Cayman Islands

Tax-deferred employer plans

The National Pensions Act (2024 Revision) requires employers in the Cayman Islands to provide pension coverage for employees. Employers and employees each contribute a minimum of 5% of pensionable earnings (10% in total, up to the year's maximum pensionable earnings) to a registered pension plan. Plans are administered by licensed pension plan administrators and must be approved by the Department of Labour and Pensions. The exemption is available only to an ‘eligible individual’ under §5.02: someone who is compliant (or comes into compliance) with U.S. income-tax filing and has reported the plan’s contributions, earnings, and distributions as income to the extent U.S. law requires; a participant who never reported plan earnings cannot rely on it until they do.

Registered pension plans under the National Pensions Act hold assets in trust arrangements managed by licensed administrators. Under Treas. Reg. §301.7701-7, these plans are foreign trusts if administered outside the United States with no U.S. court exercising primary supervision, which is the case for Cayman pension trusts.

Rev. Proc. 2020-17 does not require a treaty, so the absence of a U.S.–Cayman Islands income tax treaty does not by itself disqualify a registered pension plan. Whether it qualifies instead depends on whether it independently satisfies the revenue procedure's conditions (including local tax treatment, contribution limits, withdrawal restrictions tied to retirement age, disability, or death, and, for employer plans, nondiscrimination), which requires plan-specific analysis.

Absent a qualifying exemption, U.S. participants in Cayman pension plans file as the note at the end of this section explains for a plan an employer contributes to.

For a plan an employer contributes to, a trust holding it is generally a nonexempt employees’ trust described in §402(b). §6048(a)(3)(B)(ii) excepts transfers to §402(b), §404(a)(4), and §404A trusts from Part I, the participant’s own contributions included, and §679 does not make the participant the owner (see the Reporting Guide’s employer-plan section). Payouts the participant reports as compensation income are excepted from Part III. If the participant’s own contributions ever exceed the employer’s, the participant is treated as the owner of the part those contributions fund (Treas. Reg. §1.402(b)-1(b)(6)), reports it on Part II and Form 3520-A each year it is owned, and is taxed on its income each year. In that count, what the participant chose to put in, salary sacrifice included, is the participant’s, and anything the plan’s rules required taken from pay is the employer’s, as the IRS chief counsel read a national retirement fund in 1997. The rest is taxed when it vests and, after that, when paid out (§402(b)(1), (2)).

Trust law framework

The Cayman Islands trust regime is governed by the Trusts Act (2021 Revision), derived from English common law but substantially modernized through statutory amendments. The jurisdiction imposes no income tax, no capital gains tax, and no estate or inheritance tax. There is no U.S.–Cayman Islands income tax treaty.

For U.S. tax purposes, a Cayman trust is a foreign trust under Treas. Reg. §301.7701-7 unless both the court test and the control test are satisfied to make it domestic. In practice, virtually all Cayman trusts are foreign trusts. The absence of a tax treaty means there is no treaty-based deferral or exemption for income earned within the trust.

STAR trusts and purpose trusts

The Special Trusts (Alternative Regime), known as STAR, is codified in Part VIII of the Trusts Act. STAR trusts may be established for persons, purposes, or both. Unlike ordinary trusts, STAR trusts are enforced by a designated "enforcer" rather than by beneficiaries, which means that beneficiaries may have no standing to compel distributions or to obtain information about the trust.

This enforcement structure creates genuine complexity for U.S. classification. Under the grantor trust rules (IRC §§671–679), a U.S. person who transfers property to a STAR trust is treated as the owner under §679(a)(1) if the trust has (or may have) a U.S. beneficiary, whether or not it is revocable or the grantor retains powers. Beneficiary standing under Cayman law does not affect either test: §679(c) asks only whether trust income or corpus may be paid to or accumulated for a U.S. person, and §6048(c) applies to any U.S. person who actually receives a distribution.

Practitioners should analyze each STAR trust on its specific terms. The existence of an enforcer who is not a beneficiary, and the potential for purpose-only STAR trusts with no individual beneficiaries, raises classification questions that the IRS has not directly addressed in published guidance.

Fund structures

The Cayman Islands is the dominant domicile for offshore investment funds. Many hedge funds, private equity funds, and venture capital funds use Cayman entities, including unit trusts, exempted limited partnerships with trust components, and master-feeder structures where the offshore feeder may be organized as a trust.

A U.S. person who invests in a Cayman fund structured as a unit trust is investing in a foreign trust. Depending on the structure, the U.S. investor may be treated as the owner of a portion of the trust (triggering Forms 3520 and 3520-A) or as a beneficiary receiving distributions (triggering Form 3520 Part III). However, many fund entities are classified as corporations or partnerships for U.S. tax purposes under the check-the-box regulations (Treas. Reg. §301.7701-2 and -3), which takes the arrangement outside the foreign trust reporting regime.

Practitioners should obtain the fund's U.S. tax classification before assuming that Form 3520 does not apply. Whether a Cayman unit trust is a trust for U.S. purposes is decided under Treas. Reg. §301.7701-4 (an investment trust whose trustee can vary the investments is a business entity, not a trust), and a business entity that files no Form 8832 defaults under §301.7701-3(b)(2) to corporate status if all interest-holders have limited liability.

Penalties and practical notes

A U.S. person who creates or transfers property to a Cayman trust must report the transfer on Form 3520 Part I (§6048(a)). A U.S. person treated as the owner of a Cayman trust must file Form 3520-A and Form 3520 Part II annually (§6048(b)). A U.S. person who receives a distribution from a Cayman trust must report it on Form 3520 Part III (§6048(c)). The same obligations apply to U.S. participants in Cayman registered pension plans that are classified as foreign trusts.

Failure-to-file penalties under §6677(a) are the greater of $10,000 or 35% of the gross reportable amount for Parts I and III of Form 3520. For Part II (U.S. owner reporting) and Form 3520-A, the penalty under §6677(b) is the greater of $10,000 or 5% of the gross reportable amount. Failure continuing more than 90 days after IRS notice adds $10,000 per 30-day period.

Because the Cayman Islands imposes no income tax, there are no foreign tax credits to offset the U.S. tax on trust income. All income earned by a grantor trust is taxable to the U.S. grantor at full U.S. rates.