The settlements legislation at ITTOIA 2005 Part 5 Chapter 5 is the income-tax anti-avoidance code that catches arrangements designed to shift rental income from a higher-rate landlord to a lower-rate family member. The single point that defines the entire code is the s.620 definition of "settlement": verbatim text reads "any disposition, trust, covenant, agreement, arrangement or transfer of assets" (with one carve-out for charitable loan arrangements). The width is deliberate. There is no requirement for a formal trust deed; an informal family understanding can be a "settlement" for s.624 purposes, and the case law confirms it.

The rest of the chapter elaborates the consequence. s.624 attributes income arising under the settlement back to the settlor where the settlor retains an interest. s.625 defines retained interest broadly (any circumstances in which the property is or may become payable to or applicable for the benefit of the settlor or spouse). The three carve-outs at ss.626 to 628 are narrow. s.629 is a separate statutory mechanism for minor-child distributions with a £100 per-settlement de-minimis. s.631 closes the obvious accumulate-then-distribute-at-18 avoidance route.

This page walks the architecture section by section with verbatim statutory wording verified against legislation.gov.uk at write time. It addresses the most common conceptual error in landlord planning (conflating s.624 settlor-with-interest with s.629 minor-child attribution as a single rule; they are independent triggers and a single arrangement can engage one, the other, both, or neither). And it sets out three worked attribution scenarios in property context: a bare trust for a minor child, a declaration of trust to an adult child living rent-free, and a grandparent-route bypass that delivers the income to the grandchild at a substantially better marginal rate.

The architecture of Part 5 Chapter 5 in one paragraph

s.620 defines settlement and settlor. s.624 attributes income from settled property where the settlor retains an interest (with s.625 defining "retained interest" widely). The three carve-outs at ss.626 (outright gifts between spouses), 627 (separation/commercial/pension), and 628 (charities) restrict the s.624 net. s.629 is a separate attribution rule for minor-child distributions, with the £100 de-minimis at s.629(3). s.631 backstops s.629 against accumulate-and-distribute-at-18 arrangements. The chapter operates independently of the CGT-side anti-avoidance at TCGA 1992 s.169B (settlor-interested holdover block, covered on our Wave 6 B4 page) and the IHT-side carve-out at IHTA 1984 s.49(1A) (IPDI read-through, also covered on our B4 page). Income tax, CGT, and IHT each have their own statutory hook for settlor-interested arrangements; sessions that conflate them mislead readers.

s.620: the deliberately broad definition

s.620(1) verbatim: "settlement" includes any disposition, trust, covenant, agreement, arrangement or transfer of assets (except that it does not include a charitable loan arrangement). s.620(5) defines charitable loan arrangements as loans of money made by individuals to charities for no consideration or for consideration consisting only of interest.

The width is the entire point. The legislation predates many of the family-tax-planning structures it now catches and was drafted (in its pre-2005-rewrite form) to give HMRC the widest possible reach. The case law has confirmed the literal reading: Crossland v Hawkins [1961] 1 Ch 537 held that a commercial arrangement between an actor's company and the actor's family was a settlement; Copeman v Coleman [1939] 22 TC 594 held that a salary arrangement could be a settlement; Jones v Garnett (the Arctic Systems case) [2007] UKHL 35 confirmed that a share gift from husband to wife was a settlement (although outside the s.624 attribution by force of s.626 because the conditions were met).

For property cases, any arrangement to share rental income or capital with a family member at less than market value is potentially within s.620. A declaration of trust over a beneficial share, a deed of gift of legal title, an informal agreement to direct rents to a family member, a covenant to pay a fixed share of profits: all can be settlements. The threshold question is whether there is the necessary element of "bounty" (a transfer of value made gratuitously or at undervalue); arms-length commercial dealings between unconnected parties are usually outside the section.

s.624 and s.625: settlor-with-interest attribution

s.624(1) verbatim: "Income which arises under a settlement is treated for income tax purposes as the income of the settlor and of the settlor alone if it arises (a) during the life of the settlor, and (b) from property in which the settlor has an interest." Subsection (1A) provides that trustee expenses cannot be used to reduce the attributed income. Subsection (3) cross-refers to the carve-outs at ss.626 to 628.

