Inheritance Tax on £2 Million Estate UK: RNRB Taper, All Scenarios, and How to Reduce It (2026)
A £2m estate is exactly at the RNRB taper threshold — full RNRB still available at that precise figure. Above £2m, the effective IHT marginal rate reaches 80% for widows losing both RNRB and tRNRB. Reducing the estate below £2m can save up to £140,000 in IHT.
| Scenario | Estate | Thresholds Available | Chargeable | IHT Due | Notes |
|---|---|---|---|---|---|
| 1. Single — NRB only (no qualifying residential property, or property not passing to lineal descendants) | £2,000,000 | NRB: £325,000 only. No RNRB (no qualifying property or not to lineal descendants or to discretionary trust). No tNRB; no tRNRB. | £2,000,000 − £325,000 = £1,675,000 | £670,000 | Common for: estates without residential property; property leaving to discretionary trust (RNRB not available); property passing to non-lineal descendants (siblings, friends). At £2m: no RNRB taper risk — the taper only applies if RNRB is available (which it is not in this scenario). |
| 2. Single — NRB + RNRB (qualifying residential property to lineal descendants absolutely or via IPDI) | £2,000,000 | NRB: £325,000 + RNRB: £175,000. Adjusted net estate = £2m exactly — at the RNRB taper threshold but NOT above it; full RNRB available (taper begins ABOVE £2m, not at £2m). | £2,000,000 − £325,000 − £175,000 = £1,500,000 | £600,000 | Critical point: at exactly £2m the full RNRB is still available. The taper (s8E IHTA) reduces RNRB by £1 for every £2 ABOVE £2m — at £2m itself, taper = £0. This means reducing the estate from £2.01m to £1.99m (e.g., by a charitable gift) saves: at £2.01m, taper = £0.01m ÷ 2 = £5,000 RNRB lost → extra IHT = £5,000 × 40% = £2,000. Marginal rate just above £2m for those losing RNRB: 60% effective marginal IHT rate (lose £1 RNRB per £2 above threshold = save 40p IHT per £1 RNRB lost, so effectively 60p IHT per £1 of estate growth above £2m until RNRB is exhausted). |
| 3. Widowed — all 4 thresholds (tNRB + NRB + tRNRB + RNRB = £1m) | £2,000,000 | NRB £325k + tNRB £325k + RNRB £175k + tRNRB £175k = £1,000,000. Adjusted net estate = £2m exactly — RNRB and tRNRB taper at £0 (no taper at exactly £2m). | £2,000,000 − £1,000,000 = £1,000,000 | £400,000 | tNRB: IHT402 must be filed (NOT automatic). tRNRB: IHT436 must be filed (NOT automatic). At £2m: all 4 thresholds available in full. Marginal rate just above £2m: each £2 of growth above £2m costs: £1 RNRB lost + £1 tRNRB lost = £2 of combined threshold lost = IHT on £2 of extra estate + IHT saved on £2 of thresholds = 40% × £2 + 40% × £2 = 80p extra IHT per £1 of estate growth above £2m (until both RNRB and tRNRB are fully tapered at £2.7m). This is one of the steepest IHT marginal rates possible. |
| 4. Single at £2.3m — RNRB partially tapered | £2,300,000 | NRB: £325k. RNRB taper: (£2.3m − £2m) ÷ 2 = £150k reduction → reduced RNRB = £175k − £150k = £25k | £2,300,000 − £325,000 − £25,000 = £1,950,000 | £780,000 | RNRB taper (s8E IHTA 1984): the adjusted net estate (ANE) is the net estate (after liabilities and exemptions) before deducting the RNRB/tRNRB. The taper reduces RNRB by £1 for every £2 of ANE above £2m. At £2.3m ANE: excess above £2m = £300k; taper = £300k ÷ 2 = £150k; reduced RNRB = max(£175k − £150k, £0) = £25k. The 'adjusted net estate' for taper purposes includes the value of assets in the estate BEFORE the RNRB or tRNRB is deducted — so both thresholds are reduced by the same taper formula applied to the same ANE. |
| 5. Single at £2.35m — RNRB fully tapered (zero RNRB) | £2,350,000 | NRB: £325k only. RNRB taper: (£2.35m − £2m) ÷ 2 = £175k = full RNRB → RNRB = £0 | £2,350,000 − £325,000 = £2,025,000 | £810,000 | At £2.35m, the RNRB is fully tapered to £0 for a single person. This is the 'cliff': below £2m = full £175k RNRB; at £2.35m = £0 RNRB. The value of the RNRB between these two points: £175k × 40% = £70k IHT saving if the estate is below £2m vs above £2.35m. Any estate planning that reduces the ANE from £2.35m to below £2m (a reduction of £350k) restores the full £175k RNRB — saving £70k IHT. POSSIBLE STRATEGIES: PETs to children > 7yr ago already excluded; lifetime gifts (PETs — s3A IHTA); charitable bequest in will (reduces ANE immediately at death); BPR-qualifying investments (reduce ANE by BPR amount). |
