RNRB Downsizing Addition UK: How It Works, Qualifying Conditions, and Claiming on Form LD1 (2026)
Sold the family home and moved to a smaller property or a care home? The RNRB downsizing addition (ss8FA-8FE IHTA 1984) prevents the £175k RNRB from being lost — but only if the executors actively claim it on form LD1 within 2 years.
| Scenario | Former QRI | QRI at Death | Lost RNRB | Downsizing Addition & IHT Impact | Claim LD1? |
|---|---|---|---|---|---|
| Sold family home £600k; moved to care home (no property at death); estate of £400k passes to children | £600k (sold post-8 July 2015) | £0 (no property at death) | £175k (RNRB max − £0 = £175k) | £175k — lower of (£175k lost RNRB, £400k other assets). Full RNRB recovered via downsizing addition. IHT saving: £70k (40% × £175k) | YES |
| Sold large home £800k; bought smaller property £250k; rest of estate £300k passes to children | £800k (sold post-8 July 2015) | £250k (new smaller home in estate) | £175k − £175k = £0 (the £250k property covers the full £175k RNRB; no RNRB lost — new home exceeds RNRB cap) | £0 — no lost RNRB if new property value ≥ RNRB cap (£175k) | NO |
| Sold large home £800k; bought smaller property £100k; rest of estate £350k passes to children | £800k (sold post-8 July 2015) | £100k (new smaller home) | £175k − £100k = £75k lost RNRB | £75k — lower of (£75k lost RNRB, £350k other closely inherited). Total RNRB = £100k (from home) + £75k (downsizing) = £175k. Full RNRB recovered. | YES |
| First spouse sold home (JT property); moved to care home; died with no property; estate £500k to surviving spouse via will trust (IPDI) | £400k (50% JT share; sold post-8 July 2015) | £0 | £175k (RNRB max) | £0 — the downsizing addition requires other assets passing to DIRECT DESCENDANTS (children, grandchildren, step-children). Assets passing to spouse (even in IPDI trust) do NOT count as 'closely inherited' for downsizing purposes. RNRB is preserved for second spouse's estate instead via tRNRB | YES |
| Both conditions met but RNRB taper applies — estate £2.3m; sold home £500k; no property at death; estate to children | £500k (sold post-8 July 2015) | £0 | £175k | £175k BEFORE taper. BUT taper: estate £2.3m > £2m threshold; excess £300k; RNRB reduced by £300k ÷ 2 = £150k. Net RNRB (including downsizing) = £175k − £150k = £25k only. Taper significantly reduces the benefit | YES |
| Gifted home to children in lifetime (post-8 July 2015); retained no property; died with estate £300k (cash/investments) to children | £400k (gifted — disposed of — post-8 July 2015) | £0 (no property at death) | £175k | £175k — lower of (£175k lost RNRB, £300k other closely inherited). Full RNRB recovered via downsizing addition. Note: gifted home may be a GWR if deceased lived there rent-free (s102 FA1986) — if GWR applies, home is still in estate anyway and no downsizing addition is needed | YES |
RNRB downsizing addition: ss8FA-8FE IHTA 1984 (Finance Act 2016). QRI = qualifying residential interest (home in estate or formerly in estate). Disposal on/after 8 July 2015 required (s8FA(1)(a) IHTA). Calculation (s8FB IHTA): downsizing addition = lower of (a) lost RNRB (RNRB cap − QRI value at death) and (b) value of other QFRI assets closely inherited by direct descendants. NOT automatic — claim on HMRC form LD1; deadline 2 years from end of tax year of death; HMRC has discretion to accept late claims. RNRB taper (s8E IHTA): if estate exceeds £2m, combined RNRB (standard + downsizing) reduced £1 per £2 excess. tRNRB (s8G IHTA): unused RNRB (including downsizing) from first death transfers as percentage; claim IHT436 on second death (not automatic). GWR (s102 FA1986): if former home subject to GWR (deceased still living there rent-free), home IS in estate — downsizing addition not needed. Direct descendants: s8K IHTA — children, grandchildren, step-children, foster children (adopted during minority). RNRB cap 2026-27: £175k (frozen to at least 2030). Max IHT saving from full downsizing addition: 40% × £175k = £70,000 per person.
