Naturalization (N-400) Processing Time: How Long Does N-400 Take?

At 390 days (roughly 13 months — well over a year) on average, N-400 is among the longest-waiting USCIS form types. Multi-year processing usually reflects per-country quotas under the Immigration and Nationality Act, severe receipt-vs-completion imbalances at adjudicating service centers, or stacked dependencies on prior petitions. Applicants in this band should treat the published processing time as a minimum, not an estimate, and plan major life decisions accordingly.

Application for U.S. citizenship by eligible permanent residents who meet residency and other requirements. The official adjudicator is U.S. Citizenship and Immigration Services (USCIS). Status updates and receipt-number lookups are available on the USCIS case status portal.

Among the 8 USCIS form types tracked here, N-400 ranks #4 for processing speed (1 = fastest). The fastest tracked form is I-94 at 30 days; the slowest is I-589 at 730 days — a spread of 700 days, or more than 23 months of difference between the easiest and hardest paths through USCIS.

N-400's 91% approval rate runs 18 percentage points above the cross-form average of 73% across the categories tracked here — a meaningful tilt toward approval. N-400 carries a 91% approval rate, putting it among the highest-approval USCIS form types. A rate this high signals well-defined eligibility criteria and limited discretionary review — most denials trace to incomplete filings or missing evidence rather than substantive ineligibility. Applicants who file a complete package with the correct fee and supporting documents are very likely to receive an approval.

For peer context, the fastest-moving tracked form is Nonimmigrant Admission at 30 days, while the slowest is Asylum (I-589) at 730 days. N-400's 390-day average sits on the slower side of that range.

Filing volume for N-400 has been increasing in recent USCIS reporting periods. Rising receipts without a matching rise in adjudicator capacity is the single most common cause of growing backlogs — and is the dynamic the agency cites most often when explaining processing-time slippage in its quarterly performance reports.

USCIS publishes form-type performance data quarterly. The current dataset reflects fiscal year 2023 adjudication, covering 2.1M total applications across 198 countries and 63 field offices. The agency-wide average approval rate across all tracked forms is 82%, which is the benchmark used for the comparisons on this page.

N-400's approval rate is high enough that a complete, on-time filing with correct supporting documents is the dominant factor. Applicants should focus first on ensuring every required exhibit is included and every signature is correct — clerical issues are a leading cause of denials and Requests for Evidence (RFEs) even in high-approval categories. With multi-year average waits, applicants and sponsors must build life and staffing plans around the realistic timeline, not the published minimum. Maintaining underlying status (current visa, employment authorization, advance parole) throughout the wait is critical — many denials in long-wait categories stem from gaps in derivative status while the principal filing is pending.

Applicants and employer sponsors should also monitor policy changes from USCIS and, where relevant, the U.S. Department of Labor and the U.S. Department of State. Each agency owns a different stage of the immigration pipeline, and a delay at one — for example, a stalled labor certification at DOL — can cascade into the others. The Department of Homeland Security publishes the annual Yearbook of Immigration Statistics, which provides historical baselines this dataset cross-checks against.