Buying out a trust beneficiary means paying a lump sum today in exchange for that beneficiary’s right to future trust distributions. Whether you are the one cashing out or the one writing the check, three things decide whether the deal works: what the trust document allows, how the interest is valued, and how the IRS treats the payment on both sides. Get any of those wrong and the transaction can be voided by a court, produce a tax bill that swallows the proceeds, or quietly create a taxable gift no one intended.
Can the Interest Actually Be Sold
Before price comes permission. Read the trust instrument end to end. Some documents flatly prohibit assignment of a beneficial interest, some allow it only to family members, some require trustee consent, and some permit transfer only after a specific triggering event. The document controls.
Spendthrift Clauses
Most well-drafted trusts contain a spendthrift clause, which blocks a beneficiary from voluntarily selling or pledging their interest and blocks creditors from reaching it. Where a valid spendthrift provision exists, a buyer who proceeds anyway has little ability to enforce the deal.
State law recognizes narrow exceptions, but they run to involuntary creditor claims rather than voluntary sales: a beneficiary’s child or dependent reaching income for unpaid support, government claims, and creditors who provided services to protect the beneficiary’s trust interest itself. None of those opens a door for a third-party buyer.
Vested Versus Contingent Interests
A vested interest is one the beneficiary is certain to receive. If the trust says distribute $50,000 to John at age 30, and John has turned 30, that is vested. A contingent interest depends on a future event that may never happen, such as a distribution triggered only if the beneficiary completes a college degree. Contingent interests carry more legal risk and trade at steeper discounts.
The Trustee’s Sign-Off
The trustee usually holds approval authority over any transfer, and even when the document is silent, a trustee who learns of a proposed buyout has a fiduciary duty to evaluate whether the deal serves the trust and protects the remaining beneficiaries. A trustee who approves a below-market transaction can be personally liable.
For irrevocable trusts, trusts with minor or incapacitated beneficiaries, or ambiguous trust language, the trustee often needs a court order before the transfer can close. That judicial blessing protects the trustee and makes the transaction very hard to unwind later.
When the Trustee Wants to Be the Buyer
This is where deals go sideways. A trustee who purchases a beneficiary’s interest sits on both sides of the transaction, and in most states that creates a presumption of breach of fiduciary duty. Courts scrutinize these deals closely and can void them outright, returning the interest to the seller and unwinding the payment.
A trustee-buyer can overcome that presumption in one of three ways: explicit authorization in the trust document permitting the trustee to purchase interests; informed written consent from all affected beneficiaries after full disclosure of the conflict, the terms, and the risks; or prior court approval obtained through a petition before closing. Partial disclosure or any pressure on the seller defeats consent. Without one of these paths, the deal is voidable no matter how fair the price.
Setting the Price
The buyout price should reflect the present value of the seller’s right to future distributions, discounted for the time value of money, the illiquidity of the interest, and the uncertainty of actually receiving anything. That is rarely a back-of-envelope calculation, and the parties almost always need a qualified appraiser or actuary.
The Section 7520 Rate
For tax and estate-planning purposes, the IRS requires annuity interests, life interests, and remainder interests in trusts to be valued using the Section 7520 rate, published monthly and equal to 120% of the federal midterm rate, rounded to the nearest two-tenths of a percent. Through the first several months of 2026, the Section 7520 rate has ranged from 4.6% to 4.8%.1Internal Revenue Service. Section 7520 Interest Rates A higher rate raises the value of an income interest and lowers the value of a remainder interest, so the month you close can move the number meaningfully.
The Section 7520 rate sets the floor for IRS purposes. Arm’s-length negotiations often layer on steeper market discount rates, commonly 15% to 35%, reflecting illiquidity, credit risk, the absence of a secondary market for trust interests, and the possibility that a trustee with discretion cuts distributions.
How the Distribution Standard Moves the Number
A mandatory standard, such as “the trustee shall distribute all net income quarterly,” produces a predictable cash-flow stream. Predictability lowers risk, raises present value, and justifies a smaller discount.
A discretionary standard, such as “the trustee may distribute income and principal as the trustee deems advisable,” works in the opposite direction. The buyer has no guarantee of receiving anything in a given year, and interests in purely discretionary trusts often trade at steep discounts because the trustee can legally withhold every dollar.
Whether the seller’s interest is in income only, or in principal, also matters. An income-only interest is valued without reference to the underlying principal. A remainder interest projects the expected termination date and discounts that future lump sum back to today.
Appraising the Underlying Assets
If the trust holds non-marketable property such as real estate, a closely held business, or collectibles, a formal appraisal of those assets is the starting point. You cannot value a percentage of the trust without first knowing what the trust is worth. Appraisal costs for non-marketable holdings generally run from several hundred to several thousand dollars. For interests tied to a beneficiary’s lifespan, the appraiser applies actuarial mortality tables to project the payment stream before discounting to present value.
Papering the Deal
The core document is an Assignment of Beneficial Interest, which formally transfers the seller’s equitable rights in the trust to the buyer in exchange for the purchase price. It should include the seller’s representations that the interest is free of liens and that the seller has authority to sell, plus an indemnification clause protecting the buyer against undisclosed claims. The trustee should acknowledge the assignment in writing, which releases the seller from future obligations and puts the trustee on notice to direct distributions to the buyer.
Court approval is often required for irrevocable trusts, trusts with minor or incapacitated beneficiaries, and cases where the trust language is ambiguous about transfers. The petition typically includes the valuation analysis, the proposed terms, and an explanation of the impact on remaining beneficiaries. The court examines the fairness of the price and the fit with the trust’s purposes, and if early termination is on the table, whether it complies with state trust code. An approved order legally substitutes the buyer for the seller in all future trust matters.
