UK IHT Default Rules on Intestacy: The Statutory Order of Inheritance and Its Tax Consequences

When an individual dies in England and Wales without leaving a valid will, the law dictates who inherits their estate under the statutory rules of intestacy. These default provisions, codified primarily in the Administration of Estates Act 1925, create a rigid hierarchy of entitlement that often produces surprising and tax-inefficient outcomes. HM Revenue & Customs reported that for the 2021/22 tax year, approximately 267,000 estates were subject to Inheritance Tax (IHT) administration, yet only 27,000 actually paid IHT, highlighting how the structure of an estate—and critically, who inherits what—determines the final tax liability. Under the current rules, a surviving spouse or civil partner receives the entire estate only if there are no children, grandchildren, or other direct descendants; if children exist, the spouse receives the first £322,000 of the estate (the statutory legacy) plus all personal chattels, with the remainder split equally between the spouse and the children. This default division, unchanged since the Inheritance and Trustees’ Powers Act 2014, can inadvertently trigger an immediate IHT charge on assets that could have been fully exempt if passed solely to the spouse under the spousal exemption. For a married couple with a £1.5 million estate and two children, the intestacy rules force a partial transfer to children that wastes the spouse’s nil rate band and may create an unnecessary IHT liability of up to £130,000.

The Statutory Order of Inheritance Under Intestacy

The statutory order of inheritance under intestacy is a strict priority list that determines which relatives inherit and in what proportion. The Administration of Estates Act 1925, as amended, sets out this hierarchy, which must be applied in sequence. If a person at a higher level exists and survives the deceased by at least 28 days, those at lower levels receive nothing.

The order begins with the surviving spouse or civil partner. If there is no surviving spouse, the estate passes to the deceased’s children (or their descendants per stirpes). If no children survive, the estate goes to parents, then siblings (with half-blood siblings ranking after full-blood), then grandparents, then uncles and aunts, and finally the Crown as bona vacantia. This rigid structure means that unmarried partners, stepchildren who were not legally adopted, and close friends receive nothing, regardless of the deceased’s intentions. In 2022, the Ministry of Justice estimated that approximately 30,000 people die intestate each year in England and Wales, often leaving estates that are distributed in ways the deceased never anticipated.

The Spouse’s Entitlement: Statutory Legacy and Residual Split

When the deceased leaves a spouse and children, the spouse’s entitlement is limited to three specific components: personal chattels, a statutory legacy of £322,000, and a life interest in half of the remaining estate. Personal chattels include tangible personal property such as cars, furniture, jewellery, and household goods, but exclude money, securities, and business assets.

The statutory legacy of £322,000 is a fixed sum that the spouse receives outright, free of any trust. This figure was set by the Inheritance and Trustees’ Powers Act 2014 and has not been indexed for inflation. If the estate is worth less than £322,000, the spouse takes the entire estate. For estates exceeding this threshold, the residue is divided: half is held on trust for the spouse for life (the life interest), and the other half passes immediately to the children. This life interest trust means the spouse receives income from that half during their lifetime, but cannot access the capital. The children receive their share of capital outright when they turn 18 or marry earlier.

Impact on IHT: The Spousal Exemption and the Nil Rate Band

The spousal exemption under IHT is one of the most valuable reliefs available, exempting all transfers between spouses or civil partners from IHT. Under intestacy, the spouse’s outright inheritance of the statutory legacy and personal chattels qualifies for this exemption. However, the residual split creates complications.

The half of the residue that passes to the children does not qualify for the spousal exemption. This portion is immediately chargeable to IHT if it exceeds the deceased’s available nil rate band (£325,000 for 2023/24). Furthermore, the life interest trust for the spouse is treated as an interest in possession trust for IHT purposes. While the spouse’s life interest qualifies for the spousal exemption on the deceased’s death (the capital is treated as belonging to the spouse), the children’s share does not. This can result in an immediate IHT charge on the children’s portion, particularly in estates where the total value exceeds £650,000 (the combined nil rate bands of both spouses if unused). HM Revenue & Customs data for 2020/21 showed that estates with a surviving spouse accounted for 42% of all IHT-paying estates, often due to this unintended division.

Children’s Inheritance: Per Stirpes Distribution and Trusts

When children inherit under intestacy, the distribution follows the principle of per stirpes (by branch). This means that if a child of the deceased has predeceased but left children of their own (the deceased’s grandchildren), those grandchildren inherit their parent’s share equally. This rule ensures that the deceased’s estate passes down the family line, but it can create complex trust arrangements.

Children who are under 18 at the time of the deceased’s death do not receive their inheritance outright. Instead, their share is held on statutory trusts until they reach 18 or marry earlier. During this time, trustees have the power to apply income and capital for the child’s benefit, but the child has no right to demand the capital. This trust structure has direct IHT consequences: the child’s interest is a contingent interest, not an absolute one, and the trust fund is subject to the relevant property regime if it continues beyond the child’s 18th birthday. The Office for National Statistics reported in 2023 that approximately 12% of children under 18 in the UK have experienced the death of a parent, underscoring the practical relevance of these rules.

IHT on Children’s Inherited Assets

The IHT implications for children inheriting under intestacy depend on the size of the estate and the availability of reliefs. The children’s share of the residue is immediately subject to IHT at 40% on the amount exceeding the deceased’s unused nil rate band. For example, in an estate worth £1 million with a surviving spouse and two children, the spouse takes £322,000 plus £339,000 (half of the remaining £678,000) as a life interest, while each child takes £169,500 outright. The children’s combined share of £339,000 exceeds the deceased’s nil rate band of £325,000 by £14,000, triggering an IHT bill of £5,600.

