“As an F1 student earning income from an assistantship, what am I legally allowed to do in terms of investing in the stock market to maintain my status?”
Ordinary personal investing is manageable: dividends or gains from your own brokerage account do not by themselves show that you performed service or labor for an employer. Protect your status by keeping the account personal, keeping any business or client activity separate unless authorized, and making sure the assistantship itself follows F-1 work limits.
Your status-safe route depends on whether you are investing only your own money or performing work as a business or for someone else.
You may buy, hold, and sell stocks or securities for your —your money and your risk, with no client or customer. Immigration rules define employment as service or labor for an employer, while the tax regulation separately excludes own-account securities transactions and says transaction volume is not considered (8 CFR 274a.1(h); 26 CFR 1.864-2(c)(2)).
If you want to create and work in a trading, advisory, or investment business, first obtain applicable OPT and keep the business directly related to your program of study. DHS says starting your own business constitutes work and requires OPT (Study in the States, International Students and Entrepreneurship).
Your assistantship authorization does not authorize a second job managing another person's money, selling research or advice, taking trading fees, or operating a separate business. Those activities are service, labor, or business work and would be unless separately authorized (USCIS Policy Manual Vol. 7, Part B, Ch. 6).
The own-account conclusion comes from the immigration definition of employment plus a separate tax rule; the tax rule does not control F-1 status.
These steps keep your investing separate from employment and put the account on the correct tax track.
Before relying on the income
Confirm the assistantship fits your F-1 authorization
If the job is on school premises—or at a qualifying educationally affiliated location and integral to the educational program—treat it as on-campus employment and keep the total at no more than 20 hours per week while school is in session; full-time on-campus work is allowed when school is not in session or during annual vacation. If it is off campus, do not work unless the required category-specific authorization was granted before the work began.
Requirements
Before the first trade
Keep the brokerage activity strictly personal
Buy, hold, or sell only for your own account. Do not accept customers, pool or manage another person's money, receive fees or commissions, sell recommendations or research, or form and work in a trading or advisory business under assistantship permission. If you want to work in your own business, obtain qualifying OPT first and keep that business directly related to your program of study.
Requirements
When opening or updating the account
Give the broker the correct tax form
If you remain a for tax purposes, give Form W-8BEN to the broker—not the IRS—and file Form 8843 for each year in which you exclude student days. If you are a for tax purposes, give the requester Form W-9 instead. More than five calendar years of exempt F/J/M/Q presence can end the ordinary student-day exclusion unless you satisfy the IRS exception stated in its student guidance.
Requirements
After the tax year ends
Report the investment income on the annual return
If you are a nonresident employee with assistantship wages subject to U.S. withholding, file Form 1040-NR by the 15th day of the fourth month after year-end—April 15, 2027 for calendar-year 2026—and attach or file Form 8843 as applicable. Report qualifying U.S.-source capital gains subject to the special 183-day rule on Schedule NEC; dividends are generally taxed at 30% unless a treaty lowers the rate. If you are a resident alien, file Form 1040 and report worldwide income.
Requirements
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The answer rests on current DHS/USCIS regulations and guidance, Treasury regulations, and IRS forms and tax guidance.
8 CFR 274a.1(h)
This is the federal immigration definition used to distinguish employment from investing one's own property.
(h)
The term employment means any service or labor performed by an employee for an employer within the United States, including service or labor performed on a vessel or aircraft that has arrived in the United States and has been inspected, or otherwise included within the provisions of the Anti-Reflagging Act codified at 46 U.S.C. 8704, but not including duties performed by nonimmigrant crewmen defined in sections 101(a)(10) and (a)(15)(D) of the Act.
26 CFR 1.864-2(c)(2)
For federal tax purposes, own-account stock or securities trading is excluded from a nonresident's U.S. trade or business, and volume alone does not change that treatment; dealers are a separate category.
(c)(2)(i), (iii)
The term ‘engaged in trade or business within the United States’ does not include the effecting of transactions in the United States in stocks or securities for the taxpayer's own account, irrespective of whether such transactions are effected by or through— The volume of stock of security transactions effected during the taxable year shall not be taken into account in determining under this subparagraph whether the taxpayer is engaged in trade or business within the United States.
