Does My Spouse Pay Inheritance Tax When I Die?

For married couples and civil partners, the short answer is reassuring: leaving your estate to your other half creates no inheritance tax at all. The spouse exemption lets you pass any amount, a modest flat or a multi-million-pound estate, to a UK-domiciled husband, wife or civil partner completely tax-free. There is no cap, no form to file for the exemption itself, and no 40% charge on the transfer. The tax question is simply deferred to the second death, when the couple’s combined allowances come into their own. What follows explains how that works, and the two situations where the rules bite differently.

How the exemption works

Inheritance tax is charged on an estate above its available allowances, but transfers between spouses are carved out entirely. So if you leave everything to your partner, their estate absorbs it without a bill. Crucially, your own nil-rate band (£325,000) and residence nil-rate band (£175,000) are not wasted, the unused percentage transfers to the survivor. When they later die, their executors can claim up to two of each, which is how a couple reaches the headline £1 million tax-free. You can see the full arithmetic in our guide to inheritance tax for married couples.

The two situations to watch

First, the exemption depends on legal status. Cohabiting partners, even after decades together, receive no spouse exemption, so planning with wills, life cover and sometimes trusts matters far more. Second, there is a limit where the receiving spouse is not UK-domiciled: transfers to a non-domiciled spouse are exempt only up to a capped amount unless they elect to be treated as UK-domiciled. Most couples are unaffected, but cross-border families should take advice.

It is also worth remembering that the exemption defers rather than deletes the tax. Everything you leave your spouse simply lands in their estate, and the 40% question returns when they die. That is why couples often plan together, using gifts, pensions and reliefs across both estates. Our inheritance tax planning pages and the complete guide to inheritance tax planning set out the options, and a vetted adviser can model both estates as one plan.

What happens on the second death

Because the exemption defers the tax, the practical planning happens around the survivor’s estate. When the second partner dies, their executors can claim the unused percentage of the first partner’s nil-rate band and residence band. Note that it is a percentage, not a fixed sum: if the first person used, say, 20% of their nil-rate band on gifts to others, 80% transfers, and because the band may be higher by then, the survivor benefits from the figure in force at that time. In practice, most couples who leave everything to each other pass on 100% of both bands, reaching the £1 million ceiling where a home goes to their children.

This is also why couples are usually advised to keep the paperwork from the first death, the grant of probate, the will and a note of any significant gifts, sometimes for decades. Executors who cannot evidence the first estate can struggle to claim the transfer, needlessly increasing the eventual bill. A short letter of wishes and a well-organised file can save a great deal of time and money later.

Planning as a couple, not two individuals

The most effective inheritance tax planning treats a couple’s wealth as a single problem with two stages. Options include using the annual gift exemptions of both partners, sharing assets so each person’s allowances are used efficiently, considering life cover written in trust to meet a future bill, and with pensions due to enter estates from April 2027, reviewing how retirement pots are nominated. Our guide to reducing inheritance tax legally and the inheritance tax hub set out the wider toolkit.

Every family’s position differs, particularly for second marriages, blended families, or where children from a previous relationship are involved, situations in which a simple “everything to each other” will can produce unintended results. Those cases genuinely benefit from tailored advice rather than a template.

This is information, not personal advice; the right approach depends on your circumstances, and tax rules can change. Vetted Wealth matches you, free of charge, with independently vetted, FCA-regulated advisers who plan for couples routinely.

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