The retained-interest test is at s.625. s.625(1) verbatim: a settlor has an interest in property if there are "any circumstances in which the property or any related property (a) is payable to the settlor or the settlor's spouse or civil partner, (b) is applicable for the benefit of the settlor or the settlor's spouse or civil partner, or (c) will, or may, become so payable or applicable." Spouse / civil partner is treated as an extension of the settlor for the retained-interest test. "Related property" at s.625(5) means income from that property or any other property representing proceeds of, or income from, that property.

The "in any circumstances" formulation is the test's load-bearing language. A discretionary trust where the trustees have power to benefit the settlor, even on the most circumscribed contingency, is caught. A trust where the settlor's spouse is in the beneficiary class is caught (the spouse is treated as the settlor for the test). A trust where value can route back to the settlor by any indirect mechanism (a side letter, a pattern of trustee behaviour, an informal expectation) is caught under s.625 read with the s.169G "arrangement" definition for the parallel CGT-side test.

The mechanic for landlord pages: rental income from a BTL property settled on a trust where the settlor or settlor's spouse is in the beneficiary class is taxed on the settlor at the settlor's marginal rate, regardless of who the named beneficiaries are or how the trustees actually distribute the income. The income is treated as the settlor's for income tax; the trustees may still hold the cash; the income-tax liability sits on the settlor. The named beneficiary's tax position on any actual distribution is unaffected by the attribution (no double taxation), but the settlor cannot reclaim the tax paid out of any future trust distribution.

s.626: the Arctic Systems spouse carve-out

s.626(1) carves out from s.624 attribution any "outright gift" of income-producing property between spouses or civil partners, subject to two conditions:

  • Condition A: the gift carries a right to the whole of the income. The donee must receive all the income arising from the gifted property, not a fixed sum or a fraction. A gift of an ordinary share with full dividend rights meets Condition A; a gift of a preference share with a frozen dividend right does not (the dividend is capped, not "the whole of the income").
  • Condition B: the property is not wholly or substantially a right to income. The gift must include a meaningful capital interest, not just an income stream. A gift of an ordinary share carrying both dividend rights and capital rights meets Condition B; a gift of just a right to receive future dividends without any capital entitlement does not.

The Conditions A and B test was the centre of the Arctic Systems case (Jones v Garnett [2007] UKHL 35). Mr Jones gifted ordinary shares in his contracting company to his wife; HMRC argued the gift was within s.624 because the dividends she received were really his income for services rendered. The House of Lords held that the s.626 carve-out applied: the ordinary shares carried the right to whole income (Condition A) and were not wholly or substantially a right to income because they carried capital rights as well (Condition B). The outright-gift mechanic placed the dividends outside the s.624 net.

For property cases, a gift of an undivided share of legal title in a BTL between spouses (under a clean declaration of trust with no donor-benefit reservation) typically meets both conditions: the donee receives their share of the rental income (Condition A); the gift includes their share of capital ownership (Condition B). Form 17 elections by joint owners to split income unequally to match unequal beneficial shares can engage the same statutory framework; the s.626 carve-out usually applies if the gift creating the beneficial-share imbalance was a clean outright gift. See our Wave 5 Form 17 cluster for the operational detail.

s.627: separation, commercial, pension carve-outs

s.627 carves out four sub-categories of income from s.624 attribution: (a) income payable to a former spouse or civil partner under a separation or divorce provision; (b) annual payments made by an individual for commercial reasons in connection with a trade, profession, or vocation; (c) qualifying gift-aid donations; (d) benefits under a relevant pension scheme. The carve-outs are mostly outside typical landlord planning but the separation/divorce carve-out matters where rental property is settled in connection with a divorce settlement (the income from the settled property is taxed on the receiving ex-spouse, not the settlor, by force of s.627(a) rather than by the s.626 spouse carve-out which only applies to current spouses).

s.628: the charities exception (NOT a 5% rule)

s.628 carves out from s.624 attribution qualifying income arising under a UK settlement where the income is given to charity in the tax year of arising, or where a charity is entitled to the income under the trust terms. The carve-out is mechanical and applies to the charity-bound income only; non-charity income from the same settlement remains within s.624.

There is no 5% threshold in s.628. The persistent misreading in older blog content (treating s.628 as a 5%-de-minimis on settlor-attribution generally) is wrong. Sessions across the property-trust cluster must be precise: s.628 is the charities exception, with no numerical threshold; the £100 figure that does exist in the settlements legislation is at s.629(3) and is a different mechanism (per-settlement annual de-minimis on minor-child distributions). The two should never be conflated.

