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UK inheritance tax rules can leave unmarried partners and people without a spouse or civil partner with fewer routes to use or transfer certain allowances. The source report also cites ONS figures showing the number of people living alone rose to 8.6 million in 2025, though living alone does not by itself determine an individual’s tax bill.
A MoneyWeek report has highlighted that people who are single, and couples who are not married or in a civil partnership, may have fewer ways to use or transfer certain UK inheritance tax allowances than married couples and civil partners. The issue affects how much of an estate may be exposed to tax, although a person’s actual liability depends on their circumstances and the rules in force when they die.
The report cites Office for National Statistics data showing that 8.6 million people lived alone in the UK in 2025, compared with 7.7 million in 2015. People living alone represented 29.5% of households in 2025, up from 28.6% in 2015. Those figures describe household arrangements; they do not show how many people owe inheritance tax or how large any tax bill is.
The tax issue raised by MoneyWeek is that married couples and civil partners can benefit from rules that allow certain unused inheritance tax allowances to be transferred to a surviving spouse or civil partner. Unmarried partners do not receive the same treatment solely because they live together. A person without a spouse or civil partner also cannot transfer an unused allowance to a surviving partner under those rules.
That difference may matter when an estate is assessed, but relationship status is only one factor. The value and composition of the estate, applicable allowances and other relevant circumstances all affect whether inheritance tax is due. The supplied report does not provide individual case calculations, tax estimates or details of any proposed change to the rules.
How Relationship Status Affects Allowances
The difference matters because allowances that can be transferred between spouses or civil partners may help reduce the portion of an estate subject to inheritance tax after one partner dies. For an unmarried couple, living together does not in itself provide that transfer option. A surviving partner could consequently face a different tax position from a legally married or civil-partnered survivor with otherwise comparable circumstances.
For people living alone, the issue is different: without a spouse or civil partner, there is no surviving partner to receive a transferred allowance under the rules described. This does not mean every single person will owe tax. It does mean that people should not assume the allowances available to a married couple apply to them, and that estate planning may need to reflect their legal relationship status.
The ONS trend gives the question broader relevance: more people are living alone than a decade earlier. But the figures are demographic, not tax data. They cannot establish how many people are affected, the size of any additional bill, or whether single households are more likely to have estates above relevant thresholds.
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The Household Trend Behind the Report
MoneyWeek’s report links the inheritance tax issue to a rise in the number and share of UK households with one person living in them. The ONS figures cited show an increase from 7.7 million people living alone in 2015 to 8.6 million in 2025. The share of households recorded as single-person households rose from 28.6% to 29.5% over the same period.
The report also notes that people living alone may be more exposed to rising essential costs, including food, energy and transport, because they do not share those household expenses with another person. That observation is separate from inheritance tax: higher day-to-day costs do not determine tax liability, and the source provides no figures quantifying their effect on savings or estates.
The inheritance tax point concerns the legal distinction between spouses or civil partners and unmarried partners. Cohabitation alone does not confer the same transfer treatment. The report’s focus is therefore not that single status automatically creates a tax charge, but that some people may have fewer allowance-sharing options than couples with a legally recognised relationship.
What the Figures Do Not Show
The supplied report does not specify an individual’s likely tax bill, give examples comparing otherwise identical estates, or quantify how much additional tax an unmarried partner might pay. The ONS figures count people and household types; they do not measure inheritance tax exposure or identify how many people fall above relevant thresholds.
The source material also does not set out the full range of applicable allowances, exceptions or estate-planning options, and it does not report a new policy announcement. Tax rules can depend on individual circumstances and may change. Readers should not treat the general comparison as a calculation of their own liability.
Checking an Estate’s Tax Position
No further policy development or official response is described in the supplied material. The immediate practical step for readers is to establish which rules apply to their circumstances and whether their estate may be affected. That can include checking the legal status of a partnership, the estate’s assets and liabilities, and whether any transferable allowances are relevant.
Anyone seeking a personal estimate should consult current official guidance or a qualified adviser, particularly where an estate includes property, jointly held assets or other circumstances not covered in the report. Any calculation should use current rules; the ONS household figures provide demographic context, not a forecast of future inheritance tax bills.
Key Questions
Does being single automatically mean I will pay inheritance tax?
No. Being single does not automatically create an inheritance tax bill. Liability depends on the estate and the rules and allowances that apply to the individual circumstances.
Do unmarried partners receive the same allowance-transfer treatment as spouses?
According to the MoneyWeek report, unmarried partners do not receive the same transfer treatment solely because they live together. The report identifies marriage or civil partnership as the relevant legal distinction for transferring certain unused allowances.
How many people in the UK lived alone in 2025?
The ONS figures cited by MoneyWeek say 8.6 million people lived alone in the UK in 2025, compared with 7.7 million in 2015. The figures describe living arrangements, not inheritance tax payments.
Does living alone mean a larger inheritance tax bill?
Not necessarily. Living alone does not by itself establish that tax is due. It may mean a person has no spouse or civil partner to receive a transferred allowance, but the estate and applicable rules determine the tax position.
Source: moneyweek.com
