Taiwan Overseas Investment Tax Guide: CRS Facts + AMT Calculation for US Stocks & ETFs (2026)
Every May during tax season, the same anxiety cycles through Taiwan's investment communities: "Will my IBKR account get flagged by CRS?" "How much overseas income triggers taxes?" "I haven't sent the money back to Taiwan, so I should be fine, right?"
After cross-referencing official Ministry of Finance documents, CPA firm analyses, and the various claims circulating in online forums, the conclusion is clear: most people's CRS fears are vastly overblown, and their AMT calculations are seriously wrong — and together, these two misconceptions stop people from filing when they should, and panic when they shouldn't.
This guide gives you three things: whether CRS actually tracks your account, how to calculate AMT (with real numbers you can plug in), and what to do based on your specific investment type.
TL;DR
- IBKR, Firstrade, or other US broker accounts: CRS does NOT automatically report to Taiwan's tax authority, but you still have a self-reporting obligation
- UK/Japan/Australia broker accounts: CRS automatic exchange is active — compliance is more urgent
- NT$1 million is the reporting threshold (you must file), NT$7.5 million is the exemption (most people owe zero after filing)
- "No remittance = no reporting" is the most dangerous myth: selling = realization, regardless of whether funds return to Taiwan
- Different income types cannot offset each other: dividends and capital gains are separate categories — mixing them up can cost you NT$500,000
Does CRS Actually Track My US Stock Account?
The short answer: if your account is with a US broker (IBKR US, Firstrade, TD Ameritrade), CRS does NOT automatically report your account information to Taiwan.
The reason is straightforward. Taiwan's CRS automatic information exchange currently has bilateral agreements with only three jurisdictions:
| Exchange Partner | Status |
|---|---|
| Japan | Active |
| United Kingdom | Active |
| Australia | Active |
That's it. Due to Taiwan's political status, it cannot join the OECD's multilateral CRS framework (MCAA) and must negotiate bilateral agreements individually. Reportedly, negotiations are underway with about 23 additional jurisdictions, but as of early 2026, only these three are in effect.
The US doesn't participate in CRS at all — it uses its own FATCA mechanism. Taiwan and the US have a FATCA agreement (signed in 2016 via AIT and TECRO), but the direction is Taiwan's financial institutions reporting US persons' accounts to the IRS — not the other way around. A comprehensive Taiwan-US tax agreement (TIEA) is being negotiated as of 2024, but hasn't been concluded.
So the fact is: your IBKR US account data is not currently being automatically transmitted to Taiwan's National Tax Bureau via CRS.
However — this doesn't mean you can skip reporting. No CRS auto-reporting doesn't mean the tax bureau can't find you. They can launch targeted investigations (formal inquiry letters) to examine offshore accounts on a case-by-case basis. And once a Taiwan-US tax agreement is signed, the rules change. Building your filing strategy on "they can't catch me" is not sound planning.
Have an account with a UK, Japanese, or Australian broker? That's a different story. If you use Interactive Brokers UK or Japan's SBI Securities, your account information is already within the automatic exchange scope. Compliance for these accounts should be prioritized.
Two Numbers You Must Understand: NT$1M Reporting Threshold vs NT$7.5M Exemption
This is the most confused pair of numbers in Taiwan's investment communities. Too many people reverse, conflate, or think there's only one threshold.
Here's the clear breakdown:
| Threshold | Amount | What It Means | What You Do |
|---|---|---|---|
| Reporting threshold | NT$1 million | Household's total annual overseas income | ≥NT$1M: include ALL in basic income declaration |
| Exemption | NT$7.5 million | Deduction from basic income | Basic income ≤NT$7.5M: no AMT owed |
Gate 1: NT$1 million If your filing household's (including spouse and dependents) total overseas income for the year is ≥ NT$1 million, the entire amount must be included in your basic income calculation. Note: it's the full amount, not just the portion above NT$1M. Below NT$1M? Your overseas income is excluded entirely.
Gate 2: NT$7.5 million Basic income = regular comprehensive income + overseas income + specified insurance payouts + non-cash donations + separately taxed dividends, etc. If this total is ≤ NT$7.5 million, your basic tax is zero. Most investors whose only additional income is from overseas investments will stop here — filed, but zero tax owed.
What about NT$6.7 million? That was the old exemption for tax year 2023 and earlier. The Ministry of Finance raised it to NT$7.5 million starting from tax year 2024 (filed in May 2025). Articles still citing NT$6.7M are outdated.
Filing software tip: In the MOF's electronic filing software, overseas income goes in the "Basic Income Tax Declaration" form under the "Overseas Income" field. For the online version, find the "Basic Tax" section and enter under "Overseas Income."
