Quick Succession Relief: Reclaiming IHT When Two Deaths Fall Within 5 Years
Quick succession relief (QSR) cuts the Inheritance Tax on a second estate when the same money or asset has already been taxed once within the previous five years. The relief slides from 100% if the two deaths fall within a year down to 20% in the fifth year — and because it is calculated, never automatic, executors miss it all the time.
When someone inherits and then dies soon after, the assets they received can be hit by Inheritance Tax (IHT) twice in quick succession — once in the estate they came from, and again in their own estate. Parliament built in a relief to soften that double charge: quick succession relief, set out in section 141 of the Inheritance Tax Act 1984. This guide explains exactly when it applies, the sliding scale of relief, and walks through a full worked calculation so you can see the numbers move.
- Trigger: the person who died was made better off by a chargeable transfer (usually an inheritance) on which IHT was paid, and that transfer happened within five years of their own death.
- Sliding scale: relief is 100% (within 1 year), 80% (1–2 yrs), 60% (2–3 yrs), 40% (3–4 yrs) and 20% (4–5 yrs) — per IHTA 1984 s141.
- It reduces tax, not the estate: QSR comes off the IHT bill of the second estate, not its taxable value.
- It is easy to miss: nothing flags it on the forms. The executor of the second estate has to spot the prior death, find the tax paid, and claim it in boxes 10–17 of the IHT400 calculation.
When does quick succession relief apply?
Three conditions all have to be met. They come straight from the statute and HMRC's own guidance:
- A chargeable transfer increased the deceased's estate. Most commonly this is an inheritance, but it can also be a lifetime gift that was itself a chargeable transfer. The key test is that the transfer increased the value of the person's estate.
- Inheritance Tax was actually charged on that earlier transfer. If the first estate paid no IHT (because it was within the nil-rate band, or fully spouse-exempt), there is no QSR — there is no earlier tax to give relief against.
- The deceased died within five years of that earlier transfer. Day one is the date of the first transfer; the clock runs to the date of the second death.
Note what QSR is not: it does not require the original asset to still exist in the second estate. The relief follows the value the person received, not a specific item. If your aunt inherited £200,000 and spent some of it before she died, QSR is still computed by reference to what she received and the tax paid on it — subject to the cap explained below. This is confirmed in HMRC's Inheritance Tax Manual at IHTM22041.
People assume "the same asset taxed twice within five years" means the executor has to trace a specific house or share portfolio through both estates. They don't. QSR works on the net value the deceased received from the first transfer and the IHT paid on it — the asset itself can be sold, spent or transformed.
The sliding relief scale
The whole logic of QSR is that the closer together the two deaths fall, the harsher the double charge feels — so the relief is most generous when the gap is shortest, and tapers away as time passes. The percentage depends only on the period between the first transfer and the second death:
| Period between first transfer and second death | Percentage of relief |
|---|---|
| 1 year or less | 100% |
| More than 1 year, up to 2 years | 80% |
| More than 2 years, up to 3 years | 60% |
| More than 3 years, up to 4 years | 40% |
| More than 4 years, up to 5 years | 20% |
| More than 5 years | No relief |
Source: Inheritance Tax Act 1984, s141. The percentage is applied to the tax that was charged on the value the deceased received.
How the relief is actually calculated
HMRC's IHT400 calculation does QSR in two stages. First it works out the tax attributable to what the deceased received; then it applies the relevant percentage. The working formula HMRC uses (boxes 10 to 17 of the IHT400 Calculation) is:
QSR = relevant % × tax paid on first transfer × (net value received ÷ gross value transferred)
In plain terms:
- Net value received = what actually reached the deceased — i.e. the gross legacy minus the IHT borne on it. This is the "increase" to their estate.
- Gross value transferred = the value transferred before that tax.
- The ratio (net ÷ gross) scales the tax down to the part that genuinely enriched the deceased, then the sliding-scale percentage taps it again for the time elapsed.
For most simple legacies, the first estate paid the IHT out of the residue and the beneficiary received their share gross of tax — in which case "net value received" and "gross value transferred" are close, and the calculation simplifies. The worked example below shows the mechanics end to end.
Worked example: an inheritance taxed, then a death two years later
The facts. Margaret dies in March 2024. Her estate has already used its nil-rate band, so IHT is charged at 40% on the top slice. She leaves a specific legacy with a net value of £150,000 to her brother, Arthur. The estate bears the tax on it, so the tax charged on the value Arthur received was £100,000 × ... — let's be precise.
To keep the figures clean: Margaret's executors calculated that the IHT attributable to Arthur's share — the tax on "so much of the value transferred as is attributable to the increase in Arthur's estate" — was £60,000. Arthur was genuinely enriched by £150,000 (his net inheritance), on which £60,000 of IHT had been charged in Margaret's estate.
Then Arthur dies in May 2026 — 2 years and 2 months after Margaret's death. His own estate is taxable. Because the gap is more than 2 years but not more than 3, the relevant percentage is 60%.
Step 1 — identify the tax charged on the value Arthur received in Margaret's estate:
£60,000.
