Most H-1B workers never hear about Selective Service. Then they get a green card at 24, and a question appears years later on the citizenship application: did you register?
As of November 2, 2026, here's who has to register, and what happens if you didn't.
- Men must generally register within 30 days of turning 18 and not after turning 26.
- Every male person residing in the US aged 18 to 26 has the duty, with an exception for nonimmigrants.
- Nonimmigrants are exempt while they continue to maintain lawful nonimmigrant status.
- USCIS transmits data to Selective Service for male adjustment applicants aged 18 to 26.
- USCIS denies naturalization for knowing and willful failure to register during the statutory period.
- Applicants over 31 are eligible even if they failed to register, because it's outside the statutory period.
Who has to register?
Almost every young man living in the US, including green card holders. The law says it is "the duty of every male citizen of the United States, and every other male person residing in the United States," who is "between the ages of eighteen and twenty-six," to register (50 U.S.C. 3802, Cornell LII).
Selective Service puts it simply: "Federal law requires nearly all male U.S. citizens and male immigrants to register at age 18," and "if you are 26 or older, it's too late to register" (Selective Service System).
Are H-1B, H-4 and F-1 holders exempt?
Yes, while in status. The same law says registration "shall not be applicable to any alien lawfully admitted to the United States as a nonimmigrant" under the visa categories, "for so long as he continues to maintain a lawful nonimmigrant status in the United States" (50 U.S.C. 3802).
USCIS's Policy Manual lists those not required to register, including "males who did not live in the United States between the ages of 18 and 26 years" and "males who lived in the United States between the ages of 18 and 26 years but who maintained lawful nonimmigrant status for the entire period" (USCIS Policy Manual, Vol. 12, Part D, Ch. 7).
| Your situation | Must register? |
|---|---|
| Green card holder aged 18 to 25 living in the US | Yes |
| H-1B, H-4, L-1 or F-1 in lawful status | No, while in status |
| Got a green card before turning 26 | Yes, from then until 26 |
| Got a green card at 26 or older | No, too late to register |
Does USCIS register you automatically?
It helps. USCIS says it "assists with the registration process by transmitting the appropriate data to the Selective Service System (SSS) for male applicants between the ages of 18 and 26 who apply for adjustment of status," and that Selective Service "will send an acknowledgement to the applicant that can be used as his official proof of Selective Service registration" (USCIS Policy Manual, Vol. 12, Part D, Ch. 7).
Don't assume it worked. Keep the acknowledgment, and if you never got one, verify online before you turn 26.
Why does it matter for citizenship?
Because failing to register can block naturalization. USCIS "will deny a naturalization application when the applicant refuses to register with Selective Service or has knowingly and willfully failed to register during the statutory period." It also notes that "failure on the part of USCIS or SSS to complete the process on behalf of the applicant, however, will not constitute a willful failure to register on the part of the applicant."
- Under 26: "The applicant is generally ineligible."
- 26 to 31: "The applicant may be ineligible," but USCIS "will allow the applicant an opportunity to show that he did not knowingly or willfully fail to register, or that he was not required to do so."
- Over 31: "The applicant is eligible. This is the case even if the applicant knowingly and willfully failed to register."
The officer may ask for "a status information letter," which "will indicate whether a requirement to register existed." Our guide to naturalization after an employment green card covers the rest of the citizenship requirements, and our guide to naturalization changes in 2026 covers what's new.
Does registering mean military service?
No. Selective Service says "registration is not the same as enlisting with the U.S. Armed Forces" and "there is no draft." In a national emergency, the registry would be used "if authorized by the President and Congress" (Selective Service System). Our guide to federal jobs and military service for green card holders covers enlisting.
What this means for you
- If you got a green card before 26 and you're a man, register.
- Time in lawful nonimmigrant status doesn't count against you.
- Keep proof, even if USCIS sent your data.
- Missing it can affect citizenship, depending on your age when you apply.
- Registration isn't enlistment.
Where to start
Selective Service is one of many small rules on the road from green card to citizenship. Our free evaluation at /evaluate/ checks whether EB-1A or the NIW fits your profile, and Frank, our AI assistant at /frank, helps you build the evidence. Petitions are reviewed and filed by our partner law firm, Lai & Turner. Our guide to what happens after I-485 approval covers your first steps as a permanent resident.
Sources
All checked November 2, 2026.
- 50 U.S.C. 3802 (Cornell LII). Who must register; nonimmigrant exception.
- USCIS Policy Manual, Vol. 12, Part D, Ch. 7. Registration through adjustment; naturalization effects by age; who isn't required.
- Selective Service System. Registration ages; no draft.
Frequently asked questions
Do green card holders have to register for Selective Service?
Generally yes, if they are men living in the United States between 18 and 26. The law places the duty on every male citizen and every other male person residing in the US in that age range. The only exception relevant here is for nonimmigrants who maintain lawful nonimmigrant status, which ends when you become a permanent resident.
I was on H-1B until 25. Did I need to register?
Not while you were in lawful nonimmigrant status. The law says registration doesn't apply to nonimmigrants for as long as they maintain that status. If you became a permanent resident before turning 26, the duty started then. USCIS's manual lists males who maintained lawful nonimmigrant status for the entire 18 to 26 period as not required to register.
Does USCIS register me automatically when I get a green card?
USCIS says it assists by transmitting data to Selective Service for male applicants between 18 and 26 who apply for adjustment of status, and Selective Service then sends an acknowledgment that can serve as proof. Keep that letter. If you never got one, verify your registration on the Selective Service website before you turn 26.
What if I didn't register and I'm applying for citizenship?
It depends on your age. USCIS's Policy Manual says applicants under 26 are generally ineligible, those between 26 and 31 may be ineligible but can show the failure wasn't knowing or willful, and those over 31 are eligible even if they failed to register. A status information letter from Selective Service helps show whether you had to register.
Does registering mean I'll be drafted?
No. Selective Service says registration is not the same as enlisting in the Armed Forces and that there is no draft. Registration keeps a list that would be used in a national emergency if authorized by the President and Congress. For immigrants, the practical stakes are eligibility for citizenship and some benefits.
Green Card Guide AI is not a law firm and this article is not legal advice. It describes evidence-building strategy in general terms; your attorney determines what belongs in your petition and how it's argued.
