Charitable Giving and Inheritance Tax: How Leaving 10% to Charity Reduces Your IHT Rate from 40% to 36%

Introduction

Many UK individuals with estates above £500,000 believe that leaving money to charity reduces what their beneficiaries receive. The reality is quite different—and often counterintuitive.

If you leave at least 10% of your net estate to charity, Her Majesty's Revenue and Customs (HMRC) reduces the Inheritance Tax (IHT) rate on the remainder of your estate from 40% to 36%. For larger estates, this can mean that your non-charitable beneficiaries receive more, not less, even though you're giving to charity.

This relief came into effect on 6 April 2012 and remains one of the most underutilised planning opportunities in UK estate planning [1].

A Concrete Example

Consider an estate of £1 million:

• Without a charitable gift: IHT at 40% reduces the net distribution to beneficiaries to £600,000 (after a £325,000 nil-rate band is exhausted)
• With a £100,000 charitable legacy (10% of net estate): IHT at 36% on the remaining assets means beneficiaries receive approximately £648,000—£48,000 more, despite the charity receiving £100,000

This is not a modest benefit; it is a genuine tax relief that applies equally to both large estates and mid-range fortunes.

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How the 36% Rate Works: The Mechanics

The 10% Test

The reduced rate applies automatically when you satisfy the "charitable giving condition" or 10% test [2]. This test requires:

1. At least 10% of the net estate must be left to a qualifying charity or Community Amateur Sports Club (CASC)
2. The percentage is calculated against the baseline amount, not the gross estate

Understanding the Baseline Amount

The term "net estate" in inheritance tax planning does not mean what most people expect.

Net estate (formally the "baseline amount") is calculated as:

• Gross estate value
• MINUS the nil-rate band (currently £325,000)
• MINUS any spousal exemption (which is unlimited)
• MINUS any other reliefs (e.g., agricultural relief, business relief)
• MINUS all exemptions (charitable, annual, small gifts)
• But NOT including the residence nil-rate band (RNRB)

Crucially, the charitable gift itself is excluded from the baseline calculation, which creates planning opportunities.

A Worked Example: The £900,000 Estate

Element	Value
Gross estate	£900,000
Less: Nil-rate band	(£325,000)
Less: Spousal exemption	—
Less: Other reliefs	—
Baseline amount	£575,000
10% of baseline (minimum gift)	£57,500

If you leave £57,500 or more to charity:

• The remaining estate (£842,500) is charged to IHT at 36%, not 40%
• The charity exemption applies to the full £57,500
• Your beneficiaries pay IHT at 36% on approximately £842,500 net of reliefs

Tax saving at 36% vs. 40%: approximately £23,000 (the difference between 40% and 36% on ~£575,000)

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What Counts as a Qualifying Charity?

Not all charitable organisations are treated equally for IHT purposes. Since 15 March 2023, HMRC significantly tightened the rules.

UK-Registered Charities

A charity must be:

• Established for charitable purposes under UK law
• Registered with the UK Charity Commission (England and Wales), OSCR (Scotland), CCNI (Northern Ireland), or the Charity Commission for Northern Ireland [3]
• Managed by fit and proper persons

Gifts to UK-registered charities are fully exempt from IHT at any time, whether during life or on death.

Community Amateur Sports Clubs (CASCs)

CASCs registered with HMRC also qualify for the charitable exemption and the 36% reduced rate [3]. A CASC must:

• Be unincorporated or incorporated
• Be established or conducted for the purposes of participating in or promoting a "qualifying sport"
• Satisfy certain membership and profit-distribution tests
• Be registered with HMRC as a CASC

Foreign Charities: A Critical Change

Before 15 March 2023: Gifts to foreign charities qualified for the full IHT exemption and could trigger the 36% reduced rate.

After 15 March 2023: Gifts to foreign charities are no longer eligible for the IHT exemption or the 36% reduced rate, unless they are also registered as UK charities [3].

This is a critical point: if you intend to leave money to an international charity, you must first confirm whether they also operate as or are registered as a UK charity.