AMT Calculation in Practice: Three Investor Scenarios
The formula itself isn't complicated, but until you run your own numbers, it's hard to know where you actually stand.
AMT formula:
Basic tax = (Basic income - NT$7.5 million) × 20%
Additional AMT owed = max(Basic tax, Regular income tax) - Regular income tax
If your basic tax ≤ regular income tax, you owe no additional AMT.
Three real scenarios:
Scenario A: Small-Scale ETF Investor
- Domestic salary net income: NT$800,000
- Overseas ETF dividends + capital gains: NT$600,000
- Overseas income < NT$1 million → not included in basic income, case closed
This is where most small investors land. Overseas income doesn't reach NT$1M — no additional filing needed.
Scenario B: Steady Growth US Stock Investor
- Domestic salary net income: NT$1.2 million
- Overseas US stock capital gains: NT$2 million
- Basic income = 1.2M + 2M = NT$3.2 million
- 3.2M < 7.5M → Basic tax = 0, no AMT owed
Overseas income exceeds NT$1M so you must file, but basic income doesn't exceed NT$7.5M, so the tax is zero after filing. This is why experienced investors in forums say "the effective rate above NT$7.5M is barely 3%" — because most people never reach NT$7.5M.
Scenario C: High-Net-Worth Investor
- Domestic salary net income: NT$1.5 million
- Overseas US stock capital gains: NT$8 million
- US stock dividends (30% US withholding): NT$500,000 net (pre-tax ~NT$714,000)
- Basic income = 1.5M + 8M + 0.714M = NT$10.214 million
- Basic tax = (10.214M - 7.5M) × 20% = NT$542,800
- Assume regular income tax: NT$80,000
- AMT difference = 542,800 - 80,000 = NT$462,800
- Foreign tax credit (US withholding): max credit = (542,800 - 80,000) × (8.714M ÷ 10.214M) ≈ NT$394,700
- Actual additional AMT ≈ 462,800 - 394,700 ≈ NT$68,100
See that? On-paper overseas income exceeding NT$8 million, and the actual additional AMT is about NT$68,100. This is where most people get it wrong — they think exceeding NT$7.5M means a 20% heavy tax, but after foreign tax credits, the burden is far less frightening than imagined.
Note: Dividend income must be reported at the pre-tax amount (before US withholding), not the amount you actually received. The withheld portion is what you claim as a foreign tax credit.
Three Investment Types, Three Reporting Paths
This section matters because many people treat all overseas income as one thing and apply a single set of rules. It's not. Getting it wrong can mean back taxes.
ETF Dividends (Overseas Business Income)
- Income type: Overseas business income
- Recognition date: Dividend payment date
- US withholding: 30% (claimable as foreign tax credit)
- Sub-brokerage vs overseas broker: Sub-brokerage provides withholding certificates; overseas brokers require you to compile 1042-S or account statements yourself
US Stock Capital Gains (Overseas Property Transaction Income)
- Income type: Overseas property transaction income
- Recognition date: Settlement date (T+1 or T+2), not order date
- Currency conversion: Bank of Taiwan spot rate on payment date (or year-end announced rate)
- Loss offsetting: Same type, same year only — no carryforward to next year
Offshore Fund Distributions (Overseas Business Income)
- Income type: Overseas business income
- Relationship to capital gains: Cannot offset each other. Fund distributions are business income; stock trading gains are property transaction income — different categories
- Accumulating vs distributing funds: Accumulating funds don't distribute income, deferring the realization point — a tax deferral advantage
Real penalty case: An investor offset offshore fund distribution losses (business income) against US stock capital gains (property transaction income), and was caught by the tax bureau — back taxes of nearly NT$500,000. Different income types cannot offset each other — this is an iron rule.
Sub-Brokerage vs Overseas Broker
| Sub-Brokerage | Overseas Broker (IBKR, Firstrade) | |
|---|---|---|
| Filing data | Broker provides withholding certificates | Self-compile account statements |
| CRS risk | Taiwan broker is domestic, no cross-border CRS | Depends on account location (US: low; UK: high) |
| Tax handling | Broker may assist with some filing | Entirely self-managed |
| Fees | Generally higher | Generally lower |
Four Legal Tax Strategies You Can Execute Now
Every strategy below is permitted under Taiwan law — no gray areas.
1. Spread Gains Across Years
If you have large unrealized profits, don't sell everything in one year. Keep realized gains within a range where basic income stays under NT$7.5 million, and you won't owe AMT.
Who this is for: Long-term investors with years of accumulated gains When to act: Review your year-to-date realized P&L every November-December
To be honest, keeping below NT$7.5M isn't always possible for those sitting on massive unrealized gains. But even when you exceed it, spreading realizations still reduces the marginal tax burden each year.
