IHT Planning After Selling a Property UK: What to Do With the Proceeds to Reduce Inheritance Tax (2026)
Selling a property turns an asset into cash — but cash has no IHT reliefs. If the main home was sold, the RNRB (up to £175,000 additional threshold) may be lost. The sale creates or increases an IHT liability at 40% above the NRB. Act immediately: AIM shares (BPR after 2 years), PETs to children, pension contributions before April 2027, and review the downsizing addition.
| Scenario | RNRB Available? | IHT Threshold | Action |
|---|---|---|---|
| Main home retained — passes to children in will | Yes (£175k) | £500,000 | Review will ensures home passes to direct descendants |
| Main home sold — proceeds held as cash | No (cash only) | £325,000 NRB only | Downsizing addition (if will passes other assets to descendants) |
| Main home downsized — smaller home + cash | Partial (smaller home value) | £325k + RNRB on smaller home | Downsizing addition for balance; AIM/PETs for cash |
| Buy-to-let sold — proceeds held as cash | No (BTL never qualified) | £325,000 NRB only | AIM BPR shares, PETs, pension contributions |
Assumes estate above £325k NRB. RNRB tapers for estates above £2m. Married couple thresholds are double the above.
IHT Planning After a Property Sale: Complete Guide
Why selling a property creates an immediate IHT problem
Property held at death typically benefits from at least some IHT advantages: the RNRB (Residence Nil-Rate Band — s8D IHTA 1984) provides up to £175,000 of additional threshold when the main home passes to direct descendants; for landlords, the instalment option (s227 IHTA 1984) allows IHT on property to be paid in 10 annual instalments rather than in a single lump sum. Once the property is sold and the proceeds sit as cash: (1) The RNRB is no longer available — cash does not qualify; the RNRB requires the actual property (or qualifying shares in a property fund in some cases) to pass to direct descendants; (2) The instalment option is not available on cash — IHT on cash assets is due in a single payment 6 months after the month of death; (3) Cash has no reliefs — BPR and APR do not apply to cash. The IHT estate is now entirely liquid, which means the executors can pay IHT promptly — but the entire taxable estate is at 40% above the NRB with no exemptions or reliefs to reduce it. Example: sell a £500,000 property with £175,000 RNRB in place = RNRB applies, IHT threshold effectively £500,000. Hold the £500,000 as cash = RNRB not available on cash, IHT threshold reverts to NRB only (£325,000), taxable estate = £175,000, IHT = £70,000. The sale has created a £70,000 IHT bill that wouldn't exist if the property had been kept and passed to children.
Main home sale: downsizing and the RNRB downsizing addition
Where you sell (downsize from) your main home and replace with a smaller home, or sell and move into rented accommodation or care, the RNRB downsizing addition (s8FA IHTA 1984) may partially or fully preserve the RNRB. The downsizing addition conditions: (1) You owned the original home on or after 8 July 2015; (2) The original home would have qualified for the RNRB (it was a qualifying residential interest — essentially the main home); (3) At the time of death, the estate includes other assets (not the old home) that pass to direct descendants; (4) A claim for the downsizing addition is made in the IHT return. The downsizing addition is: the lower of (a) the RNRB that would have applied to the old home and (b) the value of other assets passing to direct descendants. It ensures that downsizing for good reasons (care needs, smaller house, releasing equity) does not penalise the estate by losing the RNRB. It does NOT apply where the property was sold as part of a tax avoidance scheme or where the RNRB would not have applied to the old home (e.g. if the home was not a qualifying residential interest). Key action: update the will after selling the main home to ensure a sufficient amount of the residuary estate passes to direct descendants — this is needed for the downsizing addition to work.
Buy-to-let and investment property sale: converting to AIM shares
The sale of a buy-to-let or investment property converts property (which had no IHT reliefs — landlord property does not qualify for BPR or RNRB) into cash (which also has no IHT reliefs). The IHT position is therefore unchanged — but the form of the asset has changed from illiquid property to liquid cash. The immediate opportunity: invest the sale proceeds in AIM-listed shares that qualify for BPR (s105(1)(bb) IHTA 1984). After holding for two years, the AIM shares are 100% BPR-exempt (up to the £1m combined cap from April 2026; above £1m: 50% BPR, effective 20% IHT rate on the excess). Comparison: (a) Keep proceeds as cash — 40% IHT on the amount above NRB; (b) Invest in AIM BPR portfolio — after 2 years, 100% IHT-exempt (on first £1m). The opportunity cost of delay: every month the proceeds sit as cash is a month of the two-year BPR clock lost. A £300,000 investment in AIM shares on 1 June 2026 qualifies for BPR on 1 June 2028 — saving £120,000 in IHT (40% × £300,000). CGT consideration: the AIM shares investment is not a disposal for CGT (cash to shares is a purchase). However, when the AIM shares are later sold (or the estate sells them), CGT applies on gains above the purchase price.