| 6. Widowed at £2.5m — RNRB and tRNRB both fully tapered | £2,500,000 | NRB £325k + tNRB £325k = £650k. RNRB taper: (£2.5m − £2m) ÷ 2 = £250k > £175k → RNRB = £0. tRNRB taper: same formula → tRNRB = £0. Only NRB + tNRB remain. | £2,500,000 − £650,000 = £1,850,000 | £740,000 | At £2.5m, both RNRB and tRNRB are fully tapered. The full £1m combined threshold is reduced to £650k (NRB + tNRB only). Value of lost RNRB + tRNRB: £350k × 40% = £140k. Any estate planning reducing ANE from £2.5m to below £2m (a reduction of £500k) restores the full £350k (RNRB + tRNRB), saving £140k in IHT. Between £2m and £2.7m (for a widowed person), the marginal effective IHT rate on estate growth is 80% — for every additional £1 of estate above £2m, 80p goes to HMRC (because both RNRB and tRNRB are being tapered at 50p per £1 of estate, each contributing 40% × 50p = 20p IHT saved per pound of taper loss = net 40% × £1 estate growth + 40% × £1 lost threshold = 80%). |
| 7. Widowed at £2.7m — RNRB and tRNRB both fully tapered; BPR in estate | £2,700,000 including £400k BPR-qualifying AIM shares (held 2yr+) | BPR: £400k × 100% = £400k deduction. ANE for taper: £2.7m (calculated on estate BEFORE BPR deduction — BPR is not a liability reducing ANE for taper purposes; the ANE definition in s8E IHTA excludes BPR/APR relief assets from the calculation in a specific way). Specialist advice needed. Assuming ANE = £2.7m: RNRB = £0; tRNRB = £0. NRB + tNRB = £650k. Chargeable (excluding BPR assets): £2.7m − £400k BPR = £2.3m − £650k = £1.65m × 40% | £660,000 | Important: the adjusted net estate (ANE) calculation for the RNRB taper (s8E IHTA) does NOT simply subtract BPR assets from the estate value. The Finance Act 2016 rules are specific about what constitutes the ANE. HMRC guidance IHTM46005: the ANE is broadly the net value of the estate after liabilities but BEFORE deducting any BPR/APR relief. This means a £2.7m estate with £400k BPR assets may still have an ANE of £2.7m for taper purposes — so the RNRB remains fully tapered even with BPR. Specialist advice is essential on ANE and BPR interactions. April 2026 BPR cap: £1m combined BPR/APR cap introduced (Finance Act 2026) — assets above £1m qualifying for BPR/APR receive 50% relief only. |
IHT on £2 million estate UK 2026. NRB: £325,000 (s8C IHTA 1984 — frozen to April 2030). RNRB: £175,000 (s8D IHTA). RNRB taper: s8E IHTA — £1 reduction per £2 of adjusted net estate (ANE) above £2,000,000. RNRB fully tapered at £2,350,000 ANE (single). tRNRB: s8G IHTA — transferred RNRB; tapered by same formula. Both RNRB and tRNRB fully tapered at £2,700,000 ANE (widowed). tNRB: s8A IHTA — IHT402 (NOT automatic). tRNRB: IHT436 (NOT automatic). Effective marginal IHT rate in taper zone: 60% (single, losing RNRB); 80% (widowed, losing RNRB + tRNRB). ANE definition: net estate before RNRB/tRNRB deduction; includes settled property with qualifying interest in possession; BPR/APR assets deduction from ANE complex — specialist advice required (HMRC IHTM46005). Spousal exemption: s18 IHTA — unlimited; first death to survivor resets and transfers both NRBs. 36% rate: s36 IHTA — ≥10% of baseline to qualifying charity. BPR: ss103-114 IHTA — 100%/50%; £1m combined BPR/APR cap from April 2026 (Finance Act 2026). APR: ss115-124 IHTA. Charitable bequest: s23 IHTA — reduces ANE; may also trigger 36% rate. Mortgage/liability deduction: s5(3) IHTA — reduces ANE. IHT400 submitted with IHT402/IHT421/IHT436. IHT paid 6 months after end of month of death (s226 IHTA). Instalment option: s227 IHTA — 10 annual instalments on qualifying property.
