Inheritance Tax on £3 Million Estate UK: How Much IHT, All RNRB Tapered Away, and Reduction Strategies (2026)
At £3 million, both the single person and couple RNRB are fully tapered to zero. A single person faces £1,070,000 in IHT; a couple faces £940,000. The right combination of lifetime PETs, AIM BPR, and charitable giving can cut this to £300,000 — but only lifetime gifts can restore the RNRB.
| Scenario | Threshold | Taxable | IHT | Notes |
|---|---|---|---|---|
| Single, £3m, no planning | £325,000 (NRB only) | £2,675,000 | £1,070,000 | RNRB fully tapered at £2.35m; at £3m RNRB = £0; threshold = NRB only |
| Couple (survivor's estate), £3m, tNRBs + tRNRBs — all RNRB tapered away | £650,000 (tNRBs only; combined tRNRBs = £0) | £2,350,000 | £940,000 | Combined RNRB tapers to zero at £2.7m; at £3m couple loses all £350k combined RNRB |
| Single, £3m, 10% charitable legacy + 36% rate | £325,000 (NRB only) | £2,407,500 (£3m − £267.5k charity − £325k) | £866,700 (36% rate) | Charity £267,500 (10% of baseline £2,675k) + 36% rate (s36 IHTA); RNRB still £0; IHT saving £203k; charity gets £267.5k for £64k net family cost |
| Couple, £3m, AIM BPR £1m (2yr+; 100% exempt to April 2026 cap) | £650,000 (tNRBs; RNRB fully tapered) | £1,350,000 (£3m − £1m AIM − £650k) | £540,000 | BPR saves £400k IHT; does NOT restore RNRB (s8F IHTA taper: adjusted estate = £3m including AIM) |
| Couple, £3m, lifetime PETs £1m (survived 7yr; estate at death = £2m) | £1,000,000 (full tNRBs + full tRNRBs restored at £2m) | £1,000,000 | £400,000 | PETs reduce estate to £2m; full £350k combined RNRB restored; saving £540k vs no planning |
| Couple, £3m, AIM BPR £1m + PETs £500k (7yr; estate at death = £2.5m) | £750,000 (tNRBs + partial tRNRBs: excess £500k; reduction £250k; remaining RNRB £100k) | £750,000 (£2.5m − £1m AIM − £750k) | £300,000 | Combined strategy: BPR + PETs + partial RNRB restoration; saving £640k vs couple no-planning |
| Single, £3m + £500k SIPP (from April 2027: pension enters estate) | £325,000 (NRB; RNRB = £0) | £3,175,000 (£3.5m estate − £325k) | £1,270,000 | £200k additional IHT from pension alone; urgent: draw down + invest in AIM BPR pre-April 2027 |
IHT: 40% standard rate (s7 IHTA 1984); 36% reduced rate (s36 IHTA — ≥10% of baseline to charity). NRB: £325,000 per person (frozen to 2030 — s8C IHTA). RNRB: £175,000 (s8D IHTA; frozen to 2030). RNRB taper: s8E IHTA — £1 per £2 above £2m adjusted net estate. Single RNRB fully tapered at £2,350,000. Couple combined RNRB (£350k) fully tapered at £2,700,000. At £3m: both RNRB = £0. Transferred NRB: s8A IHTA (IHT402). Adjusted net estate for taper: s8F IHTA 1984 — INCLUDES BPR/APR qualifying assets at full value BEFORE relief (AIM shares counted in taper estate). Only ACTUAL gifts (PETs, annual exemption, normal expenditure from income) reduce the adjusted net estate. BPR: s105(1)(bb) IHTA 1984 — AIM 100% after 2yr; £1m combined BPR/APR cap from April 2026 (excess 50% exempt). PETs: s3A IHTA 1984 — 7yr clock; taper relief years 3-7 (s7(4) IHTA). Normal expenditure from income: s21 IHTA — uncapped; immediate. April 2027: DC pensions enter estate. Couple scenarios: 100% first death → surviving spouse (s18 spousal exemption); all relief claims made on second death. IHT cash flow: payable 6 months after death (s226 IHTA); before probate — executors may need to borrow.
