how much is the fee for n400
by FreeAdvice staff. The filing fee as of 2010 for submission of the Form N-400 is $680.00. This fee includes the cost for the application ($595.00) and a biometric fee of $85.00.The biometric fee covers the expense of being fingerprinted and photographed after your application is submitted..S. Citizenship Filing Fee Exceptions. The $680.00 is the standard filing fee. However, you may qualify for exceptions. You are not required to pay the filing fee if you are submitting a request for naturalization because of your service in the military.