RNRB Downsizing Addition: Complete Guide
Why the RNRB downsizing addition was introduced
The Residence Nil Rate Band (RNRB — s8D IHTA 1984) was introduced by Finance Act 2016 to provide an additional IHT threshold (£175k per person by 2020-21, frozen to at least 2030) for estates where the family home passes to direct descendants. Without the downsizing addition, the RNRB would be unfair in several common situations: (1) an elderly person sells their family home to move into a care home — they have NO qualifying residential interest (QRI) at death and would lose the entire RNRB, creating a perverse incentive to retain property even when impractical; (2) a person downsizes from a large family home to a smaller property — their remaining property is worth less than the RNRB cap (£175k), meaning part of the RNRB is wasted; (3) a person gives their home to their children in lifetime (not a GWR — no retained benefit) and then dies with no property — again, no QRI and RNRB lost. The downsizing addition (ss8FA-8FE IHTA 1984) fixes this by allowing the executors to CLAIM an additional RNRB-equivalent amount (the 'downsizing addition') against other assets in the estate passing to direct descendants, provided the conditions are met. Key point: the downsizing addition is NOT automatic — it must be actively claimed on form LD1, submitted to HMRC, within 2 years of the end of the tax year in which the deceased died.
The qualifying conditions in detail — ss8FA and 8FB IHTA 1984
Five conditions must be met for the downsizing addition to apply (s8FA IHTA 1984): (1) Former qualifying residential interest: the deceased must have formerly held a qualifying residential interest (QRI) — a home that was their main or part residential interest included in the estate (or would have been included if they had not disposed of it). For the downsizing addition, the former home does NOT need to have been the deceased's main residence throughout — it just needs to have been a qualifying residential interest at some point. (2) Disposal on or after 8 July 2015: the disposal of the former home (sale, gift, transfer, any form of disposal) must have occurred on or after 8 July 2015 (the date when RNRB was announced in the Summer Budget 2015). Disposals before 8 July 2015 cannot trigger the downsizing addition regardless of when the person died. (3) Reduced or no QRI at death: at the date of death, the deceased must either own no qualifying residential interest at all (e.g., sold their home and moved to a care home, rented property, or lived with relatives) OR own a qualifying residential interest of lower value than the RNRB cap (£175k). If the QRI at death is worth £175k or more, no RNRB is lost and no downsizing addition is needed. (4) Closely inherited other assets: the estate must include other assets (NOT the QRI) that are 'closely inherited' by direct descendants — children, grandchildren, step-children, foster children of the deceased. These other assets form the pool against which the downsizing addition is calculated. If ALL assets pass to a spouse/charity/friend with nothing passing to direct descendants, the downsizing addition is NOT available (there are no closely inherited other assets to apply it to). (5) Active claim by executors: the executors must complete and submit form LD1 to HMRC — within 2 years from the end of the tax year in which the death occurred (so if death is in January 2026 (tax year 2025-26 ending 5 April 2026), the claim deadline is 5 April 2028). HMRC has discretion to accept late claims where there is a reasonable excuse.
