The decision facing a property-owning reader who is exploring trust-based estate planning is rarely "trust yes or no". It is "which of four vehicles, for which estate-planning goal, paying which entry tax on which axis". Most online content frames the choice as a binary trust-versus-FIC selection, losing two of the four routes that work better for specific landlord cohorts. This pillar maps the four real options across the three-tax stack that determines the cost of each.

The four vehicles are: an immediate-post-death interest (IPDI) created by will, which takes the TCGA 1992 s.62(1) death-uplift on the entry-side CGT and the IHTA 1984 s.49(1A) read-through on the IHT side; a lifetime discretionary settlement, which is a chargeable lifetime transfer (CLT) into the relevant property regime and unlocks TCGA 1992 s.260 holdover only where the trust is non-settlor-interested; a bare trust, fully transparent for CGT under TCGA 1992 s.60 with the gift treated as a PET starting the seven-year clock; and a Family Investment Company (FIC), corporate vehicle outside the trust regime entirely with the founder's share gift running its own seven-year PET clock. Each vehicle has its optimal cohort and its mismatched cohort; the framework below sets out where each wins and where each loses.

The three-tax stack runs across all four vehicles: IHT entry charge, CGT entry charge, and SDLT entry charge. The often-overlooked rule on the SDLT side is FA 2003 Schedule 4 paragraph 8, which treats assumed mortgage debt as chargeable consideration for SDLT regardless of whether any cash changes hands; this rule catches three of the four vehicles (the IPDI route is the only one that escapes, because death is not an SDLT event). Sessions across the Wave 6 B-cluster forward-link to this pillar for the four-vehicle framing.

The four vehicles at a glance

  • Vehicle 1: IPDI (Immediate Post-Death Interest) created by will. Created on the testator's death by the will-trust mechanism. IHTA 1984 s.49A and the s.49(1A) carve-out apply: the IIP holder (typically the surviving spouse) is treated under s.49(1) as beneficially entitled to the underlying property; the trust does NOT enter the relevant property regime. The s.18 spouse exemption applies on first death if the IPDI is for the spouse. CGT base cost resets under TCGA 1992 s.62(1) on the testator's death. No SDLT (death is not a chargeable event). Entry-side tax stack: nil/nil/nil for the typical spouse-IPDI scenario. Limitation: cannot solve any lifetime-planning problem; the testator must be the property owner at death.
  • Vehicle 2: Lifetime discretionary trust (CLT into relevant property regime). 20% lifetime IHT on the value above the settlor's available NRB. TCGA 1992 s.260 holdover available where the trust is non-settlor-interested (ss.169B to 169G); CGT deferred into trust base cost. SDLT on any assumed mortgage debt under FA 2003 Sch 4 para 8. Trust runs under the s.64 10-year periodic charge regime and s.65 exit charges. Trustee-governance vehicle; full discretion to distribute or accumulate. Optimal for landlords with substantial latent CGT gains who want trustee control and are willing to pay the entry IHT.
  • Vehicle 3: Bare trust (PET, full transparency). Transfer is a PET starting the seven-year clock. TCGA 1992 s.60 transparency: trustee's acts are treated as beneficiary's acts; the beneficiary is the direct owner for CGT and income tax. Property NOT in relevant property regime; no 10-year periodic charges, no exit charges. SDLT on assumed mortgage debt under FA 2003 Sch 4 para 8. CGT on entry is at market value under TCGA 1992 s.17 (no holdover, because no CLT). Optimal for minor-child gifts (PET clock running, trustees in legal control until age 18) and for small-portfolio scenarios where the simplicity is worth the entry CGT.
  • Vehicle 4: Family Investment Company (FIC). Corporate vehicle (limited company) holding the family's investment assets. Property transferred into the FIC at market value under TCGA 1992 s.17 (CGT entry charge; no s.260 holdover because no CLT). Founder's shares then gifted to children as PETs running the seven-year clock; share gifts are not "gifts of property" under FA 1986 s.102 (Ingram v IRC [1999] UKHL 47), so no GROB on the share gifts even where the founder remains involved as director. Income inside the FIC taxed at corporation tax main rate (25% for FY 2025/26 on profits above £250,000, marginal relief £50,000 to £250,000, 19% small-profits rate up to £50,000). Optimal for families wanting corporate-governance separation between control (director appointment) and beneficial ownership (share holding).

