IHT on Unlisted Shares UK: Inheritance Tax on Private Company Shares and Unquoted Shareholdings (2026)
Private company shares are included in the IHT estate at their open market value — valued by HMRC SAV using earnings, dividend, or asset-based methods. Shares in qualifying unquoted trading companies attract 100% BPR under s105(1)(bb) IHTA 1984, subject to the £1m combined cap from April 2026.
| Type of Shareholding | BPR Available? | Notes |
|---|---|---|
| Unquoted shares in trading company | 100% | s105(1)(bb); 2yr ownership; £1m cap April 2026 |
| Unquoted shares in investment company | None | s105(3) — mainly investment = no BPR |
| Unquoted shares: mixed trade/investment | Partial / At risk | All-or-nothing test: trading must dominate >50% |
| AIM shares (trading company) | 100% | AIM = unquoted for BPR; same rules apply; £1m cap |
| Listed shares (main market) | None | Not unquoted — see listed shares IHT rules |
| Shares subject to binding sale contract | None | s113 IHTA 1984 — binding contract defeats BPR |
IHT on Private Company and Unlisted Shares
How unlisted shares are valued for IHT
All assets in a deceased's estate — including unlisted shares — must be valued at their open market value on the date of death (s160 IHTA 1984). For quoted shares, market value is straightforward: the lower of two quoted prices, or the quarter-up formula. For unlisted (unquoted) shares in a private company, there is no public market price. The open market value must be agreed with HMRC's Shares and Assets Valuation (SAV) team, using an approach appropriate to the nature of the company. HMRC SAV applies broadly three approaches depending on the company's characteristics: (1) Earnings-based (P/E multiple): appropriate for profitable trading companies. The maintainable earnings (typically an average of recent years) are multiplied by an appropriate price/earnings ratio, derived from comparable quoted companies with a discount for the lack of marketability of an unlisted share. (2) Dividend-based (dividend yield): appropriate for companies that pay regular dividends and where the shareholder is a minority (unable to control dividend policy). The dividend stream is capitalised at an appropriate yield. (3) Asset-based (net asset value): appropriate for investment holding companies or companies where assets (property, investments) drive the value. Net assets per share are adjusted for minority or majority status. In practice, HMRC may use a blended approach or apply the method that produces the highest defensible value.
Minority discounts on unlisted shares
A minority shareholding in an unlisted company is worth less than its pro-rata share of the total company value, because the minority holder has no control — they cannot force a dividend, force a sale, or direct management. HMRC and the courts accept minority discounts on unlisted shares where the holding is below the level that confers control (typically below 50% of voting rights). The size of the discount depends on the degree of minority: a 49% holding (close to control) attracts a smaller discount than a 10% holding (little influence). Typical minority discounts in practice range from 20% to 35%, though the facts of each case govern. Where the estate holds multiple blocks of shares (across family members, or via nominees) that could be aggregated to confer control, HMRC may resist the minority discount under the 'related property' rules (s161 IHTA 1984). The related property rules aggregate the deceased's shares with those of their spouse for valuation purposes — potentially eliminating the minority discount if the combined holding has a controlling interest. Professional valuation advice is essential for any significant unlisted shareholding.
BPR on unquoted trading company shares: s105(1)(bb) IHTA 1984
Shares in an unquoted company that carries on a qualifying trading business qualify for 100% BPR under s105(1)(bb) IHTA 1984. 'Unquoted' means not listed on a recognised stock exchange — this includes shares in private limited companies, LLPs, and companies listed only on AIM (which is not a recognised exchange for BPR purposes). The qualifying conditions for BPR on unquoted company shares are: (1) The company must carry on a qualifying trade — it must not be 'wholly or mainly' making or holding investments (s105(3)). A property investment company, a company holding investment portfolios, or a company that is mainly a holding company for investment assets will not qualify. (2) The shares must have been owned for at least two years immediately before death (s106). (3) The business must be a going concern — a company in administration or being wound up at death does not qualify. Where all conditions are met, 100% BPR reduces the IHT value of the shares to nil (subject to the £1m cap from April 2026).
The excepted assets trap in company valuations
Even where BPR is in principle available on unquoted trading company shares, the relief is reduced where the company holds 'excepted assets' — assets neither used in the business nor required for future use (s112 IHTA 1984). The most common excepted asset in a private company is cash held in excess of working capital requirements. If a company has £2m of trading assets and £1m in a bank account that represents accumulated profits beyond working capital needs, HMRC will apportion the share value — only the trading portion of the company's value attracts BPR. Excepted assets also include: investment properties held by the company not used in the trade; shares in other companies not part of the trading group; personal assets used by shareholders. The excepted assets issue often produces a higher IHT bill than expected on private company shares. Remedy: ensure the company does not hold excess cash beyond working capital; consider paying down excess cash as dividends; keep investment assets outside the trading company structure.