Gifting the proceeds: PETs to children and grandchildren
Gifting some or all of the sale proceeds to children or grandchildren is a Potentially Exempt Transfer (PET — s3A IHTA 1984). The gift is exempt from IHT if the donor survives seven years from the date of the gift. If death occurs in years 3–7, taper relief reduces the IHT: year 3–4 (32%); year 4–5 (24%); year 5–6 (16%); year 6–7 (8%). The key rule: the seven-year clock starts on the date the gift is made, not the date of the property sale. Make gifts as soon as possible after the property sale — delay costs time on the clock. Practical considerations: (1) Keep a written record of the gift (date, amount, recipient) — the estate will need to report the gift on form IHT403; (2) Make sure the gift is genuine — the donor must give up control of the money; (3) If making a very large gift, consider a deed of gift. Annual exemption: use the £3,000 annual exemption first — it is immediately IHT-exempt (no seven-year clock) and does not affect the NRB. The annual exemption can be used alongside a PET in the same tax year. The amount of the PET is whatever is left after the annual exemption has been used.
Pension contributions before April 2027: the remaining window
If you have earnings in the tax year of the property sale (or in subsequent years), pension contributions reduce your income tax bill AND the pension fund is currently outside the IHT estate (until 6 April 2027). This creates an opportunity: use some of the sale proceeds to live on while maximising pension contributions from salary — the pension fund grows outside the IHT estate while the cash estate is depleted. Annual pension contribution limit: up to 100% of earnings or £60,000 (whichever is lower) with carry-forward of unused allowances from the previous three years. After April 2027, pensions will be brought into the IHT estate (Budget 2024 reform). For older people who have already retired: pension contributions may not be available (no earnings). For those who have recently sold a property and are still working, this window should be maximised before April 2027.
Whole-of-life insurance in trust: funding the new IHT bill
If the property sale has created or substantially increased an IHT liability, a whole-of-life assurance policy written in trust can fund the increased IHT bill. The payout on death goes to the trust beneficiaries outside the estate — providing cash to pay the IHT without the executors having to sell other assets. Premium calculation: work out the IHT liability on the estate including the sale proceeds, and take out a policy for that sum assured. Premium payments from surplus income may qualify as normal expenditure from income (s21 IHTA 1984 — immediately IHT-exempt). For older people: whole-of-life premiums will be higher, and the policy should be taken out as soon as possible after the property sale. The policy in trust (MWP Act 1882 trust for a spouse/civil partner, or a discretionary trust for other beneficiaries) keeps the payout outside the estate.
Frequently Asked Questions
Does selling a property increase my inheritance tax liability?
It depends on the property and the estate context. If you sell your main home and the RNRB (Residence Nil-Rate Band — s8D IHTA 1984) was available on it, selling converts a property benefiting from up to £175,000 RNRB into cash (which does not qualify for RNRB). This can create or increase an IHT liability by up to £70,000 (40% × £175,000 RNRB lost). If you sell a buy-to-let or investment property, these do not qualify for RNRB or BPR — so the IHT position is similar to cash; but the proceeds now sit in a liquid form making it easier to act. In all cases, plan immediately: AIM shares, PETs, pension contributions, and annual gifting are the key tools.
What is the RNRB downsizing addition after selling my main home?
The downsizing addition (s8FA IHTA 1984) preserves some or all of the RNRB when you sell (downsize from) your main home after 8 July 2015, provided: the old home would have qualified for RNRB; other assets pass to direct descendants at death; a claim is made in the IHT return. The downsizing addition equals the lesser of (a) the RNRB that would have applied to the old home and (b) the value of other assets passing to direct descendants. Update your will to ensure sufficient assets pass to direct descendants (children, grandchildren) — this is the mechanism that activates the downsizing addition.
Should I invest property sale proceeds in AIM shares to reduce IHT?
AIM shares qualifying for BPR (s105(1)(bb) IHTA 1984) achieve 100% IHT exemption after 2 years of holding (up to £1m combined BPR/APR cap from April 2026; 50% BPR above £1m). This is significantly faster than the 7-year PET clock. On £300,000 invested in qualifying AIM shares, the IHT saving after 2 years is £120,000 (40% × £300,000). Key caveat: AIM shares carry higher investment risk than cash, and not all AIM shares qualify for BPR — use a specialist AIM BPR portfolio manager. The investment should be made as soon as possible after the property sale to start the 2-year clock.
Can I give away property sale proceeds to reduce inheritance tax?
Yes — gifts of the proceeds to individuals are PETs (s3A IHTA 1984), exempt after 7 years (with taper relief from year 3). Give as soon as possible after the property sale — every day's delay is a day lost on the 7-year clock. Use the annual exemption (£3,000) first — it is immediately IHT-exempt without a 7-year requirement. Keep a written record of all gifts (date, amount, recipient) to support the IHT return on your death.
Do I need to update my will after selling my main home?
Yes — immediately, especially if the RNRB or downsizing addition is relevant. After selling the main home: (1) Ensure the will directs sufficient assets to direct descendants to activate the downsizing addition; (2) Consider whether the charitable 36% legacy is now appropriate given the changed estate; (3) Review whether the will's beneficiary structure still reflects your wishes; (4) Update any specific property bequests (the property no longer exists). Also update pension nominations and check your LPA is in place.
Update Your Will After Selling Your Property
A property sale changes your estate — your will should reflect the new asset profile and ensure the RNRB downsizing addition works correctly. WillSafe will kits for England and Wales make it easy to update your will when your circumstances change.
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