N-400U.S. Citizenship

N-400 Timeline: How Long Does Application for Naturalization Take?

Form N-400 is the application to become a U.S. citizen through naturalization. Eligible green card holders (lawful permanent residents) file it after meeting the required years of residence, typically 5 years, or 3 years if married to a U.S. citizen.

Timing guidance

No universal GreenLight estimate. Use the official USCIS processing-time selector for the applicable field office.

Stage-by-stage breakdown

1
Application filed

USCIS receives your N-400 and mails you a receipt notice. You can track the case online with your receipt number.

Receipt timing varies; follow your USCIS account and mailed notice
2
Biometrics appointment

USCIS schedules an appointment at your local Application Support Center to collect fingerprints, photo, and signature for an updated background check.

The appointment notice controls; there is no universal filing-to-biometrics clock
3
Interview scheduled

USCIS sends a notice scheduling your naturalization interview and civics test at your local field office.

Use the official USCIS selector for the applicable field office
4
Naturalization interview & civics test

An officer reviews your application and administers the applicable English and civics tests. Your N-400 filing date controls: before Oct. 20, 2025 uses the 2008 civics test (100-question pool, up to 10 asked, 6 correct to pass); on or after Oct. 20, 2025 uses the 2025 test (128-question pool, up to 20 asked, 12 correct to pass).

The appointment notice controls the scheduled date and requirements
5
Decision

USCIS grants or continues your application. If granted at the interview, you may be scheduled for an oath ceremony the same day. If not, a notice follows.

The interview result and any later notice control; there is no universal decision clock
6
Oath of Allegiance ceremony

You attend an oath ceremony, recite the Oath of Allegiance, and receive your Certificate of Naturalization. You are now a U.S. citizen.

The oath notice controls; there is no universal interview-to-ceremony clock

Key things to know

  • 1N-400 fees differ by filing method and eligibility for a reduced fee or waiver. Age alone does not create a blanket filing-fee exemption. Verify current Form G-1055 before filing.
  • 2You must have been a lawful permanent resident (green card holder) for at least 5 years, or 3 years if you have been continuously married to and living with a U.S. citizen for those 3 years.
  • 3Continuous residence means you have not taken any trip abroad of 6+ months (or multiple shorter trips that signal you abandoned U.S. residence) during the required period.
  • 4Physical presence means you must have been physically inside the U.S. for at least half of the required period (30 months of the 5-year requirement, or 18 months of the 3-year requirement).
  • 5There is no universal oath-ceremony clock. Follow the interview result, online account, and oath notice for case-specific scheduling.
  • 6You do not need to renew your green card while N-400 is pending. Being in the naturalization process is evidence of your continued LPR status.
  • 7Certain trips abroad and criminal history can affect eligibility. Consult an immigration attorney if you have either.

Related forms

I-485: Application to Register Permanent Residence or Adjust Status →

Frequently asked questions

How long does N-400 take?
GreenLight does not publish a hand-authored N-400 range. Use the official USCIS processing-time selector for the applicable field office and follow case-specific appointment and oath notices.
What is the civics test?
Your N-400 filing date controls the test version. If you filed before Oct. 20, 2025, USCIS uses the 2008 civics test: a 100-question pool, up to 10 questions asked, and 6 correct to pass. If you filed on or after Oct. 20, 2025, USCIS uses the 2025 test: a 128-question pool, up to 20 questions asked, and 12 correct to pass. Special rules such as 65/20 may apply. Confirm your version and study materials at uscis.gov/citizenship/2025test.
What happens at the naturalization interview?
An immigration officer reviews your N-400 application, checks your documents, asks eligibility questions, and administers the applicable civics and English tests. Follow the appointment notice and current USCIS testing instructions; GreenLight does not publish a universal interview-length estimate.
Can I travel while my N-400 is pending?
Yes, but be cautious. International travel while N-400 is pending is generally allowed, and your green card remains valid. However, a trip of 6 months or more could disrupt your continuous residence requirement and complicate your application. Consult an immigration attorney before any long trip.
How do I prepare for the civics test?
First use your N-400 filing date to select the correct official materials. A filing before Oct. 20, 2025 uses the 2008 test (100-question pool; up to 10 asked; 6 correct to pass). A filing on or after Oct. 20, 2025 uses the 2025 test (128-question pool; up to 20 asked; 12 correct to pass). Download the matching USCIS materials at uscis.gov/citizenship/2025test.

Statuses to watch

When your N-400 moves through stages, you may see these status updates on my.uscis.gov. Click any to learn what it means.

Case Was Received →Fingerprints Were Taken →Interview Was Scheduled →Case Was Approved →
⏱Processing times for N-400Current USCIS estimates by service centerSee real timelinesCommunity pulse: how long cases are actually taking
Official USCIS page for N-400
Forms, instructions, and filing fees directly from USCIS.
uscis.gov →

Got a USCIS status update you don't understand? GreenLight decodes it in plain English (free).

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GreenLight is an independent tool and is NOT affiliated with USCIS, DHS, or any U.S. government agency. Nothing on this page constitutes legal advice. Timing depends on the filing category, office, notices, and case-specific facts. Always consult a licensed immigration attorney for advice specific to your situation. Verify all information at uscis.gov.