The three-tax stack as the decision spine

Every trust-route decision is the resultant of three independent tax decisions on the same property transfer: how much IHT bites on entry, how much CGT bites on entry, and how much SDLT bites on entry. Vehicles differ on each. The decision spine is mapping each vehicle's cost on each tax to identify which vehicle minimises total Year 0 cost for the specific family scenario.

IHT axis

For a £400,000 BTL transferred by a settlor with full unused NRB:

  • IPDI by will: nil at the lifetime gift point (no lifetime transfer happens; the IPDI is created on death). On death, the property is treated as the IIP holder's beneficially-held property under s.49(1) read-through; the s.18 spouse exemption applies if the IPDI is for the spouse. For first-death-into-IPDI scenarios, the IHT cost is effectively deferred to second death (when the surviving spouse dies and the property forms part of their estate).
  • Lifetime discretionary trust: 20% × (£400,000 minus £325,000) = £15,000 entry IHT, payable within six months of the end of the month of transfer. Trust then pays s.64 10-year periodic charges (up to 6% on the chargeable value above the available NRB at the periodic-charge date, formula-adjusted; typical figure £8,000 to £15,000 at year 10 on a £400,000 property growing to £530,000). Exit charges under s.65 on capital distributions to beneficiaries.
  • Bare trust: nil entry IHT (PET; the property is outside the relevant property regime). The PET starts the seven-year clock; if the settlor survives seven years, the property falls fully out of the estate. If the settlor dies within seven years, the PET fails and 40% IHT applies (with taper relief on years 3 to 7, per IHTA 1984 s.7(4): 32% at year 3 to 4, 24% at year 4 to 5, 16% at year 5 to 6, 8% at year 6 to 7).
  • FIC: nil entry IHT at FIC formation (the company formation is not a chargeable transfer). The founder's subsequent share gift to children is a PET running the seven-year clock; same taper schedule as bare trust on early death.

CGT axis

For the same £400,000 BTL with a £180,000 latent gain (base cost £220,000 after improvements):

  • IPDI by will: nil entry CGT. TCGA 1992 s.62(1) resets the base cost to MV at death (£400,000), eliminating the £180,000 latent gain entirely. This is the IPDI route's structural superpower on the CGT side; no other route delivers this on entry.
  • Lifetime discretionary trust: nil entry CGT IF the s.260 election is made and the trust is non-settlor-interested. The £180,000 gain is held over into the trust's base cost (trust takes the property at £220,000); settlor pays no immediate CGT. If the trust is settlor-interested, s.260 is blocked under s.169B(1), and the £180,000 gain crystallises at the 24% residential rate (less £3,000 AEA): £42,480 dry CGT charge, payable within 60 days via the residential property return.
  • Bare trust: £42,480 entry CGT (same calculation as the settlor-interested-trust scenario; no holdover available because no CLT trigger). Dry charge, payable within 60 days.
  • FIC: entry CGT depends on the property-into-company step. Transfer of the £400,000 BTL into the FIC at MV under s.17 generates the £42,480 charge in the founder's hands on the property transfer. The subsequent share gift is at the share value (often minority-discounted to £20,000 to £35,000 net of any CGT on the share-gift step, depending on the share class architecture). Combined CGT on the two-step entry can be £25,000 to £50,000.

SDLT axis (the assumed-debt trap)

FA 2003 Schedule 4 paragraph 8(1) is the load-bearing rule: "the amount of debt satisfied, released or assumed shall be taken to be the whole or, as the case may be, part of the chargeable consideration for the transaction." Where the trustees (or the FIC, in the case of the property-into-company step) assume the outstanding mortgage on the gifted property as part of the transfer, the assumed debt counts as chargeable consideration for SDLT, regardless of whether any cash changes hands. Paragraph 8(2) caps the consideration at market value if the assumed debt would otherwise exceed it.

