Inheritance tax calculator
Estimate potential inheritance tax liability based on the value of your estate.
Estate Assets
£
£
£
Liabilities & Exemptions
£
£
Reliefs & Allowances
Married / Civil Partner
Transfer unused nil-rate band from spouse
+£325k
Residence Nil-Rate Band
Leaving main home to direct descendants
+£175k
Spouse RNRB Transfer
Transfer unused RNRB from deceased spouse
+£175k
10%+ Left to Charity
Reduces IHT rate from 40% to 36%
36% rate
Business Property Relief
100% relief on qualifying business assets
100% off
Agricultural Property Relief
Relief on qualifying agricultural property
100% off
IHT Estimate
IHT Due
—
at 40% on taxable estate
Estate to Beneficiaries
—
after tax
Gross Estate
—
before reliefs & tax
Estate breakdown
Debts & exemptions
Nil-rate band (£325k)
RNRB allowance
Taxable at 40%
Estate Calculation
Property value—
Savings & investments—
Less: outstanding debts—
Net chargeable estate—
Allowances & Thresholds
Nil-rate band£325,000
Spouse transferred NRB—
Residence nil-rate band—
Spouse transferred RNRB—
Total tax-free threshold—
Taxable above threshold—
IHT rate applied—
Inheritance tax due—
IHT Planning Considerations
This calculator uses 2025/26 HMRC thresholds: nil-rate band £325,000; residence nil-rate band £175,000. It provides an illustrative estimate only and does not constitute financial or legal advice. IHT rules are complex — factors such as trusts, business relief, taper relief on gifts, and domicile status can significantly affect your liability. Always consult a qualified financial adviser or solicitor for personalised estate planning guidance.