IHT on £3 Million Estate: Complete Guide
IHT on a £3 million estate — both the single and couple RNRB are fully gone
At £3,000,000, the RNRB is fully tapered to zero for BOTH single people and couples. The RNRB taper (s8E IHTA 1984) eliminates the RNRB at £1 per £2 above £2m. For a single person (RNRB = £175,000): £175,000 / (£1/£2) = £350,000 excess eliminates the full RNRB → fully tapered at £2,350,000. At £3m, the RNRB = £0. For a married couple (combined RNRB = £350,000): £350,000 / (£1/£2) = £700,000 excess eliminates both RNRBs → fully tapered at £2,700,000. At £3m, the combined RNRB = £0. The only threshold available is the Nil Rate Band: £325,000 per person (£650,000 for a couple using the transferred NRB — s8A IHTA 1984). Single person: threshold = £325,000; taxable = £2,675,000; IHT = £1,070,000. Married couple (survivor's estate): threshold = £650,000 (transferred NRBs); taxable = £2,350,000; IHT = £940,000. At this estate size, the IHT bill itself is approaching the size of many people's total estate — and it must be paid by the estate within 6 months of death (s226 IHTA 1984) before probate is granted. This creates a cash flow challenge: executors may need to borrow against the estate or sell assets to pay IHT before probate is granted. Planning at this level is not optional — it is urgent.
Lifetime gifts are the highest-impact tool for a £3 million estate
For a couple with a £3m estate, giving away £1m in lifetime gifts (PETs under s3A IHTA 1984) that survive 7 years reduces the estate to £2m at death. The effect: the RNRB is restored fully (at £2m, the taper has not started); the threshold becomes £1,000,000 (tNRBs + tRNRBs); taxable = £1,000,000; IHT = £400,000. This is a saving of £540,000 compared to no planning (£940,000). The key mechanism: giving below £2m restores the £350,000 combined RNRB — which is worth £140,000 in IHT saving at 40% — in addition to the direct reduction from the gift (£1m out of the estate × 40% = £400,000 IHT on the gifted amount). Total combined saving = £540,000. The 7-year rule: if the donor dies within 7 years, the PET is brought back into the estate (s3A IHTA 1984 — chargeable transfer). Taper relief (s7(4) IHTA 1984) reduces the IHT due on the gift in years 3-7: years 3-4: 20% off; 4-5: 40% off; 5-6: 60% off; 6-7: 80% off. Gifts in years 1-3 receive no taper. Practical tools: (1) annual exemption (s19 IHTA): £3,000 per person per year — modest for a £3m estate but certain; carry-forward 1 year = £6,000 per person; (2) normal expenditure from income (s21 IHTA): uncapped; immediate; from income surplus (investment income, rental income, pension income) — can be £20,000-£100,000+ per year for a high-income couple; (3) large PETs: outright gifts to children of £200,000-£500,000 — no cap; no IHT on survival of 7 years; no HMRC reporting required for the gift itself (reported on death if within 7yr).
AIM BPR for a £3 million estate — powerful but limited by the April 2026 cap
AIM Business Property Relief (s105(1)(bb) IHTA 1984) at 100% after 2 years remains the most capital-efficient IHT shelter for a £3m estate — no gifting, no 7-year clock, no loss of access to the capital. However, from April 2026 (Budget 2024), the combined BPR/APR cap means only the first £1,000,000 of qualifying BPR/APR assets is fully exempt — the excess is 50% exempt (20% effective IHT rate on the excess). For a couple's £3m estate with £1m in AIM BPR qualifying shares: (a) AIM BPR £1m = 100% exempt; no IHT on the AIM shares; (b) remaining estate = £2m; (c) RNRB taper: adjusted net estate (s8F IHTA) = £3m INCLUDING the AIM shares; so taper threshold still at £3m → combined RNRB = £0; (d) threshold = £650,000 (tNRBs only); (e) taxable = £3m − £1m AIM − £650k = £1,350,000; (f) IHT = 40% × £1,350,000 = £540,000; saving vs no BPR: £400,000. The s8F IHTA interaction is critical: AIM BPR reduces IHT on the AIM shares but DOES NOT reduce the adjusted net estate for RNRB taper purposes. Only ACTUAL removal of assets from the estate (via lifetime gifts) reduces the taper estate. Combining AIM BPR with lifetime PETs delivers the optimal outcome: AIM BPR protects the investment portfolio without the 7-year clock; PETs reduce the gross estate below the taper threshold to restore the RNRB.
