Residence Nil-Rate Band: Maximising Your £175,000 Allowance

The residence nil-rate band (RNRB) was introduced from 6 April 2017 and reached its full amount of £175,000 per person on 6 April 2020, where it remains frozen until at least April 2031. For a married couple or civil partnership, the maximum combined RNRB is £350,000. Together with the standard nil-rate band (NRB) of £325,000 per person, a couple may shelter up to £1 million of their estate from inheritance tax (IHT) — provided all the conditions are met.

That phrase "provided all the conditions are met" carries significant weight. The RNRB is hedged with restrictions that catch many families unawares, particularly those with larger estates, trust structures, or property overseas. This guide explains the conditions in full.

The Core Conditions

The RNRB applies where:

1. A qualifying residential interest is included in the deceased's estate.
2. The property is closely inherited — it passes to a direct descendant.
3. The amount claimed does not exceed the value of the residential interest.
4. The estate does not exceed £2 million (subject to tapering, see below).

Each condition is examined in turn.

Condition 1: Qualifying Residential Interest

A qualifying residential interest is a residential property that:

• Has been the deceased's residence at some point — it need not be the main residence at the date of death, but it must have been lived in by the deceased as their home. A buy-to-let property that has never been the deceased's home does not qualify.
• Is situated in the UK. This is a crucial restriction for internationally mobile individuals. A Spanish villa or a Dubai apartment does not qualify for the RNRB, even if it was the deceased's main home at death. Only a UK property qualifies.
• Forms part of the deceased's estate — it is either owned outright, as a tenant in common (in which case only the deceased's share qualifies), or as a joint tenant (the deceased's half qualifies).

A property held in a discretionary trust does not satisfy this condition, because it does not form part of the deceased's free estate. An interest in possession trust (a life interest) is treated differently — a qualifying interest in possession is deemed to be part of the deceased's estate for IHT purposes and can qualify for the RNRB, but only if the property passes to direct descendants on the termination of the interest.

Condition 2: Closely Inherited — Direct Descendants Only

The property must pass to a "lineal descendant" of the deceased, which HMRC defines as:

• A child, grandchild, or further direct descendant
• A stepchild, adopted child, or fostered child (and their descendants)
• The spouse or civil partner of any of the above

Importantly, nephews, nieces, siblings, and unrelated beneficiaries do not qualify. Nor does a surviving spouse directly (though the property can qualify if it then passes from the surviving spouse to the descendants in due course, using the transferred RNRB on the second death).

A discretionary trust is not a "direct" gift to descendants, so assets placed into a discretionary trust do not qualify for the RNRB on the settlor's death. This is why the RNRB creates a tension with discretionary trust planning — the flexibility of a discretionary trust comes at the cost of the RNRB.

Condition 3: Capped at the Value of the Residential Interest

The RNRB cannot exceed the value of the qualifying property. If the property is worth £120,000, the maximum RNRB on that estate is £120,000, not £175,000. The unused portion cannot be applied to other assets.

This matters for estates where the property has been significantly reduced in value, is subject to a large mortgage, or where only a share of a jointly owned property is in the estate.

Condition 4: Tapering Above £2 Million

The RNRB is tapered away where the net estate exceeds £2 million. The taper reduces the RNRB by £1 for every £2 by which the estate exceeds £2 million. This means:

• At £2.175 million net estate, the full £175,000 RNRB remains available.
• At £2.350 million, the RNRB is entirely eliminated.
• For a couple, the tapering applies to each spouse's estate separately at the time of each death.

The £2 million threshold is assessed on the "net estate" before the RNRB or NRB reliefs. Gifts made in the seven years before death (potentially exempt transfers) are included in the calculation. This is important: lifetime gifts that would otherwise be covered by the NRB may bring the estate above the taper threshold.

Planning Around the Taper

For estates approaching £2 million, the following strategies may preserve the RNRB:

• Lifetime gifts to children: making PETs in the seven years before death reduces the estate below £2 million. However, gifts must survive seven years to be fully exempt, and the donor retains no benefit.
• Pension contributions: pension funds sit outside the estate for IHT purposes. Maximising pension savings reduces the estate value.
• Business or agricultural property: assets qualifying for BPR or APR are deducted from the estate for IHT purposes, potentially bringing the net estate below £2 million.
• Charitable bequests: reducing the estate by charitable gifts brings the taper threshold into play more favourably.