£2 Million Estate IHT: Complete Guide
The RNRB taper — how losing the Residence Nil-Rate Band hits hard above £2 million
The Residence Nil-Rate Band (RNRB — s8D IHTA 1984, £175k for 2026/27) is one of the most valuable IHT thresholds available — but it is subject to a taper that progressively reduces it for larger estates. The taper rule (s8E IHTA): the RNRB is reduced by £1 for every £2 of 'adjusted net estate' (ANE) above £2,000,000. The ANE is broadly the net estate value (after liabilities, debts, and other deductions) before the RNRB or tRNRB is applied. Taper starts: above £2,000,000 (not at £2m — the £2m point itself still has full RNRB). Taper completes (RNRB = £0): at £2m + (2 × £175k) = £2,350,000 for a single person. For a widowed person claiming both RNRB and tRNRB (each £175k = combined £350k): both are tapered at the same rate. Combined taper completes at: £2m + (2 × £350k) = £2,700,000. The effective marginal IHT rate in the taper zone: for every £2 increase in estate above £2m, £1 of RNRB is lost. Each £1 of RNRB lost = £1 more chargeable estate = 40p more IHT. So for every £1 of estate growth above £2m, the effective marginal IHT rate is 40% (normal rate) + 20% (from losing 50p of RNRB per £1 of estate growth × 40%) = 60% effective marginal rate for a single person. For a widowed person losing both RNRB and tRNRB: 40% + 40% = 80% effective marginal rate in the taper zone (one of the highest effective tax rates in the UK tax system).
Reducing the adjusted net estate below £2 million — the highest-return planning available
For estates near the £2m threshold, reducing the adjusted net estate below £2m restores the full RNRB (and tRNRB for a widowed person) — potentially saving £70k (single person, restoring £175k RNRB) or £140k (widowed person, restoring £350k combined RNRB + tRNRB) in IHT. This makes planning to get the ANE below £2m extremely high-return. Strategies to reduce the ANE below £2m: (1) Charitable bequest in the will (s23 IHTA): a legacy to a qualifying charity immediately reduces the ANE by the legacy amount (charity gifts are deducted from the estate before IHT). If a charitable legacy of £100k brings the ANE from £2.1m to £2m: the RNRB is restored in full (£175k); IHT saving = £175k × 40% - £100k × 40% = £70k - £40k = £30k net saving (the £100k charity gift costs £40k less IHT on the residue, but saves £70k RNRB IHT — net benefit £30k). (2) BPR-qualifying investments (ss103-114 IHTA): investing in AIM-listed shares qualifying for 100% BPR reduces the chargeable estate (and may reduce the ANE for taper purposes — specialist advice needed on the ANE calculation for BPR assets). (3) Lifetime PETs (s3A IHTA): gifts to children made more than 7 years before death are excluded from the estate AND from the ANE — reducing both the chargeable estate and the RNRB taper. Making annual gifts of £6k-£30k per year (annual exemption + normal expenditure from income) reduces the estate steadily over time. (4) Life insurance in trust: a term or whole-of-life policy written in trust provides a lump sum to pay IHT without increasing the estate.
