Naturalization (N-400)
Naturalization (N-400)
The most common questions about citizenship.
Naturalization (Form N-400) is for green card holders — generally after five years, or three if married to a U.S. citizen. The free N-400 early filing calculator shows your 90-day early window.
Part of the naturalization interview: an officer asks you civics questions out loud, and you answer. Our civics test guide explains which version you take. To study, the free practice tool works three ways.
Yes — the N-400 is a self-help petition here. You answer simple questions, the software puts your answers on the official form, and every field, signature, and document is checked before your packet is marked ready.
The application for naturalization — the form that takes a green card holder to citizenship. The naturalization guide walks the whole path from green card to citizenship.
The petition that fits, the forms, the documents you will need, the government fees, and the typical timeline — free, before you create an account.
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Naturalization (N-400)