Most people assume that once someone has died, their Will is fixed and final. In most cases that is true, and it should be — a properly drafted Will is meant to be the last word on how an estate is shared out. But UK law does allow for one important exception. Within certain limits, the beneficiaries of an estate can agree, after death, to redirect some or all of an inheritance to someone else. This legal tool is called a Deed of Variation, and it is worth understanding, even though it should never be treated as a substitute for good planning during your lifetime.
What a Deed of Variation Actually Does
A Deed of Variation is a legal document signed by a beneficiary (or beneficiaries) of an estate, changing who receives some or all of what they were left, either under a Will or under the intestacy rules if there was no Will at all. It does not rewrite the deceased’s Will. Instead, it allows the people who were due to inherit to voluntarily give up some or all of their entitlement in favour of someone else, and — crucially — for tax purposes, HM Revenue & Customs will treat that redirection as though the deceased had left it that way in the first place.
This “reading back” effect is what makes a Deed of Variation genuinely useful, rather than simply a gift from one person to another after the fact. Ordinarily, if you inherited money and then gave it away, that gift would be treated as coming from you, with your own tax consequences attached. A valid Deed of Variation sidesteps that by treating the new beneficiary as having inherited directly from the deceased.
The Two-Year Window
A Deed of Variation must be made within two years of the date of death. This is not a guideline — it is a strict legal time limit for the variation to have effect for Inheritance Tax and Capital Gains Tax purposes. Miss the window, and any redirection of assets will simply be treated as a lifetime gift from the original beneficiary, bringing their own tax position into play, including the seven-year rule if Inheritance Tax is a concern later on.
Within that two-year window, there is no requirement to wait for the estate to be fully wound up. Deeds of Variation are often put in place once it becomes clear during the administration of the estate that a change would benefit the family, and before final distributions are made.
Who Has to Agree
This is where many families come unstuck. Every beneficiary whose entitlement is being reduced by the variation must agree to it and sign the deed. If an estate is left equally to three siblings and one wants to redirect their share to their own children, that sibling can generally do so unilaterally, because they are only giving up something that was theirs. But if the variation affects what someone else was due to receive, that person must consent too.
This is also why a Deed of Variation cannot be used to benefit a minor at someone else’s expense, or where a beneficiary lacks the mental capacity to agree. Redirecting an inheritance away from a child under eighteen, or from an adult who cannot legally consent, generally requires the court’s involvement, because these people cannot give up an entitlement on their own behalf. In practice, this rules out a Deed of Variation as a solution in many of the situations where families most want flexibility.
Why Families Use Them
There are several common, legitimate reasons a family might choose to use a Deed of Variation:
- Redirecting to grandchildren. An adult child who does not need their inheritance may prefer to pass it directly to their own children, skipping a generation and, where appropriate, reducing the overall Inheritance Tax exposure across the family.
- Equalising between siblings. Where a Will treats children unevenly, perhaps for reasons that no longer make sense, the beneficiaries can agree between themselves to even things out.
- Charitable giving. Beneficiaries can direct part of an inheritance to a charity. Depending on how much of the estate passes to charity, this can also reduce the rate of Inheritance Tax paid on the remainder of the estate.
- Correcting an out-of-date Will. Sometimes a Will simply no longer reflects the family’s circumstances or wishes — perhaps it was written decades earlier and never updated. A Deed of Variation can, within limits, allow beneficiaries to correct for this after the fact.
How the Tax Reading-Back Works
For Inheritance Tax purposes, a valid Deed of Variation is read back to the date of death, so the redirected assets are treated as having passed directly from the deceased to the new beneficiary. This matters most when the variation redirects assets to a charity, to a spouse, or skips a generation to reduce the size of an estate that would otherwise be taxed twice — once on the first death and again when the original beneficiary later dies.
The same reading-back treatment can apply for Capital Gains Tax, meaning the new beneficiary’s base cost for any asset is set at its value on the date of death, rather than at the date of the variation. Both the Inheritance Tax and Capital Gains Tax treatment require the deed to state clearly that it is intended to take effect under the relevant tax legislation, so the drafting matters. A poorly worded deed can fail to secure this treatment even if everyone signs it in good faith.
When a Deed of Variation Cannot Be Used
There are firm limits worth knowing before assuming this is always an option:
- Minors and those lacking capacity. As noted above, an entitlement due to a child or a person without mental capacity cannot simply be signed away by someone else. Court approval is generally required, and it is not guaranteed.
- Lack of consent. If even one affected beneficiary refuses to agree, the variation cannot proceed in respect of their share.
- Already-distributed estates. Once assets have been fully distributed and, in some cases, spent or reinvested by the beneficiary, a variation becomes far harder to achieve in a way that is clean for tax purposes, even if still technically within the two-year window.
- Missing the two-year deadline. As above, this is an absolute cut-off for the special tax treatment.
Why a Deed of Variation Is a Poor Substitute for Proper Planning
It is tempting to think that because Deeds of Variation exist, a Will does not need to be quite right — that the family can simply tidy things up afterwards if needed. In practice, this is a risky assumption for several reasons.
First, a Deed of Variation only works if every affected beneficiary agrees. Grief, family tension, and differing financial circumstances can make unanimous agreement far harder to achieve than people expect, particularly under the two-year time pressure. Second, it cannot help at all where a minor or a person lacking capacity is involved, which rules it out in exactly the situations where an out-of-date Will causes the most harm. Third, it depends entirely on careful legal drafting to secure the tax treatment families are relying on — an informally worded family agreement will not automatically qualify.
A Deed of Variation is best understood as a safety net for genuinely unforeseen circumstances, or a tool used deliberately as part of wider estate administration — not as a reason to delay updating a Will that no longer reflects your wishes. If your Will was written some years ago, if your family circumstances have changed, or if you are unsure whether your current arrangements still make sense, the more reliable route is to review and update your Will now, while you are able to make your own decisions clearly and without needing anyone else’s consent.
It is also worth remembering that a Deed of Variation only ever deals with what a Will, or the intestacy rules, already set out. It cannot create new gifts out of nothing, appoint guardians for children, set up ongoing trusts for vulnerable beneficiaries, or address the many other details that a well-considered Will can handle from the outset. Families sometimes discover, part-way through trying to use one, that what they actually need is a wider conversation about how the estate should have been structured in the first place — by which point it is too late to change anything other than redistribute what is already there.
There is also a practical cost to relying on this route. Drafting a Deed of Variation correctly, so that it secures the intended tax treatment and stands up to scrutiny, takes proper legal advice and time — often at a point when the family is still dealing with grief, probate paperwork, and the practical business of administering an estate. Compare that to the cost and effort of reviewing a Will every few years, or after a significant life event such as a marriage, divorce, birth, or a change in the value of your estate. The latter is almost always simpler, cheaper, and far less stressful for the people you leave behind.
If you would like to talk through whether your current Will still reflects your wishes, a Discovery Call with Legacy Wills is a straightforward way to start that conversation.