Hong Kong is a low-tax jurisdiction with no comprehensive US income tax treaty or social security totalization agreement. For Americans in Hong Kong, this means double-tax relief relies on US domestic provisions like the Foreign Earned Income Exclusion and the Foreign Tax Credit. Self-employed individuals face a significant compliance point as they remain fully liable for US self-employment taxes.
US filing basics every American abroad must know
US citizens and green-card holders are taxed on worldwide income wherever they live, and usually must file Form 1040 once gross income exceeds the IRS threshold (roughly $15,000 to $30,000 depending on filing status for recent years), even when no tax is ultimately due. The tools that prevent double taxation are the Foreign Earned Income Exclusion (FEIE, up to $130,000 for 2025 under IRC §911) and the Foreign Tax Credit.
Two reporting rules catch most filers in Hong Kong: the FBAR (FinCEN Form 114), required when foreign financial accounts exceed $10,000 in aggregate at any point in the year, and Form 8938 (FATCA) for specified foreign assets above the applicable threshold. Both can carry penalties even when no tax is owed. If you are behind, the Streamlined Filing Compliance Procedures are the usual penalty-free path back for non-willful taxpayers.
US tax treaty with Hong Kong
There is no comprehensive income tax treaty between the United States and Hong Kong. Consequently, there are no treaty-based reductions in withholding tax rates or special rules for pensions or capital gains. Double taxation is avoided primarily through the US Foreign Tax Credit (FTC) and the Foreign Earned Income Exclusion (FEIE). A Tax Information Exchange Agreement (TIEA) is in place, but this agreement only facilitates the sharing of tax information and does not provide any tax relief to individuals.
Mandatory Provident Fund (MPF) and US Tax
Hong Kong's Mandatory Provident Fund (MPF) is not considered a 'qualified' retirement plan by the IRS, leading to unfavorable US tax treatment. This has several key consequences:
- Contributions: Employer contributions to your MPF are considered taxable US income in the year they are made. Employee contributions are made with post-tax dollars and are not deductible on a US return.
- Growth: Unlike a 401(k), investment growth (such as interest, dividends, and capital gains) inside an MPF is generally taxable in the US each year as it accrues, even if you do not take a distribution.
- Reporting: An MPF is a foreign financial account. It must be reported on FinCEN Form 114 (FBAR) if your aggregate foreign account balances exceed $10,000. It also counts toward the thresholds for Form 8938 (Statement of Specified Foreign Financial Assets). Depending on its structure, it could also be viewed as a foreign trust, which can trigger reporting on Form 3520.
Investments, property, and capital gains in Hong Kong
Investing in Hong Kong requires careful navigation of US tax rules. Many locally available investment products, including mutual funds and ETFs, are likely to be classified as Passive Foreign Investment Companies (PFICs). Owning PFICs requires filing Form 8621 for each fund, and without specific, timely elections, the income is taxed under a punitive default regime. Furthermore, while Hong Kong does not tax capital gains, the US does. The sale of property or other capital assets in Hong Kong at a gain will generate a taxable capital gain on your US tax return. Finally, if you own 10% or more of a Hong Kong corporation, you may need to file Form 5471. If the company is a Controlled Foreign Corporation (CFC), you could be taxed currently on its earnings under the GILTI or Subpart F rules, even if you receive no dividends.
Self-employment and companies in Hong Kong
A critical point for self-employed US citizens in Hong Kong is that there is no social security totalization agreement between the United States and Hong Kong. This means you cannot get a Certificate of Coverage to avoid US social security and Medicare taxes. If you have net self-employment earnings of $400 or more, you owe the full US self-employment tax (15.3% on the first tier of earnings). This tax is calculated on your net earnings before the Foreign Earned Income Exclusion. Using the FEIE on Form 2555 to exclude your income from US income tax does not reduce your liability for US self-employment tax.
Worked examples
Salaried employee on local payroll (2025)
A US citizen works as a marketing manager in Hong Kong with a salary of USD 160,000. Her employer contributes 5% (USD 8,000) to her Mandatory Provident Fund (MPF). For US tax purposes, her foreign earned income is USD 160,000, and the USD 8,000 MPF contribution is separate taxable income that cannot be excluded by the FEIE. She uses the Foreign Earned Income Exclusion (FEIE), which for 2025 is $130,000, to exclude a portion of her salary. This leaves USD 30,000 of her salary plus the USD 8,000 MPF contribution subject to US income tax. She must also report her MPF account on her FBAR and potentially Form 8938, and she may have to report the annual investment growth within the MPF as current income.
Self-employed consultant (2025)
A US citizen works as a freelance graphic designer in Hong Kong, earning USD 110,000 in net self-employment income. Using the FEIE, she can exclude the full $110,000 from her US income tax, resulting in zero income tax. However, because there is no totalization agreement, she owes US self-employment tax on her earnings. Her self-employment tax liability would be calculated on her net earnings (approximately $110,000 * 0.9235 * 0.153), totaling around $15,500. She cannot use contributions to any Hong Kong system to offset this US tax.
