Severing a Joint Tenancy for Inheritance Tax Planning: 2026/27 Rules
Severing a joint tenancy converts automatic survivorship into a specific, separately owned share that can pass via your will — a common Inheritance Tax planning step. How it works in 2026/27.
Quick answer
Severing a joint tenancy is a purely legal reshuffling of how a property is co-owned, converting automatic survivorship into individually owned, separately inheritable shares — a common and generally low-cost first step in Inheritance Tax and estate planning for couples who want more control over where their share of the family home eventually goes.
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Inheritance tax calculatorJoint tenants vs tenants in common
Under a joint tenancy, co-owners collectively own the whole property, and on the death of one, their interest passes automatically to the surviving owner(s) by survivorship — regardless of what their will says, because there's no separate "share" to leave. Under a tenancy in common, each owner has a defined, separate share (which can be unequal, for example 60/40), and that specific share passes according to their will or the intestacy rules if they don't have one — it does not automatically go to the co-owner.
Why couples sever for IHT planning
A common scenario: a couple wants each partner's share of the family home to pass into a trust for children (perhaps from an earlier relationship) rather than automatically to the surviving spouse, in order to use each partner's nil-rate band and residence nil-rate band more effectively across both deaths, rather than everything landing in the survivor's estate and only being taxed once, at the second death, against a single set of allowances. Severing the joint tenancy is the necessary first step, since you can't leave a specific share to someone else under a joint tenancy — there's no separate share to give.
uk-inheritance-tax-planning-guide-2026No immediate CGT or SDLT charge
Severance itself is simply a change in the legal basis of co-ownership — from joint tenancy to tenancy in common in the same proportions — rather than a disposal of an asset or acquisition of a new one, so it generally doesn't trigger Capital Gains Tax or Stamp Duty Land Tax by itself.
How to actually sever
In England and Wales, severance can be done unilaterally by one owner serving formal written notice on the other, or by mutual agreement, and is registered with HM Land Registry to update the title. It's a relatively simple, inexpensive legal step compared with the estate-planning decisions it enables.
Don't forget the will
Severing only creates the possibility of leaving your share to someone specific — it doesn't do that automatically. Without an up-to-date will specifying who inherits your particular share, intestacy rules would determine what happens to it, which may not achieve the planning outcome that motivated the severance in the first place.
Bottom line
Severing a joint tenancy is a low-cost, reversible-in-structure (though the timing of death isn't) legal step that opens up more flexible Inheritance Tax planning — but it only works alongside a properly drafted, up-to-date will.
Sources
- GOV.UK: Joint property ownership
- HM Land Registry: Severance of joint tenancy
Frequently asked questions
What's the difference between joint tenants and tenants in common?
Joint tenants each own the whole property together, with automatic survivorship — when one dies, their share passes automatically to the surviving owner(s), regardless of what their will says. Tenants in common each own a specific, separate share, which passes according to their will (or intestacy rules) rather than automatically to the co-owner.
Why would I sever a joint tenancy for Inheritance Tax planning?
Severing lets each owner leave their specific share of the property to someone other than the automatic survivor — for example, to use the residence nil-rate band or nil-rate band more effectively, or to pass a share into a trust for children from a previous relationship, rather than everything automatically going to a surviving spouse.
Does severing a joint tenancy trigger a Capital Gains Tax or Stamp Duty charge?
Generally no — severing simply changes the legal basis of co-ownership from joint tenancy to tenancy in common in the same shares, without a disposal or acquisition taking place, so it doesn't typically trigger CGT or SDLT by itself.
Can I sever a joint tenancy without my co-owner's agreement?
Yes — in England and Wales, one joint tenant can unilaterally sever the joint tenancy by serving a formal notice on the other owner(s), without needing their agreement, converting the ownership to tenants in common from that point.
Do I need to update my will after severing a joint tenancy?
Yes — severing only changes how the property is held; it doesn't itself direct where your share goes on death. You need a valid will (or your share falls under intestacy rules) specifying who inherits your particular share of the property.
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