UK Inheritance Tax Reforms 2026 to 2027: BPR, Pension Pots and AIM Shares Explained
Updated April 2026 | 14 min read | ✓ Verified against HMRC, Finance Act 2026 and OBR data
Kaeltripton Verdict
The April 2026 and April 2027 IHT reforms are the biggest shake-up in a generation. Business owners, farmers, AIM investors and anyone with a pension larger than the nil-rate band must act now. Frozen thresholds plus rising asset values plus new caps means more estates will pay more tax. Professional estate planning is no longer optional.
The UK inheritance tax (IHT) landscape has undergone its most significant transformation in decades. Two sets of changes bookend 2026 and 2027: reforms to Business Property Relief (BPR) and Agricultural Property Relief (APR) that took effect on 6 April 2026, and the inclusion of most unused pension funds in taxable estates from 6 April 2027. Together they will drag tens of thousands of additional estates into the IHT net. HMRC receipts reached 8.2 billion pounds in 2024 to 2025 and the Office for Budget Responsibility (OBR) forecasts 9.1 billion pounds for 2025 to 2026, rising to 14.7 billion pounds by 2030 to 2031 as frozen thresholds and rising asset values compound the effect of the new rules.
This guide explains every change in plain English, quantifies the impact with worked examples, and identifies the planning strategies that can still mitigate exposure. Whether you are a business owner, a farmer, an AIM investor, or a pension holder with more than you need for retirement, this is the briefing you need before the rules tighten further.
The Starting Point: Why IHT Receipts Are at Record Levels
The standard nil-rate band (NRB) has been fixed at 325,000 pounds since April 2009. The residence nil-rate band (RNRB), introduced in 2017, adds up to 175,000 pounds per person when a main home passes to direct descendants, allowing a qualifying couple to pass up to one million pounds free of IHT. Both bands are frozen until at least April 2031 under the Finance Act 2025. Meanwhile, average UK house prices have roughly doubled since 2009, and equity portfolios and pension pots have grown substantially. The arithmetic is unavoidable: more estates cross the threshold every year, even without any change in behaviour or wealth accumulation.
HMRC data published in March 2026 shows receipts of 7.7 billion pounds in just the first eleven months of 2025 to 2026. The OBR expects the full-year total to reach 9.1 billion pounds, and with pension assets entering the taxable estate from April 2027, receipts are forecast to exceed 14 billion pounds annually by 2030 to 2031. Approximately one in ten UK estates will pay IHT by that point, up from around one in twenty today.
| Year | IHT Receipts (HMRC / OBR) | Key Driver |
|---|---|---|
| 2022 to 23 | 7.1 bn | Frozen NRB, rising property values |
| 2023 to 24 | 7.5 bn | Continued asset price growth |
| 2024 to 25 | 8.2 bn (record) | CGT changes pulling in more estates |
| 2025 to 26 | 9.1 bn (OBR forecast) | AIM relief cut, fiscal drag |
| 2030 to 31 | 14.7 bn (OBR forecast) | Pension inclusion, frozen bands |
April 2026 Reform 1: The New BPR and APR Cap
Business Property Relief and Agricultural Property Relief have historically been among the most powerful IHT planning tools available. Before October 2024, a qualifying business or farm of any size could be passed to the next generation with zero IHT, provided the two-year ownership test was met. That era has ended.
From 6 April 2026, the first 2.5 million pounds of qualifying business or agricultural assets per individual attracts 100 percent relief. Assets above that threshold receive 50 percent relief, producing an effective IHT rate of 20 percent on the excess. Critically, any unused portion of the 2.5 million pound allowance is transferable between spouses and civil partners, even where the first death occurred before 6 April 2026. A couple can therefore protect up to 5 million pounds of business or farm assets at full relief.
ⓘ The 2.5 million pound cap applies per individual. A married couple who each hold qualifying assets can each use their own allowance, shielding up to 5 million pounds combined before the 20 percent effective rate applies on any excess.
| Asset Value | BPR/APR Relief | Amount Chargeable | IHT Bill (40% rate) |
|---|---|---|---|
| 1 million | 100% on full amount | 0 | 0 |
| 2.5 million | 100% on full amount | 0 | 0 |
| 3 million | 100% on first 2.5m, 50% on 500k | 250,000 | 100,000 |
| 5 million (individual) | 100% on 2.5m, 50% on 2.5m | 1.25 million | 500,000 |
| 10 million (couple) | 5m at 100%, 5m at 50% | 2.5 million | 1 million |
Two important technical points accompany the new cap. First, assets already qualifying for the existing 50 percent relief under the old rules (such as land used in another person's business) do not count towards the 2.5 million pound limit. Second, IHT due on assets above the cap can be paid in ten equal annual interest-free instalments, preventing forced sales to settle a tax bill. This instalment option was deliberately included to protect family businesses and farms from liquidity crises.
⚠ If you already have trust structures holding BPR or APR assets, be aware that all trusts will eventually be subject to the 2.5 million pound cap, not just those created after October 2024. Historic trusts will be affected when they reach their ten-year anniversary charge, which could reduce the effectiveness of planning done before the rule changes.
