UKMy stepchildren want to challenge their stepparent's will. Can they?
Yes, stepchildren in the UK may be able to challenge their stepparent's will under the Inheritance (Provision for Family and Dependants) Act 1975 — but only if they were treated as a child of the family by the stepparent and were financially dependent on them.
What the Law Says
The Inheritance (Provision for Family and Dependants) Act 1975 allows certain people — including some stepchildren — to apply to court for reasonable financial provision from a deceased person’s estate if the will or intestacy rules do not make adequate provision for them.
Stepchildren are not automatically entitled to challenge a will. However, section 1(1)(d) of the Act includes 'any person who… was treated by the deceased as a child of his family' — this can include stepchildren, provided they were treated as a child of the family by the stepparent (not just the biological parent).
Crucially, being a stepchild alone is not enough. The court looks at the nature and extent of the relationship: did the stepparent assume parental responsibilities? Did the stepchild live with them? Was there emotional or financial support akin to a parent–child relationship?
The application must be made within six months of the grant of representation (e.g., probate), unless the court grants permission to apply out of time.
Statutory Textany person who… was treated by the deceased as a child of his family
— Inheritance (Provision for Family and Dependants) Act 1975, s. 1(1)(d) — Persons who may apply for provision
Sources
Not legal advice. This article is general information based on publicly available sources, written for educational purposes. Laws change and individual situations vary. Consult a licensed attorney in your jurisdiction before acting on anything you read here. Last reviewed: 2026-06-08.