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 months to 75.5 monthsOffices92
Fastest OfficeHelena Field Office (6 months to 11.5 months)
Slowest OfficeService Center Operations Directorate (43.5 months to 47 months)
N-400 →
Processing Time Range
7 months to 20.5 monthsOffices90
Fastest OfficeCharlotte Field Office (7 months to 8.5 months)
Slowest OfficeLawrence Field Office (17 months to 18.5 months)
Frequently Asked Questions
Which is faster, I-485 or N-400?
I-485 currently takes 6 months to 75.5 months while N-400 takes 7 months to 20.5 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 2026-07-22 from USCIS.
Source: WaitVisa.com — USCIS, updated 2026-07-22