Discretionary Trusts vs Fixed Interest Trusts: How Spain Taxes Each Type Differently

The distinction between a discretionary trust and a fixed interest trust is one of the most fundamental in Anglo-Saxon trust law. In the context of Spanish taxation, however, this distinction carries profound practical consequences that go far beyond mere structural classification. It determines which legal arguments are available to the taxpayer, what reporting obligations arise under Modelo 720, and how the Spanish tax authorities (AEAT) are likely to characterise both the underlying assets and any distributions received. For any Spanish tax resident who is a settlor, trustee, or beneficiary of a UK or other common law trust, understanding this difference — and its consequences — is essential.

The Fundamental Distinction: Vested Right vs. Mere Expectation

Under English law, a fixed interest trust — sometimes called an interest in possession trust — is one in which one or more beneficiaries hold a present, immediate, and automatic right to the income of the trust as it arises. The life tenant (the beneficiary of a fixed interest) has an enforceable right: they can compel the trustee to pay them the income to which they are entitled, and the trustee is under a legal obligation to do so. The life tenant does not, however, have rights over the capital of the trust, which passes to the remaindermen on the termination of the interest.

A discretionary trust, by contrast, is one in which the trustee has full discretion to decide which members of a defined class of beneficiaries will receive distributions of income or capital, in what amounts, and at what times. A discretionary beneficiary has no current right over any trust asset or income; they hold only an expectation, a hope of receiving distributions, but nothing legally enforceable. The trustee may, quite legitimately, distribute nothing to a particular beneficiary throughout the entire life of the trust.

Between these two categories lie various hybrid structures. A trust may be discretionary as to capital but grant a fixed right to income. It may be accumulation and maintenance during an initial period before converting to a fixed interest once beneficiaries reach a specified age. It may give the trustee only a limited discretion over income, constrained by an obligation to maintain a beneficiary at a certain standard of living. Each variant presents its own set of Spanish tax questions.

DGT Binding Consultations: The Administrative Position

The Dirección General de Tributos (DGT) — Spain's tax ruling authority — has addressed trust taxation in a series of binding consultations (consultas vinculantes) issued under Article 89 of the General Tax Law (Ley 58/2003). These rulings bind the AEAT's inspection officers when dealing with taxpayers in identical circumstances, though they do not bind the taxpayers themselves.

Three consultations are particularly relevant to the discretionary vs. fixed interest distinction:

Binding Consultation early DGT rulings (2008–2010) addressed the treatment of a UK discretionary trust whose settlor was alive and resident in Spain. The DGT held that the trust should be "disregarded" for Spanish tax purposes: the settlor, as the person who had transferred the assets, should continue to be treated as their owner for IRPF and Wealth Tax purposes. Any distribution made by the trustee to a beneficiary was to be characterised as a gift from the settlor to the beneficiary, subject to Inheritance and Gift Tax (ISD) in its inter vivos mode.

Binding Consultation DGT criteria established by 2016 developed this doctrine further, distinguishing between revocable and irrevocable trusts. For a revocable trust, the settlor retains effective control and is therefore taxed as owner. For an irrevocable trust where the settlor has been excluded as beneficiary and genuinely lacks control, the DGT's analysis becomes more complex — the consultation acknowledged that attributing assets to the settlor in those circumstances required stronger justification, though it did not depart from the general rule.

Binding Consultation DGT criteria established by 2017 remains the most important ruling on trust characterisation to date. It confirmed that where a Spanish resident is a beneficiary of a foreign trust and the settlor has died, the beneficiary must declare the trust assets as their own in Modelo 720 and include them in their Wealth Tax return. Distributions received following the settlor's death are taxed as inheritance (ISD in its succession mode) rather than as income, with the taxable event occurring at the moment of the settlor's death.

How Spain Taxes the Fixed Interest Trust

For a Spanish tax resident who is the life tenant of a fixed interest trust, Spain's look-through approach has direct and ongoing consequences. Because the beneficiary holds an enforceable, present right to income, Spanish tax law treats that right as analogous — however imperfectly — to direct ownership of a beneficial interest in the underlying assets.

IRPF: Annual Taxation on Trust Income

The principal consequence for the fixed interest beneficiary is that they are expected to declare, in their annual Spanish income tax return (IRPF — Impuesto sobre la Renta de las Personas Físicas), the income generated by the trust assets as if they owned those assets directly. This applies whether or not the trustee has actually distributed that income. If the trust holds a portfolio of listed securities generating dividends and interest, the life tenant must declare those dividends and interest in the same way they would declare dividends from directly held shares — in the savings income base (base imponible del ahorro), currently taxed at rates between 19% and 30%.

The key issue for the fixed interest trust is that this is an annual obligation: it arises in each fiscal year regardless of distributions received. The life tenant cannot defer Spanish IRPF by simply asking the trustee not to distribute. The income is imputed in the year it accrues at trust level.

