Written by Tony Vaughan·Last reviewed: July 2026
Bottom line up front. From 6 April 2026 many UK SME owners' estates face inheritance tax on their business for the first time. 100% Business Property Relief is capped at the first £2.5 million of combined qualifying business and agricultural property per individual; qualifying value above that receives only 50% relief, giving an effective IHT rate of 20% on the excess. AIM-quoted shares drop from 100% to 50% relief on the same date. The number your company is worth is now the number HMRC will tax, which is why a defensible valuation has moved from optional to the starting point of any credible estate plan.
Analysis of 2,500+ UK SME business value appraisals by BusinessValuation.co.uk shows most owner-managed trading businesses have never had a formal share valuation and, when asked, materially misjudge what the shares are actually worth, usually by understating them once retained profits, working capital and goodwill are properly reflected. Under the pre-2026 regime the gap did not matter because 100% BPR covered it. Under the new regime the gap is the tax bill.
This piece is written for owners who may have no intention of selling, and for families planning succession, whose estate exposure is genuinely new. It is educational and not tax advice: your accountant or tax adviser should sign off the specifics of your own position before you act.
What actually changed on 6 April 2026
Business Property Relief (also called Business Relief) has, for decades, taken most trading businesses out of inheritance tax altogether at 100% relief, with no upper limit. From 6 April 2026 that unlimited relief is gone.
The rules from that date, and they are HMRC rules rather than findings from our practice, are these. 100% relief applies to the first £2.5 million of combined qualifying business and agricultural property held by an individual. The unused portion of that £2.5 million allowance is transferable between spouses and civil partners, so a married couple who each hold qualifying property can, in principle, cover a combined £5 million at 100%. Qualifying value above the £2.5 million allowance receives 50% relief, which produces an effective IHT rate of 20% on the excess (inheritance tax at the standard 40% rate applied to half the value). Shares traded on AIM or similar recognised growth markets qualify for 50% relief from the same date, not the historic 100%.
Why valuation moved from irrelevant to central
When 100% relief was unlimited, the precise value of a trading company shareholding rarely mattered for inheritance tax. Advisers noted the shares on the estate return, claimed BPR at 100%, and the number was rounded, estimated, or drawn from a stale accountant's letter without consequence. That is over.
In plain terms, the value above £2.5 million is now the tax base. A defensible, contemporaneous valuation is the difference between an estate return HMRC will accept and one HMRC's Shares and Assets Valuation team will reopen. Two thresholds create the exposure: first, whether the estate crosses the £2.5 million allowance at all; second, how much sits above it once the allowance is applied.
The practical consequence is that owners who have never previously commissioned a share valuation now need one, both to test their position against the allowance and to hold on file as evidence should HMRC challenge the figure later.
The worked example every owner should understand
Take a qualifying trading business worth £5 million passing on death from a single owner. The first £2.5 million is fully relieved at 100%. The remaining £2.5 million receives 50% relief, so £1.25 million becomes taxable. At the 40% inheritance tax rate that is a £500,000 IHT bill on a business the owner's family may have no intention of selling.
| Value band | BPR relief | Taxable value | IHT at 40% |
|---|---|---|---|
| First £2.5m | 100% | £0 | £0 |
| Next £2.5m (£2.5m to £5m) | 50% | £1.25m | £500,000 |
| Total | £1.25m | £500,000 |
The mechanics are straightforward. What is not straightforward is how the family finds £500,000 of cash inside the seven months HMRC allows for payment on a business the estate does not want to, and often cannot easily, sell. That question, not the arithmetic, is the reason valuation now belongs at the front of the estate plan rather than after it.
A practical action blueprint for the next twelve months
The sequence below is the one we run with clients who are working through the new regime. It is deliberately non-clever: the point is to test the exposure honestly, then to build the documentation and the funding around it.
Step 1: establish a current defensible value. Not a director's opinion, not a stale accountant's letter, not a rule-of-thumb multiple. A written valuation prepared to a standard HMRC's Shares and Assets Valuation team will recognise: methodology explained, comparable evidence cited, adjusted earnings normalised, minority discounts (where relevant) reasoned rather than asserted. For most owner-managed SMEs, the earnings-based approach (a multiple of adjusted EBITDA within the 3x to 8x band typical of UK SMEs) will be the primary lens, cross-checked against asset value. Our UK SME valuation multiples guide sets out the current ranges.
Step 2: test against the allowance, including the spousal transfer. Where shares are held jointly or by a single spouse, the £2.5 million per person and the transferable unused element together can move a family from clearly exposed to comfortably inside the allowance, or the reverse. This is a document exercise, not a mental one: shareholder register, articles, any shareholders' agreement, spouses' current wills, all read together.