Verification

Before finalising your will, your solicitor should verify the charity's status using:

• The UK Charity Commission Register (www.charitycommission.gov.uk)
• HMRC's CASC register (for sports clubs)

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The Nil-Rate Band and the 36% Rate: Interaction and Order of Application

One of the most subtle—and misunderstood—aspects of the 36% relief is how it interacts with the nil-rate band.

The Order of Calculation

IHT is applied in this order [4]:

1. Charitable gifts are deducted entirely (100% exemption)
2. The nil-rate band is applied to remaining taxable estate
3. The remainder is charged at either 40% (standard) or 36% (if 10% test is met)

A Critical Point: The Baseline Does Not Include the RNRB

The residence nil-rate band (RNRB)—which allows up to £175,000 in additional relief for homes passed to direct descendants—is not included in the baseline for the 36% test [2].

This means:

• A £1 million estate with a £175,000 RNRB and a £325,000 standard nil-rate band reduces the baseline to £500,000
• The 10% test is assessed against £500,000, not £675,000
• This can mean a smaller charitable legacy (£50,000 instead of £67,500) triggers the reduced rate

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Multiple Estate Components: Survivorship, Settled Property, and Gifts with Reservation

On death, an estate may comprise three separate components for IHT purposes [2]:

1. Free estate (property owned outright at death)
2. Settled property (property held in trust, where the deceased had a beneficial interest)
3. Property subject to a gift with reservation of benefit (GWR)

Application of the 10% Test

The 10% test is applied to each component individually [2].

If an estate has multiple components, each must be assessed separately:

• Component A (free estate of £600,000): requires a £60,000 charitable gift to pass the 10% test
• Component B (settled property of £300,000): requires a £30,000 charitable gift from that component
• If only Component A meets the test, the 36% rate applies to Component A; Component B remains at 40%

Merging Components

However, HMRC permits merging of components to maximise the relief [2]. If an estate has multiple components but insufficient charitable gifts in one component to reach 10%, executors can:

• Elect to merge components
• Apply the charitable legacy across the merged baseline
• Potentially trigger the 36% rate for the entire merged amount

This is a valuable planning tool that should be discussed with tax advisors before probate is finalised.

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Deed of Variation: Redirecting an Inheritance to Charity After Death

What if the will was not drafted with a charitable legacy in mind, or family circumstances have changed since the will was made?

A deed of variation (also called a "deed of family arrangement") allows beneficiaries to vary the distribution of an estate after the deceased's death, while still achieving IHT benefits as if the deceased had made the change themselves.

How It Works

A deed of variation signed by all beneficiaries and executors can:

• Redirect a portion of a beneficiary's inheritance to charity
• Trigger the 36% reduced rate for the entire estate, even though the will made no charitable provision
• Be executed within two years of death [5]

Critical Requirement: Charity Notification

For the deed of variation to be effective for IHT purposes, the charity must be notified of its existence and the legacy directed to it [5].

Without notification:

• The deed does not trigger the 36% rate
• HMRC will not accept the variation for tax purposes
• The original will's tax position stands

Example: A Family Decision Post-Death

A spouse dies intestate with a £2 million estate. Under the intestacy rules, the surviving spouse inherits. However, the couple had spoken about supporting a particular charity. Within two years, the surviving spouse executes a deed of variation, redirecting £200,000 (10% of the net estate) to the charity. The deed is executed, the charity is notified, and HMRC accepts it. The result: the entire estate now qualifies for the 36% rate, saving the estate (and beneficiaries' inheritances) approximately £80,000 in IHT.

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Conditional Gifts to Charity: Risks and Drafting

Some testators wish to leave a gift to charity only if a condition is met—for example, "£100,000 to the XYZ Charity, if it continues to operate a food bank in Manchester."

The Risk

Conditional gifts to charity can create uncertainty around whether the charity actually receives the legacy. If the condition is not met, the gift lapses, and the amount reverts to the residue of the estate as a non-charitable distribution.

HMRC treats conditional gifts cautiously. If there is a material risk that the condition may not be satisfied, HMRC may not allow the full exemption or the 36% reduction on the assumption that the charity will receive the gift.

