The Residence Nil Rate Band (RNRB): what it means for inheritance tax planning

Overview

The residence nil rate band (RNRB) is an important component of UK inheritance tax (IHT) planning, designed to help pass the family home to future generations in a more tax-efficient way.

Introduced on 6 April 2017, the allowance was gradually phased in and reached £175,000 in 2020/21, where it has since remained frozen alongside the standard nil rate band of £325,000 until 5 April 2031.

For married couples and civil partners, both allowances can be transferred, meaning that up to £1 million of an estate may pass to direct descendants free from IHT.

While the opportunity is significant, the rules are highly conditional. Without careful planning, estates may lose some or all of the available relief.

At Finura, we support clients in navigating these complexities to ensure their estate planning is effective, efficient, and aligned with their long-term goals.

How the Residence Nil Rate Band works

Current thresholds

The RNRB has been available at its full level since 2020:

• £175,000 per individual
• Frozen until April 2031

This freeze means more estates are gradually being brought into scope for inheritance tax, increasing the importance of proactive planning.

When the RNRB applies

The RNRB is only available where:

• The estate includes a qualifying residential interest (QRI)
• The property is passed to direct descendants

This differs from the standard nil rate band, which is available regardless of how assets are distributed.

What qualifies as a ‘Qualifying Residential Interest’?

A qualifying residential interest is broadly a property:

• Owned by the individual, and
• Occupied by them at some stage as a residence

This may include:

• A main home
• A previously occupied residence now let out
• A holiday home (UK or overseas), if used as a residence

Pure buy-to-let properties that were never occupied will not qualify.

Where more than one property exists, personal representatives must nominate the qualifying property, making accurate estate planning essential.

Passing property to direct descendants

To benefit from the RNRB, the property must be “closely inherited”, meaning it is passed to direct descendants, including:

• Children, grandchildren and lineal descendants
• Step, adopted and foster children
• Their spouses or civil partners
• Widowed partners (if not remarried)

Notably, unmarried partners do not qualify, which can significantly impact planning outcomes.

How the relief is calculated

The RNRB is limited to:

• The value of the qualifying residential interest, or
• The part that is closely inherited (if lower)

This makes how assets are split between beneficiaries highly significant.

Example: Partial RNRB

Ted dies in June 2026 with:

• Estate: £600,000
• Property: £250,000

He leaves:

• Half to his partner
• Half to his children

Only the portion passed to children qualifies, resulting in £125,000 RNRB, rather than the full £175,000.

Transferring the RNRB between spouses

Unused RNRB can be transferred between spouses or civil partners.

 Key points

 Transfer is calculated as a percentage

• Applies even if no property existed on first death
• Pre-2017 deaths are treated as having full unused entitlement

Example: Full Transfer

Susan’s spouse died before April 2017. On her death in June 2026:

• She benefits from a 100% uplift
• Total RNRB = £350,000

Tapering: When the allowance is reduced

The RNRB reduces when estates exceed £2 million:

• Reduced by £1 for every £2 above the threshold

Important considerations:

 Threshold frozen until 2031

• Reliefs (e.g. business property relief) are ignored in the calculation
• Charitable gifts do not reduce the estate for taper purposes

Example: Taper Impact

Gillian dies in June 2026 with an estate of £2.5 million.

Although she would normally be entitled to:

• £650,000 standard nil rate band (including spousal transfer)
• £350,000 RNRB

Her estate exceeds the £2 million threshold by £500,000.

This reduces her RNRB by £250,000, leaving just £100,000 available.

Protecting the RNRB

For larger estates, planning is key.

Common strategies include:

• Lifetime gifting
• Using surplus income allowances
• Structuring spousal estates efficiently
• Planning how assets pass on first death

Each strategy must be considered carefully, particularly alongside capital gains tax implications.

Trusts and the RNRB

The use of trusts can significantly affect eligibility.