The RNRB taper and the 60% and 80% effective marginal IHT rates
The RNRB taper creates some of the highest effective marginal IHT rates in the UK tax system. Understanding these rates is critical for planning around the £2m threshold. For a single person with RNRB available: below £2m: effective marginal rate = 40% (normal). Between £2m and £2.35m: effective marginal rate = 60% (40% on the extra estate + 20% from the RNRB taper). Above £2.35m: RNRB = £0; effective rate returns to 40%. For a widowed person with RNRB + tRNRB: below £2m: effective marginal rate = 40%. Between £2m and £2.7m: effective marginal rate = 80% (40% on the extra estate + 40% from the combined RNRB + tRNRB taper). Above £2.7m: RNRB and tRNRB = £0; effective rate returns to 40%. The practical consequence: for a widowed person with an estate of £2.2m, reducing the estate by £200k (e.g., through lifetime gifts to children) saves not just £200k × 40% = £80k in IHT — it also restores £100k of combined RNRB + tRNRB (because the estate is reduced by £200k and the taper reduces RNRB by £100k per £200k of estate above £2m), saving a further £100k × 40% = £40k. Total saving: £120k on a £200k gift — a 60% return in IHT savings in the taper zone. This is the most financially compelling IHT planning argument for estates between £2m and £2.7m.
The adjusted net estate (ANE) — what counts toward the taper threshold
The 'adjusted net estate' (ANE) is the value used to determine whether and how much the RNRB taper applies. It is not simply the gross estate value. The ANE is broadly: the net estate value (after deducting liabilities, debts, mortgages, and reasonable funeral expenses) BEFORE the RNRB, tRNRB, or other IHT reliefs are applied. What IS included in the ANE: all assets passing on death (property, investments, cash, business assets, pension pots from April 2027); settled property where the deceased had a qualifying interest in possession; all transfers of value in the 7 years before death (PETs and CLTs that are drawn back into the estate on death — whether or not they are still charged to IHT after taper relief). What is NOT included in the ANE: assets passing by survivorship (JT property — not in the estate at all); assets with outright BPR/APR relief — HMRC guidance indicates qualifying BPR/APR assets are deducted from the ANE (this is complex and specific to the provisions in Finance Act 2016 and HMRC IHTM46005 — specialist advice is essential). The interaction of BPR and ANE is complex: an estate of £2.5m including £600k of 100% BPR AIM shares may or may not have an ANE below £2m depending on the specific BPR rules — professional advice is essential for estates near the taper threshold that also include BPR assets.
Practical planning for £2 million estates — strategies that work
For estates at or above £2m, the available planning strategies broadly fall into two groups: (A) Strategies to reduce the ANE below £2m — the highest-return planning for restoring RNRB: (1) Lifetime PETs to children (s3A IHTA) — made 7+ years before death: both reduce the estate AND reduce the ANE. Start early; the estate may have been at or below £2m 7-10 years ago, meaning early PETs were especially valuable. (2) Normal expenditure from income (s21 IHTA) — uncapped; immediate; reduces estate over time. (3) BPR-qualifying investments — AIM shares, EIS/SEIS investments, qualifying unlisted businesses: 100% BPR may reduce the ANE (specialist advice needed on ANE calculation). Subject to April 2026 £1m combined BPR/APR cap. (4) Charitable bequest in will — reduces ANE on death (charity deducted from estate before IHT); may trigger 36% rate (s36 IHTA) if ≥10% of baseline to charity. (B) Strategies to reduce the overall IHT bill for estates that remain above £2m: (5) Life insurance written in trust — provides a lump sum to pay IHT without reducing the estate; premiums paid from normal expenditure from income (s21 IHTA) may be exempt. (6) Will structuring — ensure RNRB is available wherever possible: property to children absolutely or via IPDI (not discretionary trust); tNRB (IHT402) and tRNRB (IHT436) claimed on IHT400. (7) Deed of variation (s142 IHTA — within 2 years of death): beneficiaries can redirect inherited assets to charity, children, or other arrangements to achieve retrospective IHT efficiency.
Frequently Asked Questions
How much inheritance tax on a £2 million estate UK?
