Pre-sale estate planning: why the planning window closes when the buyer shows up
Most owners of $20M+ businesses think estate tax is a problem for someone else. For someone whose net worth is the business they are about to sell, that assumption gets expensive at the moment of the sale. The federal estate tax is a flat 40% on every dollar above the lifetime exemption, and a successful sale is the event that turns a privately held interest into a balance-sheet number the IRS can see clearly. The right time to address it is before the buyer is at the table.
The OBBBA window
The One Big Beautiful Bill Act, signed July 4, 2025, made the lifetime exemption amount $15 million per person, inflation-indexed, for transfers on or after January 1, 2026. That number is the amount you can give away during life or at death without federal gift or estate tax. Above it, the rate is 40%.
For a married couple, the combined exemption is $30 million. That sounds large until you put it next to the after-tax proceeds of a $50 million business sale, where the seller and spouse can find themselves with a taxable estate of $40 million or more once the sale settles and the proceeds sit in their accounts.
The exemption can change. OBBBA made the $15M amount permanent under current law, but "permanent" in tax language means "until the next bill changes it." Planning while the exemption is at $15M and the rules favor pre-sale transfers is the prudent move for owners who will face exposure either way.
Transfer low, sell high
The mechanic that makes pre-sale planning so powerful is the valuation gap between what your business is worth to a buyer and what a minority interest in your business is worth on a qualified appraisal for gift-tax purposes.
When you sell 100% of the company to a strategic buyer, the price reflects synergy, control, marketability, and the buyer's strategic rationale. When you gift a 30% non-voting interest to a trust, the appraiser values that interest standalone: a minority block, with no control over distributions, no influence on a sale, and no liquid market. That interest typically carries a 20% to 40% discount for lack of marketability and lack of control. A 30% interest in a $50 million business does not have a $15 million gift-tax value. It can be valued at $9 million or $10 million after discounts.
The result: you transfer the same economic share of the business at a lower stated value, using less of your lifetime exemption. After the sale closes at the full enterprise value, the trust receives its proportionate share of the proceeds, which is now sitting outside your estate and free of estate tax forever.
A tale of two founders
Two founders, identical businesses worth $39.5M today, identical heirs, identical health, identical timelines. The only difference is what they do in the eighteen months before the sale.
Same business. Same sale. Same heirs. Founder 2's family receives $15.3 million more, simply because a 44% interest moved out of the estate at a discounted pre-sale valuation, then rode the appreciation to closing inside a structure outside the estate.
The three transfer taxes you are planning around
Federal wealth-transfer tax has three pieces. They all run on the same $15M exemption and the same 40% top rate.
A gift to a grandchild (or to a trust for a grandchild) is potentially hit by both gift tax and GST tax. A direct bequest at death runs into estate tax. The three exemptions are separate buckets but the same dollar amount, and the planning challenge is to use each of them efficiently in the right structure.
State estate taxes apply on top in about a dozen states. Most of those states have lower exemption thresholds than the federal $15M, which means a sale that triggers no federal estate tax can still trigger a six- or seven-figure state estate tax in places like Massachusetts, Oregon, Washington, Minnesota, and Illinois.
Beyond the outright gift
The outright-gift-to-trust example above is the simplest version. The planning toolkit goes further when there is more time and more value at stake.
Grantor Retained Annuity Trust (GRAT)
A GRAT transfers the appreciation of an asset to heirs while letting you keep the original value. You contribute business interests to the GRAT, the GRAT pays you back an annuity stream over (typically) two to ten years that equals the original value plus IRS-set interest, and any appreciation above that hurdle passes to the remainder beneficiaries with no additional gift-tax cost. GRATs are particularly useful when a sale is expected to spike value sharply within the GRAT term.
