I-485 vs N-400
Side-by-side comparison of USCIS processing times for I-485 and N-400.
I-485 →
Processing Time Range
5 months to 51 monthsOffices92
Fastest OfficeSt. Albans Field Office (5 months to 11 months)
Slowest OfficeService Center Operations Directorate (43.5 months to 46 months)
N-400 →
Processing Time Range
6 months to 18 monthsOffices90
Fastest OfficeHialeah Field Office (6 months to 8 months)
Slowest OfficeLawrence Field Office (16.5 months to 18 months)
Frequently Asked Questions
Which is faster, I-485 or N-400?
I-485 currently takes 5 months to 51 months while N-400 takes 6 months to 18 months. I-485 generally processes faster.
How many offices process I-485 vs N-400?
I-485 is processed at 92 offices, while N-400 is processed at 90 offices.
When was this comparison last updated?
This data was last updated on 2026-06-05 from USCIS.
Source: WaitVisa.com — USCIS, updated 2026-06-05