Inheritance Tax Calculator

Calculate UK inheritance tax (IHT) liability using IHT400 form rules with nil-rate band, spouse exemption, and gift allowances.

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About This Tool

This IHT400 calculator helps you estimate UK inheritance tax liability based on current HMRC rules. It calculates the nil-rate band, spouse exemption, lifetime gifts, and property deductions to determine the taxable estate and tax due. The tool follows official IHT400 form calculations for accurate results, including the residence nil-rate band and taper relief for gifts. Perfect for estate planning or understanding potential tax obligations.

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How to Use

Enter the total value of the estate
Specify if there's a surviving spouse/civil partner for exemption
Add any lifetime gifts made in the last 7 years
Include property value and any applicable reliefs
Click 'Calculate IHT' to see detailed tax breakdown
Review results including nil-rate band usage and tax liability

Frequently Asked Questions

Find Quick Answers

What is the IHT400 form?

IHT400 is the main UK inheritance tax form used to report estate details to HMRC when inheritance tax may be due.

What is the current nil-rate band?

The standard nil-rate band is £325,000 (frozen until 2028). An additional residence nil-rate band of £175,000 may apply for main residences passed to direct descendants.

Are gifts to spouses exempt from inheritance tax?

Yes, gifts between spouses/civil partners are completely exempt from inheritance tax with no limit.

How are lifetime gifts taxed?

Gifts made within 7 years of death may be subject to inheritance tax with taper relief reducing the tax rate after 3 years.

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