At closing, the buyer delivers the funds and receives the executed assignment and any court order. The buyer should then send formal written notice of the ownership change to the trustee, the remaining beneficiaries, and any other parties the instrument or state law requires.
What the Seller Owes in Tax
The sale of a beneficial interest in a trust is generally treated as the sale of a capital asset. A trust interest does not fall within any of the exclusions from the capital asset definition under the Internal Revenue Code.2Office of the Law Revision Counsel. 26 U.S. Code 1221 – Definition of Capital Asset The seller reports the transaction on Form 8949, and the results flow to Schedule D.3Internal Revenue Service. About Form 8949, Sales and Other Dispositions of Capital Assets
The Term Interest Trap
The largest hazard is the term interest rule in Section 1001(e). When a beneficiary sells a term interest, meaning an income interest, life estate, or other interest that lasts for a defined period or a lifetime, the seller’s adjusted basis is effectively reduced to zero if the basis was acquired through inheritance, gift, or spousal transfer. The statute specifically disregards any portion of basis determined under Section 1014 (inherited property), Section 1015 (gifted property), or Section 1041 (spousal transfers) when calculating gain on the sale.4Office of the Law Revision Counsel. 26 U.S. Code 1001 – Determination of Amount of and Recognition of Gain or Loss
The practical result: the seller’s entire proceeds become taxable gain. That is a sharp reversal of the usual rules. Property inherited from a decedent normally takes a stepped-up basis equal to fair market value at the date of death.5Office of the Law Revision Counsel. 26 U.S. Code 1014 – Basis of Property Acquired From a Decedent Gifted property normally carries the donor’s basis.6eCFR. 26 CFR 1.1015-1 – Basis of Property Acquired by Gift The term interest rule strips both of those away for measuring gain on the sale.
One exception matters enormously. The rule does not apply when the entire interest in the underlying trust property is transferred to the same buyer or as part of the same transaction.4Office of the Law Revision Counsel. 26 U.S. Code 1001 – Determination of Amount of and Recognition of Gain or Loss If the buyer is acquiring both the income interest and the remainder, the seller can preserve basis and cut the taxable gain substantially. Structuring the deal to qualify can save tens or hundreds of thousands of dollars, so raise it before you finalize terms.
Long-Term Capital Gains Rates
If the seller held the interest for more than a year, the gain qualifies for long-term capital gains treatment. For 2026, those rates are 0%, 15%, or 20% depending on taxable income. Single filers cross into the 15% bracket at $49,450 and into the 20% bracket above $545,500. Married couples filing jointly reach 15% at $98,900 and 20% above $613,700. Higher-income sellers may also owe the 3.8% net investment income tax on top.
If the interest is solely a right to future income with no claim on principal, the IRS may characterize the proceeds as ordinary income rather than capital gain. The income-versus-principal call is the most consequential tax determination in the deal and should be settled with a tax professional before you sign.
What the Buyer Owes in Tax
The purchase price sets the buyer’s cost basis in the acquired interest. That basis was not determined under Section 1014 or 1015; it came from an arm’s-length purchase. If the buyer later sells, the term interest rule in Section 1001(e) does not strip it away.4Office of the Law Revision Counsel. 26 U.S. Code 1001 – Determination of Amount of and Recognition of Gain or Loss
As the buyer receives distributions, those payments are first treated as a return of the investment and are tax-free until the basis is fully recovered. After basis is exhausted, further distributions are taxed according to their character: ordinary income for interest and dividends, capital gain for proceeds from asset sales within the trust. Amortize basis ratably over the expected life of the interest rather than applying it all against the first few payments.
Record-keeping is not optional. Track the purchase price, the acquisition date, every distribution received, and the running basis balance. Without those records, the IRS can treat distributions as fully taxable ordinary income from the first dollar, which means paying tax twice: once to buy the interest and again on every payment out.
Below-Market Prices Create Gift Tax Exposure
When the buyer pays less than fair market value, the IRS treats the shortfall as a gift from seller to buyer. Under Section 2512(b), any transfer of property for less than adequate and full consideration in money or money’s worth is a deemed gift equal to the gap between the property’s value and the price paid.7Office of the Law Revision Counsel. 26 U.S. Code 2512 – Valuation of Gifts That deemed gift counts against the seller’s lifetime gift and estate tax exemption and may require a gift tax return.
The risk runs highest in family buyouts negotiated informally without an independent appraisal. A brother buying his sister’s trust interest at a family discount can create a taxable gift from sister to brother, eating into her lifetime exemption for no good reason. A documented, independent valuation is the simplest defense.
The 2026 Exemption Sunset
Timing carries unusual weight this year. The Tax Cuts and Jobs Act roughly doubled the basic exclusion amount for estate and gift taxes through 2025. In 2026, the exclusion reverts to its pre-2018 level of $5 million adjusted for inflation, expected to land around $7 million per person.8Internal Revenue Service. Estate and Gift Tax FAQs That is roughly half of the 2025 exemption. A below-market buyout that would have been absorbed by a $13 million exemption last year could now push the seller past the reduced threshold and generate actual gift tax liability. Anyone closing a buyout in 2026 or later should confirm the price reflects genuine fair market value, supported by an independent appraisal consistent with Section 7520 valuation principles.1Internal Revenue Service. Section 7520 Interest Rates