Can an inheritance tax accountant assist executors?
The role an inheritance tax accountant plays for executors
Yes — in many estates, an inheritance tax accountant is exactly the right professional to bring in. HMRC recognises that a personal representative can ask someone else, such as a solicitor or accountant, to act on their behalf, and that personal representative is the person responsible for finalising the deceased person’s affairs. In practice, that means the executor still carries the legal role, but the accountant can handle the valuation work, the calculations, the HMRC forms, and much of the day-to-day correspondence that tends to slow estates down when handled casually.
Why executors run into difficulty so quickly
The pressure usually starts with timing. If Inheritance Tax is due, or if full details of the estate are needed, HMRC says the estate must be reported on form IHT400 within 12 months of the death and before probate is applied for. Payment is due earlier: Inheritance Tax accountant in the uk generally has to be paid by the end of the sixth month after death to avoid interest, and probate usually cannot be completed until at least a payment on account has been made. That is why executors often discover that the job is not just about “getting probate”; it is about gathering evidence, valuing assets properly, and proving the figures to HMRC before the estate can move forward.
The tasks that an executor can hand over
| Executor task | What an inheritance tax accountant usually does | Why it matters |
| Valuing property, shares, savings and personal possessions | Pulls together date-of-death values and supporting schedules | HMRC expects estate values to be based on the date of death, not a later sale price. |
| Completing the Inheritance Tax account | Prepares IHT400 and the supporting schedules where a full account is needed | HMRC requires IHT400 where Inheritance Tax is due or the estate is not an excepted estate. |
| Coordinating probate timing | Helps line up the tax payment and the probate application | HMRC says payment normally has to start before probate is granted. |
| Dealing with HMRC as agent | Acts for the executor as the authorised adviser | HMRC provides for someone else, such as an accountant, to act for the personal representative. |
The current inheritance tax thresholds and rates
For the 2026-27 and 2027-28 tax years, HMRC has fixed the main inheritance tax thresholds at current levels: the nil-rate band is £325,000 and the residence nil-rate band is £175,000. The residence nil-rate band tapers away once the net estate is above £2 million, reducing by £1 for every £2 above that level. The standard Inheritance Tax rate remains 40% on the taxable part of an estate above the available thresholds, although a reduced 36% rate can apply where at least 10% of the net estate is left to charity. In the right family structure, a qualifying estate can still pass on up to £500,000 tax-free, and the qualifying estate of a surviving spouse or civil partner can pass on up to £1 million without an Inheritance Tax liability.
How the figures work in a straightforward estate
A simple executor example shows why an inheritance tax accountant is useful. Suppose the estate is worth £620,000 in total, including a home left to direct descendants, and there are no lifetime gifts that reduce the available allowances. If the estate qualifies for the full nil-rate band and residence nil-rate band, £500,000 is sheltered (£325,000 + £175,000), leaving £120,000 taxable. At 40%, the Inheritance Tax bill would be £48,000. If the will also included a charitable gift large enough to bring the estate into the reduced-rate rules, the effective rate could fall to 36% on the relevant taxable estate. Those are not academic distinctions for an executor; they can change the cash position of the estate by tens of thousands of pounds.
Where the accountant earns their fee early
The real value often appears before any form is filed. HMRC expects executors to list assets and estimate each item at its date-of-death value, and full disclosure means not only the obvious items like bank accounts and property, but also debts, lifetime gifts, reliefs and exemptions. That matters because estates are frequently under pressure from incomplete records, out-of-date valuations, or assumptions about what “must” be taxable. A good inheritance tax accountant will tidy the evidence trail, identify the correct allowances, and make sure the figures used in IHT400 are defensible if HMRC later asks questions.
The estates that need professional support most
The estates that cause the most stress are usually not the simplest ones with a single bank account and a modest home. They are the ones with pensions, property portfolios, family companies, trusts, foreign elements, or an unclear will structure. HMRC’s own technical note on pensions confirms that personal representatives must pay any Inheritance Tax due on an estate, including on pensions, and submit a full account before probate. HMRC also says a discharge certificate can be sought only once the personal representatives believe all assets, liabilities and variations have been properly reported and any tax due has been paid. In other words, the executor cannot simply “pass it over” and forget it; they remain in the middle of the process, even when advisers are doing the technical work.
Capital gains tax during administration is easy to miss
Inheritance Tax is only one side of the job. Capital Gains Tax can also arise while the estate is being administered. HMRC says there is no Capital Gains Tax charge when someone dies; instead, the deceased’s assets are treated as passing to the personal representatives at their market value on the date of death. If the personal representatives later sell estate assets during the administration period, they may be liable to Capital Gains Tax on the gain. For 2026-27, the annual exempt amount for personal representatives is £3,000, and from 6 April 2026 the CGT rate for personal representatives of someone who has died is 24% on chargeable gains, subject to the usual rules for qualifying reliefs.
A practical CGT example for executors
Take a buy-to-let flat valued at £400,000 at death. Six months later, the estate sells it for £425,000 after estate costs. The gain before reliefs is £25,000. Against that, the estate may use the annual exempt amount of £3,000, leaving £22,000 taxable. At the 24% personal representative rate, the CGT bill would be £5,280. That is the sort of calculation that catches executors out, because the property has already been “taxed” for Inheritance Tax purposes, yet the estate can still create a separate income tax or CGT burden during administration. A tax adviser will normally check whether the sale falls inside the administration period, whether any losses are available, and whether any reliefs or trust issues change the answer.
Registering the estate for ongoing tax work
Once the estate starts generating income or gains, there may also be an estate registration and Self Assessment obligation. HMRC says an executor, administrator or other personal representative should register the estate if the estate is worth more than £2.5 million at the date of death, if assets sold by the personal representative in a tax year exceed £500,000, or if the total Income Tax and Capital Gains Tax due for the administration period is more than £10,000. From 6 April 2024, estates with income of up to £500 from all sources do not pay Income Tax on that income as it arises; above that amount, tax becomes payable on the full amount. HMRC also says the estate should be registered by 5 October after the tax year in which the income or gains first make registration necessary, and the estate will receive a UTR for Trust and Estate Tax Returns.
The mistakes that create avoidable inheritance tax bills
The most common errors are rarely dramatic; they are usually small omissions with expensive consequences. Executors often forget that the residence nil-rate band does not apply to lifetime gifts, transfers into trusts, or gifts made within the seven years before death, and that the basic nil-rate band and the residence nil-rate band are separate tests. Others miss the taper on estates above £2 million, assume every home automatically qualifies for the residence nil-rate band, or fail to check whether a charitable gift could reduce the Inheritance Tax rate to 36%. Those points sound technical, but they are exactly where HMRC scrutiny tends to focus because they affect the tax calculation directly.
Where an inheritance tax accountant is most valuable in real life
The best time to involve an inheritance tax accountant is often before the executor starts making assumptions. That is especially true where the estate includes more than one property, a family company, farmland, business assets, trust interests, overseas assets, or a will that needs careful wording around charitable gifts and inheritance tax reliefs. HMRC’s IHT400 notes also flag domicile uncertainty as a point where the detailed guidance must be checked closely, which is a good reminder that some estates need more than a basic probate-style tidy-up. In those cases, the accountant is not just filling in forms; they are protecting the executor from missed deadlines, incorrect valuations, and an avoidable personal liability exposure while keeping the administration moving towards probate and final distribution.