Green card holders applying for U.S. citizenship — usually after 5 years as a resident, or 3 if married to a U.S. citizen.

Filed with USCIS. Expect a biometrics appointment, then the civics and English test and interview, then the oath ceremony.

What WhyFill does for you

The N-400 is long and asks for 5 years of addresses, jobs, and trips. Your WhyFill profile carries all of it between forms so you answer once.

U.S. Citizenship and Immigration Services

N-400: Application for Naturalization

CitizenshipGovernment filing fee: $760Official source

What this form is for

These USCIS forms cover naturalization and proof of citizenship. The forms and instructions are free at uscis.gov. Most forms in this group have a filing fee set by the agency.

About this form

Who it is for: Green card holders applying for U.S. citizenship — usually after 5 years as a resident, or 3 if married to a U.S. citizen.
How filing works: Filed with USCIS. Expect a biometrics appointment, then the civics and English test and interview, then the oath ceremony.
What WhyFill does for you: The N-400 is long and asks for 5 years of addresses, jobs, and trips. Your WhyFill profile carries all of it between forms so you answer once.

What you get with WhyFill

We're still building this form. When it's ready, your WhyFill fee covers:

The official form, filled in with your answers
A guided interview in English, Spanish, or Chinese
A free watermarked preview you check before paying
A filing checklist: where to file, what to include, what it costs

The government side

Government filing fee: $760

You pay any government filing fee directly to the agency, never to us.

The blank form and the official instructions are free at the agency's website.

You review, sign, and file the completed form yourself.

Get it free at the agency site

This form is in these packs

U.S. Citizenship