For a £400,000 BTL with a £180,000 outstanding mortgage assumed by the trustees:

  • IPDI by will: nil SDLT. Transfers on death are not SDLT-chargeable events under FA 2003 s.42(2)(a). The mortgage is typically discharged from the estate or assumed by the beneficiary on death; neither is an SDLT trigger.
  • Lifetime discretionary trust: SDLT on the £180,000 assumed debt. Post-31-October-2024 additional-dwelling-surcharge rate at 5% applies (because the trustees are typically treated as a non-natural person purchaser of a residential dwelling): £180,000 × 5% = £9,000 approximate (band-adjusted; £125k at 5%, £55k at 7%, totalling roughly £9,000). If the mortgage is refinanced out of the settlor's name before the transfer, the SDLT bill is nil; this is the standard pre-transfer fix.
  • Bare trust: same as discretionary trust; £9,000 approximate if mortgage assumed; nil if refinanced out first.
  • FIC: SDLT on the entire £400,000 MV transfer into the company (5% additional dwelling rate; band-adjusted: £125k at 5%, £125k at 7%, £150k at 10%, totalling approximately £37,500), plus the £9,000 on assumed debt if mortgage moves. The combined SDLT cost on a property-into-FIC step is often the deciding factor against the FIC route for leveraged BTL portfolios; partnership-incorporation routes under FA 2003 Sch 15 para 10 can reduce this where the portfolio is genuinely held in a pre-existing letting partnership (but the conditions are strict; covered on our partnership-incorporation cluster).

Vehicle 1: IPDI created by will, the death-side route

The IPDI route uses the will as the trust-creation instrument. The testator's will leaves the property to a trust under terms that create an immediate-post-death interest (typically for the surviving spouse), with the underlying property passing to the children on the IPDI holder's later death. IHTA 1984 s.49A defines the IPDI as an interest in possession arising on the death of the settlor (testator). s.49(1A) carves the IPDI out of the post-22-March-2006 relevant property regime, applying the s.49(1) read-through that treats the IIP holder as beneficially entitled to the underlying property for IHT.

The structural advantages are three. First, no entry-side CGT (s.62(1) death-uplift resets the base cost). Second, no SDLT (transfers on death are not SDLT events). Third, s.18 spouse exemption on first death if the IPDI is for the spouse. The IPDI route delivers the cheapest entry-side tax stack of the four vehicles for property-already-in-the-estate cohorts.

The structural disadvantages are also three. First, it cannot solve any lifetime-planning problem; the testator must be the property owner at death (the route is a death-side route only). Second, the property is in the surviving spouse's death estate on second death (the s.49(1) read-through brings it back into estate accounting), so the estate-removal goal is deferred to second death rather than achieved on first. Third, the s.142 deed-of-variation flexibility (within two years of first death) is the standard tool for restructuring the IPDI into a discretionary trust after first death, but the variation has its own complications and election requirements (s.142 IHT election, s.62(6) CGT election).

For families with substantial property holdings and a planning horizon stretching into and across both spouses' lifetimes, an integrated IPDI-by-will-plus-deed-of-variation-on-first-death plan is often the cheapest total-cost structure; covered in depth on our Wave 4 C5 page on deeds of variation on landlord estates.

Vehicle 2: Lifetime discretionary trust, the strategic CGT-deferral route

The lifetime discretionary trust route is a CLT into the relevant property regime under IHTA 1984. The route's strategic value is the s.260 CGT holdover, which is conditional on the trust being non-settlor-interested per TCGA 1992 ss.169B to 169G. Where the trust is clean (settlor and spouse expressly excluded from the beneficiary class; covered in depth on our Wave 6 B4 page on the three-statute attribution stack), the route delivers £42,480 of CGT deferral on a typical £400,000 BTL with £180,000 latent gain in exchange for the £15,000 entry IHT cost; net Year 0 cost saving of £27,480 versus the bare-trust route or the FIC route.

