I-485 vs N-400
Side-by-side comparison of USCIS processing times for I-485 and N-400.
I-485 →
Processing Time Range
7.5 months to 51.5 monthsOffices92
Fastest OfficeBoston Field Office (7.5 months to 17 months)
Slowest OfficeService Center Operations Directorate (42 months to 44 months)
N-400 →
Processing Time Range
5.5 months to 16.5 monthsOffices90
Fastest OfficeHialeah Field Office (5.5 months to 7.5 months)
Slowest OfficeLawrence Field Office (15 months to 16.5 months)
Frequently Asked Questions
Which is faster, I-485 or N-400?
I-485 currently takes 7.5 months to 51.5 months while N-400 takes 5.5 months to 16.5 months. N-400 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 2026-04-11 from USCIS.
Source: WaitVisa.com — USCIS, updated 2026-04-11