A probate valuation is a formal assessment of the open market value of all property and assets owned by someone at the date of death. It is required to administer the estate and to calculate any inheritance tax liability. Without accurate figures, probate cannot proceed correctly.
For executors, this can feel like one of the most pressured parts of estate administration. The figures declared to HMRC must be accurate, defensible and compliant with legislation. Mistakes can cause delays, interest charges or personal liability.
What Is a Probate Valuation?
A probate valuation establishes the open market value of assets at the date of death.
For property, this means the price the asset would reasonably have achieved on the open market at that specific date, assuming:
- A willing buyer and willing seller
- Proper marketing
- No special relationship influencing price
It is not:
- The insurance reinstatement cost
- An estate agent’s optimistic asking price
- A current estimate several months later
The requirement to use open market value at the date of death is set out in the Inheritance Tax Act 1984. HMRC expects valuations to reflect this legal definition precisely.
Professional probate valuations are commonly prepared by a Chartered Surveyor where residential or commercial property forms a significant part of the estate.
How Is Property Valued for Probate?
A probate property valuation is based on comparable evidence available at the date of death. The surveyor considers:
- Recent sales of similar properties
- Location and local demand
- Size, layout and condition
- Tenure and restrictions
- Market conditions at the time
To find out more about the wider influences on value, see our guide to what affects the market value of a residential property.
The valuation must reflect the condition of the property as it stood on the date of death. If the property was in poor repair, that must be reflected. Improvements carried out afterwards are irrelevant to the probate figure.
HMRC Probate Valuation Requirements
When submitting an estate valuation for probate in the UK, executors must declare the value of all assets.
Which Forms Are Required?
IHT205 is used for simpler estates that fall below the inheritance tax threshold
IHT400 is required for estates above the nil-rate band or where more complex circumstances apply
In Scotland, form C5 replaces IHT205 for excepted estates.
The nil-rate band is currently £325,000. Where a main residence passes to direct descendants, an additional residence nil-rate band of up to £175,000 may apply.
Married couples and civil partners can combine unused allowances. This can significantly increase the total tax-free threshold available to the surviving spouse’s estate.
Even where no inheritance tax is payable, accurate figures are still required.
When Does Inheritance Tax Apply?
Inheritance tax is generally charged at 40 percent on the value of an estate above the available thresholds.
For example:
- Nil-rate band: £325,000
- Residence nil-rate band: up to £175,000
- Combined potential allowance for an individual: £500,000
For a married couple with full transferable allowances, the total potential threshold can reach £1 million where qualifying conditions are met.
Understanding these thresholds helps determine whether IHT400 is required and whether tax will be payable. However, the starting point is always an accurate probate valuation.
The Probate Valuation Process
The probate valuation process usually follows these steps:
- Identify all assets including property, savings, investments and personal belongings
- Instruct appropriate professionals where required
- Obtain a RICS-compliant valuation for property
- Complete the relevant inheritance tax forms
- Submit the probate application
Inheritance tax must be paid within six months of the date of death to avoid interest charges. Executors typically have up to 12 months to obtain the grant of probate, although earlier submission is often advisable.
Delays in obtaining reliable valuations can slow the entire administration process.
What Does HMRC Look For?
HMRC applies risk-based checks to probate valuations.
Estates may be queried where:
- The declared property value appears low compared to local sales evidence
- Significant assets appear to be missing
- Overseas property is not clearly disclosed
- Digital or investment assets are overlooked
If HMRC believes a property has been undervalued, it can refer the matter to the District Valuer. The District Valuer may review evidence, request further information or inspect the property and provide a counter-valuation.
This is why accuracy and supporting evidence are critical from the outset.
Common Probate Valuation Mistakes
Using Insurance Value Instead of Market Value
Insurance reinstatement cost reflects the cost of rebuilding the property. It does not reflect what a buyer would pay. These figures are often significantly different.
Probate valuation must use open market value at the date of death.
Relying on Informal Estimates
An estate agent’s letter or verbal opinion may not meet HMRC expectations, particularly for higher-value estates. A formal valuation prepared by a RICS surveyor carries greater weight.
Undervaluing Out of Good Intentions
Executors sometimes assume that a lower value reduces tax. HMRC can and does challenge figures that appear inconsistent with market evidence.
If a valuation is found to be deliberately low, the executor may face penalties and personal liability. Executors have a legal duty of care when administering the estate.
Failing to Account for Jointly Held Property
Joint ownership structures affect how property is valued and declared. Only the deceased’s share should be included, but the basis of ownership must be clearly understood.
Missing Assets
Bank accounts, investments, overseas property and valuable personal items must all be declared. Incomplete disclosure can trigger HMRC enquiries.
What Happens If a Probate Valuation Is Wrong?
If HMRC questions a declared figure, it will request supporting evidence.
Where disagreement remains, the District Valuer may become involved. This can lead to:
- Revised valuations
- Additional inheritance tax
- Interest on unpaid tax
- Potential penalties
Honest mistakes can usually be corrected. However, deliberate under-valuation can result in more serious consequences.
It is important to remember that executors are personally responsible for ensuring the estate is administered correctly.
Do I Need a RICS Surveyor for Probate Valuation?
While not legally mandatory in every case, instructing a RICS-qualified surveyor is widely regarded as best practice where property forms a significant part of the estate.
A RICS probate valuation provides:
- An independent assessment
- A methodology aligned with professional standards
- Evidence suitable for HMRC scrutiny
- Professional indemnity insurance protection
This reduces the risk of challenge and gives executors confidence that their duty of care has been met.
How Much Does a Probate Valuation Cost?
Fees vary depending on:
- Property size and complexity
- Location
- Whether multiple properties are involved
Compared with potential inheritance tax liabilities and the risk of penalties, professional valuation fees are typically modest.
Why Instruct a Local Chartered Surveyor?
Property markets vary significantly by region.
Surrey and Sussex include:
- Period cottages
- Listed rural homes
- 1930s suburban houses
- Modern developments
- Converted agricultural buildings
Local knowledge supports accurate assessment of comparable evidence and realistic market positioning at the date of death.
Brian Gale Surveyors provides RICS-compliant probate and wider property valuations across Surrey and Sussex. Reports are prepared for use in probate applications and HMRC submissions.
If you require guidance on the probate valuation process or wish to discuss a specific property, please contact us.
Frequently Asked Questions
What is open market value for probate purposes?
It is the price the property would reasonably achieve on the open market at the date of death, assuming a willing buyer and seller and proper marketing.
How long do I have to complete a probate valuation?
Valuations must be obtained before submitting inheritance tax forms and the probate application. Inheritance tax is due within six months of death to avoid interest.
Can I challenge an HMRC probate valuation?
If HMRC issues a revised figure through the District Valuer, evidence can be reviewed and discussed. Professional valuation reports assist in resolving disagreements.
What is IHT400 and when is it required?
IHT400 is the detailed inheritance tax return required for estates above the nil-rate band or with complex arrangements. Simpler estates may use IHT205 or C5 in Scotland.
Administering an estate carries responsibility. An accurate probate valuation ensures compliance with legislation, supports correct tax calculation and protects executors from avoidable risk.