The route's structural ongoing cost is the 10-year periodic charge under IHTA 1984 s.64 (up to 6% on the trust's chargeable value at each anniversary, formula-adjusted; typical figure £8,000 to £15,000 at year 10) plus exit charges on capital distributions under s.65. For a 30-year planning horizon, the total ongoing-charge cost is in the order of £40,000 to £70,000; against the £42,480 entry-side CGT saved plus the IHT removal value on the underlying property, the route typically still wins for substantial portfolios.

For the deep treatment of the discretionary trust mechanic with the Patel £400,000 worked example showing IHT, CGT, SDLT, and projected year-10 cost, see our existing Wave 4 C10 pillar on the CLT discretionary trust mechanic. For the settlor-interested trap that breaks the s.260 holdover, see our Wave 6 B4 page on the three-statute attribution stack. For the GROB-overlay that produces a double-trap, see our Wave 6 B7 page on the settlor-interest plus GROB interaction.

Vehicle 3: Bare trust, the transparent PET route

The bare trust mechanism is fundamentally different from the discretionary and IIP routes. TCGA 1992 s.60(1) treats the trustee's acts in relation to the property as the acts of the beneficiary; transactions between the trustee and beneficiary are disregarded. The beneficiary is the direct owner for CGT purposes from the trust's creation. For income tax, the same transparency applies: rental income is taxed on the beneficiary at their marginal rate.

For IHT, the transfer into bare trust is a PET. The property is NOT in the relevant property regime; no 10-year periodic charges, no exit charges; the beneficiary is treated as the absolute owner from the gift date. The PET starts the seven-year clock from gift; if the settlor survives seven years, the property falls fully out of the estate at the gift-date value (not the death-date value); if the settlor dies within seven years, the PET fails and 40% IHT applies with taper relief on years 3 to 7.

The route's structural strengths are simplicity (no separate trust entity for tax purposes), transparency (single tax return on the beneficiary's marginal rate), and PET-clock running from gift date. The structural weaknesses are the entry-side CGT (no holdover; £42,480 on the £180,000-latent-gain example), the dependence on the settlor's survival for the PET clock, and the loss of trustee discretion over future distributions (the beneficiary can demand the property at any time once of age).

For minor-child gifts the bare trust route is structurally dominant: the trustees retain legal control until the child reaches 18 (or whatever age the trust deed specifies for transfer of legal title), while the IHT PET clock runs from the gift date and the IHT-side benefits accrue. Covered in depth on our forthcoming Wave 6 B6 page on bare trust vs nominee company vs formal trust, and our Wave 6 B9 page on gifting property to minor children.

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Vehicle 4: Family Investment Company, the corporate alternative

The FIC route uses a limited company as the holding vehicle. Property is transferred into the FIC at market value under TCGA 1992 s.17 (CGT entry charge bites; no s.260 holdover available because no CLT trigger), the founder takes management shares with full director-control rights, and growth shares are gifted to the next generation as PETs. The share gifts are not "gifts of property" for FA 1986 s.102 GROB purposes (Ingram v IRC [1999] UKHL 47), so the founder can continue to direct the company through their director role without triggering GROB on the share gift.

Income inside the FIC is taxed at the corporation tax main rate (25% for FY 2025/26 on profits above £250,000, marginal relief £50,000 to £250,000, 19% small-profits rate up to £50,000). The founder may receive director's salary (subject to PAYE and the wholly-and-exclusively test on the FIC's CT deduction), dividends (subject to dividend tax), or rent (where the FIC leases the property back, with full market terms and the FIC paying CT on the rent receipts).

The route wins where corporate governance separation and director-level remuneration are valued; loses where the latent CGT gain is substantial (the entry-side CGT bites without holdover) or where the SDLT-on-property-into-company step (5% additional-dwelling rate on the full MV) is prohibitive on leveraged BTL portfolios. For the deep tax-side comparison against the lifetime discretionary trust on six axes (entry IHT, ongoing tax rate, CGT entry, setup cost, control, distribution flexibility), see our existing pillar at FIC vs Discretionary Trust for Property.

