UK IHT Planning Strategies in 2026

UK inheritance tax planning has changed substantially in the past 18 months. The April 2025 reform of the non-dom IHT framework, the continuing freeze of the nil-rate bands, the announced reforms to Business Relief from April 2026, and the planned inclusion of unused pension pots in the IHT regime from April 2027 have together reshaped the planning environment. For families with estates at or above the IHT threshold, the levers available are still meaningful but require more careful thinking than they did before the reforms.

This article sets out the main UK IHT planning strategies in 2026, the situations in which each is most useful, and the trade-offs to weigh. The framing is strategic and educational; the practical implementation of any of these strategies depends on individual circumstances and requires regulated tax and legal advice.

The starting framework

UK IHT is charged at 40 percent on the value of an estate above the available nil-rate bands. The standard nil-rate band is 325,000 pounds per individual; the residence nil-rate band is up to 175,000 pounds per individual where a qualifying main residence is left to direct descendants. Both bands are transferable between spouses and civil partners.

The first step in any planning exercise is calculating the position under the current rules: estate value, available nil-rate bands (including any transferable bands from a deceased spouse), and the IHT charge that would apply on death today. This baseline shapes the rest of the planning.

Strategy 1: Use the spouse exemption

The unlimited spouse and civil partner exemption is the most important UK IHT provision. Transfers between UK-resident spouses are exempt from IHT and preserve the first spouse's nil-rate bands for transfer to the survivor.

The conventional approach for most couples is to leave everything to the surviving spouse on first death, claiming the spouse exemption in full. On the second death, the survivor's executor claims the transferred nil-rate bands and the combined IHT-free threshold can reach 1 million pounds.

When the spouse exemption falls short

Where one spouse is long-term UK resident and the other is not, the spouse exemption is capped unless the non-long-term-resident spouse elects to be treated as long-term resident. The 6 April 2025 reform changed the test from domicile to long-term residence; couples with mismatched status need to consider whether the election makes sense (it brings the non-long-term-resident spouse into worldwide UK IHT scope).

Strategy 2: Lifetime gifting

Lifetime gifting reduces the estate over time and uses the various lifetime exemptions to make exempt transfers immediately, or to start the seven-year clock on potentially exempt transfers (PETs).

Use the annual exemption

Each individual has a 3,000 pound annual exemption. Unused annual exemption carries forward one tax year, so a couple who have used neither for two years can together exempt 12,000 pounds in a single year.

Use small gifts and wedding gifts

Small gifts of up to 250 pounds per recipient per year are exempt. Wedding and civil partnership gifts are exempt up to defined amounts (5,000 pounds from a parent, 2,500 pounds from a grandparent, 1,000 pounds from others). These exemptions are useful for regular gifting to family members.

Document gifts from surplus income

Regular gifts from surplus income (not from capital) that do not affect the donor's standard of living are exempt from IHT without limit. The exemption requires habit, surplus income, and no impact on the donor's lifestyle. Good record-keeping is essential because the exemption is claimed on death by the executor and HMRC reviews the evidence carefully.

Use PETs strategically

Large lifetime gifts not covered by an exemption are PETs. If the donor survives seven years, the gift is fully exempt. Planning typically combines smaller annual exempt gifts with larger PETs made well ahead of expected death. Insurance to cover the IHT liability on the PETs in the seven-year window is a common companion strategy.

Strategy 3: Whole-of-life insurance in trust

A whole-of-life insurance policy written in trust for named beneficiaries pays a tax-free lump sum on death without entering the estate. The lump sum can be used to fund the IHT liability, leaving the rest of the estate intact for the beneficiaries.

The structure is most useful where the IHT liability is large and the rest of the estate is illiquid (for example, a family home, a family business, or other assets that the family wants to retain rather than sell to pay IHT). Premiums on whole-of-life cover depend on age and health at outset; the structure works best for those still in reasonable health.

Strategy 4: Charitable bequests

UK-registered charity bequests are exempt from IHT without limit. Where charitable bequests exceed 10 percent of the net estate (after deducting the nil-rate band), the IHT rate on the rest of the estate is reduced from 40 percent to 36 percent. The reduced rate is a meaningful planning lever for philanthropic estates.

The 10 percent test is calculated on the net estate (after the nil-rate band), not the gross estate. A small charitable bequest can sometimes increase the net amount passing to family beneficiaries by triggering the reduced rate on the rest of the estate. Modelling the threshold carefully can identify cases where increasing a charitable bequest to cross the 10 percent line saves the family more than the increased charitable amount.

Strategy 5: Business Relief and Agricultural Property Relief

Business Relief reduces the IHT value of qualifying business assets by 50 percent or 100 percent depending on the asset type. Agricultural Property Relief reduces the IHT value of qualifying agricultural land and buildings on similar terms. The April 2026 reforms cap the 100 percent rate at 1 million pounds combined for Business Relief and Agricultural Property Relief, with the excess qualifying for 50 percent relief.

