A trust is an Anglo-American legal arrangement: one person (the settlor or grantor) transfers assets to a trustee, who manages them under the founding document for one or more beneficiaries. It can be revocable or irrevocable, discretionary or with fixed rights for the beneficiaries, and it can have a protector or a committee overseeing the trustee. Colombia has no general equivalent; the closest is the fiducia mercantil of the Commercial Code (Arts. 1226 ff.), but they are not the same. In a fiducia mercantil the settlor (fiduciante) transfers specified assets to a trustee company (fiduciario) to manage or sell them for a purpose he sets, for his own benefit or that of another beneficiary (Art. 1226); only credit institutions and duly authorized trust companies may act as fiduciario (Art. 1226); the assets form a separate autonomous estate (Art. 1233) that is not part of the general security of the fiduciario's creditors (Art. 1227); and the Code prohibits secret fiduciary arrangements, those where the benefit passes to several persons in succession and those lasting more than twenty years, with exceptions (Art. 1230). The assets also cannot be pursued by the settlor's creditors, except those whose claims predate the arrangement, and an arrangement made in fraud can be challenged (Art. 1238). A foreign trust may not have those limits; so what works in a Colombian fiducia cannot always be carried over to a trust, or the other way around.
For DIAN, being abroad is not enough. Paragraph 1 of Article 882 of the Tax Code expressly lists trusts, autonomous estates, other fiduciary arrangements and private-interest foundations among the vehicles that can be controlled foreign entities (ECE), whether or not they have legal personality and whether or not they are transparent for tax purposes. For an ECE to exist, all the requirements of Article 882 must be met: it must be controlled by one or more Colombian tax residents and have no tax residence in Colombia. Residents with a direct or indirect interest of 10% or more in the capital or in the results are covered (Art. 883). Passive income (Art. 884) is deemed earned in the year the ECE obtains it, in proportion to the interest (Art. 886), is included in the income tax return (Art. 890), carries the Article 254 credit for taxes paid abroad (Art. 892), and its later distribution, already taxed, is not taxed again (Art. 893). Whether a given trust meets those requirements depends on its type and clauses. In Official Letter 3287 of 2018, DIAN analyzed an irrevocable foreign trust, with a US trustee and discretionary distributions, and concluded that the duties fall on the resident who obtains the economic benefit of the assets (possession, Tax Code Art. 263), which is determined case by case among the settlor, the contributor and the beneficiary, and that a resident beneficiary who receives a distribution, income or benefit must declare it in the income tax return. For net wealth tax, paragraph 3 of Article 295-3 of the Tax Code treats interests in foreign trusts as fiduciary rights (Arts. 271-1 and 288) and names the founder as the declarant when the beneficiaries are conditional or have no control or disposal over the assets, whether or not the trust is revocable or discretionary; if the founder dies, the unliquidated estate declares, and if the founder cannot be identified, the beneficiaries do. That rule operates only for net wealth tax.