RNRB may apply where property is:

• Left outright to descendants
• Held in qualifying trusts (e.g. IPDI)
• Settled in bereaved minor or 18–25 trusts

However:

• Discretionary trusts do not qualify
• Existing wills using discretionary structures should be reviewed

Careful drafting is essential to preserve eligibility.

Downsizing and Disposal

Individuals who:

• Downsize, or
• Sell their home

may still benefit from a downsizing addition Additional Nil Rate Band (ANRB).

This allows estates to reclaim lost RNRB where:

• Assets are passed to direct descendants
• Eligibility conditions are met

Key risks

• No replacement assets → relief may be lost
• Insufficient assets passed to descendants → limited benefit

Example: Downsizing

Jeremy, a divorcee, originally owned a larger home worth £500,000. In May 2019, he chose to downsize—perhaps to reduce maintenance costs or release capital—moving into a smaller flat valued at £105,000. At the time, the residence nil rate band (RNRB) stood at £150,000.

When Jeremy dies in June 2026, the RNRB has increased to £175,000. At death, his estate consists of:

• His flat, worth £105,000, which he leaves to his son
• Cash and investments worth £50,000, which he leaves to his two daughters

How the RNRB applies

Because Jeremy still owns a qualifying property at death, his estate is eligible for the RNRB—but only up to the value of the property being passed to direct descendants.

• This means his estate receives an RNRB of £105,000, based on the value of the flat

However, by downsizing, Jeremy has effectively lost part of the RNRB that would have been available had he retained his original home.

Recovering the lost allowance: ANRB

The downsizing provisions allow Jeremy’s estate to reclaim some of this lost relief through the Additional Nil Rate Band (ANRB).

In simple terms:

• His original home (£500,000) was significantly larger than the RNRB at the time
• His new home (£105,000) only uses part of the available allowance
• The difference represents a potential “lost” RNRB, which can be recovered and applied to other assets

Based on the formal calculation, the additional amount available is £70,000.

Final position

Although Jeremy’s estate could theoretically benefit from:

• £105,000 RNRB (based on the flat), plus
• £70,000 ANRB (lost allowance)

the ANRB is restricted to the value of other assets being passed to direct descendants.

Because Jeremy only has £50,000 of additional assets, the ANRB is capped at that level.

Final allowances:

• RNRB: £105,000
• ANRB: £50,000
• Total RNRB available: £155,000

His estate will also benefit from the standard nil rate band of £325,000.

Key takeaway

This example highlights an important planning point:

Downsizing does not automatically mean losing the residence nil rate band — but the benefit may be limited by the value and destination of remaining assets.

To fully preserve the allowance, it’s important to ensure that:

• Sufficient assets remain in the estate, and
• Those assets are passed to direct descendants

Planning Pitfalls to Avoid

Common issues include:

• Leaving property to non-qualifying beneficiaries
• Using inappropriate trust structures
• Exceeding taper thresholds unknowingly
• Making late-stage decisions without capacity

These risks highlight the importance of early and coordinated planning.

Conclusion

The residence nil rate band offers valuable opportunities to reduce inheritance tax—particularly where property is passed to children or grandchildren.

However, the rules are complex and increasingly relevant as thresholds remain frozen and property values rise.

Effective planning requires careful consideration of:

• Estate structure
• Ownership arrangements
• Beneficiary choices
• Timing of transfers

At Finura, we help clients translate technical rules into clear, practical strategies – ensuring that more of their wealth is preserved for future generations.

Articles on this website are offered only for general information and educational purposes. They are not offered as, and do not constitute, financial advice. You should not act or rely on any information contained in this website without first seeking advice from a professional.

Examples within this article are for illustrative purposes only and do not constitute financial advice. Tax treatment depends on the individual circumstances of each client and may be subject to change in the future. For guidance, seek professional advice

Capital is at risk; investments and the income from them can fall as well as rise and investors may not get back the amounts originally invested.

The Financial Conduct Authority does not regulate estate planning, tax planning or Will writing.

Date written: 19^th May 2026

Approved by Evolution Wealth Network Ltd on 28/05/2026.