Form N-400 Processing Time 2026
Application for Naturalization (US Citizenship)
The N-400 is the application for US citizenship through naturalization for eligible green card holders.
GreenLight does not publish an unsourced national N-400 range. Use the official USCIS selector for the applicable field office.
Processing time by service center
| Service Center | Receipt Prefix | Typical Range | |
|---|---|---|---|
| CSC | WAC | Official tool required | Details → |
| VSC | EAC | Official tool required | Details → |
| NSC | LIN | Official tool required | Details → |
| TSC | SRC | Official tool required | Details → |
| NBC | MSC | Official tool required | Details → |
| PSC | YSC | Official tool required | Details → |
* GreenLight does not apply national aggregates to individual service centers. Exact times vary by case type, category, and workload. Check egov.uscis.gov/processing-times for your specific case.
How to check your Form N-400 case status
- Find your receipt number on Form I-797C (Notice of Action). It starts with 3 letters (WAC, EAC, LIN, SRC, MSC, or IOE) followed by numbers.
- Visit my.uscis.gov and enter your receipt number in the case status tool.
- Got a confusing status message? Paste it into GreenLight's decoder for a plain-English explanation.
- Check the official processing times at egov.uscis.gov/processing-times to see if your case is outside normal time.
Frequently asked questions
Related forms
Got a USCIS status update on your Form N-400? Paste it in and we'll explain what it means in plain English.
Decode your status message →GreenLight is an independent tool and is NOT affiliated with USCIS, DHS, or any US government agency. Nothing on this page constitutes legal advice. Always verify at my.uscis.gov.