IHT Debts and Deductions UK: What Liabilities Reduce the Inheritance Tax Estate? (2026)
The IHT estate is gross assets minus allowable liabilities. Mortgages, personal loans, outstanding tax, and funeral expenses reduce the taxable estate. The Finance Act 2013 introduced s162A IHTA 1984 — blocking debt deductions where the debt funded a BPR or APR qualifying asset (no double relief). IHT itself is not a deductible liability.
| Liability | Deductible from IHT Estate? | Notes |
|---|---|---|
| Mortgage on main home | Yes | Deducted from property value only; cap at property value |
| Equity release / lifetime mortgage | Yes | Capital + rolled-up interest deductible |
| Unsecured personal loan / credit card | Yes | Balance outstanding at date of death |
| Outstanding income tax (prior years) | Yes | Assessed liabilities up to date of death |
| Outstanding CGT on pre-death disposals | Yes | Death not a CGT disposal (s62 TCGA); pre-death CGT is |
| Funeral expenses (reasonable) | Yes | s172 IHTA 1984; reasonableness test applies |
| Loan to buy BPR/APR asset | Restricted | s162A IHTA — cannot claim both BPR and debt deduction |
| IHT itself | No | IHT is the output of the calculation, not a deduction |
| Debts owed to the deceased | No (asset) | Amounts owed to estate are assets, not liabilities |
| Contingent liabilities (uncrystallised) | Provisionally | May be estimated; settled once outcome known |
Debts and IHT Deductions: The Complete Guide
What liabilities reduce the IHT estate?
The IHT estate is calculated as the total gross value of all assets (property, investments, cash, business interests, personal possessions) minus allowable liabilities outstanding at the date of death (s5 IHTA 1984). Allowable liabilities include: (1) Mortgages and secured loans — deductible only against the property they are secured on; the deduction cannot exceed the value of the secured property. (2) Unsecured personal loans, credit card balances, and overdrafts outstanding at death. (3) Outstanding income tax, capital gains tax, or VAT liabilities that were due before death (or assessed to the estate). (4) Trade debts and business liabilities (including outstanding suppliers, contractors, and lease obligations for a business). (5) Funeral expenses — the reasonable cost of a funeral, including a headstone. The executor must declare all liabilities on form IHT419 (liabilities) of the IHT400 estate return. HMRC can challenge liabilities that appear to have been created artificially to reduce the IHT estate.
Mortgage deductibility: the key rule
A mortgage is deductible from the value of the property it secures — reducing the net value of that property in the IHT estate. Example: a house worth £600,000 with a £200,000 outstanding mortgage: the net IHT value of the property is £400,000. The mortgage deduction is capped at the value of the secured property — a mortgage of £700,000 on a property worth £600,000 produces nil net value (not a negative value that reduces other estate assets). For equity release mortgages (lifetime mortgages) — where the borrower has taken a lump sum and deferred the interest — the full outstanding capital and rolled-up interest is deductible as a liability at date of death. Equity release is widely used as an IHT planning tool precisely because it reduces the property value in the estate. For interest-only mortgages: the capital outstanding is deductible; the interest accrued to date of death (if not yet paid) is also deductible. For endowment mortgages: the endowment policy is a separate estate asset (in trust or otherwise); the mortgage capital is a separate liability — both must be declared.
Finance Act 2013 anti-avoidance: debts not deductible (s162A–162B IHTA 1984)
The Finance Act 2013 introduced s162A and s162B IHTA 1984 to prevent artificial debt arrangements from reducing the IHT estate. The rules restrict the deductibility of a debt where: (1) The debt was incurred to acquire an asset that is relieved from IHT or is exempt from IHT — for example, borrowing money to buy BPR-qualifying AIM shares or APR-qualifying farmland, with the intention of deducting the debt from the estate while the asset itself qualifies for 100% BPR. Under s162A, such a debt is not deductible to the extent that the relieved/exempt asset offsets the debt. (2) The consideration provided for the debt has left the estate — if you borrowed £500,000 and the funds are no longer in the estate (spent or given away as a PET), the debt may still be deductible, but HMRC scrutinises these arrangements closely. The policy: HMRC will not allow a double benefit where a debt reduces the taxable estate and the asset the debt funded is also exempt or relieved. Example: borrowing £400,000 to buy AIM shares (BPR 100%); the AIM shares are exempt from IHT; the £400,000 loan is NOT deductible under s162A (it would produce a double IHT reduction — exempt asset + deductible debt).
Liabilities that are NOT deductible from the IHT estate
Not all debts reduce the IHT estate. Non-deductible liabilities include: (1) IHT itself — the IHT bill is not a deductible liability of the estate; it is the output of the IHT calculation, not an input. (2) Debts incurred to acquire exempt or relieved assets (s162A IHTA — see above). (3) Debts charged on exempt property — where a debt is secured on exempt property (e.g. a mortgage on agricultural property qualifying for APR), the debt can only be deducted from the exempt property's value — not from the general taxable estate; if the exempt property's value exceeds the debt, no further deduction is available against taxable assets. (4) Contingent liabilities — debts that are not yet certain at date of death (e.g. pending litigation where the deceased might be found liable — the claim may be provisionally notified but not yet deductible in full). (5) Debts owed to the estate — if the deceased had made a loan to the estate (e.g. a director's loan account in credit), this is an estate asset, not a liability; a debt owed by a third party to the deceased is an asset. (6) Debts supported by property outside the estate — where the security for a debt is entirely outside the estate (e.g. a charge over a third party's property), the debt may still be deductible, but evidence is required.
Funeral expenses and IHT
Reasonable funeral expenses are deductible from the IHT estate (s172 IHTA 1984). What HMRC considers reasonable includes: the cost of the funeral service and burial or cremation; a headstone or other memorial; the cost of the funeral reception (reasonable amount); flowers (reasonable amount); the cost of publishing death notices; travel expenses for the executor to attend the funeral. What is not deductible: pre-arranged funeral plan costs that were paid before death (they were a lifetime expense of the deceased, not a post-death liability); extravagant memorial events significantly exceeding a reasonable funeral cost; the cost of a wake that is more in the nature of a celebratory event than a funeral reception. HMRC applies a reasonableness test — there is no fixed cap, but very large funeral expenses will be scrutinised. Funeral costs are deducted before the IHT calculation; they are disclosed on the IHT400 estate return on the main form (not form IHT419, which is for other liabilities).
Outstanding tax liabilities at death
Tax liabilities outstanding at date of death are deductible from the IHT estate: (1) Income tax: unpaid income tax for tax years up to and including the year of death (including the final year — HMRC will issue a final income tax assessment for the period from 6 April to the date of death). (2) Capital gains tax: CGT arising from disposals made by the deceased in the tax year of death (before the date of death) — deductible as a liability. CGT does not arise on the death itself (s62 TCGA 1992 — death is not a disposal), but pre-death CGT liabilities are deductible. (3) VAT: outstanding VAT due from the deceased's business at date of death. (4) National Insurance contributions: outstanding NIC liabilities are deductible. The personal representatives are responsible for settling all outstanding tax liabilities of the deceased from the estate before distributing to beneficiaries. Failure to pay outstanding tax liabilities before distribution can result in personal liability for the executor.
Frequently Asked Questions
Does a mortgage reduce inheritance tax in the UK?
Yes. An outstanding mortgage is deductible from the value of the secured property in the IHT estate. A house worth £600,000 with a £200,000 mortgage has a net IHT value of £400,000. The deduction cannot exceed the property value (creating a negative doesn't reduce other estate assets). For equity release/lifetime mortgages, the full outstanding capital plus rolled-up interest is deductible. The mortgage must be genuinely secured on the property — artificial debt arrangements to reduce IHT are restricted under s162A IHTA 1984 (Finance Act 2013).
What debts are deductible from the IHT estate?
Deductible liabilities include: mortgages (against the secured property); unsecured personal loans and credit cards; outstanding income tax, CGT, VAT and NIC at date of death; trade debts and business liabilities; equity release mortgage balances; reasonable funeral expenses (s172 IHTA 1984). Not deductible: IHT itself; debts incurred to buy BPR or APR qualifying assets (s162A IHTA 1984 anti-avoidance); debts charged on exempt property where the exempt value exceeds the debt; contingent liabilities not yet crystallised.
Are funeral expenses deductible from IHT?
Yes. Reasonable funeral expenses reduce the IHT estate under s172 IHTA 1984. This includes the funeral service, burial or cremation, a headstone, reasonable flowers, and a modest reception. HMRC applies a reasonableness test — there is no hard cap, but extravagant events are scrutinised. Pre-arranged funeral plans paid before death are not deductible (they were a lifetime expense). Funeral expenses are declared on the IHT400 main form.
What is the Finance Act 2013 restriction on IHT debt deductions?
Section 162A IHTA 1984 (introduced by Finance Act 2013) prevents a double IHT benefit where a debt was incurred to purchase an asset that qualifies for IHT exemption or relief (e.g. BPR on AIM shares, APR on farmland). The debt is not deductible to the extent that the relieved/exempt asset offsets the debt value. Example: borrow £400,000 to buy AIM shares (100% BPR); the AIM shares are IHT-exempt but the £400,000 loan cannot also reduce the taxable estate — s162A blocks the debt deduction. Section 162B restricts deductions where the debt consideration has left the estate.
Is outstanding income tax deductible from the IHT estate?
Yes. Income tax assessed to the deceased (up to and including the tax year of death) and any outstanding CGT or VAT liabilities are deductible from the IHT estate as liabilities at date of death. The personal representatives request a final income tax assessment from HMRC (SA tax return for the year of death) — the resulting tax liability is deductible. Pre-death CGT on disposals made before death is deductible; CGT does not arise on death itself (s62 TCGA 1992).
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