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s.629: minor-child attribution (the separate mechanism)

s.629 is a structurally separate attribution rule for distributions from a settlement to a minor unmarried child of the settlor. Verbatim s.629(1): "Income which arises under a settlement is treated for income tax purposes as the income of the settlor and of the settlor alone for a tax year if, in that year and during the life of the settlor, it (a) is paid to, or for the benefit of, a relevant child of the settlor, or (b) would otherwise be treated (apart from this section) as income of a relevant child of the settlor."

Subsection (2) deconflicts with s.624: the attribution is one or the other, not both. Where both sections potentially apply, s.624 takes precedence (i.e. if the settlor has a retained interest under s.625, s.624 attributes; s.629 then has nothing to attribute). For pure parent-to-minor-child gift structures where the settlor has no retained interest (the classic bare-trust-for-minor-child case), s.624 does not apply and s.629 is the operative attribution rule.

Subsection (3) is the £100 per-settlement de-minimis: the section does not apply where the relevant settlement income paid to or for the relevant child in the tax year does not exceed £100. The figure has not been uprated since the section was first enacted; HMRC's TSEM4300 manual confirms the literal £100. For property cases, the de-minimis is structurally too small to be useful: a £200,000 BTL share generating £6,000 of net rent for a minor child blasts past the £100 threshold and the full £6,000 is attributed.

Subsection (7)(d) defines "relevant child" as a minor child of the settlor who is unmarried or not in a civil partnership. The cliff-edge is the child's 18th birthday: from that date prospectively, s.629 ceases to apply (the child is no longer a "relevant child" because no longer a minor). Income arising after the 18th birthday is taxed in the (now-adult) child's hands at the child's marginal rate. The cliff is prospective only; there is no retrospective re-attribution to the parent of income that was attributed during the minor years.

s.631: retained and accumulated income (anti-bunching backstop)

s.631 closes the obvious avoidance route of accumulating settlement income inside the trust during the child's minor years (avoiding s.629(1) attribution on those years because no distribution is made), then distributing the accumulated capital to the child after age 18 (when s.629 has ceased to apply prospectively). The mechanic: where trustees retain or accumulate settlement income and later make a payment to a relevant child, the payment is treated as a distribution under s.629(1) to the extent of retained-or-accumulated income available.

The retained-or-accumulated-income figure is computed cumulatively across the trust's life, less amounts already treated as settlor income, already paid to other beneficiaries, or applied to trustee expenses properly chargeable to income. So a trust that accumulates £15,000 over three years and distributes £20,000 at the child's 19th birthday has £15,000 of the £20,000 treated as a s.629 distribution attributable to the parent-settlor in the year of the £20,000 distribution. The mechanism preserves the s.629 attribution effectively for the trust's full life regardless of distribution timing.

The s.631 backstop is the structural reason the parent-to-minor-child trust route does not deliver income-tax savings even with sophisticated accumulation strategies. The income-tax outcome is the same whether the trust pays out annually (s.629(1) attributes annually) or accumulates and pays out later (s.631 catches the accumulated income on payment). For income-tax purposes, the parent-to-minor-child trust route is genuinely equivalent to direct retention by the parent; the route's value is on the IHT (7-year PET clock) and CGT (base-cost roll-up in child's hands) sides only.

Three worked attribution scenarios in property context

Scenario 1: Patel bare trust for minor child (s.629 bites)

Mr Patel, age 45, higher-rate taxpayer (marginal income tax rate 40%), gifts a 25% beneficial share of a £400,000 BTL property (gift value £100,000) to his 12-year-old daughter via a clean bare-trust declaration. The bare trustee is Mr Patel's brother (his daughter's uncle). The BTL generates £24,000 of net rental income per year (after allowable expenses, before any finance costs; assume unmortgaged). The daughter's 25% share of net rental income is £6,000 per year.

  • s.620 width: the bare-trust declaration is a "transfer of assets" within the s.620 definition. The arrangement is a settlement.
  • s.624 attribution: Mr Patel has no retained interest in the gifted share (TCGA 1992 s.60 transparency places the daughter as the direct CGT owner from the gift date; the property is hers for trust purposes; the bare trustee holds legal title but cannot benefit Mr Patel). s.624 does not attribute.
  • s.629 attribution: the £6,000 of rental income is paid to (or treated as paid to) the daughter, who is a minor unmarried child of Mr Patel ("relevant child" under s.629(7)(d)). s.629(1) attributes the full £6,000 to Mr Patel. The £100 de-minimis at s.629(3) is exceeded. Mr Patel reports the £6,000 on his self-assessment as attributed settlement income; tax at 40% = £2,400 per year.
  • Outcome: identical income-tax outcome to direct retention of the BTL share by Mr Patel. IHT benefit (PET starts 7-year clock from gift date) and CGT benefit (gain held over into daughter's base cost? No: bare trust does not unlock s.260 holdover because no CLT trigger; the gift triggers a s.17 deemed-MV disposal with CGT bite on the £100,000 share value at residential rates) remain in play. Net of the entry-side CGT cost, the bare-trust route delivers IHT benefit (after 7 years) but no income-tax benefit at all.