Intentionally Defective Grantor Trust (IDIT or IDGT)
An IDIT is a trust that is "defective" for income-tax purposes (the grantor pays the trust's income taxes, which is intentional and beneficial) but effective for estate-tax purposes (the assets are outside the grantor's estate). Owners commonly sell business interests to an IDIT in exchange for a promissory note, effectively financing the transfer while moving future appreciation outside the estate. The grantor's tax payments on the trust's income become an additional, gift-tax-free transfer of wealth to the trust beneficiaries.
Charitable Remainder Trust (CRT) and donor-advised funds
For owners with a philanthropic bent, a CRT can take a pre-sale contribution of business interests, sell them with no current capital-gains tax to the trust, pay the donor an income stream for life or a term, and leave the remainder to charity. The deduction reduces income tax in the contribution year. Donor-advised funds work similarly without the income stream, providing a deduction in the year of the gift and flexible grant-making over time.
Family Limited Partnerships and LLCs
Wrapping business interests in a family LP or family LLC, and then gifting member or limited-partner interests, can support the marketability and control discounts that make the pre-sale gift so powerful. Done well, this structure preserves the discount under IRS scrutiny. Done sloppily, the IRS challenges the discounts and the planning advantage disappears.
The cutoff: why you cannot do this with a buyer at the table
Every technique above shares one prerequisite. The transfer must happen before a binding sale agreement is signed, and ideally well before a buyer is in conversations. Once a deal is imminent, two things go wrong.
First, the valuation discount disappears. The IRS position, well supported in case law, is that minority and lack-of-marketability discounts cannot be claimed on an interest that, in substance, is about to convert into a known cash amount at a known date. An appraiser asked to value a 30% interest in a business with an LOI on the table is not valuing an illiquid minority interest, they are valuing a near-certain share of a near-certain cash payment. The discount evaporates, and with it the leverage that made the strategy work.
Second, the "step transaction doctrine" lets the IRS treat a pre-sale gift followed by an imminent sale as if the owner sold the business and then made a gift of cash. Gift-tax value is recalculated at the cash value, not the discounted appraisal. The planning collapses.
The practical rule of thumb is twelve months. Eighteen is safer. Twenty-four is what tax counsel will actually recommend if you ask them. The further your pre-sale transfer is from the closing, the more defensible the discount and the cleaner the structure.
Five questions for your estate attorney
- What is my taxable estate today, including the realistic post-sale value of my business? If it is under $15M (or $30M married), pre-sale planning may not be necessary. If it is meaningfully above, the rest of the questions matter a lot.
- How much of my lifetime exemption have I already used? Past taxable gifts reduce the runway. Many owners do not know this number cold.
- What is the right vehicle for my situation: outright gift to trust, GRAT, IDIT, CRT, FLP, or some combination? The answer depends on time-to-sale, expected appreciation, philanthropic intent, and family dynamics.
- How will the IRS view the discount on a minority interest gifted from my business? Defensible discounts depend on entity structure, governance documents, and timing. This is not a place to be aggressive without good counsel.
- What state estate tax exposure do I have, and would a residency change before the sale be worth considering? Several owners have legitimately changed domicile pre-sale to avoid state-level exposure. It is not for everyone, but it is on the table.
Estate planning before a business sale is one of the highest-leverage forms of financial planning available to a private-business owner. Every dollar of pre-sale transfer at a discount is roughly two dollars of after-estate-tax wealth preserved for the family. The planning is technical, the moving parts are real, and the work has to happen before a buyer is in the picture. The window is open right now. It usually does not stay open long.
Sources: Internal Revenue Code Sections 2001, 2010 (basic exclusion amount), 2503 (annual exclusion), 2601 (GST), 2701-2704 (special valuation rules). One Big Beautiful Bill Act of 2025 (P.L. 119-21), provisions amending the basic exclusion amount. Deloitte M&A Tax Talk, "The case for pre-sale estate planning," updated January 2026. This article is educational and not legal or tax advice. Pre-sale estate planning involves fact-specific valuation and structuring decisions that should be made with qualified estate counsel and tax counsel before any transfer.