The 36% reduced IHT rate — strategic charitable giving at £3 million
Section 36 IHTA 1984 (Finance Act 2012) reduces the IHT rate from 40% to 36% when at least 10% of the 'baseline amount' is left to charity. At £3m for a single person: RNRB = £0 (fully tapered); baseline = estate − NRB − RNRB = £3m − £325k − £0 = £2,675,000; 10% of baseline = £267,500 minimum charitable gift. With £267,500 to charity and 36% rate: chargeable estate = £3m − £267,500 = £2,732,500; taxable = £2,732,500 − £325,000 = £2,407,500; IHT = 36% × £2,407,500 = £866,700. IHT saving vs standard 40% (£1,070,000): £203,300. The charity receives £267,500 for a net family cost of £267,500 − £203,300 = £64,200. HMRC effectively contributes £203,300 out of every £267,500 charitable donation at this estate size (76% funded by HMRC). The 36% rate is particularly powerful at £3m because: (a) the higher the IHT bill, the larger the 40%→36% saving; (b) the charity gift threshold (10% of baseline) is high but HMRC subsidises most of it; (c) the charity gift can be structured as a percentage of residuary estate (not a fixed sum) so it adjusts automatically as the estate value changes. Wording in the will should use 'the lower of X% of my residuary estate or £X' to prevent unexpected outcomes. A charitable remainder interest in a trust is also possible but complex.
The April 2027 pension reform — the hidden addition to a £3 million estate
From 6 April 2027, unspent DC pension funds (SIPPs, personal pensions, group DC schemes) will be included in the IHT estate. For a person with a £3m estate and a £500,000 SIPP: currently the SIPP is outside IHT; from April 2027 the total estate = £3.5m; IHT = 40% × (£3.5m − £325,000) = 40% × £3,175,000 = £1,270,000 — an additional £200,000 IHT from the pension alone. For a couple: the first spouse's SIPP may pass to the surviving spouse (spousal exemption — s18 IHTA 1984 if the pension pays to the spouse directly, though pension death benefits are technically outside s18 and depend on trustee discretion; from April 2027 the IHT mechanism may involve the pension trustees paying IHT before releasing death benefits). This is an area of significant legislative complexity that has yet to be finalised in detailed regulations. Strategies to address the April 2027 reform for a £3m + pension estate: (1) Drawdown now: take the pension as income before April 2027; taxable as income but reduces the IHT estate; reinvest in AIM BPR shares (100% exempt after 2 years) or gift as PETs (7yr) or as normal expenditure from income (s21 IHTA — immediate, uncapped); (2) Pension to AIM: draw pension → invest in AIM BPR → pension becomes AIM portfolio (in estate but exempt after 2yr); (3) Pension consolidation: combine pensions into a SIPP; review nominations; (4) For amounts near or below the NRB: drawdown to use the NRB efficiently (pension below £325k is IHT-free within the NRB).
Frequently Asked Questions
How much inheritance tax is due on a £3 million estate?
At £3,000,000: single person — the RNRB is fully tapered to zero (taper completes at £2,350,000); threshold = NRB £325,000 only; taxable = £2,675,000; IHT = £1,070,000. Married couple (survivor's estate) — the combined RNRB is also fully tapered to zero (couple taper completes at £2,700,000); threshold = transferred NRBs £650,000 only; taxable = £2,350,000; IHT = £940,000. No amount of trust planning for the home restores the RNRB at this level — the RNRB is simply gone. The only ways to reduce the IHT are: lifetime gifts (PETs) to bring the estate below £2m; AIM BPR (saves IHT on the AIM shares but does not restore the RNRB); charitable legacy (36% rate on the chargeable estate); or a combination of all three.
