The national average processing time for N-400 Application for Citizenship is five months. Every case is processed at a different rate based on your situation and the volume of applications your nearest filing centre receives. Due to the high volume of requests, the U.S. Citizenship and Immigration Services does not update case status by phone. The only way to track your application is online through the USCIS website.
Refer to the receipt you received in the mail after filing your citizenship application. The receipt, and any other case-application notices, has a 13-character case number printed on it that begins with the letters WAC. If you did not receive a receipt in the mail, contact the USCIS through its National Customer Service Center by calling 1-800-375-5283.
Access the USCIS website to check your status. The Check Case Status application is available on the home page of uscis.gov. Enter your 13-character receipt code in the space provided. Omit any hyphens (-) but include all letters, numbers and asterisks (*) that are included in the code.
Schedule an appointment with InfoPass to talk to an USCIS officer in person. There is no set time limit for case processing. Some cases take longer than others. If you are unsatisfied with the progress of your case or if USCIS requests more information, schedule an appointment online at infopass.uscis.gov.