How to Reduce Inheritance Tax Legally
A Clear Guide to the Allowances, Reliefs and Planning Tools Available to UK Families
Inheritance tax is often described as the most avoidable tax — and the most paid. The difference between an estate that's structured carefully and one that isn't can run to hundreds of thousands of pounds. For most families, the issue isn't that the rules don't allow them to plan; it's that the planning hasn't been done.
This guide is the starting point. It explains the allowances and reliefs available, the most effective lifetime and post-death strategies, and where to go for more depth on the planning techniques that are likely to matter most for your circumstances. None of what follows involves anything aggressive, contrived or controversial — it's about using, properly and methodically, the structures and reliefs that the law specifically provides.
Start With The Allowances
Several inheritance tax allowances are available, and using them in full is often the single most valuable thing a family can do. The most important are:
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The Nil-Rate Band (NRB) — currently £325,000 per individual, the amount of an estate that passes free of inheritance tax.
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The Transferable Nil-Rate Band — since 2007, any unused portion of the NRB can be transferred from a deceased spouse or civil partner to the survivor, giving most couples a combined allowance of up to £650,000.
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The Residence Nil-Rate Band (RNRB) — an additional allowance, currently £175,000, available where the family home passes to direct descendants, subject to qualifying conditions and tapering on larger estates.
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Annual and lifetime gift exemptions — including the £3,000 annual exemption, small gifts, and marriage gifts (covered in detail in our Seven-Year Rule guide).
Used in full, these allowances mean a married couple can typically pass on up to £1 million before inheritance tax applies — but the rules around the RNRB and transferable bands are technical, and the allowances are sometimes lost where the will isn't drafted with them in mind. Our linked guides explain how each one works.
Lifetime Gifting - and the Exemptions You Don't Have to Wait For
Making gifts during your lifetime can reduce the value of your estate substantially. The Seven-Year Rule is the most familiar element: gifts that you survive by seven years generally fall outside your estate.
However, some of the most valuable gift planning involves exemptions that apply immediately, with no waiting period:
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Normal expenditure out of income — regular gifts made from surplus income, where you can maintain your usual standard of living without dipping into capital, are exempt straight away. There's no upper limit.
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The annual exemption — £3,000 per tax year (carry-forward of one year available), immediately exempt.
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Spouse and charity exemptions — gifts between UK-domiciled spouses or civil partners, and gifts to UK charities, are unlimited and immediate.
These exemptions are powerful, under-used, and worth understanding properly before relying on the seven-year rule.
Use Trusts Where They Add Genuine Value
Trusts allow you to retain control over how and when wealth passes to the next generation, while still reducing the value of your estate. They're particularly valuable where:
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Beneficiaries are young or vulnerable
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You want to provide for a surviving spouse without disinheriting children from a previous relationship
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You want to keep assets within the bloodline through divorce, remarriage or financial difficulty
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You need liquidity to settle inheritance tax without forcing the sale of property or business assets
A trust in your will — sometimes called a will trust — is often the simplest and most effective starting point. It's set up in your will, takes effect on your death, and can be tailored carefully to your family's circumstances. Our guide on whether you need a trust in your will explores when such an arrangement makes the most sense.
For families with more complex needs, a wider range of trust structures may apply — discretionary trusts, life interest trusts, business protection trusts and others — each with their own tax treatments and uses.
Specific Reliefs - Business, Agricultural and Woodlands
Beyond the main allowances, several specific reliefs can substantially reduce or eliminate inheritance tax on qualifying assets:
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Business Property Relief (BPR) — relief on qualifying trading businesses and certain shares (subject to the changes coming into effect from April 2026 — see our 2027 reforms guidance for the impact).
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Agricultural Property Relief — relief on qualifying agricultural land and property.
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Woodlands Relief — a specific relief that allows tax on the value of certain qualifying woodlands to be deferred until the timber is sold.
These reliefs are technical, and qualifying conditions matter enormously. Where your estate includes any of these asset types, specialist advice is essential — but where the conditions are met, the savings can be very significant.
Review Your Will Regularly
Inheritance tax rules change. Allowances shift. Family circumstances evolve. A will that was perfectly drafted a decade ago may no longer make full use of available reliefs or may pre-date significant changes such as the Residence Nil-Rate Band (introduced in 2017) or the major reforms coming into effect from April 2027.
We generally recommend a will and inheritance tax planning review at least every three to five years, and sooner where there's been a significant change — a marriage or divorce, a death in the family, the birth of children or grandchildren, a major change in assets, or significant new legislation.
A Note on the 2026 and 2027 Reforms
For accountants, advisers, and families with substantial estates, the changes to Business Property Relief (effective from April 2026) and the inclusion of most unused pension funds in the inheritance tax framework (from April 2027) are likely to be the most significant developments in UK estate planning for many years.
We've covered the planning implications for advisers in detail in our book Pension Paradigm, which sets out what the pension reforms mean for families and their planners.
Talk It Through With Us
Inheritance tax planning is rarely about a single decision — it's about coordinating allowances, exemptions, gifting and trusts so that they work together for your family. We'd be glad to help you understand where you stand and what's worth doing.