What Tax Issues May U.S. Citizens of Taiwanese Origin Face When Investing in Taiwan-Based Funds?

As more and more Taiwanese individuals hold U.S. citizenship or U.S. permanent resident status, the U.S. tax treatment of overseas investments has become an increasingly important—yet often overlooked—issue. This is particularly true when investing in Taiwan-based funds, which may appear straightforward and reasonable under Taiwan's tax system, but can become highly complex and even punitive under U.S. tax law.

The U.S. Tax Classification of Taiwan Funds: PFIC

For most U.S. taxpayers, the most critical, and potentially risky, issue is that Taiwan-based funds may be classified as Passive Foreign Investment Companies (PFICs) under U.S. tax law.

PFIC rules were enacted to prevent U.S. taxpayers from deferring or avoiding U.S. taxation through foreign investment vehicles. Once an investment is classified as a PFIC, the investor is required to file Form 8621 and becomes subject to a special tax regime that differs significantly from the taxation of ordinary investments.

PFIC Qualification Criteria

According to the Internal Revenue Service (IRS), a foreign entity will be treated as a PFIC if it meets either of the following tests:

1. Income Test

   At least 75% of the entity's gross income is passive income, such as interest, dividends, or capital gains.

2. Asset Test

   At least 50% of the entity's assets are assets that produce, or are held for the production of, passive income.

   
   

Because Taiwan-based ETFs, mutual funds, and even certain savings-type or investment-linked insurance products primarily hold stocks and bonds to generate interest and capital gains, they almost always satisfy the PFIC definition.In contrast, directly holding shares of an operating company, such as TSMC, does not constitute a PFIC investment, as the company engages in active business operations.

The 3 PFIC Tax Methods

U.S. tax law provides three different methods for taxing PFIC investments. Which method applies depends on the nature of the investment and whether specific requirements are met. The rules are complex, so only a high-level overview is provided below.

1. Section 1291 (Default Regime)

• Capital gains and "excess distributions" are allocated retroactively to prior holding years.

• An excess distribution generally refers to the portion of a distribution that exceeds 125% of the average distributions received during the preceding three years.

• Amounts allocated to prior years are treated as ordinary income and taxed at the highest marginal tax rate applicable for those years (currently up to 37%), with interest imposed on the resulting tax liability.

2. Qualified Electing Fund (QEF)

• The investor reports their share of the fund's actual earnings annually, eliminating the excess distribution and retroactive allocation rules.

• The fund must provide an "Annual Information Statement" that meets IRS requirements and clearly reports the investor's allocable share of ordinary earnings and capital gains.

• Whether a Taiwan-based fund or ETF can provide IRS-compliant information is often the determining factor in whether the QEF election is feasible.

3. Mark-to-Market (MTM) Method

• The PFIC investment is revalued annually by comparing its fair market value at year-end with its adjusted tax basis.

• If the year-end fair market value exceeds the adjusted basis, the unrealized gain is treated as ordinary income for that year.

• This method is available only for investments that are traded on IRS-recognized qualified exchanges.

  
  

In practice, demonstrating that a Taiwan-based fund or ETF qualifies for QEF or MTM treatment can be difficult. As a result, many investors are forced to apply the Section 1291 default regime.

Dollar-Cost Averaging(DCA) May Increase the Tax Burden

In Taiwan, dollar-cost averaging is widely regarded as a sound strategy for reducing investment risk. However, under the PFIC rule, particularly when Section 1291 applies, this approach can significantly increase the tax burden.

When income is allocated to prior years under Section 1291, those amounts are taxed at the highest marginal rates and are subject to interest charges. Importantly, the interest calculation begins from the start of the holding period and continues through the current tax year. Because dollar-cost averaging typically involves long-term, continuous investing, the accumulated interest charges can become substantial over time, materially eroding investment returns.

Compliance Costs and Potential Risks Should Not Be Overlooked

Under IRS PFIC rules, Form 8621 may be required even if no distributions are received and no shares are sold. In addition, investors rarely make a single purchase and hold indefinitely. More commonly, they engage in repeated cycles of periodic purchases, dividend reinvestments, partial redemptions, and reinvestments. These transactions significantly complicate PFIC calculations and increase the difficulty and cost of compliance.

In many cases, for U.S. citizens of Taiwanese origin, investing directly in U.S.-domiciled ETFs or mutual funds may offer a simpler, more transparent, and more predictable tax outcome.