Transferable RNRB: Double Allowance for Couples

Like the standard NRB, any unused RNRB on the first death can be transferred to the surviving spouse. If the first spouse's estate includes no qualifying property — either because they had no UK home or because the property passed to non-descendants — their full RNRB is preserved for transfer.

On the survivor's death, the transferred RNRB is added to the survivor's own RNRB, giving up to £350,000 of additional shelter above the standard NRB. The claim is made on the survivor's estate; there is no need to claim it on the first death.

The transfer percentage is calculated at the first death — if the first spouse uses 50% of the RNRB, then 50% is transferable (applied at the rate prevailing on the second death).

The Downsizing Addition

A significant source of lost RNRB has been addressed by the downsizing addition. Where a deceased person:

• Disposed of a qualifying residential interest on or after 8 July 2015 (the date the policy was announced), and
• The estate at death contains a less valuable property or no qualifying residential interest,

a "downsizing addition" may be claimed to make up the shortfall, subject to the overall cap of £175,000 and the taper.

This allows people who have sold their home, moved into care, or downsized to a smaller property to preserve the RNRB. The claim is made on form IHT435 on the estate return.

The calculation is complex: executors must identify the "lost" RNRB attributable to the disposal and apply it against the chargeable estate. The assets that qualify for the downsizing addition must still pass to direct descendants.

Interaction with Trusts

The RNRB creates a genuine tension with trust-based estate planning:

• A property held in a discretionary trust at death does not qualify for the RNRB.
• An interest in possession in a property does qualify, provided the property passes to direct descendants on the life tenant's death.
• A property appointed out of a discretionary trust to a direct descendant during the settlor's lifetime may later qualify for the RNRB if it is in the descendant's estate.

Where a discretionary will trust is in place, trustees should consider whether the RNRB is being sacrificed and whether the trust structure can be modified (for example, by including an interest in possession for the surviving spouse, converting to an immediate post-death interest, or appointing the property to direct descendants within two years of death under s144 IHTA 1984, which is treated as if the will had always made the direct gift).

RNRB and Expats: Property Must Be in the UK Estate

As noted above, only UK property qualifies for the RNRB. An internationally mobile individual whose primary home is in Dubai, Singapore, or Spain will not benefit from the RNRB in respect of that property, regardless of their domicile status for IHT purposes.

Where a UK-domiciled individual owns property both in the UK and overseas, only the UK property can qualify. The overseas property may still be subject to UK IHT (given UK domicile), but it receives no RNRB.

For individuals considering whether to purchase or retain a UK residential property, the RNRB adds up to £70,000 of IHT value (at 40%) — a meaningful but rarely decisive factor in property decisions.

Practical Checklist for Advisers

• Has the deceased (or surviving spouse) ever owned a UK residential property? If so, is the downsizing addition available?
• Does the property pass to a direct descendant, or is it held in a discretionary trust?
• Is the net estate above £2 million? If so, how much RNRB survives tapering?
• Has the transferable RNRB from a deceased prior spouse been claimed?
• Is an interest in possession trust in place that might qualify?
• Has a deed of variation been considered to direct the property to qualifying beneficiaries?

How Global Investments Can Help

Global Investments provides estate planning advice to individuals and families across the full spectrum of wealth, with particular expertise in IHT planning for estates approaching or exceeding the £2 million taper threshold.

We model the RNRB interaction with the wider estate, identify whether the downsizing addition is available, and advise on how to structure wills and trusts to maximise relief. For UK-domiciled expats whose main home is overseas, we explain the implications and identify alternative planning strategies.

Our advisers work alongside specialist solicitors and tax counsel to ensure that RNRB planning is integrated into a coherent overall estate plan rather than addressed in isolation.

This guide is for general information only and does not constitute legal or tax advice. IHT rules are subject to change, and individual circumstances vary significantly. Seek professional advice before taking action. The value of investments and income from them can fall as well as rise.