Cross-option agreements and shareholder buy-out on death
A common and practical solution to IHT on unlisted shares in a family or closely-held company is a cross-option agreement combined with life insurance. Under a cross-option agreement: on the death of a shareholder, the deceased's estate has the option to sell the shares to the surviving shareholders; the surviving shareholders have the option to buy the shares from the estate. This gives the estate the choice to sell (realising cash to pay IHT and beneficiaries) and the survivors the choice to buy (maintaining control of the company). Each option is exercisable independently — which avoids creating a binding contract to buy/sell that would potentially defeat BPR by treating the shares as subject to a binding contract for sale at death. The life insurance is typically taken out on the lives of each shareholder (with the other shareholders or a trust as beneficiaries) to fund the share purchase — providing the cash to pay the estate without needing to borrow or use company assets. The cross-option structure requires careful drafting to avoid inadvertently treating the options as a binding obligation and losing BPR.
The April 2026 BPR cap and planning for private company shareholders
From 6 April 2026, the Autumn Budget 2024 introduces a £1,000,000 combined cap on 100% BPR and APR per person (£2m for a married couple via the transferable equivalent). Above the cap, only 50% relief applies — an effective IHT rate of 20% on the excess. For a shareholder in a valuable private company, this is a significant change. A 30% stake in a company worth £5m — share value £1.5m — previously had no IHT (100% BPR). From April 2026: £1m at 100% BPR (nil IHT) + £500k at 50% BPR — 40% IHT on £250k = £100,000 tax. Planning: (1) Lifetime gift of shares as a PET — if the donor survives 7 years, the gift is fully exempt (BPR only applies if the recipient holds qualifying property at the donor's death, so ensure they do); (2) Share the equity with a spouse to use both £1m caps; (3) Life insurance in trust to fund the IHT liability above the cap; (4) Accelerate succession — gift shares to the next generation sooner rather than waiting.
Notifying HMRC and the IHT400 process for unlisted shares
Where the estate includes unlisted shares, the executor must report them in the IHT400 account using supplementary page IHT412 (unquoted shares and securities). The executor must submit a valuation of the shares. HMRC SAV will review all unlisted share valuations in estates where IHT is payable — and frequently in others. The process: (1) Executor obtains a specialist valuation (from an accountant, corporate finance firm, or specialist valuer) supporting an open market value at the date of death. (2) IHT400 + IHT412 submitted with the valuation. (3) HMRC SAV issues a preliminary valuation — this is their starting position, often higher than the executor's submission. (4) Negotiations follow — the parties exchange valuations and arguments until agreement is reached or a formal referral to the Tax Tribunal is made. For estate BPR claims, HMRC will separately review whether BPR conditions are met — requesting company accounts, trading records, and evidence of the business activity. Professional representation in SAV negotiations is strongly recommended where the share value is material.
Frequently Asked Questions
Are unlisted shares included in my estate for inheritance tax?
Yes. Unlisted (unquoted) shares in private companies are included in the IHT estate at their open market value on the date of death (s160 IHTA 1984). HMRC's Shares and Assets Valuation team will review the valuation. Where the shares qualify for Business Property Relief (BPR) under s105(1)(bb) IHTA 1984 — unquoted shares in a qualifying trading company — the IHT value can be reduced by 100% (subject to the £1m cap from April 2026).
How are private company shares valued for inheritance tax?
HMRC SAV values unlisted shares using: (1) an earnings-based approach (P/E multiple) for profitable trading companies; (2) a dividend yield approach for minority holdings in dividend-paying companies; (3) a net asset value approach for investment holding companies. A minority discount (typically 20–35%) is applied where the holding does not confer control. Related property rules (s161) may prevent a minority discount where the deceased's and spouse's shares together form a controlling interest.
Do private company shares qualify for Business Property Relief?
Shares in an unquoted company (not listed on a recognised stock exchange) that carries on a qualifying trade can qualify for 100% BPR under s105(1)(bb) IHTA 1984, provided: (1) the company is 'wholly or mainly' trading (not investment); (2) shares have been owned for 2+ years; (3) the business is a going concern. Excepted assets (excess cash, investment properties) within the company are excluded from BPR under s112. From April 2026, the £1m combined BPR/APR cap limits 100% relief.
What is a cross-option agreement and how does it help with IHT on private company shares?
A cross-option agreement gives the deceased's estate the right to sell their shares to the surviving shareholders, and gives the survivors the right to buy. It avoids a binding contract for sale (which would defeat BPR) while ensuring that, if BPR does not cover the full IHT bill, the estate can convert the shares to cash. Life insurance is placed in trust for each shareholder to fund the buy-out. The combination provides liquidity for IHT without selling the company to third parties.
How does the April 2026 BPR cap affect private company shareholders?
From 6 April 2026, only the first £1m of BPR/APR combined qualifies for 100% relief per person. Above £1m, only 50% BPR applies (effective 20% IHT rate). A shareholder with unquoted trading company shares worth £2m would face IHT of 40% × £500k = £200,000 on the above-cap portion. Planning: lifetime gift of shares as PETs; share equity with spouse; take out life insurance in trust; accelerate generational transfers before April 2026.
Specify What Happens to Your Shares
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