The decision matrix: which vehicle wins for which cohort

No single vehicle dominates all use cases. The matrix below summarises which vehicle is structurally the strongest first option for each common cohort:

  • Property already in the estate; substantial value; family includes spouse + children: IPDI by will, with deed-of-variation flexibility on first death. Cheapest entry-side tax stack (nil/nil/nil) and lets the family retro-engineer the right structure with full information.
  • Mid-life landlord; single BTL or small portfolio; substantial latent CGT gain; spouse and adult children: Lifetime discretionary trust with clean (non-settlor-interested) drafting and pre-transfer mortgage refinance. £15,000 entry IHT in exchange for £42,000-plus of CGT deferral; trustee governance for multi-generational planning.
  • Parent wanting to gift property to a minor child: Bare trust. PET clock runs from gift, trustees retain legal control until age 18, no relevant property regime exposure, no entry IHT. Income-tax attribution under s.629 applies but is unavoidable on any parent-to-minor-child route.
  • Family wanting corporate-governance separation between control and beneficial ownership; mid-portfolio scale; founder wanting director remuneration: FIC. Avoids the trust regime entirely; growth-share architecture preserves founder control while gifting value to next generation.
  • Elderly landlord in failing health; large portfolio: Lifetime discretionary trust (immediate removal from estate; no 7-year clock on the property itself, just the £15,000 entry IHT paid upfront) plus IPDI-by-will on remaining direct-ownership assets. Combined route handles both the lifetime-removal goal and the property-already-in-estate goal.
  • Family with offshore-resident members or non-UK-domiciled history: Specialist advice required. The post-FA-2025 long-term-resident regime under IHTA 1984 s.48ZA (replacing the omitted s.48(3)-(3F)) governs excluded-property status of non-UK-situated assets in offshore trusts; the four-vehicle framework above is the UK-resident-settlor baseline and may need substantial adjustment for cross-border cases.

The five most common drafting mistakes across the cluster

Five mistakes account for most of the value lost in real-world property-trust planning. They cluster on the entry-side tax stack and on the drafting precision required to avoid the various anti-avoidance regimes.

  1. Settlor-interested drafting on a discretionary trust. Including the settlor or settlor's spouse in the beneficiary class breaks the s.260 holdover under TCGA 1992 s.169B, triggers s.624 income-tax attribution, and (if the deed creates an IIP for the settlor or spouse) brings the s.49(1A) read-through into play. The fix is express exclusion in the deed. See our Wave 6 B4 page on the three-statute attribution stack for the depth treatment.
  2. Gift-with-reservation on top of any property gift. The donor continues to occupy or take rents from the gifted property, triggering FA 1986 s.102, with the property added back to the death estate at MV at death. HMRC's IHTM42254 published view: mere membership in a discretionary beneficiary class is reservation of benefit. See our Wave 6 B7 page on the settlor-interest plus GROB double-trap.
  3. Failing to refinance the mortgage out before the transfer. Leaving the mortgage in place and having the trustees assume it triggers FA 2003 Sch 4 para 8 SDLT on the assumed debt; £9,000-plus on a typical £180,000-mortgaged BTL. The fix is pre-transfer refinance into the settlor's personal name; transfer of clean unmortgaged title to trustees; no SDLT bill.
  4. Misclassifying the trust type. Drafting what was intended as a bare trust but with discretionary-class language, accidentally creating a discretionary trust subject to entry IHT and the relevant property regime. The fix is precision in the deed wording and using model deeds from a trust-tax specialist rather than family-friend solicitor templates.
  5. Not coordinating lifetime structure with the will. A lifetime discretionary trust plus a will that creates an IPDI for the surviving spouse on the same property can produce conflicting IHT-add-back consequences (the s.49(1A) read-through on the IPDI may interact unhelpfully with any reservation-of-benefit analysis on the lifetime trust). The fix is integrated estate-planning where the lifetime structure and the will are designed together as a single plan.

This pillar is the four-vehicle decision spine; the deep pages each treat one vehicle or one anti-avoidance regime in depth: