Nil Rate Band Trust Winding Up UK (2026): How to Wind Up a Legacy Discretionary Will Trust After the Transferable Nil Rate Band

A nil-rate band (NRB) discretionary will trust is a trust set up in a will to receive assets equal in value to the nil-rate band on the first death in a married couple. It was widely used in wills drafted before 09 October 2007 — the date the transferable nil-rate band (TNRB) was introduced: (1) THE PURPOSE — MAKING USE OF THE FIRST SPOUSE'S NRB: before October 2007, the nil-rate band (currently £325,000 — frozen until at least April 2030) could NOT be transferred between spouses on death. If the first spouse left their entire estate to the surviving spouse (using the spousal exemption), the first spouse's NRB was wasted. On the survivor's death, the entire combined estate would be above the NRB — with no transferred NRB available; (2) THE SOLUTION — NRB TRUST: a nil-rate band trust solved this by directing assets equal to the NRB (at the first death) into a discretionary trust for the benefit of the family (often including the surviving spouse as a discretionary beneficiary). This used up the first spouse's NRB at the first death, reducing the taxable estate on the second death; (3) THE NRB TRUST'S ASSETS: typically the trust was funded with: (a) a fixed sum of cash equal to the NRB; (b) a loan note or an IOU from the surviving spouse (the 'debt and charge scheme') — the surviving spouse borrowing the NRB-sized assets from the trust, with the loan outstanding on their death reducing the survivor's estate. This variant was effective but complex and required careful administration; (4) THE TNRB — WHY THE NRB TRUST BECAME UNNECESSARY FOR MOST COUPLES: from 09 October 2007, IHTA 1984 s.8A-8C allowed the unused nil-rate band of a deceased spouse or civil partner to be transferred to the survivor. A surviving spouse who uses the TNRB can effectively double their nil-rate band — making the NRB trust mechanism unnecessary for most straightforward estates. Thousands of wills still contain NRB trust clauses that the draftsman never thought to update after 2007.

IHTA 1984 s.144 is the key provision that allows an NRB discretionary will trust to be wound up tax-efficiently by appointing trust assets to the surviving spouse within two years of the first death: (1) THE S.144 READ-BACK PRINCIPLE: s.144(1) provides that where, within TWO YEARS of a person's death, property comprised in a discretionary will trust is appointed to a beneficiary by the trustees, the appointment is treated as if it were a direct gift from the deceased to that beneficiary — 'reading back' into the will. No exit charge or proportionate charge arises; (2) APPOINTING TO THE SURVIVING SPOUSE — FULL SPOUSAL EXEMPTION: if the trustees appoint the NRB trust assets to the SURVIVING SPOUSE within two years, the s.144 read-back means the appointment is treated as a direct gift from the deceased to the surviving spouse. The spousal exemption (IHTA 1984 s.18) then applies to the entire gift — meaning NO IHT is payable on the NRB trust assets at the first death. The result is exactly the same as if the first spouse had simply left everything to the survivor (but using s.144 read-back rather than the original will); (3) TNRB ON THE SECOND DEATH: because the NRB was not actually used at the first death (the s.144 appointment to the spouse removes the tax consequence), the TNRB is available to the survivor on their own death. The full transferred NRB is preserved for use at the second death — giving the same IHT result as if there had never been an NRB trust; (4) THE TWO-YEAR DEADLINE IS CRITICAL: the s.144 appointment MUST be made within two years of the death. Once the two-year window has passed, the NRB trust continues as a live discretionary trust — subject to periodic charges (every 10 years) and exit charges. If the trust has been running for more than two years, a different approach is needed (see below); (5) S.144(1A) ANTI-AVOIDANCE — NO QUALIFYING IIP: since Finance Act 2006, s.144 cannot be used to create a qualifying immediate interest in possession (IIP) within the first two years and then read it back — this would have allowed the trust assets to pass to the spouse with full IIP status and spousal exemption, which Parliament blocked.

If the two-year s.144 window has passed, the NRB trust is a live discretionary trust and different options apply: (1) THE ONGOING IHT TREATMENT OF A DISCRETIONARY TRUST: a discretionary trust is subject to the 'relevant property' regime (IHTA 1984 ss.58–85): (a) PERIODIC CHARGE: every 10 years on the trust anniversary, a periodic charge of up to 6% of the trust's value above the available NRB applies; (b) EXIT CHARGE: when property leaves the trust (e.g. by appointment to a beneficiary), an exit charge applies — a proportion of the periodic charge rate; (2) APPOINTING TO THE SURVIVING SPOUSE AFTER TWO YEARS — EXIT CHARGE: if the trustees appoint the NRB trust assets to the surviving spouse more than two years after the first death, the s.144 read-back does NOT apply. The appointment is a distribution from a discretionary trust — subject to an exit charge at the appropriate rate (which may be nil or very low in the early years); (3) SAUNDERS V VAUTIER — COLLAPSING THE TRUST: if the surviving spouse is the SOLE adult beneficiary with capacity, or if all the adult beneficiaries with capacity consent, the trust can be collapsed under the rule in Saunders v Vautier — requiring the trustees to hand over the trust fund directly. No court involvement is required if all beneficiaries are adult, sui juris, and together are absolutely entitled; (4) TRUSTEE ACT 1925 s.57 — COURT AUTHORIZATION: where the trust contains minor beneficiaries who cannot consent, the trustees can apply to the court under TA 1925 s.57 to sanction an expedient transaction (including early distribution) where it is in the interests of the trust and beneficiaries generally; (5) DEED OF APPOINTMENT — WIND UP: where none of the above apply, the trustees execute a formal DEED OF APPOINTMENT distributing all the trust assets to the beneficiaries (the surviving spouse and/or any other designated beneficiaries). Exit charges and any outstanding trust debts must be settled. The trust then has no assets and ceases to be a trust; (6) TRUST REGISTRATION SERVICE: any NRB trust that has been administered (i.e. the trustees have exercised any discretion or the trust has held assets) must be registered on the HMRC Trust Registration Service (TRS). This includes wound-up NRB trusts that were taxable during their life.

Capital Gains Tax (CGT) is a separate consideration from IHT when an NRB trust is wound up: (1) CGT ON DISTRIBUTION FROM A DISCRETIONARY TRUST: when a trustee of a discretionary trust distributes assets to a beneficiary, this is a DISPOSAL for CGT purposes under TCGA 1992. The disposal proceeds are deemed to be the market value of the assets at the date of distribution. The gain (market value minus the trustees' base cost — which is typically the market value at the date the assets entered the trust) may be chargeable at the trust CGT rate (currently 24% — effective from 30 October 2024); (2) TCGA 1992 s.62(6) — READ-BACK WITH S.144: where an appointment is made WITHIN TWO YEARS of the first death and the s.144 IHT read-back applies, TCGA 1992 s.62(6) provides a corresponding CGT read-back — the appointee (e.g. the surviving spouse) takes the assets at their PROBATE VALUE (the market value at the date of the first death). This means: (a) there is no CGT on the distribution itself; (b) the surviving spouse takes a base cost equal to the probate value; (3) S.58 — SPOUSE TRANSFER: separately from the s.144/s.62(6) read-back, any disposal between spouses who are living together is made on a 'no gain, no loss' basis under TCGA 1992 s.58. This means that even outside the two-year window, distributing trust assets to the surviving spouse may trigger little or no CGT gain if the spouse is still alive and the trustees and the spouse are connected persons; (4) HOLDOVER RELIEF — GIFTS BETWEEN CONNECTED PERSONS: where a discretionary trust distributes assets more than two years after the first death, holdover relief under TCGA 1992 s.260 (gifts on which IHT exit charges arise) or s.165 (business assets) may be available — allowing the gain to be 'held over' and the beneficiary to take over the trustees' base cost; (5) ANNUAL EXEMPT AMOUNT FOR TRUSTS: discretionary trusts have their own CGT annual exempt amount — currently one-half of the individual exempt amount (£3,000 — so £1,500 for the trust as at 2026). This is a relatively small allowance; trustees should be aware of the gain implications when considering whether to distribute in-specie or sell assets before distribution.

Practical checklist for winding up an NRB discretionary will trust: (1) IDENTIFY WHETHER YOU ARE IN THE TWO-YEAR WINDOW: check the date of death. If less than two years have elapsed, a s.144 appointment to the surviving spouse is the most tax-efficient route — consider this urgently. Do NOT let the two-year window expire without taking advice; (2) INSTRUCT A SOLICITOR TO DRAFT A DEED OF APPOINTMENT: a deed of appointment (or resolution of the trustees, where the trust deed permits resolutions) is required to distribute the trust assets. The deed should: (a) identify the trustees and the trust; (b) appoint the trust assets to the specified beneficiary (e.g. the surviving spouse); (c) be signed by ALL trustees; (d) be dated within two years of the death (for s.144 purposes); (3) RESOLVE THE LOAN NOTE/IOU (DEBT AND CHARGE SCHEMES): if the NRB trust was funded by a loan from the trustees to the surviving spouse (the 'debt and charge' mechanism), the loan is an asset of the trust and a liability of the surviving spouse's estate. When the trust is wound up, the loan must be: (a) assigned to the surviving spouse (so the spouse owes the debt to themselves — extinguishing it); or (b) released by the trustees by deed; (4) NOTIFY HMRC AND THE TRUST REGISTRATION SERVICE: once the trust is wound up: (a) submit a final trust tax return (SA900) to HMRC for the period to the date of winding up; (b) update the Trust Registration Service to record the trust as ceased; (5) DE-REGISTER FROM TRS: the TRS must be updated when the trust ceases. Register the closure on the HMRC trust registration portal — the trust will remain visible on TRS but marked as inactive; (6) TRANSFER LEGAL TITLE TO ASSETS: if the trust held land, a TR1 form (if registered) or conveyance (if unregistered) is required to transfer the legal title. If shares, a stock transfer form is required. Update each asset's title in the appropriate register; (7) TAKE PROFESSIONAL ADVICE: NRB trust wind-up involves IHT, CGT, and trust law interaction. Always take advice from a STEP-qualified solicitor or tax specialist before proceeding.