ISD: The Inheritance Tax Dimension

When the settlor of a fixed interest trust dies and the life tenant's right arises (or was already held), this triggers a Spanish Inheritance and Gift Tax (ISD) event for any beneficiary who is a Spanish tax resident. The taxable base is the value of the life interest — calculated using Spain's own valuation rules for life interests, which apply the formula (89 minus the beneficiary's age), capped between 10% and 70%, multiplied by the full asset value. A 55-year-old beneficiary would therefore have a life interest valued at 34% of the underlying trust fund.

The ISD rate depends on the autonomous community where the beneficiary is resident. Andalucía offers a 99% bonus on close-family inheritances. Madrid similarly offers very significant reductions. By contrast, some other regions apply progressive rates that can reach 20–34% on larger inheritances with more distant relatives.

Modelo 720: Reporting the Fixed Interest

For Modelo 720 purposes (the overseas asset declaration), the AEAT's FAQ document distinguishes between "real and effective beneficiaries" who must report, and "potential beneficiaries" who do not. A fixed interest beneficiary falls squarely in the first category: their right is current and enforceable. They must therefore report the trust assets in Modelo 720 categorised by type — bank accounts under Block 1, securities and investments under Block 2, real estate under Block 3 — using the appropriate valuation for each. The reporting threshold is €50,000 per category.

How Spain Taxes the Discretionary Trust

The discretionary trust presents a markedly different — and in many ways more complex — picture for the Spanish tax resident involved.

The Settlor While Alive: IRPF Attribution

Where the settlor of a discretionary trust is alive and is a Spanish tax resident, the DGT's position is that the entire trust fund is attributed to the settlor for both IRPF and Wealth Tax. This applies even where the trust is irrevocable and even where the settlor has been formally excluded as a beneficiary. The DGT's justification — that Spain does not recognise the separation of legal and equitable title — has been criticised in academic commentary as a non-sequitur: the fact that Spain does not have trust law does not automatically mean a foreign trust's effects must be denied. Nevertheless, this remains the administrative position, and AEAT inspectors follow it.

One important nuance: where the settlor is resident in Spain and the trust is revocable, the attribution to the settlor is particularly defensible — the settlor retains real economic control and taxing them as owner reflects economic substance. Where the trust is genuinely irrevocable and the settlor has been excluded from benefit, there are stronger arguments for departing from the DGT position, though doing so carries inspection risk.

After the Settlor's Death: The Distribution as Gift Argument

Following the settlor's death, the DGT's framework for discretionary trusts diverges from its approach to fixed interest trusts in an important way. For the discretionary beneficiary, there is no vested entitlement at the moment of the settlor's death — unlike the fixed interest beneficiary who acquires (or confirms) a definite right at that point. The DGT position is therefore that discretionary beneficiaries are not immediately taxed on the settlor's death; instead, each distribution made by the trustee to a discretionary beneficiary is taxed as a gift (ISD, inter vivos mode) at the time of receipt.

This creates a potentially significant planning opportunity: where a discretionary trust is genuinely discretionary and distributions are not automatic, Spanish ISD on the trust fund may be deferred until distributions are actually made. The trust fund can theoretically grow during the accumulation period without triggering annual Spanish inheritance tax, unlike a fixed interest trust where the valuation event occurs at the settlor's death.

The "Fictitious Gift" Problem

The DGT's characterisation of trustee distributions as gifts from the settlor raises a conceptual difficulty: a gift requires the donor's consent (animus donandi), which is hard to reconcile with an irrevocable trust where the settlor has no control over the trustee's distribution decisions. The DGT has not resolved this tension satisfactorily. In practice, distributions from discretionary trusts are reported as ISD inter vivos events, with the "donor" treated as the settlor (if alive) or the trust estate (if the settlor has died).

IRPF on Discretionary Distributions

Where the DGT treats a discretionary distribution as a gift for ISD purposes, there is generally no additional IRPF on the same distribution — the ISD and IRPF do not overlap on the same enrichment. However, where the trust generates income that is not distributed (accumulated income), and the DGT's framework treats that income as imputable to the settlor or beneficiaries, a question arises about the basis for allocation: with no fixed entitlement, it is unclear which beneficiary should declare which proportion of the accumulated income. The DGT has not issued clear guidance on this allocation problem for discretionary trusts.

Comparison Table: Discretionary vs. Fixed Interest in Spain

UK Trust Specifics in the Spanish Tax Framework

UK common law trusts are the most frequently encountered foreign trusts in Spanish tax practice, partly because of the large community of British nationals resident in Spain and partly because the UK has one of the world's most sophisticated trust industries. Several features of UK trust law are particularly relevant when analysing Spanish tax consequences.

UK Bare Trusts

A bare trust under English law is one where the trustee holds assets for a single adult beneficiary absolutely — the beneficiary is entitled to demand transfer of the legal title at any time and has full beneficial ownership. Spanish tax analysis of a bare trust is straightforward: the beneficiary is treated as the owner of the assets, both for IRPF and for Wealth Tax. There is no material distinction between a bare trust and direct ownership from a Spanish tax perspective.

UK Interest in Possession Trusts Post-IHTA 2006

The UK Finance Act 2006 fundamentally changed the Inheritance Tax treatment of interest in possession trusts created after March 2006 for UK purposes. However, this UK-internal change has no direct bearing on Spanish tax analysis, which is determined by Spanish law principles applied to the facts — specifically, whether the beneficiary holds a present and enforceable right to income. A post-2006 UK interest in possession trust is still treated as a fixed interest trust for Spanish tax purposes if its terms give the life tenant a current entitlement to income.

Spain-UK Double Tax Treaty

The Spain-UK Double Tax Treaty (1975, as updated) does not contain specific provisions addressing trusts as entities. Where a UK trust generates dividend income from UK companies, the beneficial owner concept in Article 10 becomes relevant: can the fixed interest beneficiary claim the reduced 15% withholding rate as "beneficial owner" of the dividends? The DGT has not issued a binding consultation specifically on this point, but the prevailing view is that a life tenant — with their current entitlement to income — is more likely to qualify as beneficial owner than a discretionary beneficiary who holds no present right.

Modelo 720 Differences Between Trust Types

The different Modelo 720 treatment of fixed interest vs. discretionary trust beneficiaries deserves elaboration, as it is one of the most practically significant distinctions in day-to-day compliance.

The AEAT's FAQ document (Question 52) draws a clear line between beneficiaries who have "real and effective" rights over trust assets, who must declare, and "potential beneficiaries" who need not. This distinction maps directly onto the fixed interest / discretionary divide:

• Fixed interest (life tenant): The right to income is current, quantifiable, and legally enforceable. The AEAT regards this beneficiary as having real and effective rights → mandatory Modelo 720 filing, reporting the underlying trust assets by category.
• Pure discretionary beneficiary: No current right exists; the trustee may never exercise discretion in favour of this beneficiary. The AEAT acknowledges this beneficiary may be a "mere potential beneficiary" → no mandatory Modelo 720 filing in respect of trust assets.

However, the discretionary exemption is not automatic. If in practice the trustee distributes regularly and predictably to a specific beneficiary, the AEAT may conclude that the beneficiary is "real and effective" regardless of the formal discretionary label. Substance matters: a trust described as discretionary but which distributes the same amount to the same beneficiary every year functions economically as a fixed interest trust and may be treated as such by Spanish inspectors.

For the settlor of a discretionary trust who is alive and resident in Spain, the Modelo 720 obligation is unambiguous: the DGT treats the settlor as owner of all trust assets, and the settlor must therefore report them in full. This obligation persists even if the settlor has been formally excluded as a beneficiary — the DGT's "disregard" of the trust structure means the settlor is simply treated as the direct owner.

Planning Implications: Which Trust Structure is More Tax-Efficient in Spain?

The planning implications of the discretionary vs. fixed interest distinction flow directly from the analysis above.

For Existing Trusts: Pre-Residency Review

Anyone planning to become a Spanish tax resident who is already a party to a fixed interest or discretionary trust should undertake a detailed tax review before the move. Once Spanish tax residency is established, the full force of the DGT's attribution rules applies, and restructuring becomes significantly harder and potentially gives rise to taxable events in Spain or in the trust's home jurisdiction.

Discretionary Trusts: The Deferral Argument

From a Spanish tax planning perspective, a genuinely discretionary trust that is irrevocable and where the settlor has been excluded offers potential advantages over a fixed interest structure: ISD on the trust fund may be deferred until distributions are made, and discretionary beneficiaries may have an argument — at least under the current AEAT FAQ — against mandatory Modelo 720 reporting. However, these advantages are contingent on the trust being substantively discretionary in practice, on the settlor being genuinely excluded, and on the Spanish resident not being the settlor.

Fixed Interest Trusts: Predictability at a Cost

The fixed interest beneficiary faces a more predictable but potentially more costly position in Spain: annual IRPF on trust income, ISD on the life interest at the settlor's death, and mandatory Modelo 720 reporting. The upside is that the position is clearer and more defensible — there is less ambiguity about what is owed and when, reducing the risk of unexpected assessments in a compliance review.

The Beckham Law Interaction

Individuals who have opted for the special impatriates' regime under Article 93 IRPF (the "Beckham Law") are taxed only on Spanish-source income during the first years of their Spanish residency. For such individuals, foreign trust income may not be subject to Spanish IRPF during the Beckham Law period — whether the trust is discretionary or fixed interest. However, this protection has limits: the Beckham Law does not suspend Modelo 720 obligations or ISD on trust distributions, and careful analysis of what constitutes "Spanish-source" income in the trust context is required.

Frequently Asked Questions