N-400 or N-600?
Understanding the difference between Form N-400 and Form N-600 when applying with the USCIS is key to choosing the right path toward U.S. citizenship—or getting proof of the citizenship you already have.
Side by Side, Quick Comparison
|
|
Form N-400 |
Form N-600 |
|---|---|---|
|
Grants Citizenship? |
Yes — if approved, you become a U.S. citizen |
No — you must already be a citizen; this form provides proof |
|
Purpose |
To apply for U.S. citizenship through naturalization |
To request a Certificate of Citizenship if you already became a citizen through your parents |
|
Who Should File |
Green card holders (lawful permanent residents) |
People who were born to or adopted by U.S. citizen parents |
|
Age Requirement |
Must be 18 or older |
Usually for children under 18, but adults can apply if eligible |
|
Process Includes |
English and civics test, interview, Oath of Allegiance |
No test; just documentation. Biometrics, interview, and Oat may apply. |
|
Result |
Certificate of Naturalization |
Certificate of Citizenship |
|
Application Fee |
$760 for paper filing, or $710 for online filing (If filing by paper, see if you qualify for a reduced or waived fee.) |
$1,385 for paper filing or $1,335 for online filing (Check the USCIS Fee Schedule, or read about fee waivers.) |
When to Use Each Form
Use Form N-400 if:
- You have a green card (permanent resident status)
- You want to become a U.S. citizen
- You meet the residency and moral character requirements
- Review your eligibility here
Use Form N-600 if:
- You were born outside the U.S. to U.S. citizen parents
- You became a citizen automatically through your parents
- You need official proof of your citizenship
- Learn more about the N-600 here
