Inheritance tax worries many couples, especially when the family home and a lifetime of savings are added together. The good news is that married couples and civil partners are treated more generously than almost anyone else in the system. At the heart of that treatment sits the spouse exemption, which allows partners to leave everything to each other free of inheritance tax. This guide explains how inheritance tax for married couples works in practice, how the spouse exemption and transferable allowances fit together, and the points couples who own property should plan for while they are both alive.
How Inheritance Tax Works for Married Couples
Inheritance tax is charged on a person’s estate when they die: broadly, everything they own minus what they owe, including property, savings, investments and possessions. Each individual has a tax-free threshold, often called the nil-rate band, and estates worth more than the available thresholds can face tax on the excess. There is also an additional threshold linked to a main home left to children or other direct descendants. For single people, planning is about using those thresholds well. For married couples and civil partners, the picture is different, because anything left to a husband, wife or civil partner is normally exempt, and any unused thresholds can usually be passed on to the surviving partner as well. The result is that tax is rarely due on the first death in a marriage, and the real planning question is what happens on the second death. Our guide to inheritance tax on property looks at the property side of the estate in more detail.
The Spouse Exemption Explained
The spouse exemption means that gifts and inheritances between married couples and civil partners are exempt from inheritance tax, whether they are made during your lifetime or under your will. There is no cap on the amount that can pass between spouses in this way, so a surviving partner can inherit the family home, savings and investments without an inheritance tax bill on that transfer. Two cautions are worth knowing. First, the exemption applies to legal marriages and civil partnerships only: couples who live together without marrying do not qualify, however long they have been together. Second, where one partner is domiciled or treated as long-term resident outside the UK and the other is not, the exemption can be restricted, and special elections may be needed to restore the full exemption. Cross-border couples should always take specific advice, because the rules in this area have changed in recent years and the outcome depends on both partners’ residence history.
Transferring Unused Allowances to the Surviving Partner
Because the first spouse usually needs none of their tax-free thresholds (everything passes under the exemption), those thresholds would be wasted without a second rule: the transferable nil-rate band. Any percentage of your threshold that you do not use can be transferred to your surviving spouse or civil partner, increasing the threshold available when they die. The same applies to the extra threshold for a main home left to direct descendants: if it is not needed on the first death, the unused proportion can be claimed on the second. In practice, this means a couple’s combined estate is assessed against both partners’ allowances when the second partner dies, which is why the tax bill, if any, usually falls due at that point. The survivor’s executors must claim the transferred allowances and will need records from the first death, including the will and any probate paperwork, so keeping those documents safe matters. Timing can matter too, and our guide to the UK tax year explains the dates and deadlines that frame most personal tax planning.
What This Means for the Family Home and Other Property
For most couples, the largest asset passing between them is the home. How you own it matters for administration more than for the exemption itself: property held jointly usually passes automatically to the survivor, while property owned in defined shares passes under the will or the rules of intestacy. Either way, a transfer to a spouse or civil partner is covered by the exemption. The position needs checking where a home is leasehold, jointly owned with children, or held through a company or trust, so it is worth understanding the difference between leasehold and freehold ownership when you review your arrangements. Couples who also hold rental or investment property should think about whose name assets sit in and how rental income is taxed during their lifetimes, because the exemption only deals with tax at death. Partners who are building a portfolio together may find our guide to property investment with little money a useful starting point for structuring purchases sensibly from the outset.
Common Misunderstandings About the Spouse Exemption
Several myths cause expensive mistakes. The first is assuming the exemption covers gifts to children: it does not. Gifts to anyone other than a spouse or civil partner can be taxable if you die within the following years, subject to the gift rules and exemptions that apply at the time. The second is assuming a will is unnecessary because “everything goes to my partner anyway”: the exemption applies to whatever passes to your spouse, but without a will the intestacy rules decide how much that is, and part of the estate could pass directly to children instead, using up thresholds early and complicating the survivor’s position. The third is assuming cohabiting partners are treated as married: they are not, and a surviving partner in an unmarried couple can face a bill that a spouse would never see. Finally, remember that the exemption defers tax rather than removing the estate from the system forever: on the second death, the combined estate is tested against the combined allowances, which is why lifetime planning still matters for larger estates.
Planning Ahead as a Couple
Sensible planning for married couples is mostly about records, wills and timing. Keep up-to-date wills that reflect how you actually own your assets, and review them after big changes such as buying or selling property, retirement, or grandchildren arriving. Keep the first spouse’s probate documents permanently, because the transferable allowances are claimed with paperwork, not automatically. If your estate is likely to exceed your combined allowances when the second of you dies, look at lifetime options early: using gift exemptions, considering how assets are split between you, and checking whether any business or agricultural assets in the family attract their own reliefs. Because thresholds, residence rules and reliefs change, couples with property, investments or a partner from overseas should review their position with a specialist. Our guide to finding an inheritance tax accountant explains what good advice covers and the questions to ask. The spouse exemption gives married couples a powerful starting point, but it works best as part of a plan the two of you have actually written down.
