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Inheritance Tax Basics

WillsLast reviewed: 1 April 202511 min

Inheritance tax (IHT) is charged at 40% on the value of an estate above the nil-rate band threshold. With careful planning — using available exemptions, reliefs, and lifetime gifting — many families can significantly reduce or eliminate their IHT liability. This guide explains the key rules and the main planning opportunities available.

Key points

  • Inheritance tax is charged at 40% on the taxable estate — the value of the estate above the nil-rate band(s).
  • The nil-rate band is £325,000 and has been frozen at this level until at least 2030. It can be transferred to a surviving spouse or civil partner, giving a combined allowance of up to £650,000.
  • The residence nil-rate band (RNRB) adds up to £175,000 where a residential property is passed to direct descendants — potentially giving a combined threshold of £500,000 for an individual or £1 million for a married couple.
  • Gifts between spouses and civil partners are completely exempt from IHT (the spouse exemption).
  • Gifts made more than 7 years before death are completely exempt from IHT — giving away assets during your lifetime is the most effective IHT planning tool.
  • Taper relief reduces the IHT payable on gifts made between 3 and 7 years before death on a sliding scale.

Nil-Rate Bands and Thresholds

Every individual has a nil-rate band (NRB) of £325,000 — meaning the first £325,000 of their estate is taxed at 0%. The balance above this is taxed at 40%.

Residence Nil-Rate Band (RNRB): An additional £175,000 allowance is available where a residential property that was the deceased's main home is passed to direct descendants (children, grandchildren, stepchildren, adopted children — but not nephews, nieces, or siblings). The RNRB is tapered for estates over £2 million, reducing by £1 for every £2 the estate exceeds that threshold.

Transferred NRB and RNRB: If a spouse or civil partner did not use all of their NRB and/or RNRB when they died, the unused percentage can be transferred to the surviving spouse's estate. This means a married couple or civil partners can potentially pass up to:

  • £650,000 (2 × NRB) if neither has a qualifying residential property, or
  • £1,000,000 (2 × NRB + 2 × RNRB) if the estate includes a qualifying residential property passing to direct descendants.

IHT must normally be paid to HMRC within 6 months of the end of the month of death. Interest accrues on unpaid IHT after this date. HMRC allows IHT on property to be paid by instalments over 10 years.

Key Exemptions and Reliefs

The following transfers are completely exempt from IHT:

  • Spouse or civil partner exemption: Transfers to a surviving spouse or civil partner are wholly exempt from IHT — whether made during lifetime or on death. There is no limit on this exemption, though it only applies where both spouses are UK-domiciled.
  • Charity exemption: Gifts to UK registered charities are fully exempt. If you leave 10% or more of your net estate to charity, the rate of IHT on the remainder is reduced from 40% to 36%.
  • Annual exemption: You can give away up to £3,000 per tax year free of IHT — and if you did not use the previous year's exemption, you can carry it forward once (so up to £6,000 in the first year).
  • Small gifts exemption: Up to £250 to any one person in a tax year.
  • Wedding or civil partnership gifts: £5,000 to a child, £2,500 to a grandchild or great-grandchild, £1,000 to anyone else.
  • Normal expenditure out of income: Regular gifts made out of surplus income (not capital) are exempt, provided you can show they were regular and habitual and did not affect your standard of living.
  • Business Property Relief (BPR): Up to 100% relief for qualifying business interests and shares in unquoted companies.
  • Agricultural Property Relief (APR): Up to 100% relief for qualifying agricultural property.

The 7-Year Rule and Potentially Exempt Transfers

Gifts made to individuals during your lifetime are known as Potentially Exempt Transfers (PETs). A PET is only definitively exempt from IHT if you survive for 7 years after making the gift. If you die within 7 years, the gift is brought back into your estate and may be subject to IHT.

This is the most important lifetime planning rule in IHT — it means that giving assets away early enough can remove them from your estate entirely.

