CPA files the election.

How do you fund a buy-sell agreement for an S corporation?

A buy-sell agreement is funded most safely for an S corporation with a cross-purchase structure, where each owner (or a trusteed or LLC arrangement on their behalf) owns life insurance on the others, because the proceeds stay outside the company and do not inflate its value under Connelly. A redemption agreement, where the company owns the policies, is simpler but now carries the estate tax problem the Supreme Court confirmed.

What good funding looks like:

• Coverage equal to each owner’s share of the agreed value, reviewed whenever the valuation is updated.
• Policies owned by the surviving buyers, a special-purpose LLC, or a trustee, not the S corporation.
• A disability buyout component, because owners are more likely to become disabled than to die during working years.
• Premiums paid from distributions, which are already taxed to the owners, so there is no second layer of tax.

Because a cross-purchase requires more policies as the number of owners grows, an insurance LLC that holds one policy per owner is often the cleanest answer for three or more shareholders. I shop the coverage across roughly 50 carriers so the premiums fit the company’s cash flow.

Where does life insurance create liquidity for estate tax?

Life insurance creates estate liquidity when a policy owned by an irrevocable life insurance trust pays an income-tax-free death benefit under §101(a) that is also outside the taxable estate under §2042, giving the family cash to pay the tax without selling or borrowing against the company. The trust can lend the cash to the estate or buy assets from it, and the S corporation continues without a fire sale.

Owners sometimes plan to use §6166, which allows estate tax on a closely held business to be paid over up to 14 years. It helps, but the estate pays interest and the IRS holds a lien on the business. Insurance is usually cheaper than fourteen years of interest and gives the heirs control instead of a payment plan.

How does exit planning fit into estate planning for S corp owners?

Exit planning and estate planning are the same project seen from two directions: one asks how you leave the company while alive and the other asks how the company leaves you at death, and the documents, valuation and insurance have to work for both outcomes. An owner who plans to sell to a key employee in ten years needs a funded buy-sell today in case death comes first. An owner who plans to pass the company to one child needs insurance to equalize the inheritance of the others.

The steps I see work, in order:

1. Get a defensible valuation and update it every two to three years.
2. Have your attorney draft or update the buy-sell agreement and confirm the S election survives every trust in your plan.
3. Fund the agreement with properly owned life and disability insurance.
4. Move future growth out of the estate through gifts or sales to a grantor trust, with insurance to cover the note.
5. Establish an ILIT-owned policy for estate tax liquidity if you are near or above the exemption.
6. Revisit all of it whenever ownership, value or tax law changes.

Frequently Asked Questions

Can a revocable living trust own S corporation stock?

Yes, during your lifetime, because a revocable trust is a grantor trust and a permitted shareholder under §1361(c)(2)(A)(i). After your death the trust remains eligible for two years, and by then the stock must pass to an individual, a QSST or an ESBT. Your attorney builds that transition into the trust document.

What happens to the S election if stock passes to an ineligible trust?

The S election terminates as of the date of transfer and the company becomes a C corporation, with tax consequences for every shareholder. The IRS may grant relief for an inadvertent termination under §1362(f), but it requires a ruling request, professional fees and a corrected structure. Prevention through proper drafting is far cheaper.

Should the S corporation own the buy-sell life insurance?

After Connelly v. United States (2024), company-owned insurance for a redemption increases the value of the company for estate tax without an offset for the buyout obligation. A cross-purchase or an insurance LLC keeps the proceeds outside the company. Confirm with your attorney and CPA, but most new agreements are being drafted around that decision.

How much life insurance does an S corp owner need for estate planning?

Add your share of the buy-sell value, the projected estate tax on assets that stay in your estate, and any amount needed to equalize inheritances among children, then subtract liquid assets already available. The result is the coverage target. I run the numbers with your attorney’s projection and illustrate the coverage across carriers.

Is the 2026 estate tax exemption permanent?

The 2025 legislation set the exemption at $15 million per person for 2026 with inflation indexing and no scheduled sunset, which is more stable than the prior law. Congress can still change it. Owners near the threshold generally plan as if it could fall, because the strategies that protect against a lower exemption cost little if it stays high.

If you own an S corporation and have not looked at the buy-sell, the trust language and the insurance together, I will review all three with your attorney and illustrate the coverage over Zoom. Start on our services page.