Cross-Border Rabbi Trusts for Hong Kong Employees: US Tax Treatment of Secular and Non-Secular Trusts

The growing trend of US multinationals and Hong Kong-headquartered groups using deferred compensation arrangements for senior executives has collided with two distinct tax regimes in 2025. For a US citizen or Green Card holder employed by a Hong Kong entity—or a Hong Kong tax resident working for a US parent—the choice between a secular trust and a non-secular (rabbi) trust creates fundamentally different US and Hong Kong tax outcomes. The US Internal Revenue Service (IRS) has signalled increased scrutiny of nonqualified deferred compensation (NQDC) arrangements under IRC § 409A, particularly where the funding vehicle crosses borders. Meanwhile, the Hong Kong Inland Revenue Department (IRD) maintains its territorial source principle under the Inland Revenue Ordinance (Cap. 112), which can render the same trust arrangement either fully taxable or fully exempt depending on where the services are performed and where the trust sits. This article examines the US federal income tax treatment of secular and non-secular trusts used by Hong Kong employers, the interaction with IRC § 409A, and the Hong Kong tax consequences for the employee-beneficiary.

The Two Trust Structures: Secular vs. Non-Secular (Rabbi) Trusts

The fundamental distinction between a secular trust and a non-secular (rabbi) trust lies in the creditor protection afforded to the employee-beneficiary and, consequently, the timing of US income inclusion.

Secular Trusts: Immediate Vesting, Immediate Taxation

A secular trust is a funded, non-qualified deferred compensation arrangement where the trust assets are held for the exclusive benefit of the employee and are not subject to the claims of the employer’s general creditors. Under US tax principles, this structure is treated as a grantor trust for the employee under IRC § 677, meaning the employee is taxed on the trust’s income and growth as it accrues, not when distributed. For a US citizen or Green Card holder working in Hong Kong, the full amount of employer contributions and trust earnings is includible in gross income in the year of contribution or accrual, regardless of whether the employee receives a distribution. The employee must report this income on Form 1040 and, if applicable, file FinCEN Form 114 (FBAR) and Form 8938 (FATCA) for any foreign financial accounts holding the trust assets.

The Hong Kong tax treatment under the territorial source rule (Section 8(1) of the IRO) depends entirely on where the employee performs the services that give rise to the deferred compensation. If the services are performed wholly in Hong Kong, the deferred amount is chargeable to salaries tax in the year of accrual, not the year of distribution. The IRD takes the position that deferred compensation is sourced to the location of the services that generated it (DIPN 10, revised 2023). If the employee performs services partly outside Hong Kong, a time-apportionment claim under Section 8(1A)(b)(ii) may reduce the Hong Kong tax liability, but the US tax liability remains on the full amount due to worldwide taxation.

Non-Secular (Rabbi) Trusts: Deferred Taxation, Creditor Risk

A rabbi trust is a funded arrangement where the trust assets remain subject to the claims of the employer’s general creditors in the event of insolvency or bankruptcy. Because the employee does not have a secured, vested right to the assets, the US tax treatment defers income inclusion until the year the employee actually receives the distribution or the year the assets are no longer subject to a substantial risk of forfeiture, whichever is later. This is the operative rule under IRC § 451 and the economic benefit doctrine. The trust itself is a grantor trust for the employer under IRC § 671, meaning the employer is taxed on the trust’s investment income during the deferral period.

For a Hong Kong employee who is a US person, the rabbi trust offers a critical advantage: no current US tax on the deferred compensation until the Hong Kong employer makes the distribution. However, the employee must still comply with FBAR and FATCA reporting for any foreign financial account in which the employee has a financial interest or signature authority. The IRS has clarified in Chief Counsel Advice 2004-24-007 that a rabbi trust interest is not a “financial account” for FBAR purposes if the employee has no legal ownership or control over the trust assets, but this position is fact-specific and requires careful documentation.

