Foreign Tax Credit Limitation for Hong Kong Americans: Basket Allocation Between High and Low Tax Jurisdictions

For a US citizen or Green Card holder residing in Hong Kong, the Foreign Tax Credit (FTC) is the primary mechanism to avoid double taxation on income that is both sourced in Hong Kong and subject to US worldwide taxation. However, the FTC is not a dollar-for-dollar offset of all foreign taxes paid. The IRC § 904(a) limitation caps the credit at the proportion of US tax liability that the taxpayer’s foreign-source taxable income bears to their total worldwide taxable income. For the Hong Kong American, this limitation becomes acutely problematic when income is sourced from jurisdictions with disparate tax rates. The Tax Cuts and Jobs Act (TCJA) introduced a mandatory “basket” system under IRC § 904(d), requiring taxpayers to separate foreign-source income into distinct categories, most notably the “passive category income” basket and the “general category income” basket. A 2025 regulatory development—the IRS’s continued focus on “basket fragmentation” in audits of US expatriates—means that misallocating a single Hong Kong dividend or a Mainland China capital gain between baskets can trigger a recomputation of the entire FTC limitation, potentially disallowing credits for years. This article examines the mechanics of basket allocation for the Hong Kong-based US person, the trap of high-tax versus low-tax jurisdiction income, and the strategic use of the “high-tax kick-out” election under IRC § 904(d)(2)(F).

The Mechanics of the FTC Limitation and Basket System

The IRC § 904(a) Formula and Its Application to Hong Kong Income

The FTC limitation is calculated using the following formula:

Foreign Tax Credit Limitation = (Foreign-Source Taxable Income / Worldwide Taxable Income) × US Tax Liability (before FTC)

For a Hong Kong resident filing a US tax return, this means that the total foreign taxes paid (primarily Hong Kong salaries tax, profits tax, or property tax) cannot offset more than the US tax attributable to that foreign-source income. If the Hong Kong effective tax rate is lower than the US effective tax rate, the credit is generally fully usable. However, if the Hong Kong effective tax rate is higher (a rare scenario given HK’s flat 15% standard rate on salaries tax and 16.5% on profits tax), the excess credits cannot be carried back but may be carried forward up to ten years under IRC § 904(c).

The critical nuance for the Hong Kong American is the sourcing of income. Under US sourcing rules (IRC §§ 861-865), compensation for services performed in Hong Kong is foreign-source income. Dividends from a Hong Kong corporation are generally foreign-source, but dividends from a US corporation are US-source, even if paid to a Hong Kong resident. This distinction directly impacts the numerator of the FTC limitation formula. A common error is treating all Hong Kong bank interest as passive category income, when in fact interest from a Hong Kong branch of a US bank may be US-source under IRC § 861(a)(1)(A), thereby reducing the FTC limitation.

The Two Mandatory Baskets: General vs. Passive

The TCJA collapsed the previous nine baskets into two: the general category income basket and the passive category income basket (IRC § 904(d)(1)). For the Hong Kong American, the allocation is straightforward for most earned income. Salaries tax paid to the Hong Kong Inland Revenue Department (IRD) on employment income is general category income. Profits tax paid on active business income from a Hong Kong sole proprietorship or partnership is also general category income.

Passive category income includes dividends, interest, rents, royalties, and net capital gains from the sale of property that produces passive income (IRC § 904(d)(2)(B)(i)). This is where the Hong Kong investor faces the most complexity. A Hong Kong-domiciled dividend from a real estate investment trust (REIT) is passive category income. Interest from a Hong Kong savings account is passive category income. A capital gain from selling shares in a Hong Kong-listed company is passive category income, unless the taxpayer held the shares as a dealer or trader in the ordinary course of business.

The consequence of misallocation is severe. If a taxpayer erroneously places a high-tax passive item (e.g., Hong Kong property tax on rental income at a 15% effective rate) into the general basket, the passive basket may show a lower foreign tax credit limitation, and the IRS may disallow the excess credits upon examination. The statute of limitations for assessment under IRC § 6501(a) is generally three years from the filing date, but a substantial omission of foreign-source income (exceeding 25% of gross income) extends this to six years under IRC § 6501(e)(1)(A).

The High-Tax Kick-Out Election: A Strategic Tool for Hong Kong Americans

IRC § 904(d)(2)(F) and the 90% Threshold

The high-tax kick-out election under IRC § 904(d)(2)(F) allows a taxpayer to reclassify an item of passive category income as general category income if the foreign income tax paid on that item exceeds 90% of the maximum US tax rate that would apply to that item. For 2025, with the top US marginal rate at 37% (plus the 3.8% Net Investment Income Tax (NIIT) under IRC § 1411 for high earners), the maximum rate is effectively 40.8%. The 90% threshold is therefore 36.72% (40.8% × 0.9).

For the Hong Kong American, this election is most relevant for Hong Kong rental income subject to property tax. Hong Kong property tax is levied at a flat rate of 15% on the net assessable value (after an 20% statutory deduction for repairs and outgoings). The effective tax rate on gross rental income is approximately 12%. This is well below the 36.72% threshold, so the high-tax kick-out does not apply to standard Hong Kong property tax.

However, consider a Hong Kong resident who owns a rental property in a high-tax jurisdiction such as Japan (where the effective tax rate on rental income can exceed 40% after national and local taxes) or Australia (where non-resident withholding tax on rental income is 30% plus the Medicare levy). If the foreign tax paid exceeds the 36.72% threshold, the taxpayer can elect to treat that rental income as general category income. This is advantageous because the general basket typically has a higher FTC limitation due to the inclusion of high-income earned income, allowing the excess credits to be fully utilized.

