How does the Inheritance Tax Calculator work?

IHT = 40% × (estate value − total nil-rate bands) Then: Standard nil-rate band: £325,000 (frozen until 2028) Then: Residence nil-rate band (RNRB): £175,000 — for a main home left to children, grandchildren etc. Then: Married couples / civil partners: unused nil-rate bands transfer to survivor, potentially doubling to £650,000 + £350,000 RNRB = £1,000,000.

Can you give an example of how to use the Inheritance Tax Calculator?

Example: Input Estate £500,000, includes property, single gives a result of £0 IHT (£325K + £175K RNRB = £500K — exactly covered).

Is the Inheritance Tax Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Inheritance Tax Calculator?

Our Inheritance Tax Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

Is this Inheritance Tax Calculator accurate for my country?

This calculator uses general tax principles as a guide. Tax laws vary by country and are updated frequently — always verify with your national tax authority or a qualified tax professional.

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Inheritance Tax Calculator

Inheritance Tax Calculator (UK 2024/25)

Total estate value (£)

Estate includes a residential property (main home)Use transferred nil-rate band (deceased spouse / civil partner)

Inheritance Tax (IHT) is charged at 40% on the value of an estate above the nil-rate band thresholds. The standard nil-rate band is £325,000. An additional residence nil-rate band of £175,000 applies when a main home is left to direct descendants. Married couples can transfer unused allowances to their surviving spouse.

Symbol	Name	Unit	Description
IHT	40% × (estate value − total nil-rate bands)	—	40% × (estate value − total nil-rate bands)

Allowance	Amount	Condition
Standard NRB	£325,000	All estates
Residence NRB	£175,000	Main home to direct descendants
Transferred NRB (spouse)	+£325,000	If unused at first death
Transferred RNRB (spouse)	+£175,000	If unused at first death
Maximum combined	£1,000,000	Married couple with property

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Pro Tip

Charitable donations of 10%+ of the net estate reduce the IHT rate to 36% on the remainder. Life insurance written in trust does not form part of the estate and can cover the IHT bill.

References

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Inheritance Tax Calculator

Inheritance Tax Calculator (UK 2024/25)

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Inheritance Tax Calculator (UK 2024/25)