How the downsizing addition is calculated — the step-by-step method
The downsizing addition is calculated under s8FB IHTA 1984: Step 1 — calculate the 'lost RNRB': the lost RNRB is the maximum RNRB available (£175k for 2026-27, or whatever the cap is in the year of death) minus the value of the qualifying residential interest (QRI) actually in the estate at death. If there is no QRI at death: lost RNRB = £175k (the full RNRB). If QRI at death is worth £100k: lost RNRB = £175k - £100k = £75k. If QRI at death is worth £200k (exceeds RNRB cap): lost RNRB = £0 (no addition needed — the QRI covers the full RNRB). Step 2 — calculate the 'available downsizing addition': the available downsizing addition is the LOWER of: (a) the lost RNRB (from Step 1); and (b) the value of 'qualifying former residential interest assets' (QFRI assets) — the value of other assets in the estate that are closely inherited by direct descendants (other than the QRI itself). Step 3 — apply the RNRB taper: if the total estate (including the QRI, QFRI assets, and all other assets) exceeds the RNRB taper threshold (£2,000,000), the combined RNRB (including the downsizing addition) is reduced by £1 for every £2 the estate exceeds £2m. The taper can significantly reduce the benefit of the downsizing addition for larger estates. Worked example (simple): deceased sold family home (worth £500k) and moved to a care home. Died with estate = £400k (savings and investments) leaving everything to children. Lost RNRB = £175k. Other closely inherited assets = £400k. Downsizing addition = £175k (lower of £175k and £400k). Total effective RNRB = £175k (via downsizing addition). IHT saving = 40% × £175k = £70,000. Estate of £400k: NRB (£325k) covers £325k; RNRB (downsizing addition £175k) — but the estate is only £400k; effective threshold = £325k + £175k = £500k but estate is £400k, so no IHT. If NRB alone: £400k - £325k = £75k chargeable; IHT = £30k. With downsizing addition: £0 IHT.
Claiming the downsizing addition — form LD1 and the 2-year deadline
The downsizing addition is NOT automatic. Executors must actively claim it. How to claim: (1) Form LD1: HMRC's 'Claim for residence nil rate band' form; submitted with or separately from the IHT400 return; the form requires details of the former home (address, date of disposal, value at disposal), any QRI at death, and the value of other closely inherited assets. (2) If the estate is an excepted estate (below £1m, IHT = £0): the executors may not need to complete a full IHT400; the LD1 can still be submitted to HMRC to establish the downsizing addition, even for estates that don't otherwise require a full IHT return. (3) Deadline: the claim must be made within 2 years from the end of the tax year of death. For a death in January 2026 (tax year 2025-26, ending 5 April 2026): deadline = 5 April 2028. For a death in June 2025 (tax year 2025-26): same 5 April 2028 deadline. HMRC has discretion to accept a late claim where there is a reasonable excuse. Missing the deadline: if executors miss the 2-year deadline without a reasonable excuse, the downsizing addition is lost permanently. This can represent a significant IHT cost (up to £70k per person). Awareness of the deadline is critical — particularly when a person sold their home months or years before death and the executors need to investigate the property history. Transferring the downsizing addition: if the first spouse to die did not use the full RNRB (including any downsizing addition), the unused amount is transferred as a percentage to the surviving spouse's estate via the tRNRB mechanism (s8G IHTA — IHT436 — NOT automatic; same 2-year deadline from end of tax year of second death).
The downsizing addition and care home planning
The RNRB downsizing addition is particularly valuable for people who sold their family home to fund care home costs. Scenario: elderly person (widow; estate = £600k after selling house; all to children): without downsizing addition — NRB £325k; chargeable £275k; IHT = £110k. With downsizing addition (LD1 claimed): NRB £325k + RNRB £175k (downsizing) = £500k threshold; chargeable £100k; IHT = £40k. Saving = £70k. The interaction with the local authority means test: the fact that the former home was sold for care costs does NOT affect the downsizing addition. The disposal of the home triggers the downsizing addition eligibility (post-8 July 2015); the care home means test and the IHT regime are entirely separate. The deliberately deprivation rules (Care Act 2014) do not affect the downsizing addition calculation — the LA means test may include the former home value in the financial assessment (if the home was gifted, not sold), but this is a separate question from the IHT RNRB treatment. For care home residents who retained property in their estate (didn't sell): if the home passes to children under the will (or is inherited), the standard RNRB applies (no downsizing addition needed — the QRI is in the estate). The downsizing addition is only relevant when the QRI is NOT in the estate or is worth less than £175k at death. Documentation: executors need to gather evidence of the former home (address; date of disposal; sale proceeds or gift value). This information may be in the deceased's records, conveyancing file, or solicitor's file. Early investigation is important — particularly for deaths where the home was sold many years before death and records may be harder to find.
Frequently Asked Questions
What is the RNRB downsizing addition?