Investor selling property (2025)
A retiree living in Hong Kong sells a residential property for USD 1.5 million that she originally purchased for USD 900,000. The sale is completely tax-free in Hong Kong. For US tax purposes, she has a USD 600,000 capital gain. If the property was her primary residence, she may exclude up to $250,000 (or $500,000 if married) of the gain under Section 121. Any remaining gain is fully reportable and taxable in the United States. Additionally, her investment portfolio contains several Hong Kong-domiciled mutual funds. These are PFICs, requiring her to file multiple Form 8621s and pay US tax on the funds' earnings, potentially at high penalty rates.
Common mistakes for Americans in Hong Kong
- Assuming a US-Hong Kong tax treaty exists to lower taxes.
- Believing the Foreign Earned Income Exclusion (FEIE) eliminates the need to pay US self-employment tax.
- Attempting to obtain a Certificate of Coverage to avoid US self-employment tax, which is not possible for Hong Kong.
- Forgetting to include employer contributions to an MPF as taxable income on their US return.
- Failing to report and pay US tax on the annual, unrealized investment growth inside an MPF.
- Not reporting Hong Kong-based mutual funds or ETFs as PFICs on Form 8621.
- Thinking that a property sale is tax-free for US purposes just because it is tax-free in Hong Kong.
- Omitting the MPF account from the annual FBAR (FinCEN Form 114) filing.
Hong Kong tax FAQ
Is there a US-Hong Kong tax treaty?
No, there is no comprehensive income tax treaty between the US and Hong Kong. This means there are no treaty benefits like reduced withholding rates. Tax relief is managed through US domestic law, primarily the Foreign Earned Income Exclusion and the Foreign Tax Credit.
Do I have to pay US Social Security tax if I'm self-employed in Hong Kong?
Yes. There is no US-Hong Kong totalization agreement, so a self-employed US person with net earnings over $400 is fully liable for US self-employment tax (Social Security and Medicare). The Foreign Earned Income Exclusion does not reduce this tax.
How is my Hong Kong Mandatory Provident Fund (MPF) taxed in the US?
The IRS does not treat the MPF as a qualified retirement plan. This means employer contributions are taxable income to you in the year they are made, and the fund's internal investment growth is generally taxable to you each year as it accrues, even if not distributed.
Do I need to report my MPF on an FBAR?
Yes. An MPF is a foreign financial account. Its value must be included with your other foreign accounts, and if the total value exceeds $10,000 at any point during the year, you must file a FinCEN Form 114, Report of Foreign Bank and Financial Accounts (FBAR).
I sold my Hong Kong apartment. Is the profit taxable in the US?
Yes. Even though Hong Kong does not have a capital gains tax, the US taxes the worldwide income of its citizens. The gain from the sale of your Hong Kong property is reportable and subject to US capital gains tax. However, the Section 121 primary residence exclusion applies to foreign properties, potentially excluding up to $250,000 (or $500,000 if married) of the gain if the property was your primary residence.
Are my Hong Kong mutual funds a problem for my US taxes?
They can be. Most non-US funds, including those in Hong Kong, are considered Passive Foreign Investment Companies (PFICs). Owning PFICs triggers complex reporting on Form 8621 and can lead to very high tax rates unless specific and timely elections are made.
Can I use the Foreign Earned Income Exclusion (FEIE) in Hong Kong?
Yes. If you meet the Bona Fide Residence Test or the Physical Presence Test, you can use the FEIE (claimed on Form 2555) to exclude up to $130,000 (for tax year 2025) of your foreign earned income from US income tax.
My employer contributes to my MPF. Is that money tax-free?
No. For US tax purposes, contributions made by your employer to your MPF are considered part of your current compensation. You must include the value of those contributions as taxable income on your US tax return for the year they are made.
Sources and last reviewed
- IRS, Foreign Earned Income Exclusion (verified 2026-06-07)
- IRS, Instructions for Form 5471 (verified 2026-06-07)
- SSA, Totalization Agreements Overview (verified 2026-06-07)
- Hong Kong Inland Revenue Department (verified 2026-06-07)
Last reviewed 2026-06-07.
Asia depth guide
For filing context specific to Hong Kong in APAC, see the dedicated guide on US Tax Asia, Hong Kong (separate site, complementary content).
Common services needed by expats in Hong Kong
Most Americans abroad in Hong Kong need help with at least one of the following core compliance areas, which frequently interact:
- US expat tax returns, Form 1040 with FEIE, FTC, treaty positions, and any required state returns.
- FBAR reporting, FinCEN Form 114 for foreign financial accounts exceeding $10,000 aggregate at any time during the year.
- Form 8938 (FATCA), IRS disclosure of specified foreign financial assets when thresholds are met.
- Streamlined catch-up filing, For eligible non-willful taxpayers with prior unfiled years.