April 2026 Reform 2: AIM Shares Downgraded to 50 Percent Relief
The Alternative Investment Market has long been used by wealthy investors as a tax-efficient vehicle for estate planning. Under the old rules, a qualifying AIM portfolio held for at least two years received 100 percent BPR relief, meaning the entire portfolio could pass outside the estate at death. From 6 April 2026 this blanket exemption has been abolished. AIM shares now receive a flat 50 percent relief regardless of holding period or portfolio size.
The practical effect is an automatic 20 percent effective tax rate on all AIM holdings at death. An investor holding a 500,000 pound AIM ISA portfolio who previously expected to pass it on tax-free will now face a 100,000 pound IHT bill. A 1 million pound portfolio generates a 200,000 pound liability. Crucially, AIM shares do not benefit from the new 2.5 million pound allowance that applies to trading businesses and farms. They sit in their own category at 50 percent, with no transferable allowance between spouses.
| AIM Portfolio Value | Old IHT Liability | New IHT Liability (2026) | Change |
|---|---|---|---|
| 250,000 | 0 | 50,000 | +50,000 |
| 500,000 | 0 | 100,000 | +100,000 |
| 750,000 | 0 | 150,000 | +150,000 |
| 1,000,000 | 0 | 200,000 | +200,000 |
| 2,000,000 | 0 | 400,000 | +400,000 |
Many financial planners are now reviewing whether AIM ISA portfolios still make sense as an estate planning tool. The remaining 50 percent relief does still provide a meaningful saving compared to holding mainstream equities, but the risk profile of AIM shares must be weighed against a benefit that has been halved. Investors close to death who hold large AIM portfolios may wish to consider whether rebalancing into other structures such as Business Property Relief funds, trusts, or straightforward gifting strategies offers a better risk-adjusted outcome.
April 2027 Reform: Pension Pots Enter the IHT Estate
The most consequential change in the entire reform programme takes effect on 6 April 2027. From that date, most unused pension funds and pension death benefits will be included in a deceased person's estate for IHT purposes under the Finance Act 2026. This ends a longstanding planning convention: for decades, financial planners routinely advised clients to spend other assets first and leave pension pots untouched, precisely because pensions sat outside the IHT net.
The legislation is specific. Death-in-service benefits payable from a registered pension scheme remain exempt, as do dependants' scheme pensions from defined benefit or collective money purchase arrangements. But for the vast majority of defined contribution pensions in drawdown or accumulation, the pot value at death will be added to the taxable estate. Personal representatives, not pension scheme administrators, will be responsible for reporting the pension value and paying any IHT due within six months of death.
ⓘ HMRC estimates 10,500 estates per year will face a new IHT liability from April 2027 that they would not have faced before. A further 38,500 estates will pay more IHT than previously. The average additional liability per affected estate is estimated at around 34,000 pounds.
The double taxation concern is real and acute. Pension funds left to non-spouse beneficiaries may attract IHT at 40 percent on the estate, then income tax at the beneficiary's marginal rate when the funds are drawn. For a higher-rate taxpayer inheriting a pension from an estate already subject to 40 percent IHT, the combined effective rate on those pension pounds could approach 64 percent. The government's stated intent is to remove the distortion that caused advisers to treat pensions as the default inheritance vehicle rather than a retirement funding vehicle.
| Pension Value at Death | Estate Already at NRB? | IHT on Pension (40%) | Beneficiary Income Tax (40%) | Effective Loss |
|---|---|---|---|---|
| 100,000 | Yes | 40,000 | 24,000 (on 60k remaining) | 64,000 (64%) |
| 250,000 | Yes | 100,000 | 60,000 (on 150k) | 160,000 (64%) |
| 500,000 | Yes | 200,000 | 120,000 (on 300k) | 320,000 (64%) |
| 500,000 | No (below NRB) | 0 | 200,000 (on 500k, basic rate) | 100,000 (20%) |
Who Is Most Affected by the 2026 and 2027 Changes?
The reforms do not affect most UK estates. The nil-rate band at 325,000 pounds and the residence nil-rate band at 175,000 pounds still protect the majority of families. But several groups face sharply higher exposure.
Business owners with enterprises valued above 2.5 million pounds will pay IHT on any excess at an effective 20 percent rate. Farmers holding agricultural land above the cap face the same outcome, and many farm valuations have increased substantially in recent years as land prices rose. Couples who planned their entire estate around one spouse holding all qualifying business assets, assuming a full transfer of unused allowance, need to verify their wills reflect the new transferability rules which require the first death to have unused allowance.
AIM investors who built portfolios specifically for IHT planning over many years now find their relief halved at a stroke. For portfolios held inside ISA wrappers, the AIM ISA remains valid, but the IHT benefit has been materially reduced. And pension holders who were advised to draw from ISAs and savings first, preserving pension pots for inheritance, need to reverse that sequencing strategy entirely given the April 2027 change.
Planning Strategies That Still Work
The reforms narrow the planning space but do not eliminate it. Several legitimate, HMRC-recognised strategies remain effective.
