An estate freeze does what it says. The current value of a company is fixed, or frozen, in the hands of the older generation, while everything the company grows into from that day on belongs to shares held by the next. Nothing is handed over except the future. The parents keep what they have built; the children own what it becomes.
Two numbers explain why the idea is being discussed again. Inheritance tax is charged at 40% on the part of an estate above the £325,000 nil-rate band, per GOV.UK's 2026-27 guidance. And from 6 April 2026, 100% business property relief is capped at the first £2.5m of qualifying business and agricultural property per person, under the reform GOV.UK announced in December 2025, with 50% relief above that. The Carry's reading is that the cap, far more than any fresh appetite for share-class engineering, is what put the word freeze back into adviser meeting notes this year.
A freeze does not shrink the estate. It stops it growing.
What is an estate freeze?
An estate freeze is a company-law arrangement, not a tax relief. There is no statutory scheme called a freeze, no HMRC form to file and no box on a tax return. A family simply reorganises a company's share capital so that its value today sits in one class of shares and its growth from today sits in another.
The class holding today's value, usually called freezer shares and typically built like preference shares, stays with the older generation. A new class, the growth shares, carries the right to everything the company becomes worth above the frozen figure, and those shares go to the children, or to a trust for them, while they are still worth very little. If the company doubles over the next decade, the whole of that doubling belongs to the growth shares. On paper, the parents' holding is worth what it was on the day of the freeze.
Because there is no statutory scheme, there is also no statutory protection. The arrangement rests on ordinary company law and general tax principles, so the valuation work matters as much as the share rights.
How is an estate freeze typically built?
Most UK freezes follow the same five steps, often inside a family investment company, a private company that holds a family's investment portfolio.
- Value the company at the freeze date. A defensible, professionally prepared valuation is the foundation. Every later argument with HMRC comes back to this number.
- Create the freezer shares. The existing ordinary shares are converted into, or exchanged for, a class with a fixed capital entitlement equal to that valuation. They often keep the voting rights, so the older generation stays in control.
- Issue the growth shares. A new class is created that shares only in value above the frozen amount, sometimes above a hurdle set slightly higher still.
- Put them in the right hands. The children subscribe for the growth shares at their market value, which should be modest if the hurdle is set properly, or a trust subscribes on their behalf.
- Paper everything. New articles of association, a shareholders' agreement, the valuation report and the tax filings. Thin paperwork is how freezes fail.
What does a freeze actually do for inheritance tax?
It caps the bill; it does not cancel it. The frozen value stays in the older generation's estate and is taxed at death in the normal way. Only the growth arising after the freeze date sits outside the estate, because it never belonged to the parents in the first place.
That distinction decides who the structure suits. It does little for a family whose wealth has already peaked. It can do a great deal where an asset is expected to multiply, since the growth accrues to the children from day one. An outright gift can achieve more, since the whole asset leaves the estate, but only if the giver survives seven years and only at the price of giving the asset itself away. A freeze asks for neither.
Business property relief changes the arithmetic for trading companies. Qualifying unquoted shares can still attract 100% relief within the capped £2.5m allowance, mechanics covered in our piece on the 2026 BPR cap. A family investment company rarely qualifies, because business relief on GOV.UK excludes companies mainly holding investments. That exclusion is why capping a FIC's growth appeals: if no relief will soften the estate, stopping it from getting bigger is the lever that remains.
Why does HMRC pay close attention to estate freezes?
Because a badly priced freeze is a disguised gift, and the rules that police value shifting are wide. Three risks come up in almost every professional review. All three are questions of fact rather than of rates, which is why no two freezes look quite alike.
Valuation risk comes first. If the growth shares are really worth more at issue than the children pay for them, perhaps because the hurdle was set too low or the company undervalued, the difference can be treated as a transfer of value by the parents, with consequences the freeze was designed to avoid.
Employment-related securities rules are the second. Where a recipient works for the company, even informally, shares acquired cheaply can be taxed as employment income rather than as a family matter. Family companies trip over this constantly, because adult children so often hold a directorship.
Settlements legislation is the third. Where an arrangement shifts income to a spouse or to minor children while the parent keeps an interest, HMRC can tax that income back on the parent. Dividend-paying growth shares held for young children are the classic pressure point.
None of this makes a freeze unworkable, but it does make the outcome fact-sensitive. The rules here are genuinely complex, the case law turns on detail, and specific professional advice is essential rather than merely sensible.
Which questions decide whether an estate freeze fits?
A framework, not a verdict. Whether a freeze belongs in a family's planning is a question for regulated advice; these are the questions an adviser will work through first.
- How much growth is actually ahead? A freeze only ever removes future growth from the estate. If the asset has matured, there is little left for it to do.
- Can the older generation live on the frozen value? They keep it, which is the structure's comfort, but it will not grow again. Long retirements need that tested.
- Who will hold the growth shares, and do they work in the business? The employment-related securities exposure turns on this single fact.
- Would a simpler route do the job? An outright gift with seven years' survival, or the ordinary post-exit planning in our founder's option map, may achieve enough without a share-class rebuild.
- Is the family ready for the running costs? Valuations, legal drafting and ongoing compliance are permanent features, not setup items.
This article is general information, not financial or tax advice, and an estate freeze is the kind of arrangement HMRC examines closely. Before restructuring anything, confirm the current rules in GOV.UK's inheritance-tax guidance and take advice from an FCA-regulated financial adviser together with a STEP-qualified solicitor who can see the whole picture.
Frequently asked questions
What is an estate freeze in the UK?
An estate freeze is a reorganisation of a company's share capital that fixes its current value in shares held by the older generation, while new growth shares entitled to all future increase in value are issued to the younger generation or a trust for them. It is built from ordinary company law rather than any statutory tax relief, so there is no HMRC scheme to apply for and no formal clearance that blesses the arrangement.
What are freezer shares?
Freezer shares are the class that holds the company's value as at the date of the freeze. They are usually structured like preference shares, with a fixed capital entitlement equal to a professional valuation of the company on that day, and they often keep the voting rights so the older generation stays in control. Their value is designed not to grow, which is the point: all growth accrues to the growth shares instead.
Do growth shares avoid inheritance tax?
Only on the growth. Value the company builds after the freeze accrues to the growth shares and never enters the older generation's estate, so it is not taxed there at death. The value frozen at the date of the arrangement stays in the estate and is charged to inheritance tax in the normal way. A freeze caps the taxable figure; it does not reduce it.
Is an estate freeze legal, and does HMRC challenge them?
Freezes use ordinary company law and are lawful, but they attract scrutiny. HMRC's recurring concerns are whether the growth shares were genuinely worth what was paid for them at issue, whether the employment-related securities rules apply because a shareholder works in the company, and whether the settlements legislation catches income shifted to a spouse or minor children. Careful valuation and documentation matter more than any single design choice.
Do I need professional advice before setting up an estate freeze?
Yes. This article is general information, not financial or tax advice. The rules touching freezes are complex, the outcome depends on facts specific to each family, and mistakes are expensive to unwind. Check the current inheritance-tax rules on GOV.UK and take advice from an FCA-regulated financial adviser together with a STEP-qualified solicitor before changing any share structure.