If you earn money outside the U.S. — whether in China, Canada, the UK, or any other country — your tax return just got a lot more complicated.
Many people assume: “I already paid taxes in that country. Why would I pay again in the U.S.?”
That’s where the surprises begin.
Here are three tax rules you absolutely must understand if you have foreign income.
Rule #1: The U.S. Taxes You on Worldwide Income
Unlike most countries, the United States taxes its tax residents on their global income — no matter where it was earned or where you lived during the year.
That means:
- U.S. citizens
- Green card holders
- Substantial presence residents (those who spent enough days in the U.S.)
…all must report foreign wages, foreign rental income, foreign business profits, foreign interest, and foreign dividends on their U.S. tax return.
Example: You’re a U.S. green card holder living in Shanghai, earning a salary from a Chinese company. That salary must be reported to the IRS.
💡 Key takeaway: Living abroad does not exempt you from U.S. filing requirements.
Rule #2: Foreign Tax Credit — Your Shield Against Double Taxation
Now the good news: You don’t have to pay tax twice on the same income.
The Foreign Tax Credit (FTC) , claimed using IRS Form 1116, allows you to deduct foreign income taxes paid — dollar for dollar — from your U.S. tax bill.
How it works:
- You earn $50,000 in Canada and pay $10,000 in Canadian income tax.
- On your U.S. return, you owe $12,000 on that same income.
- Apply the Foreign Tax Credit: $12,000 – $10,000 = $2,000 owed to the IRS.
Without the credit, you’d owe the full $12,000. That’s a huge difference.
Important: This only applies to income taxes (not property tax, VAT, or sales tax). And you must choose between the credit or deducting foreign taxes as an itemized deduction — the credit is almost always better.
Rule #3: Foreign Account Reporting — FBAR & FATCA
This is where many people get into serious trouble — even if they owe zero additional U.S. tax.
If you have foreign bank accounts, brokerage accounts, or certain foreign financial assets, you may need to file:
FBAR (FinCEN Form 114)
- Required if the aggregate value of your foreign financial accounts exceeds $10,000 at any time during the calendar year.
- Filed electronically with the U.S. Treasury (not with your tax return).
- Penalties for non-willful failure can be over $10,000. Willful violations can be much higher — even criminal.
FATCA (Form 8938)
- Required if your foreign financial assets exceed certain thresholds (e.g., $50,000 for single filers living in the U.S.; $200,000 for joint filers living abroad).
- Filed with your annual tax return (Form 1040).
⚠️ Common trap: Many people assume “small accounts don’t matter.” But the $10,000 FBAR threshold is aggregate — total across all accounts, anywhere in the world. If you have $6,000 in a Chinese bank and $5,000 in a Canadian account, you’re over the limit and must file.
Common scenarios — where do you fit?
🇨🇦 Canadian income + U.S. green card
You report all Canadian income on your U.S. return, claim the Foreign Tax Credit for Canadian taxes paid, and file FBAR if your Canadian accounts exceed $10,000 total.
🇨🇳 Chinese salary + U.S. tax filing
You must report your Chinese salary. If your employer withheld Chinese income tax, use Form 1116 to credit it against U.S. tax. Also check if you need to file FBAR for any Chinese bank accounts.
🌍 Foreign investments (stocks, real estate, crypto)
Foreign dividends, foreign mutual funds (PFICs), and foreign rental income all have special rules. PFICs, in particular, are notoriously complex — many tax professionals recommend avoiding them unless you have expert help.
Don’t guess. Get a tax plan tailored to your situation.
Every foreign income situation is different. The wrong assumption could cost you thousands — or trigger penalties.
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Just answer a few questions:
- Which country is your income from?
- What’s your U.S. residency status?
- Do you have foreign accounts over $10,000?
The tool will:
- Tell you which forms you need (1116, FBAR, 8938, etc.)
- Estimate your Foreign Tax Credit
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No guesswork. No double taxation. No penalties.
