I-485 vs N-400
Side-by-side comparison of USCIS processing times for I-485 and N-400.
I-485 →
Processing Time Range
6.5 months to 70.5 monthsOffices92
Fastest OfficeSt. Albans Field Office (6.5 months to 10.5 months)
Slowest OfficeService Center Operations Directorate (43.5 months to 47.5 months)
N-400 →
Processing Time Range
8 months to 26 monthsOffices90
Fastest OfficeCincinnati Field Office (8 months to 11.5 months)
Slowest OfficeLawrence Field Office (17.5 months to 19.5 months)
Frequently Asked Questions
Which is faster, I-485 or N-400?
I-485 currently takes 6.5 months to 70.5 months while N-400 takes 8 months to 26 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 2026-09-08 from USCIS.
Source: WaitVisa.com — USCIS, updated 2026-09-08