Probate & Inheritance Tax UK: Thresholds & Rules
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When someone dies, the people left to sort out their affairs often face two intertwined jobs at the same time: applying for probate and working out whether Inheritance Tax is due. The two processes feed into each other, which is why they cause so much confusion.
Get the valuation wrong, miss an allowance, or file the wrong form, and the executor can end up personally out of pocket. This guide walks through how Inheritance Tax works in England and Wales, how it connects to the grant of representation, and where the common traps sit.
It is written for executors, administrators and family members who want to understand the landscape before they commit to any particular course of action on an estate they are responsible for.
Overview
Inheritance Tax, usually shortened to IHT, is a tax charged on the value of a person's estate when they die. The estate means everything they owned at the date of death: the house, savings, investments, personal possessions, any business interests, and in some cases gifts made in the seven years before death.
HMRC adds it all up, subtracts debts and funeral costs, and compares the net figure to the available tax-free allowances. Probate is a separate but related process. It is the legal authority to deal with the estate, granted by the Probate Registry once the paperwork is in order.
If there is a valid will, the named executors apply for a grant of probate. If there is no will, the closest relatives apply for letters of administration. Either way, banks, the Land Registry and share registrars will usually want to see the grant before they release funds or transfer assets. The Inheritance Tax position has to be settled, or at least declared, as part of that application.
Key steps
- Value the estate accurately. List every asset the deceased held at the date of death: property, bank accounts, pensions, investments, vehicles, personal effects and any business interests. Use open market values, not insurance valuations or sentimental figures. For property, a surveyor's valuation is often worth the cost because HMRC can challenge figures that look low. 2. Identify debts and allowable deductions. Subtract outstanding mortgages, credit card balances, utility arrears, funeral expenses and any other liabilities owed at death. These reduce the taxable estate. Keep documentary evidence for every figure you deduct because HMRC can ask to see the paperwork later and executors are expected to show their working. 3. Check which allowances apply. Work out whether the nil rate band, the residence nil rate band, spousal transfers of unused allowance, charity relief, business relief or agricultural relief are available. The rules on the residence nil rate band are particularly fiddly where the home passes to children or grandchildren, and the allowance tapers for larger estates. 4. Complete the correct IHT forms. Depending on whether the estate qualifies as an excepted estate or a full account is needed, you will use different HMRC forms. Submitting the wrong one delays probate. The forms ask for detailed asset schedules, so the valuation work done earlier feeds directly into this stage. 5. Pay any tax due and apply for the grant. IHT is generally payable within six months of the end of the month of death, and interest runs on late payment. In most cases some or all of the tax has to be paid before probate is issued, which creates a cash flow problem executors need to plan for using the direct payment scheme or a short-term loan.
Common questions
Q What is the current Inheritance Tax threshold?
The nil rate band has sat at the same headline figure for many years and any estate valued below it generally pays no Inheritance Tax. An additional residence nil rate band can apply where the family home passes to direct descendants. Both figures and the rules around them are reviewed at fiscal events, so always check the current position on gov.uk before you rely on a number.
Q Do I always need probate if Inheritance Tax is due?
In most cases yes. If the estate holds property in the deceased's sole name, or significant funds in bank or investment accounts, the institutions holding those assets will want to see a grant before releasing them. Smaller estates with only low-value accounts may sometimes be dealt with without a grant, but IHT reporting obligations can still apply separately.
Q What is an excepted estate?
An excepted estate is one that meets HMRC's criteria for simplified reporting, usually because it falls below the tax threshold, qualifies as an exempt transfer to a spouse or charity, or belongs to someone who was not UK domiciled and had limited UK assets. For excepted estates a full IHT account is generally not required, though the estate value still has to be declared as part of the probate application.
Q Who is personally liable if Inheritance Tax is underpaid?
Executors and administrators can be held personally responsible for any shortfall if they distribute the estate before the tax position is properly settled. HMRC can pursue them directly for unpaid tax, interest and penalties. This is why careful valuations, proper record keeping and sometimes a clearance certificate from HMRC before final distribution matter so much.
Q How does jointly owned property affect the estate?
Property held as joint tenants passes automatically to the surviving owner by survivorship, but the deceased's share is still counted for Inheritance Tax purposes at its market value. Property held as tenants in common passes under the will or intestacy rules. The distinction changes both the probate paperwork and sometimes the tax calculation, so the title entry at the Land Registry is worth checking early.
Q Can gifts made before death reduce the tax bill?
Gifts made more than seven years before death are usually outside the estate. Gifts within seven years may be brought back into the calculation, though taper relief can reduce the tax on gifts made between three and seven years before death. Certain small gifts, wedding gifts and regular gifts out of income can be exempt. The rules are detailed and record keeping by the deceased matters.
Q When does the Inheritance Tax have to be paid?
IHT is generally due by the end of the sixth month after the month of death. Interest runs on any unpaid tax after that date. Tax on certain assets like land and buildings can be paid in instalments over ten years, but interest still accrues. In practice, some of the tax often has to be paid before probate is granted, which creates a timing issue executors need to plan around.
Sources
This guide is based on primary UK law and official guidance.
- Guidance · UK GovInheritance Tax guidance (gov.uk)gov.uk
- Guidance · UK GovApplying for probate (gov.uk)gov.uk
- Guidance · UK GovIHT400 Inheritance Tax account formgov.uk
- Guidance · UK GovReport an excepted estate for Inheritance Taxgov.uk
- Guidance · UK GovResidence nil rate bandgov.uk
Legal disclaimer
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.