The seven-year gifting rule is unchanged. A potentially exempt transfer (PET) removes assets from the estate entirely if the donor survives for seven years after the gift. For donors in good health with substantial assets, systematic gifting programmes can still reduce estate values substantially. The 3,000 pound annual exemption, small gift exemption of 250 pounds per recipient, and gifts out of surplus income remain available and are immediate exemptions requiring no survival period.
For business and agricultural assets above the 2.5 million pound cap, life insurance written in trust is a well-established solution. A whole-of-life policy written in trust, with premiums covered by the surplus income exemption where possible, can provide a lump sum on death to cover the IHT bill without adding to the estate itself. For couples, second-life policies are typically more cost-effective.
ⓘ With pensions set to enter the estate in April 2027, the old drawdown sequencing rules need reviewing immediately. Drawing down pension funds to fund gifts, or to purchase assets that benefit from 100 percent BPR, may be more efficient than leaving the pot to face both IHT and income tax simultaneously.
Trusts remain powerful but are subject to the 2.5 million pound cap for BPR and APR assets. Discretionary trusts can still be used to freeze estate values, hold assets for multiple beneficiaries, and remove future growth from a taxable estate. The ten-year anniversary charge of up to six percent on the trust value is generally less damaging than the 40 percent IHT rate on death, particularly for long-term family wealth preservation.
Family investment companies (FICs) have grown in popularity as an alternative to trusts. By placing assets into a FIC and gifting shares over time, business owners can transfer economic value to the next generation while retaining control through director roles. The shares gifted start the seven-year PET clock and may attract little or no income tax if structured correctly.
The Frozen Nil-Rate Band: A Silent Tax Rise
Overlaid on all of these specific reforms is the ongoing freeze on the nil-rate bands. The NRB has stood at 325,000 pounds since 2009. Had it risen with CPI inflation since then, it would stand at approximately 525,000 pounds today. The gap between where the NRB is and where it would have been under indexation represents a silent tax rise that has pulled hundreds of thousands of estates into the IHT net over fifteen years.
Finance Act 2025 extended the freeze to April 2031. OBR modelling suggests the proportion of all UK deaths resulting in an IHT liability will rise from around 4.6 percent in 2022 to 2023 to close to 10 percent by 2030 to 2031. The interaction between frozen bands, rising house prices, rising pension values, and the new BPR and APR caps means the effective reach of IHT will roughly double over the course of this decade.
Disclaimer: This article is for informational purposes only and does not constitute financial or legal advice. Tax rules are subject to change. Always consult a qualified adviser before making decisions about your estate.
Frequently Asked Questions
What is the new BPR/APR cap from April 2026?
From 6 April 2026 the first 2.5 million pounds of qualifying business or agricultural assets per person receives 100 percent relief. Assets above that threshold receive 50 percent relief, creating an effective IHT rate of 20 percent on the excess. Unused allowance transfers between spouses, so couples can protect up to 5 million pounds at full relief.
When do pension pots come into IHT?
Most unused pension funds and death benefits are included in a deceased person's estate for IHT from 6 April 2027 under the Finance Act 2026. Death-in-service benefits and dependants' scheme pensions remain outside the IHT net. Personal representatives, not pension scheme administrators, are responsible for reporting and paying the tax.
What happened to AIM share IHT relief?
From April 2026 AIM-listed shares qualify for only 50 percent Business Property Relief, regardless of how long they have been held or what value they represent. Previously investors received 100 percent relief after a two-year holding period. The effective IHT rate on AIM holdings is now 20 percent.
Are the nil-rate bands increasing?
No. The standard nil-rate band remains frozen at 325,000 pounds and the residence nil-rate band at 175,000 pounds until at least April 2031, as confirmed by the Finance Act 2025. A couple can still pass up to 1 million pounds free of IHT if the residence nil-rate band is fully utilised.
How many more estates will pay IHT because of pensions?
HMRC estimates that 10,500 estates will face an IHT liability from 2027 to 2028 that would not have existed under the old rules. Approximately 38,500 estates will pay more IHT than previously, with the average increase in liability estimated at around 34,000 pounds per affected estate.
Can IHT on business assets be paid in instalments?
Yes. For business and agricultural assets eligible for BPR or APR, IHT may be paid in ten equal annual interest-free instalments. This provision was introduced alongside the April 2026 reforms to help business owners manage liquidity without selling assets to pay the tax bill.
📄 Sources & Further Reading
- HMRC: Inheritance Tax on Unused Pension Funds and Death Benefits (gov.uk)
- Finance Act 2026 — Business Property Relief and Agricultural Property Relief reforms
- OBR: Inheritance Tax Forecasts (Spring Statement 2026)
- HMRC Monthly Tax Receipts Bulletin, March 2026
- House of Commons Library: Inheritance Tax — Current Policy and Debates (April 2026)
- PKF Francis Clark: Capital Gains, IHT and Estate Planning Updates 2026
- Arbuthnot Latham: Pensions, Business Relief and IHT Reform (January 2026)