Best Practice

To avoid disputes:

• Use unconditional gifts to charities
• If conditions are important, use a supplementary letter of wishes to the charity trustees, but do not make the gift itself conditional
• Consult with tax advisors before drafting any conditional gifts; HMRC may challenge them on a full IHT return

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Worked Examples: Mid-Range and Large Estates

Example 1: The £900,000 Estate

Decedent: Margaret, age 74, widow, no dependent children. She owns:

• Family home: £450,000
• Investments and savings: £250,000
• Life insurance: £200,000
• Total gross estate: £900,000

Margaret wishes to support a cancer research charity and have her £500,000 of investments and savings split equally between her two adult children.

Planning Option A: Without charitable legacy

• Nil-rate band: £325,000
• Taxable estate: £575,000
• IHT at 40%: £230,000
• Net to beneficiaries: £670,000

Planning Option B: With £60,000 charitable legacy (10% of baseline)

• Nil-rate band: £325,000
• Charitable gift: £60,000 (to cancer research charity)
• Remaining taxable: £515,000
• IHT at 36%: £185,400
• Net to beneficiaries: £654,600 (plus £60,000 to charity)
• Tax saving: £44,600

Margaret now has £44,600 more to distribute to the charity than if she had made no bequest, while still leaving her children with £654,600 (only £15,400 less than without the charitable gift).

Example 2: The £2.5 Million Estate

Decedent: James, age 68, married. He owns:

• Principal residence (passing to surviving spouse): £800,000
• Commercial property (to children): £1,000,000
• Investments and liquid assets: £700,000
• Total gross estate: £2,500,000

James and his wife have decided to leave a portion to a heritage conservation charity they support.

Planning Option A: Without charitable legacy

• Nil-rate band: £325,000
• Spousal exemption: £800,000 (principal residence)
• Taxable estate: £1,375,000
• IHT at 40%: £550,000
• Net to children and spouse: £1,950,000

Planning Option B: With £137,500 charitable legacy (10% of baseline)

• Nil-rate band: £325,000
• Spousal exemption: £800,000
• Charitable gift: £137,500 (to heritage charity)
• Remaining taxable: £1,237,500
• IHT at 36%: £445,500
• Net to children and spouse: £2,054,500 (plus £137,500 to charity)
• Tax saving: £104,500

Again, the presence of the charitable gift (£137,500) generates an absolute tax saving of £104,500 for the estate.

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Legacy Planning in Wills: Mechanics and Drafting

Types of Charitable Bequests

Your will can leave money to charity in three ways:

1. Fixed Sum

"I give £50,000 to the National Trust, charity number 1234567."

• Advantages: Simple, predictable, no flexibility
• Disadvantages: Not inflation-adjusted; if the estate is smaller than expected, beneficiaries bear all the loss

2. Percentage of Estate

"I give 10% of my net estate to the World Wide Fund for Nature, charity number 1081247."

• Advantages: Automatically adjusts with the size of the estate
• Disadvantages: May create uncertainty about the exact amount; beneficiaries' shares may fluctuate

3. Residuary Gift

"I give the whole of the residue of my estate to the British Red Cross, charity number 220949."

• Advantages: Clean structure; disposes of all remaining assets
• Disadvantages: No inheritance to non-charitable beneficiaries; must be combined with fixed or percentage gifts if any non-charitable beneficiaries are intended

Best Practice Drafting

To ensure the charitable gift triggers the 36% relief:

1. Name the charity and its charity registration number (verified before execution)
2. Specify whether the gift is from the free estate or a specific fund
3. Clarify that the gift is absolute and unconditional, unless specific conditions are essential
4. Update the will if charity registrations change (though name changes rarely affect the relief)
5. Instruct executors to notify HMRC of the charitable gift on the IHT400 return and to provide proof of the charity's status

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Myths vs. Reality

Myth 1: "Leaving money to charity costs my estate money."

