Capital gains tax rules for non-resident non-citizens who own US assets

This is a really important question for expats! The US tax system treats non-resident aliens (NRAs) differently than citizens or residents. First, your tax residency status is determined by the "substantial presence test" - not by the address on your financial accounts. If you were physically present in the US for less than 31 days in the current year and don't meet other residency tests, you're generally considered a non-resident alien for tax purposes, regardless of your address on file. For NRAs, only US-source income is taxable by the US. This includes capital gains from selling US real property interests. However, most capital gains from selling stocks, bonds, and even crypto are generally NOT taxable for NRAs (with some exceptions for those who've been in the US for 183+ days in a year). You should still file a 1040-NR if you have any US-source income, even if no tax is due. And you should update your address with your financial institutions - while some may have restrictions, most major brokerages have procedures for non-US clients.

After dealing with similar confusion about my investments when I moved abroad, I tried several tax advisors who gave conflicting advice. Finally found https://taxr.ai which specifically helped clarify my non-resident alien tax situation with US investments. They analyzed my specific scenario with investments in both countries and explained exactly which forms I needed and which capital gains were taxable where. Their document analysis pointed out that I needed to look at Section 871(a)(2) of the tax code for the 183-day rule that affects capital gains taxation for non-residents. Without their help, I would have reported incorrectly and probably paid thousands in unnecessary taxes or risked penalties for underreporting.

Just wanted to follow up about my experience with taxr.ai since I ended up trying it despite my initial skepticism. Their system caught that I qualified for something called the "tie-breaker rules" under the tax treaty with my new country (Australia). This saved me from double taxation on some investments I was planning to sell. The document analysis also highlighted that I needed to file FBAR forms for my foreign accounts that exceeded $10,000 - something I had no idea about and might have missed. I'm really glad I checked it out because the penalties for not filing those forms can be steep. Ended up much better than the generic advice I was getting elsewhere!

I had a similar issue last year and spent WEEKS trying to get someone at the IRS to clarify my situation as a former H1B visa holder with US investments. Literally could not get through on the phone - either busy signals or disconnected after hours on hold. Finally used https://claimyr.com to get a callback from the IRS within about 2 hours. You can see how it works here: https://youtu.be/_kiP6q8DX5c. The IRS agent I spoke with confirmed that as a non-resident alien, I'm only taxed on US-source income (which does NOT include most capital gains on stocks and crypto for NRAs), and helped me understand the exact forms I needed to file. Getting actual confirmation directly from the IRS gave me so much more confidence than just reading online opinions.

I take back what I said! After dealing with endless frustration trying to reach the IRS myself, I tried Claimyr out of desperation. Got a call from an actual IRS agent within 90 minutes who cleared up my confusion about Form 1040-NR vs 1040. The agent confirmed I needed to file a dual-status return for the year I left the US, treating part of the year as a resident and part as non-resident. They also explained I needed to file Form 8833 to claim treaty benefits for certain income. Would've had no idea without speaking directly to them. Definitely worth it just for the peace of mind of knowing I'm filing correctly.

Just wanted to add that you ABSOLUTELY need to change your address with your financial institutions. I stayed with my US address for almost a year after moving overseas and my brokerage eventually found out and temporarily froze my account until I provided proper documentation. Also, if you have more than $10,000 total across all foreign financial accounts at any point during the year, you need to file an FBAR (FinCEN Form 114). The penalties for not filing this are HUGE - like $10,000+ for non-willful violations.

Just a heads up that if you're from a country that has a tax treaty with the US, your situation might be different. I'm now in the UK and our tax treaty reduces the withholding on US dividends from 30% to 15%. Also, be aware you might have tax obligations in your new country for your US investments. For example, even if the US doesn't tax your capital gains as an NRA, your new home country probably will!

I went through almost exactly this situation when I moved back to India after my H1B expired. The key thing that helped me was understanding that your tax residency status is based on physical presence, not where your accounts are registered. Since you've only been gone a few months, you'll likely need to file a "dual-status" return for this tax year - treating part of the year as a US resident (when you were physically here) and part as a non-resident alien. This means different tax rules apply to income earned during each period. For your investments, here's what I learned: As an NRA, you generally won't owe US capital gains tax on stock/crypto sales (unless you hit that 183-day presence test), but you WILL still owe the 30% withholding on any US dividends. Your brokerage should handle the dividend withholding automatically. Regarding the address issue - I was terrified to update mine too, but most major brokerages like Charles Schwab and Fidelity actually have good processes for this. You'll need to fill out a W-8BEN form and provide some documentation, but they're used to dealing with people in your situation. The key is being proactive about it rather than waiting for them to discover it through IP tracking. Also, don't forget about potential tax obligations in your home country! Many countries will tax you on worldwide income once you become a resident there, which could include gains from your US investments.