The RNRB downsizing addition (ss8FA-8FE IHTA 1984) is a mechanism that allows the full Residence Nil Rate Band (RNRB — £175k per person) to be claimed against an estate even when the deceased no longer owned a qualifying home at death (or owned a home worth less than £175k). It is designed to prevent people losing the RNRB simply because they sold or gave away their home before death — for example, by downsizing, moving to a care home, or making a lifetime gift. Qualifying conditions: (1) the deceased formerly owned a qualifying residential interest disposed of on or after 8 July 2015; (2) at death, the estate contains no QRI or a lower-value QRI; (3) other assets in the estate closely inherit to direct descendants; (4) executors actively claim on form LD1 within 2 years from the end of the tax year of death. The addition is NOT automatic — it must be claimed.
How do I claim the RNRB downsizing addition?
The downsizing addition must be claimed by the executors on HMRC form LD1 ('Claim for residence nil rate band'). The form is submitted to HMRC (typically alongside or after the IHT400 return, or separately for excepted estates). The deadline for the claim is 2 years from the end of the tax year in which the deceased died (so for a death in any month of the 2025-26 tax year — 6 April 2025 to 5 April 2026 — the deadline is 5 April 2028). HMRC has discretion to accept late claims where there is a reasonable excuse. Form LD1 requires: the address of the former qualifying home; the date it was disposed of; its value at disposal; details of any QRI in the estate at death; the value of other assets closely inherited by direct descendants. If the LD1 is not submitted, the downsizing addition is lost — which can mean up to £70,000 in avoidable IHT (40% × £175k).
Does the RNRB downsizing addition apply when someone sold their home to pay for care?
Yes — if a person sold their qualifying home on or after 8 July 2015 to pay for care (e.g., to fund care home fees), the downsizing addition is potentially available to their estate. The fact that the proceeds were spent on care costs doesn't matter — the disposal of the qualifying home on or after 8 July 2015 satisfies the first qualifying condition. If at death the person owns no property (all funds spent on care or remaining as savings/investments), the 'lost RNRB' is the full £175k. The downsizing addition = the lower of £175k and the value of other closely inherited assets (cash, savings, investments passing to direct descendants). This can save up to £70,000 in IHT. Executors must claim on form LD1 within the 2-year deadline. The LA means test regime (Care Act 2014) is entirely separate from the RNRB downsizing addition — the two regimes are independent.
Is the RNRB downsizing addition available if the home was gifted (not sold) before death?
Yes — a lifetime gift of the qualifying home (on or after 8 July 2015) also triggers the downsizing addition eligibility, provided the other conditions are met. The disposal can be any form of disposal — sale, gift, transfer, or any other event that removes the home from the deceased's estate. However: if the home was gifted but the deceased continued to live there rent-free without paying full market rent, the gift is a 'Gift with Reservation' (GWR — s102 FA1986) — the home remains in the estate for IHT purposes as if it was never gifted, so no downsizing addition is needed (the home IS in the estate). The downsizing addition is only relevant when the home is genuinely out of the estate. If the GWR applies, the full RNRB is available on the home in the estate in the normal way.
Can the RNRB downsizing addition be transferred between spouses?
Yes — unused RNRB (including any unused downsizing addition from the first death) can be transferred to the surviving spouse's estate via the transferred RNRB (tRNRB) mechanism (s8G IHTA 1984). The amount transferred is expressed as a percentage of the RNRB — if the first spouse used none of their RNRB, 100% transfers; if they used half, 50% transfers. The transferred amount is applied against the RNRB cap at the time of the second death. The tRNRB claim is made on IHT436 — it is NOT automatic. The deadline is 2 years from the end of the tax year of the second death. For the downsizing addition specifically: if the first spouse sold their home (triggering downsizing addition eligibility) but their estate passed entirely to the surviving spouse (s18 exempt — no closely inherited assets to direct descendants on first death), no downsizing addition is claimed on the first death; instead, the 100% unused RNRB is transferred via tRNRB to the second death, where the full £350k combined RNRB (own + transferred) can then be claimed — including any downsizing element — against the second estate.
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