Step 3: review wills, shareholder agreements and life cover. Wills drafted before Autumn Budget 2024 typically assume unlimited BPR and often leave shares directly to a surviving spouse, wasting the deceased's £2.5 million allowance if not structured through a nil-rate-band or discretionary arrangement. Shareholder agreements may contain cross-option or pre-emption clauses that do not sit cleanly with the new tax position. Life cover written in trust, sized to the modelled IHT liability, is the most common practical funding mechanism so that heirs receive cash rather than a forced sale.
Step 4: consider lifetime gifting, and other succession routes, with clear eyes. A gift of shares to an individual is a Potentially Exempt Transfer and becomes fully exempt if the donor survives seven years. Under the old regime, a failed PET on shares was usually covered by BPR at 100% at the date of death; under the new regime, a failed PET can now produce inheritance tax where before it produced none. That makes a proper contemporaneous valuation at the date of the gift, and diarised reviews across the seven-year window, essential. Gifting also engages capital gains tax on the deemed disposal (though holdover relief may be available in qualifying cases) and means genuinely surrendering ownership and, often, control. For families where an outright gift is not the right fit, an Employee Ownership Trust can transfer control to a trust for the workforce on a deferred-consideration basis, and a phased retirement or exit plan can crystallise value in the founder's lifetime rather than in the estate. The tax logic is not the whole story.
Step 5: put a revaluation rhythm in place. A twelve-month cadence is realistic for owner-managed businesses whose value moves with earnings and market conditions. Where the estate is close to the £2.5 million threshold in either direction, a shorter cycle is sensible. A one-page annual update, anchored to the original formal valuation, is usually enough.
| Step | Timeline | Common challenges | Outcome |
|---|---|---|---|
| Current defensible value | Weeks 1 to 6 | Locating clean adjusted earnings, evidencing comparables | Written valuation on file |
| Allowance test | Weeks 4 to 8 | Untidy share registers, out-of-date articles | Clear exposure figure |
| Wills, agreements, life cover | Weeks 6 to 16 | Old wills wasting the first allowance | Estate structure aligned to £2.5m per person |
| Lifetime gifting decision | Months 3 to 9 | CGT interaction, loss of control | Documented gifts with dated valuations |
| Revaluation rhythm | Annual thereafter | Drift from the baseline | Current file at all times |
Owners considering an exit route rather than succession should read this alongside the 2026 business valuation guide and our exit planning service, which together cover how sale proceeds interact with Business Asset Disposal Relief and how the transaction is sequenced around the estate plan. Note the numbers are not comparable: BADR is 18% for disposals on or after 6 April 2026 on the first £1 million of qualifying lifetime gains, an entirely separate figure from the BPR £2.5 million allowance. Owners granting equity to management as part of a phased exit should also revisit their EMI share valuation position, since the £2.5 million BPR allowance changes the calculus on how much equity to retain personally.
What HMRC scrutiny of your valuation actually looks like
The bottom line for owners is that HMRC's Shares and Assets Valuation team can now be expected to look closely at any private-company valuation that touches the £2.5 million threshold, because tax is at stake for the first time. That scrutiny falls on three specific things: whether the business is a qualifying trading business at all (investment activity is excluded), how the £2.5 million threshold has been tested, and the methodology behind the figure itself, particularly the earnings base, the multiple, and any minority discount applied.
A signed formal valuation report, prepared to recognised professional standards, is materially more defensible in that conversation than a number on a spreadsheet or a paragraph in a covering letter. The report shows the working: normalised earnings with each adjustment evidenced, comparable transactions cited with source, multiples reasoned against sector and size, minority discounts (typically 15% to 40% depending on shareholding and rights) reasoned against holding size, control features and dividend history, and asset-value cross-checks. When HMRC reopens a figure that has that documentation behind it, the conversation is usually about refinement. When they reopen a figure that does not, the conversation is often about substitution.
For owners moving into this territory for the first time, a formal valuation report is the right instrument. Indicative valuations, useful for owner planning conversations, do not carry the evidence trail HMRC expects when tax turns on the number. For a general orientation to methodology before commissioning the work, our guide to valuing a UK business sets out the framework the report will follow.
None of this is a reason to inflate or deflate the number. HMRC's team is experienced and the professional standards a competent valuer works to (IVSC, RICS Red Book where relevant, HMRC's own SAV manuals) leave limited room for creative positioning. The point of the formal report is not to produce a lower figure; it is to produce a right figure whose reasoning survives inspection.
What to do next
The starting point of any credible response to the 2026 BPR regime is knowing the number. Test your business against the £2.5 million allowance with a defensible current valuation, then take that figure to your accountant, tax adviser and solicitor to build the estate structure, gifting decisions and funding around it. A confidential indicative valuation from our team at BusinessValuation.co.uk is a free, no-pressure way to see where you sit before commissioning a formal report.