The § 409A Trap for Cross-Border Arrangements

IRC § 409A imposes strict requirements on all NQDC arrangements, including both secular and rabbi trusts. The statute requires that deferral elections be made before the year in which the services are performed (Section 409A(a)(4)(B)(i)), that distributions occur only upon specified events (separation from service, disability, death, a fixed time, change in control, or an unforeseeable emergency) (Section 409A(a)(2)(A)), and that no acceleration of payments is permitted. A failure to comply results in immediate inclusion of all deferred amounts in gross income, plus a 20% additional tax under Section 409A(a)(1)(B)(i)(II) and interest at the underpayment rate plus 1%.

For cross-border arrangements involving a Hong Kong employer, the § 409A compliance burden is particularly acute. The definition of “separation from service” under Section 409A(a)(2)(A)(i) must account for the possibility that the employee transfers between a US entity and a Hong Kong entity within the same controlled group. Treasury Regulation § 1.409A-1(h)(1)(ii) provides that a separation from service occurs when the employee and employer reasonably anticipate that the level of services will permanently decrease to less than 50% of the average level over the prior 36 months. A Hong Kong employee who transfers to a US affiliate without a formal termination may inadvertently trigger a § 409A violation if the deferred compensation plan does not explicitly address intra-group transfers.

Hong Kong Territorial Source Analysis for Deferred Compensation

The IRD’s approach to deferred compensation under the territorial source rule creates a potential mismatch with US tax treatment that requires careful planning.

Source of Deferred Compensation: The Service Location Test

The IRD’s long-standing position, articulated in DIPN 10 (revised 2023), is that deferred compensation is sourced to the location where the services giving rise to the compensation are performed. This is consistent with the Hong Kong Court of Final Appeal’s decision in Commissioner of Inland Revenue v. Li Fung Limited (1992) 2 HKCFAR 1, which established that the source of income from services is the place of performance. For a US citizen working in Hong Kong under a rabbi trust arrangement, the deferred compensation is Hong Kong-sourced if all services are performed in Hong Kong. The employee must include the deferred amount in salaries tax for the year of accrual under Section 8(1) of the IRO, even though no cash is received.

The practical problem arises when the employee receives a distribution in a later tax year. The IRD will not reassess the earlier year simply because the employee now has cash. The employee must file a salaries tax return for the year of accrual and pay tax on the deferred amount, even if the trust has not yet distributed. If the employee subsequently leaves Hong Kong before the distribution, the Hong Kong tax paid on the deferred amount may become a stranded tax credit, as the distribution year will have no Hong Kong source income to offset against.

Time-Apportionment and the 60-Day Rule

For employees who perform services partly outside Hong Kong, Section 8(1A)(b)(ii) of the IRO permits a time-apportionment claim. The deferred compensation is apportioned based on the number of days spent in Hong Kong performing services versus days outside Hong Kong. The IRD requires that the employee maintain a contemporaneous travel log and that the employer’s records support the allocation. The 60-day rule under Section 8(1B) provides that if an employee is present in Hong Kong for no more than 60 days in a tax year and the services are performed entirely outside Hong Kong, the income is not chargeable to salaries tax. However, this rule is rarely available for US citizens working in Hong Kong, as most maintain a Hong Kong employment contract and perform services here for more than 60 days.

The interaction with US tax is critical. The foreign tax credit under IRC § 901 allows the employee to credit Hong Kong salaries tax paid on the deferred compensation against US tax liability on the same income. However, the credit is limited to the US tax attributable to the foreign-source income. If the Hong Kong tax is paid in a different year than the US tax inclusion (which occurs for rabbi trusts), the credit must be carried forward or backward under Section 904(c). The carryforward period is 10 years, but the carryback period is only 1 year. A Hong Kong employee who pays salaries tax on deferred compensation in Year 1 but receives the distribution in Year 5 must carry the credit forward to Year 5, assuming no foreign-source income in the intervening years.

Practical Structuring and Reporting Considerations

The choice between a secular trust and a rabbi trust for a Hong Kong employee who is a US person requires a fact-specific analysis of the employee’s expected service location, the employer’s creditworthiness, and the desired US tax timing.

