The general fee
Applying for naturalization with Form N-400 costs $710 filed online and $760 on paper. That is the figure you will find nearly everywhere, and in this case the sources actually agree.
The two tiers almost nobody publishes
Reduced fee of $380. If your documented household income is at or below 400% of the Federal Poverty Guidelines, you pay half. This is not an extreme-poverty exemption: 400% is a fairly high ceiling, and many people who qualify do not know it. For a single-person household, that threshold sits around $63,840 a year.
Full waiver. Applicants who meet the requirements of INA sections 328 or 329 through military service pay nothing.
The online filing trap
Here is a detail that costs money if you miss it: the reduced fee and the waiver can only be requested on paper. Neither exists as an option in the online filing flow.
So if you qualify for $380 and file online to save the $50 difference, you end up paying $710 instead of $380. The online discount is only real if you are paying the general fee.
Watch for changes
On June 23, 2026, the Department of Homeland Security published a proposed rule that would raise the N-400 fee to $1,330 on paper and $1,280 online, and would eliminate both the $380 reduced fee and the fee waiver for this form. Applicants who qualify through military service under sections 328 and 329 of the Immigration and Nationality Act would still pay nothing. It would also raise the N-336, the hearing after a denial, from $830 to $1,475.
It is a proposal, not a final rule: it has no effective date and would only apply once a final rule is published. Until then, the figures on this page are the ones in force. The public comment period closed on August 24, 2026. See the proposal in the Federal Register.
What is not included
Photos, if taken at a studio; attorney or accredited representative fees; and the cost of obtaining documents or translations. The N-400 fee is the only thing USCIS charges.