Siblings’ Inheritance Rights UK (2026): Do Brothers & Sisters Inherit?

Not automatically — siblings only inherit if certain closer relatives do not survive the deceased. Under the Administration of Estates Act 1925 intestacy rules, siblings of the whole blood inherit third in the statutory order (after the spouse or civil partner and children/grandchildren, and after parents). If the deceased had a surviving spouse or civil partner, children, or grandchildren, siblings receive nothing under intestacy. If no spouse, children, or grandchildren survive, parents are looked at next — if a parent survives, parents inherit in full and siblings again receive nothing. Only if no spouse, children, grandchildren, or parents survive do siblings inherit.

If siblings are the closest surviving relatives (no spouse/civil partner, children/grandchildren, or parents survive), the whole estate passes to the siblings in equal shares. If there are, for example, three siblings of the whole blood, each receives one third. There is no fixed monetary cap — siblings take the entire estate in equal shares. If one sibling has predeceased the deceased but left children, those children take their parent's share by substitution (per stirpes) — each of the deceased sibling's children shares equally in what their parent would have received. If only one sibling survives (with no predeceased siblings leaving children), that sibling inherits the entire estate.

The intestacy rules distinguish between siblings of the whole blood (who share both parents with the deceased) and siblings of the half blood (who share only one parent — typically half-brothers and half-sisters from a parent's second relationship). Siblings of the whole blood inherit third in the statutory order. Siblings of the half blood inherit fourth — they are a separate, lower category. If the deceased has both full siblings and half siblings, full siblings inherit first and half siblings receive nothing. Half siblings only inherit if there are no surviving full siblings (or children of predeceased full siblings). However, under a will, you can treat full and half siblings identically — the whole blood/half blood distinction only applies under intestacy.

Yes — under the intestacy rules, the children of a predeceased sibling step into their parent's place by substitution. This is called the per stirpes rule. Example: the deceased had three siblings (A, B, and C). B died before the deceased, leaving two children. A and C are alive. The estate is divided into three equal portions — A and C each receive one third, and B's two children share B's one third (each receiving one sixth). Substitution applies at one generation only for siblings — grandchildren of predeceased siblings do not substitute automatically under current intestacy rules. For more than one generation of substitution, a will is needed.

No — under current intestacy rules (as reformed in 2014), if there is a surviving spouse or civil partner and no children, the entire estate passes to the spouse outright. Siblings inherit nothing, regardless of how close the relationship. This has been the position since the Inheritance and Trustees' Powers Act 2014 removed the old partial entitlement of parents and siblings when a surviving spouse was present. If you want siblings to receive something alongside a spouse, a will is the only way to achieve this.

No automatic rights. Unlike a spouse, civil partner, or child, a sibling has no statutory entitlement to claim from the estate under the Inheritance (Provision for Family and Dependants) Act 1975 unless they were being financially maintained by the deceased immediately before the death. A sibling who was wholly or partly dependent on the deceased can make a limited 1975 Act claim, but only for 'reasonable financial provision' measured at a lower (maintenance) standard than for spouses or children, and they must show genuine financial dependency, not merely a close relationship. If a sibling is left out of a will entirely and was not financially dependent on the deceased, they have no legal basis to challenge the will simply because they were excluded.

A will entirely overrides the intestacy rules. You can leave your estate — or any portion of it — to siblings, regardless of whether they would inherit under intestacy. Equally, you can deliberately exclude a sibling (subject to the very limited 1975 Act dependency claim above). In a will you can: leave equal shares to all siblings; favour particular siblings over others; include half siblings on the same basis as full siblings; leave legacies to siblings' children; or exclude all siblings and leave the estate to friends or charities. The will controls outcome entirely. Dying without a will is the most common reason siblings unexpectedly miss out — particularly when the deceased is married.