Structuring for § 409A Compliance

Any deferred compensation plan using a trust must comply with § 409A from inception. The plan document must specify the time and form of distribution, the permissible distribution events, and the rules for intra-group transfers. For a Hong Kong employer, the plan should explicitly define “separation from service” to include a transfer from the Hong Kong entity to a US entity within the same controlled group, and should provide that such a transfer does not trigger an immediate distribution unless the employee’s services permanently decrease below the 50% threshold. The plan should also address the treatment of distributions to a US citizen who later becomes a Hong Kong tax resident, as the IRD may assert source jurisdiction over the distribution if the employee is a Hong Kong resident at the time of receipt.

Reporting Obligations for the Employee

A US citizen or Green Card holder who is a beneficiary of a rabbi trust must report the following annually:

• Form 1040: No income inclusion until distribution, unless the trust is a secular trust.
• FinCEN Form 114 (FBAR): If the employee has a financial interest in or signature authority over a foreign financial account (including a trust account), and the aggregate value exceeds USD 10,000 at any time during the calendar year. The IRS has not issued definitive guidance on whether a rabbi trust interest constitutes a “financial interest” for FBAR purposes, but the safer position is to file if the employee has the right to direct the trustee or receive distributions.
• Form 8938 (FATCA): If the employee is a specified individual with an interest in a specified foreign financial asset exceeding USD 50,000 (single) or USD 100,000 (married filing jointly) on the last day of the tax year, or exceeding USD 75,000 (single) or USD 150,000 (married filing jointly) at any time during the year. The rabbi trust interest is a specified foreign financial asset under Treasury Regulation § 1.6038D-3(a)(3).

The penalty for failure to file FBAR is USD 10,000 per violation for non-willful violations (31 U.S.C. § 5321(a)(5)(B)(i)), and the greater of USD 100,000 or 50% of the account balance for willful violations (31 U.S.C. § 5321(a)(5)(C)(i)). The penalty for failure to file Form 8938 is USD 10,000 per year, with an additional USD 10,000 for each 30-day period of non-compliance after IRS notice, up to a maximum of USD 60,000 (IRC § 6038D(d)).

The US-HK Tax Information Exchange Agreement (TIEA)

The US-HK TIEA, signed in 2014 and effective from 2015, permits the exchange of information between the IRS and the IRD for tax purposes. The TIEA covers all federal taxes in the US and all taxes in Hong Kong, including salaries tax and profits tax. The IRS has used the TIEA to obtain information on US persons with Hong Kong bank accounts and trust structures. A rabbi trust established by a Hong Kong employer for a US employee is within the scope of the TIEA, and the IRS may request information on the trust’s assets, contributions, and distributions. The employee should assume that the trust’s existence and the deferred compensation amounts are known to the IRS.

Actionable Takeaways

1. A US citizen or Green Card holder employed by a Hong Kong entity should use a rabbi trust for deferred compensation to defer US income inclusion until distribution, provided the employer is creditworthy and the plan complies with IRC § 409A.
2. The Hong Kong salaries tax on deferred compensation accrues in the year the services are performed, not the year of distribution, creating a potential timing mismatch with the US foreign tax credit that requires careful carryforward planning under IRC § 904(c).
3. The deferred compensation plan document must explicitly address intra-group transfers between Hong Kong and US entities to avoid triggering an inadvertent § 409A violation upon separation from service.
4. The employee must file FBAR and Form 8938 annually for the rabbi trust interest, even if no income is currently taxable, to avoid penalties that can exceed the deferred compensation itself.
5. The US-HK TIEA ensures that the IRS has access to information on Hong Kong trust arrangements, so all reporting obligations should be treated as mandatory, not optional.

本文不構成稅務建議。涉及個人稅務情況請諮詢持牌會計師或稅務師。 This does not constitute tax advice. Consult a licensed CPA or tax advisor for your specific situation.