The filing fee for Form N-400 is a fee required by the United States Citizenship and Immigration Services (USCIS) for individuals seeking to apply for naturalization. The filing fee covers the processing costs associated with reviewing and adjudicating the application. The current filing fee for Form N-400 is $640, plus an additional $85 biometric service fee for a total of $725. It is important to note that these fees are subject to change, so it is recommended to check the USCIS website for the most recent updates regarding filing fees. There are also certain exemptions and reduced filing fees available for certain individuals. The USCIS offers fee waivers for eligible applicants who are unable to pay the filing fee due to financial hardship. To qualify for a fee waiver, applicants must meet specific criteria outlined by the USCIS. Additionally, applicants who are 75 years of age or older are not required to pay the biometric service fee. However, they are still required to pay the base filing fee of $640. It is essential to understand that the filing fee is separate from any other costs associated with the naturalization process, such as document translations, supporting evidence, or legal representation. These additional expenses are the responsibility of the applicant and should be budgeted accordingly. In summary, the filing fee for Form N-400 is an essential aspect of the naturalization process, covering the costs of processing the application. The current fee is $640, with an additional $85 biometric service fee, totaling $725. However, fee waivers and exemptions may be available for eligible individuals. It is crucial to consult the USCIS website or seek legal advice for the most accurate and up-to-date information regarding filing fees for Form N-400.