Implications for business owners

Business owners who would previously have relied on full 100 percent Business Relief on substantial holdings need to model the post-April 2026 position. For a family business worth 5 million pounds, the post-reform IHT exposure can be significantly larger than the pre-reform exposure, although still much less than the no-relief baseline.

AIM portfolios

Qualifying AIM-listed trading company shares have, under current rules, attracted 100 percent Business Relief after the two-year holding period. The April 2026 reforms reduce this to 50 percent for AIM shares. Investors using AIM IHT portfolio services as a planning lever should review the post-reform position and consider whether the strategy still meets their objectives.

Strategy 6: Pension contributions and the April 2027 reform

Under current UK rules, unused defined contribution pension pots pass to beneficiaries outside the IHT regime. The Autumn Budget 2024 announced that unused pension pots will be brought within IHT from April 2027.

Until April 2027, pension contributions can provide a useful IHT-efficient sheltering of capital, particularly where the saver is over 75 (so contributions still benefit from tax relief) and the family is the intended ultimate beneficiary. From April 2027, the planning calculus changes substantially. Savers and their advisers should model the post-April 2027 position before relying on pension structures as an IHT planning tool.

Strategy 7: Trusts

UK trusts have complex IHT treatment. Most lifetime gifts into trusts are chargeable lifetime transfers (CLTs) attracting an immediate 20 percent IHT charge above the available nil-rate band. Trusts are also subject to ten-yearly periodic charges and exit charges when assets leave the trust.

Despite the complexity, trusts remain valuable in specific IHT planning situations: protecting assets for vulnerable beneficiaries, controlling timing of distributions, sheltering assets that qualify for Business Relief, and managing assets across generations. Trust planning is highly specialised and requires regulated legal and tax advice.

Strategy 8: Will structure

The will's structure can materially affect the IHT outcome without changing the underlying gifts. Common will-based levers include:

• Spouse-first wills that preserve the nil-rate bands for transfer
• Charitable gifts above the 10 percent threshold for the reduced 36 percent rate
• Specific bequests of qualifying business assets to direct beneficiaries to use Business Relief efficiently
• Discretionary will trusts (where appropriate) for flexibility
• Letters of wishes to guide trustees without binding the disposition

Common planning pitfalls

The most common pitfalls are: failing to claim the transferable nil-rate band from a deceased spouse; making gifts with reservation of benefit that the seven-year clock cannot fix; underestimating future estate growth (estate values often rise materially even where the nil-rate band stays frozen); failing to update the will after life changes; relying on Business Relief assumptions that change under the April 2026 reforms; and assuming pension pots remain outside IHT after April 2027.

The right combination depends on circumstances

No single IHT planning strategy works for every family. The right combination depends on the estate's size and composition, family circumstances, business interests, charitable intentions, the donor's health and life expectancy, and tolerance for complexity. Estates at or above the IHT threshold benefit from regulated tax and legal advice to identify the highest-value levers and the right order to implement them.

Important: This article is for general information and does not constitute regulated financial advice or legal advice. UK IHT planning is complex and the rules continue to change, with material reforms in April 2025, April 2026, and April 2027. The strategies in this article are educational; their suitability depends on individual circumstances and requires advice from a qualified tax adviser and a solicitor.

Frequently asked questions

What is the most effective UK IHT planning strategy?

There is no single most effective strategy. The right approach depends on the estate's size and composition. For most couples below 1 million pounds, the combination of spouse exemption and transferable nil-rate bands is sufficient. For larger estates, lifetime gifting, insurance in trust, charitable bequests, and Business Relief planning are commonly combined.

How does the 10 percent charity test work?

Where at least 10 percent of the net estate (after deducting the nil-rate band) is left to qualifying charities, the IHT rate on the rest of the estate is reduced from 40 percent to 36 percent. Modelling the threshold can identify cases where a small increase in the charitable bequest reduces the family's net IHT liability.

Should I make large lifetime gifts to use the 7-year rule?

Possibly, if the donor retains enough capital and income to support their lifetime needs and the gifts do not create a reservation of benefit. The seven-year rule is a useful planning lever but the donor must survive seven years for the gift to be fully exempt. Insurance to cover the IHT liability in the seven-year window is a common companion strategy.

Can pension contributions help with UK IHT?

Under current rules, unused defined contribution pension pots pass to beneficiaries outside the IHT regime. From April 2027, this treatment will change under reforms announced in the Autumn Budget 2024. Planning should reference the current gov.uk position on the implementation timetable.

Are trusts a good UK IHT planning tool?

They can be in specific situations, including protecting assets for vulnerable beneficiaries, controlling distributions, sheltering Business Relief assets, and managing assets across generations. Trust IHT mechanics are complex and benefit from specialist tax and legal advice.

How are the April 2026 reforms changing the planning landscape?

The 100 percent rates for Business Relief and Agricultural Property Relief will be capped at 1 million pounds combined, with the excess qualifying for 50 percent relief. AIM shares will receive 50 percent relief without a cap. Business owners with substantial qualifying assets face materially higher post-reform IHT exposure.