Inheritance Tax Calculator

Estimate the UK IHT liability on an estate at the 2025/26 thresholds, including the Residence Nil-Rate Band

Calculator

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10%+ of the net estate qualifies for the reduced 36% IHT rate

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Based on UK IHT rates for the 2025/26 tax year. Pensions enter the IHT estate from April 2027.

Want this done properly by an accountant?

An IHT estimate is a starting point — the real saving comes from gifts, trusts, life cover and timing. We model the full picture and the seven-year tail before you commit to anything.

Understanding Inheritance Tax

Inheritance Tax (IHT) is the tax paid on the estate of someone who has died. It is charged at 40% on the part of the estate that sits above the tax-free thresholds. With those thresholds frozen until 2030 and property values still elevated, more estates than ever now fall into IHT.

Anything left to a spouse or civil partner is normally exempt, as are gifts to UK-registered charities. The remaining wealth is what the nil-rate bands and IHT calculation apply to.

UK IHT Thresholds (2025/26)

  • Nil-rate band: £325,000 — the standard tax-free allowance per person, frozen until April 2030.
  • Residence Nil-Rate Band: £175,000 — an additional allowance when the main home is left to direct descendants (children, grandchildren, step-children or adopted children).
  • Combined for a couple: up to £1 million — a married couple or civil partners can leave up to £1m to direct descendants completely tax-free, by stacking each nil-rate band and each residence band.
  • £2,000,000 taper threshold — the RNRB is reduced by £1 for every £2 the estate exceeds £2 million, and disappears entirely above around £2.35m for a single person or £2.7m for a couple.

IHT Rates and the Charity Reduction

The standard IHT rate is 40% on the value above the tax-free thresholds. A reduced rate of 36% applies when at least 10% of the net estate (the "baseline amount") is left to a UK-registered charity.

On lifetime gifts that fall back into the estate within seven years, taper relief reduces the effective tax depending on how long ago the gift was made. The calculation has nuances that a calculator alone can't cover — our tax planning service runs the seven-year history of gifts before producing a final liability.

Changes Coming to UK Inheritance Tax

The Autumn 2024 Budget announced several major IHT changes phased in over the next few years:

  • From April 2026: the 100% Business Property Relief and Agricultural Property Relief will be capped at a combined £1m per individual. Anything above is taxed at an effective 20% rate.
  • From April 2027: unused pension pots will be brought into the IHT estate for the first time, removing a long-standing planning route.
  • From April 2025: the UK has moved from a domicile-based to a residence-based IHT system for new arrivals and long-term residents.

These are some of the biggest IHT changes in a generation. Estate plans drawn up before October 2024 are likely to need a rebuild, particularly where pensions or family businesses are involved.

Planning an Estate or Reviewing a Will?

We work with families across North London on inheritance tax planning — gifts, trusts, life cover, business succession and the new rules on pensions and BPR. Get the strategy modelled before it becomes urgent.