How Inheritance Tax Works in the UK: A Guide for London Property

Quick answer: Inheritance tax in the UK is charged on the value of an estate above the available tax-free allowances. For London property owners, the family home is often the main reason an estate crosses the threshold. The standard nil-rate band and, where it applies, the residence nil-rate band for homes left to direct descendants, determine how much tax is due. Married couples can usually pass assets between themselves free of inheritance tax.

For many London homeowners, inheritance tax becomes a real issue long before they think of themselves as wealthy. A family home in Richmond, Camden, Islington, or Wimbledon can push an estate above the IHT threshold simply because London property values have risen so sharply over time.

This guide explains how inheritance tax UK rules work, how probate and inheritance tax connect, and what practical steps may help reduce risk. It is written for property owners who want clear, useful guidance without legal jargon.

What is inheritance tax in the UK?

Inheritance tax is a tax on a person’s estate after they die. Their estate includes property, savings, investments, personal belongings, and in some cases gifts made before death.

In broad terms, inheritance tax UK rules look at the total value of the estate, deduct available reliefs and exemptions, and then apply tax to the part above the relevant allowances. The commonly quoted rate is 40%, but the actual position depends on the estate structure, who inherits, and whether any exemptions apply.

For many families, the tax problem is not cash in the bank. It is the home. A house bought years ago near a Tube line in Wimbledon, or a flat in Camden, may now be worth enough to bring the estate into scope for a significant bill.

Why London property owners face a distinct challenge

London homeowners face a particular issue: property growth can create inheritance tax exposure even where the family’s day-to-day lifestyle does not feel especially affluent.

A home that once seemed ordinary can now form the bulk of a taxable estate. That is especially relevant for older owners who bought decades ago in boroughs that have seen strong capital growth. Many London families are asset-rich but cash-poor, which can make tax planning and payment more difficult.

This affects family decisions about whether to keep or sell a property, whether to gift assets during lifetime, whether children will inherit the home or need to sell it to pay the tax bill, and how executors fund inheritance tax during probate. Our guide on executor duties covers how that tax obligation sits within the wider estate administration process.

How the IHT threshold works

Nil-rate band and residence nil-rate band

The IHT threshold usually starts with the nil-rate band: the basic tax-free allowance on the estate. There may also be a residence nil-rate band where a qualifying home is left to direct descendants, such as children or grandchildren. A surviving spouse or civil partner may also be able to use unused allowances from the first death.

People often hear one headline figure and assume it applies automatically. It does not. The residence nil-rate band has conditions, and larger estates can lose part of it. The best starting point is checking the value of the whole estate, whether there is a qualifying residence, who inherits the property, and whether any spouse or civil partner allowances transfer.

How probate and inheritance tax work together

Probate is the legal process of dealing with a deceased person’s estate. Inheritance tax is often one of the key issues that must be handled during that process.

Executors usually need to value the estate, report the value to HMRC, calculate whether inheritance tax is due, and arrange payment, at least in part, before probate can be completed in full. If there is property in the estate, accurate valuation matters. If there is tax to pay, the executors may need to find funds before assets are sold or transferred.

That can be stressful where most wealth is tied up in a London property rather than liquid savings. Our step-by-step guide on how to apply for probate in London covers this process in full.

How inheritance tax on property is assessed

Inheritance tax on property is usually based on the property’s market value at the date of death. HMRC expects a realistic open market valuation.

For London homes, that can be more complex than many people expect. Values can vary significantly street by street, even within the same borough. A period conversion in Richmond, a flat near Hampstead Heath, and a terraced house in Wimbledon may all require careful valuation evidence. If the valuation is too low, HMRC may query it. If it is too high, the estate may pay more tax than necessary.

Gifting and inheritance tax

Many people ask how to avoid inheritance tax by giving assets away during their lifetime. Gifting can help, but only if the rules are followed.

A major trap is giving away your house but continuing to live in it as before. That can amount to a gift with reservation of benefit, meaning the property may still be treated as part of your estate for inheritance tax purposes. Some gifts are covered by exemptions. Larger gifts may only fall outside the estate after a set period. Records matter. Not all gifts produce the result people expect.

The gifting rules for inheritance tax are technical. Poorly planned transfers can fail to achieve the intended outcome, or create other complications for the estate.

Planning ahead: the sensible first steps

There is no single best approach for every homeowner. The right plan depends on your family, your property, your age, your health, and whether your priority is tax efficiency, control, or simplicity.

In many cases, the sensible first step is a review of your will, property ownership structure, and likely inheritance tax exposure. A well-drafted will is often one of the most cost-effective pieces of estate planning available. An LPA is another step worth taking alongside it. See our family guide to lasting powers of attorney for more on that.

Good estate planning balances tax, family needs, control, and practical administration after death. Early advice matters because some options close off as circumstances change.

Frequently asked questions

Do I pay inheritance tax if I inherit my parents’ house in London?
Not usually as the beneficiary directly. Inheritance tax is generally paid by the estate before assets are distributed. The key question is whether the estate exceeds the available allowances.

Can I give my house to my children to avoid inheritance tax?
Sometimes gifting helps, but it is not simple. If you continue living in the property without proper arrangements, it may still count as part of your estate.

Do married couples pay inheritance tax in the UK?
Transfers between spouses and civil partners are usually exempt. In addition, unused allowances from the first death may often transfer to the survivor’s estate.

How long after death must inheritance tax be paid?
Inheritance tax deadlines are strict, and payment often needs attention early in the estate administration process. Executors should act quickly and take advice where needed.

When should I speak to a solicitor about inheritance tax?
Consider speaking to a solicitor if your estate includes London property, if your will is outdated, if you are thinking about gifting your home, or if you want to protect family wealth while keeping arrangements practical.

For many London property owners, the family home is the main reason an estate moves above the inheritance tax threshold. Early planning can make a real difference. Contact Freeman Harris for clear, tailored advice on inheritance tax, wills, probate, and estate planning.

Related: How to Apply for Probate | Writing a Will in London | Executor Duties Explained