Taper relief applies to gifts made between 3 and 7 years before death, reducing the IHT payable on those gifts:

Years between gift and deathReduction in IHT on the giftEffective rate
0–3 years0% reduction40%
3–4 years20% reduction32%
4–5 years40% reduction24%
5–6 years60% reduction16%
6–7 years80% reduction8%
7+ years100% reduction0%

Note: taper relief reduces the tax, not the value of the gift. Also, taper relief is only valuable if the gifts exceed the nil-rate band — if the total gifts plus the death estate are within the NRB, there is no IHT to taper anyway.

Gifts with a reservation of benefit: If you give away an asset but continue to benefit from it (for example, you give your house to your children but continue to live in it rent-free), the gift is a "gift with reservation of benefit" and the asset remains in your estate for IHT purposes regardless of when the gift was made.

IHT Planning — Key Strategies

The main IHT planning strategies available to individuals and families include:

  • Make a will that uses both NRBs: Ensure the estate on the second death uses both the transferred NRB and the RNRB where available.
  • Use your annual and small gifts exemptions: Give away £3,000 per year (£6,000 in the first year if you have an unused carry-forward). Small amounts add up significantly over time.
  • Make regular gifts out of income: If you have surplus income, regular gifts to family members can be entirely IHT-free with proper documentation.
  • Consider lifetime gifting: Giving away assets at least 7 years before death removes them from your estate. Consider whether you can afford to do this without affecting your standard of living.
  • Use life insurance: A life insurance policy written in trust (outside the estate) can provide a lump sum to pay the IHT bill, preventing the need to sell assets to fund it.
  • Consider a Deed of Variation: After a death, beneficiaries can redirect their inheritance using a Deed of Variation within 2 years — useful for passing assets down a generation.
  • Seek specialist advice: For significant estates, tax planning with a qualified financial adviser and solicitor can save substantial amounts.

Note: IHT rules are complex and subject to change. Always seek qualified advice tailored to your specific circumstances before making significant decisions.

Frequently asked questions

My spouse died without using their nil-rate band — can I claim it?
Yes. You can claim a transferred nil-rate band from a deceased spouse or civil partner, even if they died many years ago. Apply using HMRC form IHT402 when you are dealing with the second estate. The transferred amount is calculated as a percentage of the nil-rate band in force at the time of the second death — so if your first spouse used none of their NRB, you can claim 100% extra (£325,000 additional NRB on top of your own £325,000). The same applies to the residence nil-rate band.
I gave away my house to my children but still live in it — is it outside my estate?
No. This is a "gift with reservation of benefit" and the house remains in your estate for IHT purposes. To remove it from your estate, you would need to either pay your children a full market rent, or move out entirely and not benefit from the property for 7 years. Gifts with reservation are a common IHT planning mistake — always take specialist advice before attempting to give away your home.
How does the residence nil-rate band interact with the main nil-rate band?
They are additive. You first apply the main NRB (£325,000) and then the RNRB (up to £175,000) on top. However, the RNRB only applies if a qualifying residential property passes to direct descendants. The RNRB is tapered by £1 for every £2 the estate exceeds £2 million, so very large estates receive little or no RNRB. For estates just over £2 million, this taper can create a marginal effective tax rate higher than 40%.
Are pensions subject to inheritance tax?
Currently, most pension funds sit outside the estate for IHT purposes because they are held under discretionary trust by the pension provider — the fund does not legally belong to you. However, from April 2027, the government has announced reforms that will bring most unused pension funds into the IHT calculation. Until then, pensions remain a very IHT-efficient way to pass wealth to the next generation. Seek updated specialist advice as the rule changes approach.

What to do next

  1. 1
    Calculate potential IHT using HMRC's tool

    HMRC's inheritance tax calculator to estimate your potential liability.

  2. 2
    Claim a transferred nil-rate band (form IHT402)

    HMRC form to claim a deceased spouse's unused nil-rate band.

  3. 3
    Understand the probate process

    How to apply for a Grant of Probate and administer an estate.

  4. 4
    Make a will to optimise your estate planning

    Why making a valid will is the foundation of IHT planning.

Official bodies and resources

Citizens Advice

Charity

Provides free, confidential, and independent advice on a wide range of issues including benefits, housing, debt, and employment.

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Disclaimer

This information is for general guidance only and does not constitute legal advice. You should seek qualified legal help if your situation requires it.