A Statutory Declaration of Domicile is a formal legal document in which a person (the declarant) solemnly and sincerely declares facts concerning the domicile of themselves or a deceased person to be true. It is made before a person authorised by law to administer oaths in England and Wales — typically a solicitor, commissioner for oaths, or notary public — and is governed by the Statutory Declarations Act 1835, the Domicile and Matrimonial Proceedings Act 1973, and the Oaths Act 1978.

Domicile is a fundamental concept in English private international law. Every person has one and only one domicile at any given time, and it determines which country's law governs their personal affairs — including the distribution of their estate on death, the validity of their marriage, and certain tax obligations. Domicile is distinct from nationality (the country of which a person is a citizen), ordinary residence (where a person habitually lives), and tax residence (a separate concept used by HMRC for income tax purposes).

The concept of domicile is particularly important in the context of inheritance tax under the Inheritance Tax Act 1984. A person domiciled in England and Wales at the date of their death is subject to inheritance tax on their worldwide assets (subject to available reliefs and exemptions), whereas a person domiciled outside the United Kingdom is generally only subject to inheritance tax on their UK assets. This difference can result in significantly different tax outcomes for estates of similar size, making the domicile determination critically important for estate planning and administration.

A Statutory Declaration of Domicile provides formal evidence of a person's domicile for HMRC, the Probate Registry, foreign courts and authorities, and other official bodies. It addresses both the domicile of origin (acquired at birth) and the domicile of choice (acquired through residence and intention), setting out the factual basis for the domicile claimed.

A Statutory Declaration of Domicile is needed in England and Wales in a range of legal, tax, and administrative contexts where the formal establishment of a person's domicile is required by HMRC, a court, a financial institution, or a foreign authority.

Inheritance tax and HMRC: The most common context in which a Statutory Declaration of Domicile is required is in connection with an inheritance tax return following a death. The executor or administrator must complete form IHT400 and establish the deceased's domicile, as this determines whether the worldwide estate or only the UK estate is subject to inheritance tax. Where the deceased was not domiciled in England and Wales (or was not 'deemed domiciled' under the Inheritance Tax Act 1984), a Statutory Declaration of Domicile is typically submitted to HMRC as part of the inheritance tax return to support the claim to non-UK domicile status.

Probate proceedings: The law governing succession to a deceased person's moveable property (as opposed to land) is determined by the law of the country of domicile. The Probate Registry may require evidence of domicile where the deceased's domicile is not straightforward — for example, where the deceased was born abroad and later came to live in England, or where they maintained homes in multiple countries.

Matrimonial proceedings: Under the Domicile and Matrimonial Proceedings Act 1973, the courts of England and Wales have jurisdiction to hear matrimonial proceedings (including divorce) where at least one party is domiciled in England and Wales. A Statutory Declaration of Domicile may be required to establish the court's jurisdiction.

Foreign assets and financial institutions: Where a deceased person held assets (including bank accounts, investments, or property) in a foreign country, the foreign financial institution or authority may require a formal declaration of domicile before releasing or transferring those assets. Double taxation treaties between the UK and other countries frequently use domicile as a determining factor.

A properly drafted Statutory Declaration of Domicile for England and Wales must address several key legal and factual elements that are required by the Statutory Declarations Act 1835 and by the legal principles governing domicile in English private international law.

The identity of the declarant must be clearly stated. Where the declaration concerns the declarant's own domicile, the declarant provides their full name, address, occupation, and nationality. Where the declaration concerns a deceased person's domicile, the declarant must additionally state their legal capacity — for example, as executor or personal representative — and their personal knowledge of the deceased's circumstances.

The domicile of origin must be identified. The declaration must state the country of domicile of origin — typically the country in which the father was domiciled at the time of the subject's birth (for persons born in wedlock) — and set out the factual basis for this claim. The domicile of origin is important because it is the 'default' domicile that applies whenever a domicile of choice is not established or is abandoned.

The domicile of choice and evidence of intention must be addressed in detail. Where a domicile of choice in England and Wales is claimed, the declaration must identify the date from which continuous residence in England and Wales commenced, and must set out the objective evidence supporting the intention to reside permanently or indefinitely. This evidence typically includes: ownership of residential property in England; registration with UK healthcare and official services; continuous payment of UK taxes; making an English will; and absence of any intention to return permanently to the country of domicile of origin.

For deceased persons, the date and place of death must be stated. The declaration must also address any change in domicile during the deceased's lifetime, particularly in the final years of life.

The statutory formula and perjury warning required by the Statutory Declarations Act 1835 must appear in the declaration, together with the execution clause recording where and before whom the declaration was made.