Nil Rate Band and Residence Nil Rate Band Explained

Reviewed by Ed WilkinsonLast updated: March 6, 2026 12:21 pm

Image credit: Alena Darmel @Pexels

The UK’s inheritance tax (IHT) system includes two key allowances that can reduce the tax due on an estate: the Nil Rate Band¹ (NRB) and the Residence Nil Rate Band² (RNRB). Understanding how these work can help you plan an estate effectively and may reduce the eventual IHT payable.

What is the Nil Rate Band?

The Nil Rate Band (NRB) is the threshold below which no IHT is charged. For the 2026/27 tax year, the NRB is £325,000 and is currently frozen at this level until April 2028. Estates valued at or below this amount will not pay IHT on death.

Amounts above the NRB are generally taxed at 40% on death. A reduced 36% rate can apply if at least 10% of the net estate is left to charity. Various reliefs may also reduce the tax, including Business Relief (formerly Business Property Relief) and Agricultural Relief, as well as the separate Residence Nil Rate Band.

Strategic Use of the Nil Rate Band

Using the NRB efficiently can lead to meaningful savings. One important feature is transferability between spouses or civil partners. If the first to die does not use all of their NRB, the unused percentage can be transferred to the survivor and carried over to the second death. This can allow up to two full NRBs to be available on the second death (currently up to £650,000 in total), subject to a claim by the personal representatives.

Case Example of NRB Transfer

Consider a scenario where the first partner in a marriage dies, having used £125,000 of their £325,000 NRB. The unused proportion is 61.54%. On the survivor’s death, their NRB can be increased by this same percentage. With today’s NRB of £325,000, that would give a total NRB of approximately £525,000. This demonstrates why accurate records and a formal claim (typically using HMRC form IHT402) matter.

The transferability rules make good record-keeping essential. Couples should retain copies of the first death’s will, grant of probate and IHT calculations so the unused NRB can be evidenced and claimed by the executors of the survivor’s estate.

While the NRB provides a core allowance, its value is maximised through careful planning and awareness of the transfer rules. Professional estate-planning advice can help you apply the rules correctly and make informed decisions tailored to your circumstances.

What is the Residence Nil Rate Band?

The Residence Nil Rate Band (RNRB) is an additional allowance that can apply when a qualifying residence is left to direct descendants. For 2026/27, it is £175,000 per person (also frozen until April 2028). Combined with the standard NRB, an individual may be able to pass up to £500,000 free of IHT, or up to £1 million for a married couple or civil partners if both NRB and RNRB are fully available and the home passes to direct descendants. Any unused RNRB can usually be transferred to a surviving spouse or civil partner by percentage, similar to the NRB.

Eligibility Criteria for the RNRB

To benefit from the RNRB, several key conditions must be fulfilled:

• The property in question must have been the deceased’s main residence at some point during their lifetime.
• The recipients of the property must be direct descendants, including children, grandchildren, or step-children; adopted and foster children also count. Certain trusts that give a direct descendant an immediate right to the property can qualify, but discretionary trusts typically do not.
• The total value of the estate should not exceed £2 million to avoid tapering of the RNRB. The available RNRB is reduced by £1 for every £2 that the estate exceeds £2 million in value (so it is tapered to £0 at £2.35 million per person). For this test, HMRC uses the value of the estate before most reliefs and exemptions.

Additional Considerations for Maximising the RNRB

Proper estate planning can enhance the effectiveness of the RNRB:

1. Documenting the property’s history: Keeping clear records of the property’s status as the main residence and any periods of absence can help substantiate claims to the RNRB.
2. Revising wills: Ensuring that the will clearly directs the family home to direct descendants (or gives them an immediate post-death interest) is crucial for applying the RNRB. Ambiguity in wills can lead to disputes or misinterpretation that might jeopardise eligibility. Trust structures should be reviewed carefully, as some may prevent the RNRB from applying.
3. Considering downsizing: If the property was sold to downsize or if the individual ceased to own a home, a downsizing addition might still allow the RNRB to be claimed, provided sufficient assets are left to direct descendants and the other conditions are met.

Understanding these conditions and planning accordingly can help to mitigate IHT liabilities, ensuring that more of a person’s legacy passes directly to their descendants. Given the complexity of the rules, seeking professional advice may be appropriate.

