An Inheritance Agreement or Deed of Variation is a legal document used in England and Wales to redistribute the assets of a deceased person's estate among the beneficiaries by mutual consent, varying the terms of the deceased's will or, where there is no will, the statutory intestacy rules under the Administration of Estates Act 1925. The document allows beneficiaries to agree a different distribution from the one set out in the will or required by the intestacy rules, without the need for court proceedings, provided all affected beneficiaries agree and all are adults with legal capacity.

A deed of variation is distinguished from a simple contractual inheritance agreement by its capacity to take advantage of two important statutory provisions. Section 142 of the Inheritance Tax Act 1984 provides that a qualifying variation made within two years of the date of death is treated as if the deceased had made the varied disposition in their will, which can significantly reduce the estate's inheritance tax liability by redirecting assets to a spouse or civil partner (who benefit from the spouse exemption), to charities, or to the deceased's children (making better use of the nil-rate band and residence nil-rate band). Section 62 of the Taxation of Chargeable Gains Act 1992 similarly allows a qualifying variation to be treated as if the assets had been inherited directly by the new beneficiary, potentially removing or reducing capital gains tax on inherited assets.

The Law Commission confirmed in its 2011 report on intestacy and family provision claims that the deed of variation is an established and valuable tool of post-death estate planning in England and Wales. Deeds of variation are widely used by solicitors and estate planners to address situations where the deceased's will (or intestacy) does not reflect the beneficiaries' current wishes, does not take advantage of available tax reliefs, or does not provide for changes in circumstances since the will was made.

An inheritance agreement, where the parties are not seeking IHT or CGT write-back treatment, is a more flexible contractual document that records the beneficiaries' agreed approach to dividing the estate. It is enforceable as a contract under English law and provides a clear written record of what has been agreed, helping to avoid future disputes about the distribution of the estate.

An Inheritance Agreement or Deed of Variation is appropriate in several circumstances in England and Wales.

When the deceased's will does not reflect their actual wishes or fails to take account of changed circumstances, a deed of variation allows the beneficiaries to agree a different distribution. For example, if the deceased's children have all become financially independent but the will leaves the entire estate to them, they may wish to redirect a portion to grandchildren or to charitable causes that the deceased supported in their lifetime.

When there are significant inheritance tax savings available, a deed of variation is a powerful planning tool. If the deceased's estate exceeds the available nil-rate band and residence nil-rate band, redirecting part of the estate to a surviving spouse or civil partner (who benefit from the unlimited spouse exemption) or to charity can substantially reduce or eliminate the IHT liability. A deed of variation can also be used to equalise the estates of a married couple to make better use of both spouses' nil-rate bands on the death of the survivor.

When the deceased died intestate and the intestacy rules do not reflect what the deceased would have wanted, a deed of variation allows the heirs to agree a distribution that better reflects the family's wishes. Under the intestacy rules in the Administration of Estates Act 1925, an unmarried partner receives nothing from the estate, and the distribution among blood relatives may not match what the family considers fair.

When there is a potential claim under the Inheritance (Provision for Family and Dependants) Act 1975 by a dependant who has been left out of the will or receives inadequate provision, a deed of variation can be used to settle the claim by agreement before proceedings are commenced, potentially saving significant legal costs.

When the beneficiaries wish to divide specific assets differently from the general distribution under the will, for example to enable one beneficiary to take the family home while others take the cash and investment assets, an inheritance agreement provides a clear written record of the arrangement.

A well-drafted Inheritance Agreement or Deed of Variation for use in England and Wales must address several key elements.

The identification of the deceased must be precise, including their full legal name, date of death, and last address. The document should state whether the deceased left a valid will and, if so, the date of the will, or whether the estate is subject to the intestacy rules.

All beneficiaries who are varying their entitlement must be identified precisely, with their full legal names, relationship to the deceased, and current addresses. The document must be signed by all affected beneficiaries. If any beneficiary lacks capacity or is under 18, specialist legal advice is essential because the court's involvement may be required.

The original entitlements of each beneficiary under the will or intestacy rules should be clearly recorded before the variation is set out. This provides a clear audit trail and helps to establish what is being varied.

The varied distribution must be set out clearly and unambiguously, specifying what each beneficiary will receive following the variation. This should cover all estate assets, including real property, bank accounts, investments, and personal effects. A schedule of personal property items can be included to allocate specific items to named beneficiaries.

Where the deed is intended to qualify for IHT write-back treatment under section 142 IHTA 1984, the document must contain the required election statement. This statement must be included in the deed itself and cannot be added later. The deed must be executed within two years of the date of death.

The governing law clause should confirm that the document is governed by the laws of England and Wales. A dispute resolution clause requiring mediation before court proceedings is advisable and demonstrates to a court (if the matter is ever litigated) that the parties acted reasonably. Independent legal and tax advice for each beneficiary significantly strengthens the document's enforceability and gives HMRC confidence that the variation was not entered into under duress.