An Inheritance Agreement (also called an Heir's Agreement, Family Settlement Agreement, or Estate Distribution Agreement) is a contract among the heirs, beneficiaries, or interested parties of a deceased person's estate that establishes how the estate's assets will be divided. Recognized under the Uniform Probate Code (UPC) Section 3-912 and similar provisions in most state probate codes, these agreements allow heirs to reach a private settlement on asset distribution that may differ from the terms of the decedent's will or the intestacy statute — provided all interested parties consent and no creditors are prejudiced.

Family settlement agreements have a long history in American probate law and are generally favored by courts as a means of avoiding costly and divisive probate litigation. Under the common law principle recognized in cases like Scott v. Scott and codified in the UPC, heirs who have reached the age of majority and are competent to contract may agree among themselves to a distribution that differs from the will or intestacy scheme. Courts will enforce such agreements as long as they were entered into voluntarily, with full knowledge of the relevant facts, and without fraud or undue influence.

The inheritance agreement differs from a will (which is a unilateral document expressing the testator's wishes) and from a trust (which creates a fiduciary relationship). It is a multi-party contract among living persons who share an interest in a deceased person's estate. These agreements are particularly valuable when the will is ambiguous, when heirs dispute the interpretation of specific bequests, when the will is being contested, or when the heirs simply prefer a different distribution than what the decedent specified — such as dividing family real property rather than selling it, or allocating personal property items based on sentimental value.

An inheritance agreement is most commonly used when multiple heirs inherit a shared estate and need to agree on how to divide assets that are not easily split — such as a family home, a business interest, a vacation property, or a collection of personal items with sentimental value. Rather than forcing a sale of the family home through a probate partition action, the heirs can agree that one sibling will keep the property and compensate the others with their proportionate share from other estate assets or personal funds.

These agreements become essential when the will is being contested and the heirs want to settle the dispute without litigation. A family settlement agreement can resolve will contests, claims of undue influence, disputes over the interpretation of specific bequests, and disagreements about the executor's administration of the estate — all without the expense, delay, and emotional toll of a probate trial. Courts routinely approve settlement agreements that resolve will contests, even if the settlement terms differ significantly from the will's provisions.

Other scenarios include estates where the decedent died intestate (without a will) and the heirs want to agree on a distribution different from the statutory intestacy shares, estates with both probate and non-probate assets (retirement accounts, life insurance, joint accounts) where the heirs want to coordinate the total distribution, situations where an heir wants to disclaim their inheritance in favor of another family member (which must comply with the disclaimer requirements of IRC Section 2518 and the applicable state Uniform Disclaimer of Property Interests Act), and estates involving family businesses where the heirs must decide whether to continue, sell, or liquidate the enterprise.

The agreement must identify all parties — every heir, beneficiary, and interested party who has a legal interest in the estate must be identified by name, relationship to the decedent, and the nature of their interest (heir under intestacy, beneficiary under the will, or creditor). For the agreement to be binding and enforceable, all persons with an interest in the estate must either sign the agreement or be adequately represented (such as minors represented by a guardian ad litem or unborn beneficiaries represented by a court-appointed representative).

The asset inventory section must describe all estate assets being distributed under the agreement, with sufficient detail for each asset to be identified without ambiguity — real property by legal description, financial accounts by institution and account number, vehicles by make, model, and VIN, and personal property by detailed description. Each asset should have its agreed-upon fair market value stated, as this determines the proportionate shares and any equalization payments. The distribution terms must specify which heir receives which asset, any cash equalization payments required to make the shares proportionate, timelines for transferring title to real property and other titled assets, and the treatment of estate debts, taxes, and administration expenses.

The agreement should include representations that all parties have had access to a complete inventory of estate assets, that no assets have been concealed or undervalued, and that each party has entered into the agreement voluntarily after having the opportunity to consult with independent legal counsel. A release clause should provide that upon completion of the distribution, all parties release each other and the executor from further claims related to the estate. The agreement should address ongoing obligations — such as shared maintenance costs for undivided property during a transition period, the executor's continuing duty to file the estate's final income tax return (IRS Form 1041) and any estate tax return (IRS Form 706), and the process for handling subsequently discovered assets. All parties must sign, and notarization is recommended, particularly when real property is involved.