Is there any way to save the RNRB on a £3 million estate?
The RNRB cannot be saved at £3m through trust planning alone — it is fully tapered to zero for both single people (at £2.35m) and couples (at £2.7m). The ONLY way to restore the RNRB is to ACTUALLY reduce the adjusted net estate (s8F IHTA 1984) below £2m (for a single person) or below £2.7m (for a couple's combined RNRB). This means lifetime gifts — PETs (s3A IHTA), annual exemption (s19 IHTA), or normal expenditure from income (s21 IHTA). For a couple, giving away £1m (survived 7yr) reduces the estate to £2m and restores the full £350,000 combined RNRB, saving £540,000 in IHT total. AIM BPR does NOT restore the RNRB — BPR reduces the IHT on the AIM shares but HMRC uses the gross estate including AIM shares when calculating the taper (s8F IHTA).
What is the most effective IHT planning for a £3 million estate?
For a couple with a £3m estate: (1) Lifetime PETs (s3A IHTA) to bring the estate below £2m — gives the highest saving (£540,000 for a £1m gift survived 7yr); (2) AIM BPR — £1m in qualifying AIM shares (100% exempt after 2yr; subject to £1m combined BPR/APR cap from April 2026); saves £400,000 with no 7-year risk; (3) Combine both: AIM BPR £1m + PETs £500k → estate at death £2.5m (after PETs) with £1m AIM BPR; IHT ≈ £300,000 (saving £640,000); (4) 36% charitable legacy: leave 10% of baseline to charity (≥£267,500 for a single £3m estate); IHT falls from £1,070k to £867k; saving £203k at HMRC's expense; (5) Normal expenditure from income (s21 IHTA): uncapped; immediate; reduces the estate progressively from income surplus. April 2027 pension reform: draw down SIPP before 2027 and reinvest in AIM BPR to pre-empt the pension IHT charge.
Does AIM BPR reduce the IHT on a £3 million estate?
Yes — but it does not restore the RNRB. AIM qualifying shares (s105(1)(bb) IHTA 1984) held for 2+ years are 100% exempt from IHT (subject to the £1m combined BPR/APR cap from April 2026). For a couple's £3m estate with £1m AIM BPR: the AIM shares are 100% exempt; IHT is calculated on the remaining estate = £3m − £1m AIM − £650k (tNRBs) = £1,350,000; IHT = £540,000. Saving: £400,000 vs no BPR. However: HMRC uses the adjusted net estate (s8F IHTA 1984) including the AIM shares when calculating the RNRB taper. So at £3m with £1m AIM BPR, the taper estate is still £3m → RNRB = £0. Only lifetime gifts that ACTUALLY remove assets from the estate can restore the RNRB. The combination of AIM BPR (£1m, no 7yr clock) and PETs (£500k+, 7yr) delivers the best combined IHT reduction at this estate size.
How does the 36% charitable giving rate work at £3 million?
Under s36 IHTA 1984: if at least 10% of the 'baseline amount' is left to charity, the IHT rate drops from 40% to 36% on the entire chargeable estate. For a single person with a £3m estate: RNRB = £0 (tapered); baseline = £3m − £325k (NRB) − £0 (RNRB) = £2,675,000; 10% of baseline = £267,500 minimum charitable gift. With £267,500 to charity and 36% rate: chargeable estate = £2,732,500; taxable = £2,407,500; IHT = 36% × £2,407,500 = £866,700. IHT saving (vs 40% on full estate = £1,070,000): £203,300. The charitable legacy costs the family only £64,200 in net inheritance — HMRC effectively contributes £203,300 out of the £267,500 donation (76%). The charity receives £267,500 for a £64,200 net family cost — a highly efficient arrangement. Use a percentage-of-residue legacy in the will to avoid a fixed sum becoming disproportionate as estate values change.
At £3m, Every Year of Delay Costs Thousands
The IHT clock starts from the date of the first gift — not from when you decide to act. A 7-year PET programme started now can save £540,000 for a couple. The will still matters: ensure the correct trust structure and charitable legacy are in place. WillSafe will kits from £39.99.
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