Planning with NRB and RNRB

Effective estate planning can ensure that both the NRB and RNRB are utilised to their fullest. Below are refined strategies along with additional insights:

1. Writing a will: Clearly define how assets, especially the family home, should be distributed to ensure that it passes to direct descendants where appropriate to benefit from the RNRB. It’s advisable to review and update your will periodically, especially after major life events such as marriage, entering a civil partnership, divorce, or the birth of a child, to reflect your current wishes and circumstances.
2. Consider the timing of gifts: Gifts to individuals are generally outside the estate if you survive seven years (the seven-year rule). Taper relief may reduce the tax on such gifts if death occurs between three and seven years after making them, but it does not restore any NRB already used by those gifts. Keep detailed records of any gifts, exemptions and dates.
3. Using trusts wisely: Trusts can help control how assets are used after death, but can affect eligibility for the RNRB. For example, certain discretionary trusts may not qualify for RNRB, whereas an absolute gift or an interest in possession to a direct descendant may qualify. Specialist advice is essential.
4. Assess the impact of lifetime transfers: Transfers made during your lifetime can reduce the NRB available on death if they fall within the seven-year window, which may increase the overall tax liability of the estate. Planning with a professional can help manage these effects.
5. Explore insurance options: Life insurance written in trust can provide funds to beneficiaries outside of the estate and is usually not subject to IHT. While this does not reduce the IHT due, it can help meet the liability and preserve other assets. Ensure the policy and trust are set up correctly.

Additional Considerations

To further optimise the use of NRB and RNRB, consider these additional points:

• Regularly appraise the value of your estate to check alignment with the current NRB and RNRB thresholds. Asset values can fluctuate over time.
• Engage in discussions with family members about your estate planning goals. Explaining the decisions behind the distribution of assets can help prevent disputes and ensure clarity.
• Stay informed about any changes in inheritance tax legislation, as updates may affect your estate planning strategies. Current freezes to NRB and RNRB are scheduled to run until April 2028.

By integrating these strategies into your estate planning, you can manage your assets in a tax-aware way and help ensure that your legacy is passed on according to your wishes. Always seek guidance from a suitably qualified professional to tailor these strategies to your specific circumstances.

Common Misconceptions and Challenges

Transfers between spouses or civil partners are generally exempt from IHT (unlimited if both are UK-domiciled), but this usually defers any tax until the second death. The combined standard NRB for a couple can be up to £650,000, with a potential additional RNRB of up to £350,000 if the conditions are met, giving a possible total of £1 million. Eligibility for the RNRB depends on the home passing to direct descendants and may be reduced or lost for larger estates.

Additionally, the RNRB taper threshold introduces complexity in estate planning for larger estates. The RNRB begins to taper when an individual’s estate exceeds £2 million, reducing by £1 for every £2 over this threshold until it reaches £0 at £2.35 million. For this test, HMRC assesses the value of the estate before most reliefs and exemptions, which can catch estates close to the threshold.

Clarifying Misconceptions

• Asset Transfers: While the spousal exemption is generous, it does not eliminate IHT permanently; liability is assessed on the survivor’s estate at the second death, taking account of any transferable allowances. Note that different limits can apply where the recipient spouse or civil partner is non-UK domiciled.
• RNRB Taper: If an estate is near or above £2 million, planning should consider the taper rules. Be mindful that simply relying on exemptions (for example, leaving assets to a spouse) does not reduce the estate value used for the taper test at that death. Any lifetime planning should also consider the gift-with-reservation and pre-owned assets rules.

Additional Considerations for Estate Planning

To effectively manage an estate in light of these intricacies, consider the following strategies:

1. Estate Valuation: Regularly assess the value of your estate to anticipate potential IHT liabilities, especially if your estate is near the £2 million mark, where RNRB tapering becomes relevant.
2. Documentation and Records: Maintain detailed records of all asset transfers and valuations. Accurate documentation can provide clarity during the estate administration process, helping executors understand the available tax reliefs.
3. Professional Advice: Given the complexities of IHT and the potential for costly mistakes, consulting a regulated financial adviser or a solicitor specialising in estate planning can be helpful. They can provide guidance tailored to your specific circumstances and ensure compliance with current tax rules.

By addressing these misconceptions and planning carefully, it is possible to manage IHT exposure while ensuring your wishes are implemented and remain compliant with UK tax regulations.

A Financial Adviser Can Help

IHT rules, including how the NRB and RNRB interact, can be complex. If you need personalised support, consider seeking advice from a suitably qualified, FCA-authorised financial adviser or a private client solicitor. They can explain your options and help you make informed decisions.

Advisers can also work alongside legal professionals on related areas such as will writing, trusts and charitable legacies, all of which can affect the IHT calculation and how smoothly your estate is administered.

FinancialAdvisers.co.uk can assist you with the matters discussed by connecting you with an FCA-authorised financial adviser in your area. This is not personal advice; whether the advice is right for you will depend on your circumstances.

This article contains external links for further information on topics. Whilst all attempts are made to verify the trustworthiness of these external sources, we accept no responsibilty for the upkeep or security of these external websites. Some of these links in particular are annotated below:

• ¹ https://www.gov.uk/government/publications/inheritance-tax-nil-rate-band-and-residence-nil-rate-bands-from-6-april-2028/inheritance-tax-nil-rate-band-residence-nil-rate-band-from-6-april-2028
• ² https://www.stoneking.co.uk/sectors/individuals/probate/residence-nil-rate-band