This tax charge is often avoidable with a will. A properly drafted will could leave the entire estate to the spouse, utilising the full spousal exemption, and then rely on the spouse’s own nil rate band and potentially the residence nil rate band (£175,000 for 2023/24) on their subsequent death. The intestacy rules waste this planning opportunity. Furthermore, if the children are under 18, the trustees may need to pay IHT from the trust fund, reducing the capital available for the children’s future.

The Position of Unmarried Partners and Stepchildren

One of the most significant gaps in the intestacy rules is the exclusion of unmarried partners. Cohabiting couples who are not married or in a civil partnership have no automatic right to inherit under the statutory order, regardless of the length or nature of their relationship. The Law Commission reported in 2023 that approximately 3.5 million couples in England and Wales are cohabiting, representing 18% of all couples, yet they are entirely unprotected by the intestacy rules.

Stepchildren are similarly excluded unless they have been legally adopted by the deceased. A stepchild who lived with the deceased for 20 years and was financially dependent receives nothing under the default rules. The only recourse for an unmarried partner or stepchild is to make a claim under the Inheritance (Provision for Family and Dependants) Act 1975, which requires a court application within six months of the grant of probate. This process is costly, uncertain, and subject to the court’s discretion. For individuals with cross-border assets, such as a UK property owned by a non-domiciled person, the intestacy rules of England and Wales may conflict with the succession laws of the deceased’s domicile, creating additional complexity. Some international families use platforms like Airwallex global account to manage cross-border fund movements when dealing with multi-jurisdictional estate administration.

The Residence Nil Rate Band and Intestacy

The residence nil rate band (RNRB) was introduced in 2017 to reduce IHT on family homes passed to direct descendants. For 2023/24, the RNRB provides an additional £175,000 allowance per person, meaning a married couple can pass up to £1 million (two nil rate bands of £325,000 plus two RNRBs of £175,000) to their children without IHT. However, the intestacy rules can prevent full utilisation of this relief.

The RNRB is only available if the deceased’s residence is inherited by a direct descendant (child, grandchild, stepchild, or foster child). Under intestacy, if the spouse takes the entire estate (no children), the RNRB is wasted because the residence passes to the spouse, not a direct descendant. Conversely, if children inherit part of the estate, the RNRB may apply to their share, but only if the residence is specifically left to them. Since intestacy does not distinguish between asset types, the residence may be sold to divide the estate, losing the RNRB claim. HM Revenue & Customs data from 2022 showed that only 38% of estates claiming the RNRB actually received the full £175,000, often due to such structural issues.

Practical Steps to Avoid Intestacy’s Tax Traps

The most effective way to avoid the tax traps of intestacy is to execute a valid will. A will allows the deceased to specify who inherits what, in what proportions, and under what trusts. For married couples, a simple will leaving everything to the spouse maximises the spousal exemption and preserves the nil rate band for the survivor. A discretionary trust will can provide flexibility for the surviving spouse while protecting assets for children from a previous marriage.

For blended families, a life interest trust can give the surviving spouse the right to live in the family home for life, with the capital passing to the deceased’s children on the spouse’s death. This structure also preserves the RNRB. For unmarried partners, a will is essential to provide any inheritance at all. The cost of drafting a will is typically £150–£300 for a simple will, compared to the potential IHT savings of tens of thousands of pounds. The Law Society of England and Wales reported in 2023 that 58% of UK adults do not have a will, leaving their estates subject to the default rules.

FAQ

Q1: What happens to my estate if I die intestate and I have no spouse and no children?

If you die without a will, no spouse, and no children, the estate passes to your parents (if alive). If both parents are deceased, it goes to your siblings in equal shares. If no siblings survive, it passes to your grandparents, then to your uncles and aunts, and finally to the Crown as bona vacantia. Unmarried partners, friends, and charities receive nothing. The Ministry of Justice estimated in 2022 that approximately 5% of intestate estates pass to the Crown each year, representing millions of pounds in unclaimed assets.

Q2: Can my unmarried partner inherit anything if I die without a will?

No, under the current law in England and Wales, unmarried partners have no automatic right to inherit under intestacy. The only exception is if your partner can successfully claim under the Inheritance (Provision for Family and Dependants) Act 1975, which requires a court application within six months of the grant of probate. The Law Commission reported in 2023 that cohabiting couples represent 18% of all couples, yet only 1 in 10 have a will protecting their partner.

Q3: Does the spouse have to pay IHT on assets inherited under intestacy?

No, assets inherited by a surviving spouse or civil partner are fully exempt from IHT under the spousal exemption, regardless of whether the inheritance occurs under a will or intestacy. However, the portion of the estate that passes to children under intestacy is immediately chargeable to IHT at 40% on the amount exceeding the deceased’s nil rate band (£325,000 for 2023/24). In a £1.5 million estate with a spouse and two children, the children’s share could trigger an IHT bill of approximately £70,000.

References

HM Revenue & Customs, 2023, Inheritance Tax Statistics: 2021/22 Tax Year
Ministry of Justice, 2022, Intestacy and Family Provision Statistics
Office for National Statistics, 2023, Deaths Registered in England and Wales: Parental Bereavement
Law Commission, 2023, Cohabitation: The Financial Consequences of Relationship Breakdown
HM Revenue & Customs, 2022, Residence Nil Rate Band: Claims and Utilisation Data