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Siblings reach the front of the inheritance queue only when several layers of closer relatives are absent: no spouse or civil partner, no children or grandchildren, and no surviving parents. When that combination occurs, brothers and sisters inherit the estate equally. This guide explains exactly how the rules work and what siblings need to do to administer the estate.
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Under the Administration of Estates Act 1925, the intestacy priority order is:
Siblings reach position 4 — they only inherit when positions 1–3 are all empty. This means the deceased must have:
When siblings do inherit, whole blood siblings (who share both parents with the deceased) have priority over half-blood siblings (who share only one parent). Half-blood siblings only inherit if there are no whole blood siblings at all.
For the full intestacy overview, see our main intestacy guide.
Whole blood siblings share both biological parents with the deceased. They inherit equally and take priority over half-blood siblings.
Half-blood siblings share only one biological parent (for example, children from the same mother but a different father, or vice versa). They inherit only if there are no whole blood siblings, in which case they share equally.
This distinction can be significant in families with step-siblings or half-siblings. Only biological half-siblings (sharing a biological parent) are half-blood siblings for the purposes of intestacy. Step-siblings (whose connection to the deceased is only through their parents' marriage, without any shared biological parent) do not inherit under intestacy.
If a sibling predeceased the deceased but left their own children, those children (nieces and nephews of the deceased) inherit the sibling's share by representation. This is the same per stirpes principle that applies with children and grandchildren.
Example: The deceased has three siblings, A, B, and C. C has predeceased but left two children (X and Y). A receives one-third, B receives one-third, X and Y each receive one-sixth (sharing C's one-third).
The siblings (if aged 18 or over) have the right to apply for letters of administration. Any adult sibling can apply — the Probate Registry prefers up to four co-administrators, but a single sibling can act alone with the consent of the others.
The administrator will need to demonstrate the family structure to the Probate Registry — proving there is no surviving spouse, children, or parents. This may require obtaining death certificates for any deceased relatives who would otherwise have had priority.
The process of administering the estate is the same regardless of who acts as administrator. See our guide to applying for letters of administration and our complete UK probate guide.
If the deceased owned their home solely, it forms part of the estate and is distributed among the siblings. If there were multiple siblings and no agreement about the property, any one of them could apply to court for an order for sale.
If the deceased co-owned with someone outside the family (a former partner, a friend) as tenants in common, only the deceased's share forms part of the estate. If held as joint tenants, the property passes by survivorship to the surviving co-owner.
Joint bank accounts pass by survivorship to the surviving joint account holder. Any assets solely held by the deceased form part of the estate.
Life insurance policies written in trust pass directly to named beneficiaries outside the estate. Pension death benefits are discretionary — if there is no spouse or children, the pension trustees may choose to pay siblings or to the estate.
A cohabiting partner who was financially dependent on the deceased and who lived with the deceased for at least two years may bring a claim under the Inheritance (Provision for Family and Dependants) Act 1975. Such claims must be brought within six months of letters of administration being granted.
Other potential 1975 Act claimants include financially dependent former spouses and any person the deceased was maintaining financially. Siblings who are benefiting may wish to seek legal advice before distributing the estate if they are aware of potential claimants.
Without a surviving spouse, the full inheritance tax nil-rate band applies (£325,000 for 2026–27). The residence nil-rate band may also apply where the home passes to direct descendants — but in a siblings-only scenario, siblings are not direct descendants, so the residence nil-rate band does not apply.
This means that estates above £325,000 left to siblings are subject to inheritance tax at 40% on the amount above the threshold, which can be significant. See our inheritance tax guide for 2026–27.
When someone dies without a will, no spouse, and no children, their parents inherit the entire estate equally. UK intestacy rules for parents as next of kin explained.
If you die married with no children and no will, your spouse inherits your entire estate. How the intestacy rules work, what documents are needed, and next steps.
Married with children and no will? Your spouse gets £322,000 plus personal chattels plus half the remainder. Children share the other half. Full UK intestacy rules explained.
Unmarried partners have no automatic inheritance rights under UK intestacy law — regardless of relationship length. What happens to the estate, and what you can do.
Long-term cohabiting partners have no automatic inheritance rights in England and Wales. What the law says, what you can claim, and how to protect your partner.
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