Reality: If you leave 10% or more to charity, your beneficiaries often receive more because the IHT rate on the remainder drops from 40% to 36%. A £100,000 charitable gift can save £44,000+ in IHT, leaving net distributions to beneficiaries nearly unchanged or improved.

Myth 2: "Only large estates benefit from the 36% relief."

Reality: Even mid-range estates of £500,000–£1 million see substantial savings. The relief applies equally whether the estate is £600,000 or £6 million.

Myth 3: "Foreign charities qualify for the relief."

Reality: Since 15 March 2023, only UK-registered charities and UK CASCs qualify. A gift to a foreign charity, even a well-known international organisation, will not trigger the 36% relief or reduce IHT liability.

Myth 4: "I must decide on a charitable gift now; I can't change my mind after I die."

Reality: Within two years of death, beneficiaries can execute a deed of variation to redirect an inheritance to charity, triggering the 36% relief even if the original will made no charitable provision.

Myth 5: "If I leave a small amount to charity, it won't make a meaningful difference."

Reality: The 10% test is a threshold, not a graduated relief. Leaving exactly 10% triggers the full 36% rate on the remainder. Even a £40,000 gift can qualify a £400,000 estate for the relief.

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Frequently Asked Questions

Q1: How is "10% of the net estate" calculated if my estate includes assets abroad?

A: The baseline amount is calculated using the entire estate's value at death, including worldwide assets. Foreign property, foreign investments, and foreign bank accounts are all included in the calculation. The 10% calculation is based on the total net estate after all reliefs, exemptions, and the nil-rate band are applied.

Q2: If I leave 10% to one charity and 5% to another, do I qualify for the reduced rate?

A: Yes. The test is that 10% or more of the net estate goes to any combination of qualifying charities. You could leave 5% to Oxfam, 3% to the National Trust, and 2% to a local food bank, and the 36% relief would apply.

Q3: Can I use the 36% relief if my estate includes property on which agricultural relief or business relief applies?

A: Yes, but with a caveat. Agricultural and business reliefs reduce the taxable estate (and therefore the baseline amount), which affects the 10% calculation. If an estate is £1 million but includes agricultural property worth £300,000 with 100% relief, the baseline is reduced accordingly, and 10% is calculated on that lower baseline. Consult a specialist advisor on the precise interaction.

Q4: If my spouse inherits everything, do I lose the opportunity for the 36% relief?

A: Not necessarily. The surviving spouse can, within two years, execute a deed of variation to redirect a portion to charity, triggering the 36% relief on the estate. This is a valuable post-death planning tool if circumstances change.

Q5: Does the 36% relief apply if I make a gift to charity during my lifetime?

A: No. The reduced rate of 36% applies only to gifts made on death (i.e., through a will, deed of variation, or intestacy). Gifts to charity during lifetime are fully exempt from IHT, but they do not trigger the 36% reduced rate. The 36% relief is a relief on the death estate only.

Q6: If the charity closes or merges after my death, does my gift still qualify for the relief?

A: If the charity ceases to be a qualifying charity before probate is granted, HMRC may disallow the exemption. However, if the charity merges with another qualifying charity, the relief typically continues. Executors should seek HMRC clearance if a named charity ceases to exist before probate.

Q7: Can I leave a gift "to my favourite charity" without naming it, and still get the relief?

A: No. Your will must name the specific charity and provide its charity registration number. A vague bequest will not satisfy HMRC's requirements and may result in the executors applying to court for interpretation. Always use the formal name and charity number.

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Disclaimer

This article is provided for general information only and does not constitute legal, tax, or financial advice. The rules around Inheritance Tax, charitable reliefs, and the 36% reduced rate are complex and depend on individual circumstances, the structure of your estate, and specific charity registrations.

Before implementing any charitable legacy strategy, consult with:

• A qualified solicitor specialising in wills and probate
• A tax advisor or accountant familiar with Inheritance Tax planning
• The specific charities you intend to benefit

Laws and regulations are subject to change. This information reflects the position as of 28 April 2026. Tax rules may be updated by Parliament or HMRC guidance clarified. Always verify the current position with a qualified professional before finalising your estate plan.