Scenario 2: Khan declaration of trust to adult child living rent-free

Mrs Khan, age 60, has moved out of her former family home (a £350,000 property in good condition). Her 28-year-old daughter has been renting elsewhere and would benefit from the property as her main residence. Mrs Khan declares a clean trust over the property in favour of the daughter; the daughter moves in as her principal private residence.

  • s.620 width: the declaration of trust is a "transfer of assets" within the s.620 definition. The arrangement is a settlement.
  • s.624 attribution: Mrs Khan has no retained interest (clean outright gift; daughter is the direct beneficial owner). s.624 does not attribute. Even if s.624 did apply, there is no rental income to attribute (the daughter occupies as her PPR and pays no rent).
  • s.629 attribution: the daughter is 28, not a minor; she is not a "relevant child" under s.629(7)(d). s.629 does not apply.
  • Outcome: the arrangement is outside the settlements legislation entirely. The CGT-side analysis is separate: Mrs Khan triggers a TCGA 1992 s.17 deemed-MV disposal at the date of the declaration; latent gain crystallises (no holdover because no CLT trigger and no business-asset element). The IHT-side analysis: PET starting 7-year clock. The income-tax-side analysis: clean (the daughter occupies as PPR, no rental income to attribute). The arrangement is structurally cheap on income tax but expensive on entry-side CGT.

Scenario 3: Williams grandparent-route bypass

Mr Williams (age 42, higher-rate taxpayer at 40% marginal rate) wants to fund his 8-year-old son's school fees and future university costs. His father (the grandfather, age 72, retired, basic-rate taxpayer with £8,000 of unused personal allowance after his state pension and small workplace pension) is willing to act as the funding mechanism.

The grandfather settles £100,000 of cash on bare trust for his grandson, with the grandfather's daughter (the grandson's aunt) as bare trustee. The trustees invest the cash in a BTL property worth £100,000 (a single-bedroom flat in a regional city). The flat generates £6,000 of net rental income per year.

  • s.620 width: the settlement of cash on trust is a clear "transfer of assets". Settlement exists.
  • s.624 attribution: the grandfather has no retained interest. s.624 does not attribute.
  • s.629 attribution: the £6,000 of rental income is treated as paid to (or for the benefit of) the grandson, who is a minor unmarried child of the GRANDFATHER (not of Mr Williams). s.629(1) attributes the income to the grandfather (the settlor of the trust), NOT to Mr Williams. The grandfather is "the settlor" for s.629 purposes because he made the settlement.
  • Tax outcome: the grandfather receives the £6,000 as attributed settlement income. His total income for the year before attribution is, say, £12,000 (state pension + workplace pension), with £570 of personal allowance already used. He has £12,000 of personal allowance remaining (£12,570 standard 2026/27 less £570 used = £12,000 effective). The £6,000 attributed sits entirely within his unused personal allowance: zero income tax. Annual saving versus the parent-route alternative (where Mr Williams would have funded the £6,000 of school costs out of his own £6,000 of post-tax income, requiring £10,000 of pre-tax higher-rate earnings): £4,000 of effective income-tax saving per year.
  • Outcome: the grandparent-route bypass delivers genuine income-tax savings within the statutory architecture. The structure is fully compliant; HMRC accepts the grandparent-route position in TSEM4300 onwards. The mechanism works because the s.629 settlor identity drives the attribution to a more favourable marginal rate.

Where this fits in the wider Wave 6 trusts cluster

B2 is the income-tax-side statutory walkthrough. Three companion pages address related angles on the same anti-avoidance architecture:

For the CGT-side companion analysis of settlor-interested trusts (TCGA 1992 s.169B blocking s.260 and s.165 holdover), see B4. For the wider landlord IHT decision frame, see An IHT Decision Framework for UK Landlords.