IHT Liability Deduction Restrictions: Section 162A–162C IHTA 1984 and the Finance Act 2013 Changes
Since Finance Act 2013, liabilities used to fund excluded property or BPR/APR assets cannot be deducted from the taxable estate — they are matched against the exempt or relievable asset instead. Standard mortgages on UK property remain fully deductible. The targeted changes closed the home loan scheme and double-trust structures used to create artificial estate deductions.
The Liability Restriction Rules Explained
The general rule: what liabilities are deductible from the estate
Under s162 IHTA 1984, the value of the estate for IHT is reduced by outstanding liabilities at the date of death — debts owed by the deceased to third parties (mortgages, loans, credit cards, trade debts, income tax, etc.). The deduction is subject to the conditions in s162A–162C (anti-avoidance, post-FA 2013) and s175A (relating to liabilities not discharged after death). The general principle is that genuine liabilities reduce the estate — only contrived or scheme-based liabilities are restricted. A straightforward mortgage taken out to purchase the family home is fully deductible. A loan taken out from the bank to fund a portfolio of excluded property (overseas assets held outside the UK estate) is restricted.
Section 162A: liabilities attributable to excluded property
Section 162A IHTA 1984 (inserted by Finance Act 2013) provides that where a liability was incurred to acquire, maintain, or enhance excluded property, it cannot be deducted from the estate. 'Excluded property' for this purpose includes overseas assets held by a non-UK domiciled person or a person deemed non-UK domiciled. The classic home loan scheme targeted by s162A worked as follows: a UK-domiciled person held UK assets plus excluded property (overseas assets of a trust). They mortgaged their UK property (or took out a loan) and transferred the loan proceeds offshore into the excluded property trust — the UK liability was then deductible from the UK estate, reducing IHT, while the offshore assets remained outside the UK estate. Section 162A eliminates this deduction: a liability used to fund excluded property matches against the excluded property, not against the UK estate.
Section 162B: liabilities attributable to relievable property
Section 162B IHTA 1984 restricts deductions for liabilities attributable to property qualifying for relief (BPR or APR). Where a liability is used to acquire, maintain, or enhance BPR-qualifying or APR-qualifying property, the liability is not deductible from the estate — instead, it is treated as reducing the value of the relievable property itself. The net effect: if you borrow £500,000 to buy qualifying business property worth £1m, the BPR applies only to the net value of £500,000 (the business property after the liability). You cannot claim 100% BPR on the gross £1m value and then also deduct the £500,000 liability separately from the rest of the estate. This prevents double relief (BPR on the gross asset + liability deduction from the taxable estate).
Section 162C: liabilities not discharged after death
Section 162C IHTA 1984 provides that where a liability is not discharged (i.e. not actually paid off) by the estate after death, it is not deductible from the estate unless there is a real commercial reason for the non-discharge. The typical target is artificial schemes where an IOU or promissory note was created as a 'liability' but was never intended to be repaid (e.g. a circular debt arrangement where the liability in the estate matched an asset owed by the same person or a connected person). Under s162C, where it is not reasonably expected at the time of death that the liability will be discharged, the deduction is denied.
Liabilities that remain fully deductible
The s162A–162C restrictions target artificial arrangements — ordinary liabilities remain fully deductible: (1) a mortgage on the main residence used to purchase the house is fully deductible — the mortgage is attributable to the residential property, not to excluded or relievable property; (2) an unsecured personal loan used to pay living expenses or clear debts is fully deductible (not attributable to any specific asset); (3) income tax and capital gains tax liabilities as at the date of death are fully deductible; (4) business debts of a sole trade are fully deductible against the business assets (they reduce the net value of the business, and BPR applies to the net value); (5) credit cards and ordinary consumer debts are fully deductible.
Mortgages on let property and s162B interaction
A common question concerns buy-to-let properties with mortgages: (1) If the let property does NOT qualify for BPR (which it typically does not, as a pure investment property), the mortgage is attributable to the let property directly — not to BPR-qualifying property. The mortgage is deductible in full from the estate. (2) If the let property somehow qualifies for APR (e.g. agricultural let land attracting APR), the mortgage attributable to that property is restricted under s162B — it reduces the APR value rather than being a separate estate deduction. For most standard buy-to-let landlords: the mortgage on the investment property fully reduces the estate value, and the net equity of the property (after deducting the mortgage) is included in the taxable estate at 40% above the NRB.
Frequently Asked Questions
Can a mortgage on my UK home be deducted from my estate for IHT?
Yes — a mortgage taken out on the principal private residence (or any other UK property) and used to fund the purchase of that property remains fully deductible from the estate under s162 IHTA 1984. The s162A restriction only applies where the liability is attributable to excluded property (overseas assets of non-domiciled persons). A standard UK residential mortgage is not attributable to excluded property — it is attributable to the residential property. The full outstanding mortgage balance at death is deducted from the estate value when calculating IHT.
What is the home loan scheme and why was it closed?
The home loan scheme (also called the double-trust scheme or reversionary lease scheme in various versions) was a technique where a UK-domiciled person created a structure to make assets appear to be excluded property (outside the UK estate) while simultaneously maintaining a deductible liability in the UK estate. In its simplest form: the settlor transferred assets to an offshore trust (excluded property), then borrowed money from the offshore trust and used the liability to reduce the UK estate — so the overseas assets were outside the estate and the matching liability reduced the UK estate. Finance Act 2013 closed this by enacting s162A, which matches the liability against the excluded property it funded — the liability is not deductible from the UK estate.
Does the s162B restriction affect ordinary business loans (overdrafts, commercial mortgages)?
Yes, but the effect is often neutral. A commercial mortgage on business premises, or a business overdraft, is attributable to BPR-qualifying business assets. Under s162B, the liability is deducted from the gross value of the BPR-qualifying property rather than from the non-BPR estate. If the business property attracts 100% BPR, the net effect is zero: BPR on the gross value minus the liability = BPR on the net value. The gross value and the BPR rate are unchanged — the liability simply is applied first. The practical impact of s162B is therefore often limited to situations where the business property has only 50% BPR (e.g. land or buildings used for a qualifying business) — in which case moving the liability inside the BPR bucket means less is available for deduction against the 40% taxable estate.
What documentation should executors keep regarding liabilities?
Executors must be able to demonstrate that each liability claimed is: (1) genuine — a real debt owed to a third party; (2) attributable to specific assets (for BPR/APR property) or genuinely non-attributable (for general deductions); and (3) discharged after death (or, if not discharged, that there is a commercial reason for the non-discharge). HMRC's form IHT421 (liabilities schedule) requires executors to list all liabilities and identify any connected-party liabilities or unusual arrangements. For any unusual liability arrangements (connected-party loans, loans to fund offshore structures, circular debts), HMRC will scrutinise the s162A–162C analysis carefully. Legal advice should be obtained before completing the IHT return.
Are there transitional arrangements for existing home loan schemes?
Finance Act 2013 brought in the s162A restriction with effect from 17 July 2013. Pre-existing home loan scheme arrangements that were in place before that date are transitionally protected to the extent that the trust capital and the liability were both fixed before that date — but HMRC has interpreted this narrowly. Any scheme variations or top-ups after 17 July 2013 are caught. HMRC's technical guidance makes clear that schemes relying on pre-2013 transitional protection should be reviewed, as HMRC may challenge arrangements where the structure has been modified. Specialist advice should be obtained for any pre-2013 scheme still in operation.
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