Step 2 — find the relevant percentage from the date gap:
Arthur died 2 years 2 months after Margaret → band is "more than 2, up to 3 years" → 60%.
Step 3 — apply the percentage:
QSR = 60% × £60,000 = £36,000.
Step 4 — deduct from Arthur's estate's IHT bill. Suppose Arthur's own estate (after his nil-rate band) produces an IHT liability of £110,000 before reliefs. QSR comes off the tax:
£110,000 − £36,000 = £74,000 payable.
Result: Arthur's estate pays £36,000 less in Inheritance Tax than it would have if no one had spotted that he had inherited — and been taxed — from Margaret just over two years earlier.
Watch what would have changed the answer: if Arthur had died in February 2025 (11 months after Margaret), the relief would have been 100% × £60,000 = £60,000. If he had limped on to April 2029 (just over five years), there would be no relief at all. The single most valuable thing an executor can do is pin down the exact date gap.
| If Arthur died... | Gap | Relief % | QSR (on £60,000 tax) |
|---|---|---|---|
| Feb 2025 | 11 months | 100% | £60,000 |
| May 2026 (our example) | 2 yrs 2 mths | 60% | £36,000 |
| Aug 2027 | 3 yrs 5 mths | 40% | £24,000 |
| Jan 2029 | 4 yrs 10 mths | 20% | £12,000 |
| Jun 2029 | 5 yrs 3 mths | 0% | £0 |
Why executors miss QSR — and how to claim it
QSR is one of the most overlooked reliefs in UK estate administration, for a simple structural reason: nothing on the forms prompts you to look backwards. When you administer an estate, the IHT400 asks about that person's assets, gifts they made, and exemptions — it does not ask "did this person inherit anything in the last five years?" If the executor doesn't already know the deceased recently received a taxed inheritance, the relief never surfaces.
It is most often lost when:
- The two deaths are handled by different executors or different solicitors, so no single person sees both estates.
- The deceased didn't talk about a recent inheritance — especially a sibling's or partner's estate, rather than a parent's.
- The inheritance was spent or invested, so there is no obvious asset in the second estate pointing back to it.
- The estate is dealt with on the excepted-estate route first, and only later turns out to need a full IHT400 where QSR would have applied.
How to claim it
- Establish the first death. Ask the family directly: "Did the deceased inherit from anyone, or receive a large taxed gift, in the five years before they died?" Check bank statements for large credits and any solicitor correspondence.
- Get the figures from the first estate. You need (a) the net value the deceased received and (b) the IHT charged on that value. The first estate's solicitor or the executors' records, or HMRC's calculation for that estate, will show this.
- Confirm the date gap precisely — the percentage swings 20 points per year, so a few weeks can matter.
- Complete boxes 10 to 17 of the IHT400 Calculation. HMRC's guidance, IHTM22041 onward, walks through the figures; the relief is deducted from the tax payable, not the estate value.
- If the estate is already finalised and you have only just spotted it, you can still claim. HMRC will generally repay overpaid IHT where a valid claim is made within the statutory time limits — raise it in writing with the figures and the two dates.
Whenever you take on an estate where the deceased was widowed, or recently lost a sibling or close relative, treat "was there a taxed inheritance in the last five years?" as a standard opening question. It costs one sentence and can be worth tens of thousands in relief.
Frequently asked questions
Does QSR apply if the first estate paid no Inheritance Tax?
No. Quick succession relief gives relief against tax that was actually charged on the earlier transfer. If the first estate paid no IHT — because it fell within the nil-rate band, or was fully exempt (for example a spouse legacy) — there is no earlier tax, and therefore no QSR for the second estate.
Does the inherited asset have to still exist in the second estate?
No. QSR is calculated by reference to the net value the deceased received and the IHT charged on it, not a specific item. The original money or asset can have been spent, sold or reinvested. What matters is that a taxed transfer increased the deceased's estate within five years of their death.
How is the relief percentage decided?
Solely by the time between the first transfer and the second death: 100% within 1 year, 80% (1–2 years), 60% (2–3 years), 40% (3–4 years), 20% (4–5 years), and nothing after 5 years. The percentages are set in section 141 of the Inheritance Tax Act 1984.
Is QSR deducted from the taxable estate or from the tax bill?
From the tax bill. Unlike, say, business relief or agricultural relief (which reduce the taxable value of assets), QSR is a reduction of the Inheritance Tax payable by the second estate. You work out the tax due in the normal way, then subtract the QSR figure.
Where do I claim QSR on the IHT forms?
On the IHT400 Calculation, in boxes 10 to 17, where you set out the tax on the earlier transfer, the relevant percentage and the resulting relief. HMRC's Inheritance Tax Manual (IHTM22041 onward) explains the figures required.
Can I still claim QSR if the estate has already been settled?
Often, yes. If IHT has been overpaid because QSR was missed, you can make a written claim to HMRC with the supporting figures and the two dates, within the statutory time limits. HMRC will repay overpaid tax where the claim is valid. Take professional advice if the estate is closed or the time limit is tight.
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