What is the grossing up of gifts for inheritance tax?
Answered 17 March 2026
Grossing Up of Gifts for Inheritance Tax
What the law says
The statutory basis for grossing up is found in IHTA 1984, s.38, which governs the attribution of value to specific gifts in partly-exempt transfers.
Under s.38(1), the value transferred attributable to specific gifts corresponds to the value of those gifts. However, where a specific gift is chargeable (not exempt) and does not bear its own tax (i.e. the tax is paid from residue), the amount is "grossed up" — calculated as the amount arrived at under subsections (3) to (5).
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s.38(3) — Where the only chargeable gifts are specific gifts not bearing their own tax, the grossed-up amount is the aggregate of: (a) the sum of the value of those gifts, plus (b) the amount of tax that would be chargeable if the value transferred equalled that aggregate.
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s.38(4) — Where specific gifts not bearing their own tax are not the only chargeable gifts, the grossed-up amount is such amount as, after deduction of tax at the assumed rate (per s.38(5)), would equal the sum of the value of those gifts.
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s.38(2) — Where an exemption limit applies and gifts must be allocated, gifts bearing their own tax qualify for the exemption before gifts not bearing their own tax; otherwise gifts qualify in proportion to their values.
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s.38(6) — Disallowed but legally enforceable liabilities (e.g. under IHTA 1984, s.5(5) or FA 1986, s.103) are treated as specific gifts for grossing up purposes.
Abatement: Under IHTA 1984, s.37(2), if after grossing up the total value of all specific gifts exceeds the value transferred (the free estate), the value of the specific gifts must be reduced (abated) so their total equals the value of the free estate, in accordance with any order in the Will and the general law of abatement.
HMRC guidance / practice
What grossing up is: Grossing up is the process of calculating the chargeable part of the estate under IHTA 1984, s.38 when the partly-exempt transfer rules apply and a chargeable beneficiary takes a specific gift free of tax. Although it involves tax calculations, it is part of the process of valuing the chargeable transfer, not the assessing process.
Three types of grossing up calculation exist:
| Type | When used |
|---|---|
| Simple | All chargeable specific gifts are free of tax and the residue is wholly exempt |
| Four-stage | There are chargeable specific gifts free of tax and chargeable specific gifts bearing their own tax, and/or the residue is wholly or partly chargeable |
| 'Benham' | Very rare — where the testator provides for residuary beneficiaries to receive specified proportions after all IHT has been paid |
Information needed before calculating:
- The lifetime cumulative total
- The total value transferred at the relevant title
- The value of specific gifts split into three groups: (i) exempt gifts; (ii) chargeable specific gifts not bearing their own tax; (iii) chargeable specific gifts bearing their own tax
- The proportion of residue that is exempt
Simple grossing up applies where all chargeable gifts are specific gifts not bearing their own tax and there are no reliefs against tax. The gifts are grossed up at the rate appropriate to their total value, with slight variations depending on whether there is no lifetime cumulation, cumulation below the threshold, or cumulation above the threshold.
Four-stage calculation — Stage 4 (determining the final chargeable estate) involves: (J) totalling all chargeable specific gifts (grossed-up value plus those bearing their own tax); (K) adding exempt specific gifts; (L) deducting from the estate value to find residue; (M–N) identifying the chargeable part of residue; and (O) adding chargeable specific gifts to chargeable residue to arrive at the chargeable transfer.
Separate titles: Under IHTA 1984, s.40, where the death estate includes property chargeable under more than one title (e.g. free estate, settled property, joint property), each title is looked at separately and in isolation for grossing purposes.
Worked example (simple grossing, no lifetime cumulation, nil-rate band £234,000): Chargeable specific gifts free of tax = £264,000. Excess over nil-rate band = £30,000. Grossed up: £30,000 × (100 ÷ 60) = £50,000 + £234,000 = £284,000 grossed-up value.
Citation sources
Continuing using the lettering of paragraphs started at IHTM26154, the procedure for the fourth stage (IHTM26152) (determining the chargeable part of the estate) is as follows: J: Find the total of all the chargeable specific gifts (IHTM26011) by adding together the grossed up value at paragraph I of IHTM26155, and the total value of any chargeable specific gifts which do bear their own tax (IHTM26003) K: Find the total value of all the specific gifts by adding together the total value of all th
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Before starting the grossing calculation, you should make a note of the figures and values you will need. These are the lifetime cumulative total (IHTM31413) the total value transferred (IHTM04028) at the title where grossing up is required the value (as reduced under interaction (IHTM26101) provisions if appropriate) of the specific gifts (IHTM26011) at that title in three separate groups the value of the exempt gifts the value of the chargeable specific gifts which do not bear their own tax th
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PART II EXEMPT TRANSFERS CHAPTER III ALLOCATION OF EXEMPTIONS Attribution of value to specific gifts. 38 1 Such part of the value transferred shall be attributable to specific gifts as corresponds to the value of the gifts; but if or to the extent that the gifts— a are not gifts with respect to which the transfer is exempt or are outside the limit up to which the transfer is exempt, and b do not bear their own tax, the amount corresponding to the value of the gifts shall be taken to be the amoun
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