Practical Application for the Hong Kong Portfolio

The high-tax kick-out election must be made on a timely filed original return (including extensions) and applies to all items of income in the same separate category (IRC § 904(d)(2)(F)(ii)). For the Hong Kong American with a diversified portfolio, this means that if one passive item meets the threshold, the taxpayer may be required to reclassify all similar passive items. This is a trap for the unwary. For example, if a Hong Kong resident holds a Japanese real estate fund generating high-tax passive income, and also holds a US dividend-paying stock generating low-tax passive income, the election to kick out the Japanese income may force the reclassification of the US dividend income as well, potentially reducing the overall FTC benefit.

The IRS has issued limited guidance on this interaction. In Notice 2007-25, the IRS clarified that the high-tax kick-out is applied on an item-by-item basis, not on a basket-wide basis. However, the regulations under Treas. Reg. § 1.904-4(c) require that items within a single “separate category” (e.g., all passive income from a single country) be aggregated for the purpose of the election. For the Hong Kong American, this means that a single high-tax passive item from a single jurisdiction can trigger the reclassification of all passive income from that jurisdiction. Strategic separation of investments across different jurisdictions is therefore essential.

Basket Allocation for Hong Kong-Based Business Owners

The Active Business Exception and Look-Through Rules

For the Hong Kong American who operates a Hong Kong company (a “Hong Kong incorporated” entity), the classification of income between baskets depends on the nature of the underlying business. Under the look-through rules of IRC § 904(d)(3), dividends, interest, rents, and royalties received from a controlled foreign corporation (CFC) or a non-controlled 10%-owned foreign corporation are not automatically passive. Instead, they are allocated to the basket that corresponds to the underlying income of the paying corporation.

For a Hong Kong company that generates active trading income (e.g., a trading company buying and selling goods), dividends paid to the US shareholder are general category income. For a Hong Kong company that generates passive investment income (e.g., a family office holding company), dividends are passive category income. This distinction is critical for the FTC limitation. If the US shareholder receives a dividend from a Hong Kong company that has both active and passive income, the dividend must be “looked through” to the proportionate share of each type of income. The regulations under Treas. Reg. § 1.904-5(c)(4) require that the look-through be applied to each dividend separately, based on the accumulated earnings and profits of the foreign corporation.

The Subpart F and GILTI Interaction

For the Hong Kong American who is a 10% or greater shareholder of a Hong Kong corporation, the Subpart F rules (IRC §§ 951-964) and the Global Intangible Low-Taxed Income (GILTI) provisions (IRC § 951A) create additional basket complexities. Subpart F income (e.g., passive income, sales income from related parties) is generally treated as general category income. GILTI is treated as a separate category of foreign-source income under IRC § 904(d)(1)(A), and the FTC limitation for GILTI is calculated separately.

For the Hong Kong corporation with a low effective tax rate (Hong Kong’s 8.25% concessionary rate for qualifying profits under the two-tiered profits tax regime), GILTI inclusion is almost certain. The GILTI FTC limitation is particularly punitive: under IRC § 960(d), the FTC for GILTI is limited to 80% of the foreign income taxes paid, and the credit cannot be carried forward. This means that a Hong Kong American with a Hong Kong company paying 8.25% Hong Kong profits tax will face a US GILTI inclusion on the excess of the tested income over a 10% deemed return on qualified business asset investment (QBAI), and the FTC will only offset 80% of that foreign tax. The result is a residual US tax liability on the GILTI inclusion.

The basket allocation for GILTI is straightforward—it is a separate basket—but the interaction with the high-tax kick-out election is not. Under proposed regulations (REG-105495-19), the IRS has indicated that the high-tax kick-out election does not apply to GILTI. This means that even if the Hong Kong corporation’s effective tax rate exceeds the 90% threshold, the GILTI inclusion remains in its own basket, and the FTC limitation is calculated separately. This is a significant trap for Hong Kong Americans with profitable Hong Kong companies.

Strategic Takeaways for the Hong Kong American

1. Separate passive income by jurisdiction. To avoid the aggregation trap of the high-tax kick-out election, maintain separate investment accounts and legal entities for investments in high-tax jurisdictions (e.g., Japan, Australia, Mainland China) and low-tax jurisdictions (e.g., Hong Kong, Singapore). This allows for elective reclassification without contaminating low-tax passive income.

2. Model the FTC limitation before year-end. Use the IRC § 904(a) formula with estimated Hong Kong salaries tax, profits tax, and property tax to determine whether you are in a “limitation” position. If the foreign tax credit ratio (foreign-source income / worldwide income) is below 100%, consider strategies to increase foreign-source income, such as deferring US-source capital gains or accelerating Hong Kong business income.

3. Elect the high-tax kick-out only after a full portfolio review. The election is all-or-nothing for items within the same separate category from the same jurisdiction. Before making the election, calculate the impact on all passive items from that jurisdiction, including those with low foreign tax rates.

4. For Hong Kong company owners, treat GILTI as a separate planning item. The 80% FTC limitation for GILTI and the inability to carry forward excess credits means that Hong Kong profits tax paid is only partially usable. Consider whether a check-the-box election under Treas. Reg. § 301.7701-3 to treat the Hong Kong company as a disregarded entity for US purposes is beneficial, particularly if the company has low QBAI.

5. Maintain contemporaneous documentation of basket allocation. The IRS examination cycle for US expatriates is currently 3-5 years, with a focus on FTC basket allocation. Maintain a schedule showing the sourcing of each income item, the applicable Hong Kong tax paid, and the basket allocation. Reference the IRC § 904(d) categories on Form 1116, Foreign Tax Credit, and attach a statement explaining any high-tax kick-out elections.

Disclaimer: 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.