Before probate begins, you must estimate the estate's value to see if Inheritance Tax applies. This includes valuing the deceased person's money, property and belongings in order to determine if Inheritance Tax (IHT) is due. This process is important even if you are not sure that any tax will be due.

There is usually no IHT to pay if the estate is valued under £325,000 or if anything above this threshold is left to a spouse, civil partner, charity or amateur sports club. If the person was widowed or passed on their home to children or grandchildren, the threshold may be higher.

To estimate the estate's value, you'll need to account for:

• All assets owned at death (homes, bank accounts, valuables, vehicles, investments etc).
• Any gifts made in the 7 years before death.
• The value of any trusts where the person had a beneficial interest.

You can estimate values yourself or use HMRC’s Inheritance Tax Checker to guide you. The checker helps identify whether IHT is likely to be due, but it does not calculate how much tax is due or notify HMRC.

When valuing assets, include joint property, pensions, or overseas items and assess their market value on the date of death. For gifts, consider their value when given, especially if the deceased still benefited from them (e.g., living rent-free in a gifted home).

You will also need to consider debts and check whether full reporting of the estate to HMRC is required.

Married couples can pass on up to £1 million tax-free if they plan their estates carefully.

The Inheritance Tax  (IHT) nil-rate band is currently £325,000. This means there is normally no IHT to pay if an estate is valued below this threshold. This amount can be higher if you leave everything above the £325,000 threshold to your spouse, civil partner, a charity or a community amateur sports club.

In addition, there is an IHT residence nil rate band (RNRB) of £175,000. This is a transferable allowance for married couples and civil partners (per person) when their main residence is passed down to a direct descendent such as children or grandchildren after their death. The allowance is available to the deceased person’s children or grandchildren.

Any unused portion of the RNRB can be transferred to a surviving spouse or partner. The RNRB is in addition to the £325,000 nil-rate band. The allowance is available to the deceased person's children or grandchildren. Taken together with the current IHT limit of £325,000 this means that married couples and civil partners can pass on property worth up to £1 million (£325,000 x 2 plus £175,000 x 2) free of IHT to their direct descendants. 

The transfer does not happen automatically and must be claimed from HMRC when the second spouse or civil partner dies. This is usually done by the executor making a claim to transfer the unused RNRB from the estate of the spouse or civil partner that died first.

There is a tapering of the RNRB for estates worth more than £2 million even where the family home is left to direct descendants. The additional threshold will be reduced by £1 for every £2 that the estate is worth more than the £2 million taper threshold. This can result in the full amount of the RNRB being tapered away. 

Despite intense lobbying by the farming community, the proposed reduction in IHT Business and Agricultural Property reliefs are included in the draft Finance Bill 2025-26.

On 21 July 2025, the government published draft legislation for Finance Bill 2025-26. The consultation period for the draft legislation is open until 15 September 2025. This comes at a time when the government has seen borrowing in June surge to the second highest level on record and placing further pressure on public finances and increasing the urgency for tax reforms.

The legislation includes confirmation of a significant overhaul of Inheritance Tax (IHT) reliefs that were first announced in the Autumn Budget 2024. These measures faced criticism over their potential impact on small farms and rural communities. However, with the publication of the Finance Bill, these measures now look set to come into effect from 6 April 2026.

The changes will see the introduction of a new £1 million allowance that will apply to the combined value of property in an estate qualifying for 100% business property relief or 100% agricultural property relief. This means that the existing 100% rate of IHT relief will only apply to the combined value of property in an estate qualifying for 100% business property relief or 100% agricultural property relief. The rate of IHT relief will be reduced to 50% for the value of any qualifying assets over £1 million. This means that any assets receiving 50% relief will be effectively taxed at 20% IHT (the full rate being 40%).

This change applies per individual, meaning married couples could potentially pass on up to £3 million tax-free between them (when combined with nil-rate bands).

The government has also confirmed they will reduce the rate of business property relief available from 100% to 50% in all circumstances for shares designated as “not listed” on the markets of recognised stock exchanges, such as AIM. The existing rate of relief will continue at 50% where it is currently this rate and will also not be affected by the new allowance.

It was also announced that the option to pay IHT by equal annual instalments over 10 years interest-free will be extended to all qualifying property which is eligible for agricultural property relief or business property relief.

It was confirmed with the publication of the draft Finance Bill 2025–26 that measures first announced in the Autumn Budget 2024 to bring most unused pension funds and death benefits into the scope of Inheritance Tax (IHT) will start from 6 April 2027. This will significantly extend the IHT net, capturing pensions that were previously excluded. Individuals with sizeable pensions will need to consider these changes with some care, and review their estate planning accordingly.

This measure will affect individuals inheriting estates within the scope of IHT, including beneficiaries of any unused pension funds or death benefits included in those estates. Personal representatives will be liable for reporting and paying any IHT due on unused pension funds and death benefits.

Death-in-service benefits payable from a registered pension scheme and dependants’ scheme pensions from a defined benefit arrangement, or from a collective money purchase arrangement are excluded from these changes and will not be within the scope of IHT.

There were some changes to the original proposals following a technical consultation that closed in January 2025. As a result, personal representatives, rather than pension scheme administrators, will now be primarily liable for reporting and paying IHT on any unused pension funds and death benefits.

This means that pension scheme administrators and personal representatives will need to work together in administering IHT on pensions. There are concerns that this process could lead to multiple issues, including payment delays, greater complexity and GDPR privacy matters.

Double tax on estates can still hit families hard, even with treaties in place. When someone dies with ties to more than one country, their estate may face inheritance tax in both jurisdictions. Fortunately, the UK has Double Taxation Conventions with several countries to help reduce or eliminate this burden. Understanding how these treaties work, and what happens when no agreement exists, can make a big difference when dealing with international assets and long-term UK residents treated as UK domiciled.

Under these agreements, the country where the deceased was domiciled (or treated as domiciled) has primary taxing rights over all assets. The other country may only tax specific assets located in its own territory, such as land or buildings. Since 6 April 2025, long-term UK residents are treated as deemed UK domiciled for Inheritance Tax (IHT) purposes.

If double taxation still occurs, the DTC determines which country gives credit for the tax paid to the other. Relief is generally given in the UK through a credit for the overseas tax paid against the IHT due in the UK on the same assets already taxed.

The UK has current double taxation agreements that apply to IHT with countries including the USA, Ireland, South Africa, Sweden, Switzerland and the Netherlands. Older treaties exist with France, Italy, India and Pakistan but follow different rules and don’t have a provision for deemed domicile.

If no DTC exists, Unilateral Relief may be available. HMRC may still give credit for foreign tax on overseas assets, using a set formula to calculate proportional relief.