Next steps
Related resources
Questions & Answers
Quick reference answers to the questions UK SME owners most often ask on this topic.
How do the Business Property Relief changes from April 2026 affect my business?
From 6 April 2026, 100% BPR is capped at the first £2.5 million of combined qualifying business and agricultural property per individual, with 50% relief on the excess, giving an effective 20% IHT rate on value above the allowance. If the shares in your qualifying trading business are worth more than £2.5 million (or £5 million between spouses using the transferable unused portion), part of that value is now inside the inheritance tax net for the first time. The practical consequence is that you need a defensible, current valuation, aligned wills, and, usually, a funding plan such as life cover written in trust so that heirs are not forced into a sale to pay HMRC.
Do I need a business valuation for inheritance tax planning?
Yes, in almost every case where the shares might reasonably be worth more than around £2 million, and increasingly even below that where growth is likely to push the estate through the £2.5 million allowance in the next few years. A formal valuation gives you the exposure figure to plan against, evidences your position if HMRC's Shares and Assets Valuation team reviews the estate return, and provides the baseline against which any lifetime gifts are dated. Under the old regime a rough figure was acceptable because 100% BPR covered the difference; under the new regime the figure is the tax base.
How much inheritance tax will my family pay on my business?
For a single owner, the calculation is: (value of qualifying business property, less the first £2.5 million relieved at 100%, less 50% of the remainder) taxed at 40%. On a £5 million qualifying business the sum is £500,000, being 40% of £1.25 million. Married couples who each hold qualifying shares can potentially cover £5 million between them at 100% relief, so a £5 million jointly-held business could still fall entirely inside the combined allowance if the wills are structured to use the deceased spouse's £2.5 million rather than pass it to the survivor and waste it.
Can I gift my business to my children to avoid inheritance tax?
Gifting shares to your children is a Potentially Exempt Transfer: fully exempt if you survive seven years from the date of the gift, tapered thereafter. It can reduce or remove IHT exposure but comes with real trade-offs. You give up ownership and possibly control, the gift is a deemed disposal for capital gains tax (though holdover relief may be available), and if you fail the seven-year test the shares can now produce IHT where under the old regime full BPR would usually have covered them. A dated, defensible valuation at the point of the gift is essential and, in most cases, a family shareholders' agreement should be updated at the same time.
How does HMRC value a private company for inheritance tax?
HMRC's Shares and Assets Valuation team looks at what a hypothetical willing buyer would pay a hypothetical willing seller for the specific shareholding, in an open market, with no special interest. For most owner-managed trading companies this comes back to a multiple of maintainable adjusted earnings (typically 3x to 8x EBITDA depending on sector, size and quality), cross-checked against asset value and any recent transaction evidence. Where the estate holds a minority stake, a minority discount is applied (commonly 15% to 40% depending on the size of the holding, the articles, and the dividend and control position). Methodology and evidence matter: HMRC will accept a well-reasoned figure and challenge a bare assertion.
Is my business exempt from inheritance tax?
Only in part, and only if it is a qualifying trading business rather than an investment business. From 6 April 2026, qualifying businesses get 100% relief on the first £2.5 million of combined qualifying business and agricultural property and 50% relief above that, so no qualifying business is fully exempt above the allowance. Investment businesses (property letting, share portfolios and similar) never qualified for BPR and are still fully within the IHT net at 40%. Whether a mixed business qualifies at all depends on the balance of trading and investment activity; borderline cases are worth checking with your tax adviser before assuming relief applies.
What happens to Business Property Relief on AIM shares in 2026?
From 6 April 2026, shares traded on AIM or similar recognised growth markets qualify for 50% BPR, not the historic 100%. The effective IHT rate on the value of qualifying AIM shares is therefore 20% (40% on half the value), regardless of the £2.5 million allowance for unquoted qualifying business and agricultural property. This has changed the calculus for AIM-focused IHT portfolios materially: they still reduce the effective rate compared with fully-taxed assets, but they no longer provide the full shelter they did before. Anyone using AIM shares as part of an IHT strategy should revisit their position with a specialist.
Should we update our wills to make the best use of the £2.5 million allowance?
In most cases with qualifying business or agricultural property, yes. Wills that simply leave everything to the surviving spouse waste the first spouse's £2.5 million BPR allowance because inter-spouse transfers are already exempt from IHT and no allowance is consumed. Structuring the shares through a nil-rate-band or discretionary arrangement on first death can preserve the allowance and, on second death, keep more of the business inside 100% relief. Every family's position is different, so this is a conversation with your solicitor and tax adviser rather than a change to make on assumption.
Written by
Tony Vaughan
Senior SME valuation adviser, 2,500+ business value appraisals.
