I-485 vs N-400
Side-by-side comparison of USCIS processing times for I-485 and N-400.
I-485 →
Processing Time Range
8.5 months to 60.5 monthsOffices92
Fastest OfficeSt. Albans Field Office (8.5 months to 12.5 months)
Slowest OfficeService Center Operations Directorate (43.5 months to 47.5 months)
N-400 →
Processing Time Range
9 months to 31.5 monthsOffices90
Fastest OfficeNew Jersey Field Office (9 months to 12 months)
Slowest OfficeLawrence Field Office (18 months to 20 months)
Frequently Asked Questions
Which is faster, I-485 or N-400?
I-485 currently takes 8.5 months to 60.5 months while N-400 takes 9 months to 31.5 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 2026-10-23 from USCIS.
Source: WaitVisa.com — USCIS, updated 2026-10-23