DHS Study in the States — International Students and Entrepreneurship
An F-1 student must use qualifying, program-related OPT before working in the student's own business.
Because starting your own business constitutes work, while in F-1 status a student must qualify and apply for optional practical training (OPT) if they plan to do so. OPT, and thus the business, must relate to a student’s program of study and can occur either before (pre-completion OPT) or after the completion of a program of study (post-completion OPT).
8 CFR 214.2(f)(9)(i)
This sets the ordinary weekly limit and vacation exception for qualifying on-campus assistantship work.
(f)(9)(i)
Employment authorized under this paragraph (f)(9)(i) must not exceed 20 hours a week while school is in session, unless the Secretary suspends the applicability of this limitation due to emergent circumstances, as determined by the Secretary, by means of notice in the Federal Register, the student demonstrates to the DSO that the employment is necessary to avoid severe economic hardship resulting from the emergent circumstances, and the DSO notates the Form I-20 or successor form in accordance with the Federal Register document. An F-1 student may, however, work on campus full-time when school is not in session or during the annual vacation.
USCIS Students and Employment
Off-campus training work cannot begin first and be authorized later.
For both F-1 and M-1 students any off-campus training employment must be related to their area of study and must be authorized prior to starting any work by the Designated School Official (the person authorized to maintain the Student and Exchange Visitor Information System (SEVIS)) and USCIS.
8 CFR 214.2(f)(6)(iii)
Maintaining the required course load remains necessary regardless of investment activity.
(f)(6)(iii)
A student who drops below a full course of study without the prior approval of the DSO will be considered out of status.
IRS Exempt Individual — Who Is a Student
This provides the F-1 student exception to counting presence days, its five-calendar-year limit, and the Form 8843 requirement.
You will not be an exempt individual as a student if you have been exempt as a teacher, trainee, student, Exchange Visitor, or Cultural Exchange Visitor on an F, J, M, or Q visa for any part of more than 5 calendar years, unless you establish to the satisfaction of the IRS that you do not intend to reside permanently in the United States, and you have substantially complied with the requirements of your nonimmigrant status. If you qualify to exclude days of presence as a student, you must file a fully-completed Form 8843, Statement for Exempt Individuals and Individuals with a Medical Condition with the IRS.
IRS Taxation of Nonresident Aliens
Nonresident-alien dividends are generally subject to a 30% rate unless a treaty lowers it.
FDAP income is taxed at a flat 30 percent (or lower treaty rate, if qualify) and no deductions are allowed against such income.
IRS Taxation of Capital Gains of Nonresident Students
This is the special capital-gains rule that can apply to a nonresident F-1 student; it is separate from the substantial-presence calculation.
A flat tax of 30 percent (or lower treaty) rate is imposed on U.S. source capital gains in the hands of nonresident individuals present in the United States for 183 days or more during the taxable year. This 183-day rule bears no relation to the 183-day rule under the substantial presence test of IRC section 7701(b)(3).
IRS Taxation of U.S. Residents
Once the student is a U.S. resident for tax purposes, worldwide investment income is reported like a U.S. citizen's income.
U.S. residents are generally taxed in the same way as U.S. citizens. This means that their worldwide income is subject to U.S. tax and must be reported on their U.S. tax return.
Form W-8BEN (Rev. October 2021)
A foreign beneficial owner gives Form W-8BEN to the broker or payer, not directly to the IRS.
page 1
Give this form to the withholding agent or payer. Do not send to the IRS.
Instructions for the Requester of Form W-9
A resident alien is a U.S. person for Form W-9 purposes.
Use Form W-9 to request the taxpayer identification number (TIN) of a U.S. person (including a resident alien) and to request certain certifications and claims for exemption.
2025 Instructions for Form 1040-NR
This supplies the filing-deadline formula for a nonresident employee with wages subject to withholding.
page 12
If you were an employee and received wages subject to U.S. income tax withholding, file Form 1040-NR by the 15th day of the 4th month after your tax year ends. A return for the 2025 calendar year is due by April 15, 2026.
These are the official rules as published or current on the cited dates; immigration and tax rules can change.
This is general information about official processes, not legal advice, and SettleKit is not a law firm.
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