Partial Intestacy UK: What Happens When Your Will Doesn't Cover Everything

Updated: 16 May 2026 • Reading time: 7 min

Writing a will is not a one-time exercise. Estates change, beneficiaries die before the testator, and assets are acquired that were never contemplated when the will was first made. When a will fails to cover part of the estate — through a missing residuary clause, a lapsed gift, or an inadvertent gap — the intestacy rules step in for that portion. This is partial intestacy, and it can produce outcomes entirely at odds with the testator’s intentions.

What Is Partial Intestacy?

A person dies in partial intestacy when they leave a valid will that successfully disposes of some, but not all, of their estate. The will is not invalid — it takes effect for the property it covers. But any property not disposed of by the will falls to the intestacy rules under the Administration of Estates Act 1925, just as if no will existed for that part.

This creates a split outcome: the will governs its own provisions, while the intestacy rules govern the remainder. The intestacy rules may then distribute the undisposed property to people the testator would not have chosen, or in proportions that upset the intended balance of the estate.

Common Causes of Partial Intestacy

1. No Residuary Clause

The most avoidable cause. A will that makes only specific gifts (“I give my car to my son and my jewellery to my daughter”) with no residuary clause leaves everything else — bank balances, investment accounts, any other personal property — undisposed of. All of it falls to intestacy.

2. Lapse of a Gift

If a beneficiary named in the will dies before the testator, their gift lapses — it fails. Under s.33 Wills Act 1837, gifts to a child or remoter descendant who leaves descendants of their own are saved from lapsing (the gift passes to the beneficiary’s children). But for all other beneficiaries — siblings, friends, unrelated persons — a lapsed gift falls into the residue if there is a residuary clause, or into intestacy if there is no residue or the residuary clause also fails.

3. Residuary Clause Failing

Even a well-drafted residuary clause can fail if all the named residuary beneficiaries predecease the testator and no substitute beneficiaries are named. When the residuary clause fails entirely, the entire residue — which may include the bulk of the estate — falls to intestacy.

4. Assets Acquired After the Will Was Made

A will speaks from the date of death, not the date of execution — so property owned at death is covered by its provisions. However, if the will contains only specific gifts and a subsequently acquired major asset (an inheritance, a pension lump sum, the proceeds of a business sale) does not fit within any gift, and there is no residuary clause, that asset falls to intestacy.

The Intestacy Rules on a Partial Intestacy

The undisposed property passes under the Administration of Estates Act 1925 in the same order of priority as on a full intestacy:

1. Surviving spouse or civil partner — receives the personal chattels, the statutory legacy (£322,000 from July 2023), and half the remaining undisposed property
2. Children (or their descendants) — share the other half of the remainder with a surviving spouse; take all if no spouse survives
3. Parents
4. Siblings of the whole blood (or their children if they predeceased)
5. Half-siblings and their descendants
6. Grandparents
7. Aunts and uncles (whole blood), then half blood
8. The Crown (bona vacantia) — if no relatives

Cohabiting partners who are not married or in a civil partnership inherit nothing under the intestacy rules, regardless of the length of the relationship. If the testator intended their partner to receive the undisposed property, a partial intestacy defeats that entirely.

The Spouse’s Position on a Partial Intestacy

The interplay between a spouse’s entitlement under the will and their intestacy rights can be complex. Where a spouse receives substantial gifts under the will but a partial intestacy also arises, they are entitled to the statutory legacy from the undisposed portion — but may be required to elect between conflicting entitlements. This can produce counter-intuitive results and is an area where legal advice is particularly valuable.

The Residuary Clause: The Essential Prevention

A residuary clause — sometimes called a “sweeper” or “catch-all” clause — disposes of “all the rest and remainder” of the estate not covered by specific gifts. It is the single most important structural element of a well-drafted will. A robust residuary clause:

• Catches any asset inadvertently omitted from specific gifts
• Absorbs lapsed specific gifts (where no s.33 WA 1837 substitution applies)
• Covers assets acquired after the will is executed
• Names one or more substitute residuary beneficiaries in case the primary residuary beneficiary predeceases

WillSafe templates include a residuary clause as a standard provision, with guidance on naming primary and substitute beneficiaries to guard against lapse.

Remedies After Partial Intestacy

If a partial intestacy has already arisen on death, the intestacy outcome can sometimes be corrected retrospectively using a deed of variation (within two years of death), in which the intestacy beneficiaries redirect their entitlement to the persons the deceased intended. The deed can attract HMRC read-back for inheritance tax and CGT if properly executed. However, all intestacy beneficiaries must agree — if any are minors or persons under a disability, court approval is required.

Frequently Asked Questions