Naturalization is one of the few immigration benefits with a statutory clock. If USCIS has not decided an N-400 within 120 days after the interview, the applicant does not need mandamus: Congress created a direct route to federal court in 8 U.S.C. § 1447(b).
Quick Facts
- Trigger: no decision 120 days after the naturalization examination
- Court: the district court where the applicant resides
- Relief: the court decides the application or remands it with instructions
- Before the interview: no § 1447(b); delay claims use mandamus or the APA
- After a denial: Form N-336 hearing, then de novo review under § 1421(c)
What § 1447(b) says
If USCIS fails to make a determination before the end of the 120-day period after the date of the examination, the applicant may apply to the United States district court for the district in which the applicant resides. The court has jurisdiction over the matter and may either determine it or remand it to the agency with appropriate instructions (8 U.S.C. § 1447(b)).
When the 120 days start
The clock runs from the naturalization interview, not from the end of background checks or other internal steps. The Fifth Circuit rejected the argument that the “examination” is the whole investigative process (Walji v. Gonzales, 500 F.3d 432 (5th Cir. 2007)).
What happens once the case is filed
The Ninth Circuit, sitting en banc, held that a properly filed § 1447(b) case gives the district court exclusive jurisdiction, so USCIS cannot decide the application on its own while the case is pending (United States v. Hovsepian, 359 F.3d 1144 (9th Cir. 2004) (en banc)). In practice, many cases end with a remand: the parties ask the court to send the case back with an instruction to decide it by a set date, and the applicant is often scheduled for the oath soon after an approval.
Delay before the interview
Section 1447(b) applies only after the examination. An N-400 that has not reached an interview is an ordinary delay case under the mandamus statute and the APA, judged under the TRAC factors. That is the gap covered by naturalization delays that arise before the interview.
After a denial
A denied applicant may request an administrative hearing before a different officer on Form N-336 (8 U.S.C. § 1447(a)). If the denial is affirmed, the applicant may seek review in federal district court, which reviews the application de novo and makes its own findings of fact and conclusions of law (8 U.S.C. § 1421(c)). The petition must be filed within 120 days after the final administrative decision (8 C.F.R. § 336.9(b)).