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Receiving a letter from HMRC questioning the value you placed on a property in the estate can feel alarming. It is a routine part of the process: HMRC's own IHT400 notes say it “will usually ask the Valuation Office Agency to give us their opinion of the value of the deceased's property”, and that if the VOA cannot accept your figures “they will try to agree a value with you”. This guide explains what the query means, what evidence to gather, how the discussion with the VOA works, and what happens to the tax if the agreed figure is higher. For a full overview of the probate process, see our complete UK probate guide.
HMRC does not value land itself. Its manual says that “Where land is situated in the United Kingdom we rely on professional advice from the Valuation Office Agency (VOA), or the Valuation and Lands Agency (VLA) in Northern Ireland, in arriving at a valuation.” The VOA covers England, Wales and Scotland; within it, District Valuer Services is the arm that does this work. Its surveyors are professionally qualified and work from sold price evidence and local market knowledge.
HMRC does not publish the data sources it uses to decide when to ask a question, so no honest list can be given here. What it does say is that the VOA opinion is sought as a matter of course, not only where something looks wrong.
Circumstances that commonly lead to a discussion about value include:
For context on how property valuations feed into the overall IHT calculation, see our guide to valuing property for probate.
HMRC's valuation query letter typically does one of two things:
In either case, the letter will specify a response deadline. It will also state the IHT consequences if the revised value is accepted: where the estate is already above the available nil-rate band — £325,000, or £500,000 with the residence nil-rate band on top — every £10,000 increase in property value adds £4,000 in IHT at the 40% rate.
The query letter is not a final demand. HMRC's notes describe the VOA as trying to agree a value with you, and you are entitled to respond with evidence and to disagree with the figure proposed. For guidance on how to respond to any type of HMRC probate query, see our step-by-step guide to responding to HMRC probate queries.
Many executors assume that if HMRC proposes a higher value, they must accept it. This is not the case. The legal standard for probate property valuation is the open market value at the date of death — the price a willing buyer would pay a willing seller in the open market with full knowledge of the property's condition. You are entitled to demonstrate that your original figure met this standard.
You have the right to:
The most effective response to a valuation query is a well-evidenced comparables pack. The steps are:
Assemble your comparables into a short written submission. You do not need a solicitor to write this — a clear, structured letter with your evidence attached is sufficient. See our guide on how to respond to an HMRC probate query for a detailed letter-writing template.
District Valuer Services is part of the Valuation Office Agency, a government executive agency separate from HMRC. Its surveyors are professionally qualified and act as an independent expert within the government machinery. The VOA covers England, Wales and Scotland; for land in Northern Ireland, HMRC's manual says it relies on the Valuation and Lands Agency instead. When HMRC receives your response to a valuation query, it passes the file on for that professional opinion.
The negotiation process typically follows this sequence:
HMRC's notes describe the intended shape of this: the VOA “will take into account the circumstances of any jointly owned property and amount of discount to be allowed”, and “If the Valuation Office Agency can not accept the figures you've used, they will try to agree a value with you.” It is a discussion about evidence, ending either in an agreed figure or, if none can be reached, at the tribunal.
HMRC does not publish a tolerance range for property valuations, and neither does the VOA. Figures of the “anything within 10% is fine” sort circulate widely and none of them come from an official source. This guide will not invent one.
The reason to be wary of them is not pedantry. A tolerance reads as a margin you may work within, and the rule runs the other way: the figure on the form has to be the open market value at the date of death, arrived at honestly. HMRC's notes make the same point from the other direction — if, after getting a valuation and before applying for the grant, you learn something that casts doubt on it, “you must reconsider it”, and the example given is finding offers above your figure once the property is marketed.
What the notes do offer, where you have several valuations giving a range, is that it is “probably best to adopt a value that's somewhere in between the highest and lowest values that you've got”.
The question is not which answer costs least. It is which figure is the open market value at the date of death — that is the standard the law sets, and an executor signs a declaration to that effect. What varies is the strength of the evidence on each side:
Where the estate sits relative to the nil-rate band changes how much tax turns on the answer. It does not change what the right answer is.
There is no published rule of thumb for when a professional report is worth commissioning, because neither the fee nor the outcome is published anywhere official. The arithmetic you can do yourself: 40% of the disputed uplift, to the extent the estate is above the available nil-rate band, is the tax at stake; a quote from a valuer is the cost of contesting it.
If the agreed valuation is higher than what you originally declared, the IHT due increases. HMRC will issue a revised assessment. You will owe:
Penalties under Schedule 24 to the Finance Act 2007 turn on behaviour. Where reasonable care was taken there is no penalty, so an honest figure later revised in discussion with the VOA does not by itself attract one. The maximum is 30% of the tax lost for a careless inaccuracy, 70% for a deliberate one and 100% where it is deliberate and concealed, with the figure within each band depending on the quality of disclosure. See our guide on HMRC IHT compliance check letters for more on how HMRC treats errors. For an overview of interest charges, see our guide to IHT interest and probate delays.
No official source publishes timescales for inheritance tax valuation disputes, so any week-by-week timeline you see is an estimate. The fixed points are these: HMRC's letter sets its own response deadline, and it will generally extend it if you write and explain that you are obtaining a valuation; the discussion runs until the VOA and you agree a figure; and if you cannot agree, the dispute goes to the First-tier Tribunal (Tax Chamber).
The cost of the delay is not neutral. Interest on unpaid inheritance tax runs from the first day of the seventh month after the month of death, whatever the reason for the delay.
For a broader look at what can delay probate and what to do while you wait, see our guide to probate delayed by HMRC: how long and what to do.
No official source publishes surveyors' fees for probate valuations, and they vary with property size, location, whether the valuation has to be retrospective to a date of death some time ago, and whether the valuer needs to visit. Ask for a written quote before instructing.
Whoever you instruct, confirm in writing that the report is required for inheritance tax and probate purposes, so the valuer uses the right standard — open market value at the date of death — and takes account of the things HMRC's notes single out: the state of repair of the property, and any features that might make it attractive to a builder or developer. The fee is an estate administration expense that can be paid from the estate before distribution.
Not unilaterally. HMRC's notes say the VOA “will try to agree a value with you”. If you cannot agree, the case can go to the First-tier Tribunal (Tax Chamber) for an independent determination. That right exists whatever figure HMRC proposes.
No. A well-organised response with comparable evidence, submitted directly to HMRC, is acceptable. A solicitor or chartered tax adviser adds cost and can correspond with HMRC and the VOA on your behalf; whether that is worth it depends on the tax at stake and the quote you are given. Reasonable professional fees for administering the estate are generally payable from the estate.
HMRC can and does use post-death sale prices as evidence that the probate valuation was too low. However, the legal test is the value at the date of death, not the sale date. You can legitimately argue that market conditions changed, the property was improved, or the sale achieved an exceptional price. An RICS report based on the date-of-death value remains your strongest defence.
Yes — the probate value is also the base cost for capital gains tax purposes when the estate or a beneficiary later sells the property. A higher probate value means a higher base cost, which reduces any capital gain on sale. This CGT saving can sometimes partially offset the additional IHT cost of accepting a higher value. See our guide on capital gains tax on inherited property.
Section 240 of the Inheritance Tax Act 1984 sets the limits, running from the later of the date the tax was paid or the date it became due: four years normally, six years where the loss of tax was brought about carelessly, and twenty years where it was brought about deliberately. Those are the periods to keep valuation evidence and correspondence for.
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