The Residence Nil Rate Band: Your Complete Guide

The Residence Nil Rate Band (RNRB) was introduced in 2017 as an additional inheritance tax allowance for individuals who leave a qualifying residential property to direct descendants. It has added significant value to estate planning for many UK families — but its conditions are specific and easy to fall foul of, particularly for internationally mobile individuals whose family circumstances do not fit the standard pattern.

This guide explains how the RNRB works in full, the conditions that must be met, the taper for larger estates, the downsizing addition, and the key international complications.

The Basic Allowance

The RNRB is £175,000 per individual in 2026–27, and has been frozen at that level until at least April 2031 under current government plans. It is an additional allowance on top of the standard nil-rate band of £325,000. For an individual, the combined allowance is therefore £500,000 — meaning the first £500,000 of an estate (including a qualifying residence) passing to direct descendants can potentially be free of IHT.

For a married couple or civil partners, the situation is more valuable. The standard nil-rate band and the RNRB are both transferable between spouses on the first death (if unused). On the second death, the surviving spouse's estate can benefit from:

• Their own standard nil-rate band: £325,000
• The transferred unused nil-rate band from the first spouse: up to £325,000
• Their own RNRB: £175,000
• The transferred unused RNRB from the first spouse: up to £175,000

Total: up to £1,000,000 before any IHT is due — provided the qualifying conditions are met.

This means couples with modest estates and a home left to children may pay no IHT at all, even without sophisticated planning.

The Qualifying Conditions

The property must be a qualifying residence. The property must be a residential property that was or has been the deceased's main residence at some point during their ownership. An investment property that was never lived in by the deceased does not qualify. A former home that was the deceased's main residence at some point — even if they moved elsewhere before death — can qualify.

The residence must be "closely inherited." The property must pass on death to one or more "lineal descendants" of the deceased. Lineal descendants include:

• Children (including adopted children, but not stepchildren unless legally adopted)
• Grandchildren and further descendants
• Step-children who have been legally adopted
• The spouses or civil partners of the above (but not ex-spouses)

Beneficiaries who do not count as lineal descendants include: siblings, nephews and nieces, friends, domestic partners (outside civil partnership), and non-adopted stepchildren.

The property must pass by Will, through the intestacy rules, under a deed of variation (provided within two years of death), or via a trust for the benefit of direct descendants.

The property must be in the estate. The RNRB applies to the property's value at death. If the deceased gave the property away before death and survived for seven years, the property is not in the estate — but neither is the RNRB available (though the downsizing addition may assist in some circumstances).

The Taper for Larger Estates

The RNRB is reduced — tapered away — for estates above a threshold. The threshold is £2 million in 2026–27. For every £2 of estate value above £2 million, the RNRB is reduced by £1. This means:

• An estate worth £2 million: full RNRB available
• An estate worth £2.35 million: RNRB reduced to £0 (£350,000 above threshold × £1 reduction per £2 = £175,000 reduction, eliminating the RNRB entirely)
• For a couple: combined RNRB of £350,000 is eliminated once the estate exceeds £2.7 million

The estate value for taper purposes is the total estate before any exemptions or reliefs — including the value of business property that qualifies for Business Property Relief. This catches some families unawares: an individual with a business worth £1.5 million, a home worth £400,000, and other assets of £200,000 has an estate of £2.1 million — above the taper threshold — even though the BPR-qualifying business means the actual IHT payable on the estate is modest.

Using the RNRB When There Is No Property at Death: The Downsizing Addition

A common concern is that individuals who sell or downsize their home — moving to a smaller property, rented accommodation, or a care home — will lose the RNRB because they have no qualifying property in the estate at death.

The downsizing addition addresses this. It allows the estate to claim a RNRB-equivalent allowance even where no qualifying property is held at death, provided:

1. The deceased owned a qualifying residence at some point on or after 8 July 2015 (the date the RNRB was announced)
2. They disposed of that property (downsized, sold, or gave it away)
3. At death, they leave other assets to lineal descendants at least equal to the available RNRB (the "brought forward allowance")

The calculation of the downsizing addition is complex and requires careful work, but the principle is that the RNRB should not be lost simply because someone sold their home late in life for perfectly sensible non-tax reasons.

For individuals who have sold their main residence and hold the proceeds in investments or other assets, the downsizing addition can effectively substitute the investment portfolio value for the home — provided the other conditions are met.

International Complications

RNRB applies only to UK residential property. An internationally mobile individual who has lived in multiple countries and whose primary home is overseas will not qualify for the RNRB on that overseas home. If they also own UK property that has been their main UK residence, that property may qualify — but the restriction to UK residential property is an important limitation.

Non-UK domiciled individuals. For a non-UK domiciled individual, UK IHT applies only to UK-situated assets. If their only UK assets are a flat in London (for occasional UK visits) and some UK investments, the RNRB is only relevant to the extent the London flat is a main UK residence and passes to direct descendants.

Trusts and the RNRB. If a residential property is held in a trust that is a Qualifying Interest in Possession (QIIP), the RNRB may be available — the beneficiary with the qualifying interest is treated as owning the property for RNRB purposes. However, if the property is held in a discretionary trust, the RNRB is generally not available: the discretionary trust does not pass the property "closely inherited" in the required way.

Property held in a company. If the family home is held in a company structure — for example, a UK property held through an offshore company — it does not qualify as a "qualifying residential property" for RNRB purposes. The RNRB applies to properties held directly, not to shares in a company that holds property.

Practical Estate Planning Steps

To ensure you are maximising the RNRB:

1. Ensure your will clearly leaves the qualifying residential property to lineal descendants. A will that leaves everything on trust — without specifying that direct descendants benefit from the residential property element — may not qualify. Get your will reviewed by a specialist.

2. Consider the taper threshold. If your estate is above or near £2 million, aggressive IHT planning (gifting, trust planning) that also reduces the estate value below the taper threshold unlocks the RNRB in addition to reducing IHT directly.

3. If you have downsized or sold your main residence, take advice on the downsizing addition. The claim must be made in the estate's IHT return — it is not automatic.

4. Ensure the property passes in the right way. The RNRB is not available if the property passes to a discretionary trust for the benefit of descendants — the residence must pass "closely inherited" in the manner required by the legislation.

5. Review after major life changes — divorce, death of a spouse, inheritance, sale of property. These events affect the RNRB calculation and may require an updated estate plan.

How Global Investments Can Help

Global Investments works with UK-resident and internationally mobile clients on estate planning that maximises the use of nil-rate bands, RNRB, and available reliefs within a comprehensive IHT plan. We can introduce you to specialist private client solicitors and tax advisers who will review your will, assess your RNRB position, and recommend any adjustments needed to ensure the allowance is not wasted. Contact us to discuss your estate planning objectives.