2. Choose Accumulating Offshore Funds
Accumulating funds reinvest income automatically instead of distributing it, deferring the income realization point. No taxable dividend income is generated until you sell.
Special note: Domestically-issued accumulating funds (Taiwan-domiciled) have their capital gains completely tax-exempt in Taiwan — different from offshore funds. This is an often-overlooked tax optimization tool.
3. Tax-Loss Harvesting Before Year-End
Taiwan's overseas property transaction losses can only offset same-year, same-type gains — no carryforward. If you have losing positions you want to use to offset other gains, you must sell before December 31.
When to act: Before year-end each December Important: Only same-type offsets work (property transaction income against property transaction income) — cannot offset against dividends (business income)
4. Claim Foreign Tax Credits
The 30% US withholding on non-resident dividends can be credited when filing Taiwan's AMT. The credit ceiling formula:
Credit limit = (Basic tax - Regular income tax) × (Overseas income ÷ Adjusted basic income)
If your basic income doesn't exceed NT$7.5M (no AMT owed), the foreign tax credit has no application. But for high-net-worth investors, it can dramatically reduce the actual burden — Scenario C above dropped from NT$462,800 to NT$68,100.
Risk Disclosure: The Real Cost of Not Filing
Many investors think, "CRS can't track me anyway, why bother?" The problem with this logic: you're not just betting against CRS — you're betting that the tax bureau will never find you through any other means.
Voluntary Correction vs Getting Caught
| Scenario | Consequence |
|---|---|
| Voluntary correction (Tax Collection Act §48-1) | Back taxes + interest (postal 1-year fixed deposit rate), no penalty |
| Filed but underreported | Back taxes + up to 2x penalty |
| Never filed, caught by authorities | Back taxes + up to 3x penalty |
The Taipei National Tax Bureau has published a case where an investor who failed to report approximately NT$15 million in overseas income was assessed about NT$1 million in back taxes plus penalties.
When You Definitely Need a CPA
- You have multiple years of unreported overseas income with significant amounts
- You hold accounts in multiple countries (especially Japan/UK/Australia) where CRS is active
- You're unsure how to calculate your cost basis (multi-year holdings, multiple purchase lots)
- You have CFC (Controlled Foreign Corporation) related income
The cost of voluntary correction (interest is typically 1-2% annually) is far lower than penalties if caught (up to 3x). If you haven't filed for several years, handling it now is the cheapest option — every year you wait adds another year of interest.
Conclusion
The biggest takeaway from putting this guide together: CRS tracks far less than you fear, and AMT costs far less than you think.
Most Taiwan overseas investors really only need to do three things:
- Check if you've crossed the NT$1 million threshold — if yes, file honestly; if no, you're done
- Know your income types — dividends, capital gains, and fund distributions are not interchangeable
- If basic income exceeds NT$7.5 million — calculate how much you actually owe after foreign tax credits; it's usually much less than expected
Filing isn't hard. What's hard is filing with wrong information. Run your own numbers against this guide, and you'll find things are simpler than online forums make them seem. When in doubt, consult a CPA — compared to a 3x penalty, the professional fee is a bargain.
FAQ
Do I need to report my IBKR US stock holdings to Taiwan's tax authority?
It depends on the amount. If your household's total overseas income reaches NT$1 million (about US$31,000) or more in a year, you must include the full amount in your basic income declaration. CRS won't automatically report your US account to Taiwan's tax bureau (Taiwan only exchanges with Japan, UK, and Australia), but reporting obligations exist regardless of whether you're being monitored.
Is Taiwan's AMT exemption NT$6.7 million or NT$7.5 million?
The current exemption is NT$7.5 million, effective from tax year 2024. NT$6.7 million was the old threshold. When calculating AMT, you subtract NT$7.5M from your total basic income (regular income + overseas income + other items), then multiply by 20%.
Do I need to report overseas income if I don't remit the money back to Taiwan?
Yes. Taiwan tax law recognizes income realization, not fund remittance. The moment you sell stocks on IBKR (settlement date), the income is realized — regardless of whether you transfer the money to a Taiwan bank account. This is the most common misconception and a major cause of back-tax penalties.
Can I offset US stock losses against dividend income?
No. Capital gains from stock trading are classified as 'overseas property transaction income,' while dividends are 'overseas business income.' Different income types cannot offset each other. Only same-type, same-year gains and losses can be netted (e.g., Stock A capital gains can offset Stock B capital losses). Investors have been hit with nearly NT$500,000 in back taxes for incorrectly cross-offsetting.
