How do inheritance tax thresholds work?
Inheritance tax (IHT) in the UK is charged on the value of an estate above a threshold when someone dies. The structure involves several allowances that interact, which is why the commonly quoted figures vary.
The nil-rate band. Each individual has an allowance below which no IHT is due — £325,000, frozen for an extended period. Above it, the standard rate is 40%.
The residence nil-rate band. An additional allowance — up to £175,000 — applying where a main residence is left to direct descendants: children, stepchildren, adopted children, grandchildren. It does not apply if property passes to siblings, nieces, nephews or friends.
It tapers away for estates above £2 million, reducing by £1 for every £2 over, so larger estates lose it entirely.
Transferable allowances — the point that changes everything. Anything unused on the first death transfers to the surviving spouse or civil partner. Since transfers between spouses are themselves exempt, the first death typically uses no allowance at all.
The practical result: a married couple leaving a home to children can often pass up to £1 million before IHT applies, combining two nil-rate bands and two residence bands.
Key exemptions:
Spouse or civil partner — completely exempt.
Charities — exempt, and leaving 10% or more of the net estate reduces the rate on the remainder to 36%.
Annual gifting allowance of £3,000, small gifts, wedding gifts, and regular gifts out of surplus income, which is generous and underused.
The seven-year rule. Most gifts become exempt if you survive seven years. Between three and seven years, taper relief reduces the tax on the gift — note it reduces the tax, not the value of the gift itself, which is widely misunderstood.
Business and agricultural property reliefs exist and have been subject to reform.
Rules change frequently. Take professional advice.