Can unused inheritance tax threshold be transferred?

Can unused inheritance tax threshold be transferred?

Yes, in many cases an unused inheritance tax threshold can be transferred to a surviving spouse or civil partner. This is often referred to as the unused nil-rate band. It can help reduce the amount of inheritance tax due when the second partner dies.

The nil-rate band is the amount of an estate that can usually be passed on before inheritance tax is charged. If the first spouse or civil partner does not use all of their allowance, the unused portion may be added to the survivor’s allowance later.

How the transfer works

When the first partner dies, anything left to a surviving spouse or civil partner is normally exempt from inheritance tax. That means their nil-rate band may remain unused. The unused percentage can usually be carried forward to the survivor’s estate.

This does not mean the exact cash amount is transferred. Instead, HMRC uses the percentage of the allowance that was unused at the first death. That percentage is then applied to the nil-rate band available when the second person dies.

What this can mean for families

For many couples, this can effectively double the inheritance tax threshold available to the surviving partner. If both nil-rate bands are fully unused, the estate may benefit from two allowances instead of one. This can make a significant difference to tax planning.

It may also be possible to combine this with the residence nil-rate band in certain situations. This extra allowance can apply when a main home is passed to direct descendants. However, the rules are more limited and should be checked carefully.

When the transfer is not automatic

The unused threshold is not always applied automatically. Personal representatives may need to claim it from HMRC after the second death. They usually need details from both estates to show how much of the first allowance was unused.

Records such as the first spouse’s will, grant of probate, and inheritance tax forms may be needed. If the first death happened many years ago, it can still be claimed, but keeping paperwork can make things much easier.

Points to watch

The transfer only applies between spouses and civil partners. It does not pass between unmarried partners, even if they lived together for many years. This is an important distinction for estate planning in the UK.

Some estates may also use trusts, lifetime gifts, or reliefs such as business property relief. These can affect how much of the nil-rate band is left unused. Because inheritance tax rules can be complex, it is often sensible to get professional advice.