It depends on circumstances: Single, no RNRB (property not to children or no qualifying property): £2m − £325k NRB = £1.675m × 40% = £670,000 IHT. Single, with NRB + RNRB (property to children): £2m − £500k = £1.5m × 40% = £600,000 IHT. At exactly £2m, the RNRB taper has NOT yet reduced the RNRB — full £175k RNRB still available. Widowed person with all 4 thresholds (tNRB £325k + NRB £325k + tRNRB £175k + RNRB £175k = £1m): £2m − £1m = £1m × 40% = £400,000 IHT. Married couple at second death: same as widowed = £400,000 IHT. Note: tNRB (IHT402) and tRNRB (IHT436) must be proactively claimed by the executor — they are NOT automatic. Above £2m: the RNRB taper (s8E IHTA) begins — £1 of RNRB lost per £2 of estate above £2m.
What is the RNRB taper and when does it apply?
The Residence Nil-Rate Band (RNRB) taper (s8E IHTA 1984) reduces the RNRB by £1 for every £2 of adjusted net estate (ANE) above £2,000,000. At exactly £2m: full RNRB (£175k) available. Above £2m: taper begins. RNRB reduced to £0 at: £2m + (2 × £175k) = £2,350,000 for a single person. For a widowed person claiming both RNRB (£175k) and tRNRB (£175k): both are tapered; taper completes at £2m + (2 × £350k) = £2,700,000. The effective marginal IHT rate in the taper zone: 60% for a single person losing RNRB; 80% for a widowed person losing both RNRB and tRNRB. Planning: reducing the ANE below £2m restores the full RNRB — saving up to £70k (single) or £140k (widowed) in IHT.
Does a £2 million estate qualify for the Residence Nil-Rate Band?
At exactly £2m, yes — the RNRB is fully available if the conditions are met. The RNRB taper (s8E IHTA) begins ABOVE £2m, not at £2m. Conditions for the RNRB (s8D IHTA): (1) qualifying residential property (a property the deceased lived in at some point — s8H IHTA); (2) passing to lineal descendants (children, grandchildren, step-children, adopted children, foster children — s8K IHTA) either absolutely or via IPDI (s49A IHTA); (3) NOT to a discretionary trust; (4) estate below £2.35m (for full RNRB on single estate; below £2.7m for full RNRB + tRNRB on widowed estate). At £2m the estate is exactly at the taper threshold — any estate growth above £2m starts reducing the RNRB at 60-80% effective marginal rate.
At what estate value does the RNRB disappear completely?
The RNRB (s8E IHTA) tapers to £0 at: £2,350,000 adjusted net estate for a single person (RNRB £175k tapers at £1/£2 above £2m → fully tapered at £2m + 2 × £175k = £2.35m). Both RNRB and tRNRB taper to £0 at: £2,700,000 for a widowed person (RNRB + tRNRB combined = £350k → fully tapered at £2m + 2 × £350k = £2.7m). Above these thresholds, the RNRB (and tRNRB) are zero — only the NRB (and tNRB) remain. Planning significance: reducing the estate from above these thresholds to below £2m saves up to £70k IHT (single) or £140k IHT (widowed) by restoring the full RNRB and/or tRNRB.
What can I do to reduce IHT on a £2 million estate?
The highest-priority planning for a £2m estate is: (1) Keep the adjusted net estate below £2m to retain the full RNRB and tRNRB — lifetime giving (PETs to children via s3A IHTA; annual exemption s19 IHTA; normal expenditure from income s21 IHTA) and charitable bequests in the will (s23 IHTA) both reduce the ANE. (2) Will structure: ensure the residential property passes to lineal descendants (children/grandchildren) absolutely or via IPDI (s49A IHTA) — NOT to a discretionary trust. (3) Claim tNRB (IHT402) and tRNRB (IHT436) for widowed persons — NOT automatic; executor must file these forms. (4) BPR: investing in qualifying AIM shares (100% BPR after 2yr holding — ss103-114 IHTA; £1m combined BPR/APR cap from April 2026) reduces the chargeable estate and potentially the ANE. (5) 36% charitable rate (s36 IHTA): if ≥10% of the baseline goes to charity, the reduced 36% rate applies on the remaining chargeable estate. (6) Life insurance in trust: write a whole-of-life policy in trust to provide funds to meet the IHT bill without the estate being sold.
A £2m Estate Needs Active IHT Planning — Start with the Will
The difference between a well-structured will and a poorly drafted one can exceed £200k in IHT on a £2m estate. RNRB, tNRB, and tRNRB must all be preserved. WillSafe will kits from £39.99.
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