Quick Answer: How Does the Naturalization Process Work?
The naturalization process is how eligible noncitizens become U.S. citizens. For many lawful permanent residents, it begins with confirming eligibility and filing Form N-400, Application for Naturalization, with USCIS.
After USCIS accepts the application, it may require biometrics before scheduling a naturalization interview. Most applicants must also complete English and civics tests unless an exception applies.
USCIS then decides the Form N-400 application. If approved, the applicant must attend a naturalization ceremony and take the Oath of Allegiance. Citizenship begins after taking the Oath, and the new U.S. citizen receives a Certificate of Naturalization.
What Is Naturalization?
Naturalization is the legal process through which an eligible noncitizen becomes a U.S. citizen. U.S. Citizenship and Immigration Services (USCIS) handles naturalization applications, and most applicants use Form N-400, Application for Naturalization, to apply.
Naturalization is different from citizenship acquired automatically through birth or through a U.S. citizen parent. A person who already acquired or derived U.S. citizenship generally does not need to use Form N-400 to naturalize.
The requirements for naturalization depend on the applicant’s eligibility category and circumstances. If you are unsure how citizenship applies to your situation, see our guide to the ways to become a U.S. citizen.
Who Can Apply for Naturalization?
You may be able to apply for naturalization if you are at least 18 years old and meet the requirements for your eligibility category. Many applicants qualify under the general five-year permanent resident route, while certain spouses of U.S. citizens may qualify under a three-year route.
Five-Year Permanent Resident Route
Under the general rule, you must have been a lawful permanent resident for at least five years. You generally must also maintain continuous residence in the United States, be physically present for at least 30 months during those five years, and live for at least three months in the state or USCIS district where you apply.
You must also show good moral character and attachment to the principles of the U.S. Constitution. You must meet the English and civics requirements unless you qualify for an exception.
Three-Year Route for Certain Spouses of U.S. Citizens
Some permanent residents may qualify after three years if they are married to a U.S. citizen and meet the additional marriage requirements. They generally need three years of continuous residence and at least 18 months of physical presence.
Different rules can apply to military members and applicants using other naturalization provisions. See our U.S. citizenship eligibility requirements guide for the complete rules and exceptions.
Ready to Prepare Form N-400?
If you believe you meet the naturalization requirements, ImmigrationDirect can help you prepare Form N-400 online with guided questions based on the information you provide.
What Are the Steps in the Naturalization Process?
The naturalization process generally starts with confirming that you qualify for U.S. citizenship and ends when you take the Oath of Allegiance. For most applicants, the process involves filing Form N-400, completing any required biometrics, attending a naturalization interview and tests, receiving a USCIS decision, and attending the oath ceremony.
Step 1. Check Your Naturalization Eligibility
Before filing Form N-400, confirm that you meet the requirements for the naturalization category you plan to use. This includes checking how long you have been a lawful permanent resident and whether you meet the applicable continuous residence and physical presence requirements.
Your eligibility can also depend on your travel history, good moral character, marriage history, and other circumstances. Review our U.S. citizenship eligibility requirements guide if you need a detailed explanation before starting Form N-400.
Step 2. Prepare and File Form N-400
Eligible applicants generally request naturalization by filing Form N-400, Application for Naturalization, with USCIS. Depending on your circumstances, you may be able to file online or submit a paper application by mail.
Complete the form carefully and include the supporting evidence and USCIS filing fee that apply to your case. Reduced-fee or fee-waiver requests have separate filing requirements. Keep a complete copy of your application and supporting documents for your records.
See our Form N-400 guide for filing options, instructions, fees, documents, and where to file.
Step 3. Receive Your USCIS Receipt Notice and Track Your Case
After USCIS accepts Form N-400, you will receive a receipt notice with a receipt number. Keep this notice because the receipt number identifies your case and can be used to follow its progress.
You can use USCIS Case Status Online to check for updates. USCIS may also send notices requesting additional information or scheduling the next step in your naturalization process.
Step 4. Attend a Biometrics Appointment if USCIS Requires One
Not every naturalization applicant needs to attend a new biometrics appointment. USCIS will send you an appointment notice if it needs your fingerprints, photograph, signature, or other biometric information.
USCIS uses biometrics to verify your identity and conduct required background and security checks. Follow the date, time, location, and instructions on the notice. See our biometrics appointment guide for more information about what to expect.
Step 5. Attend the Naturalization Interview
USCIS will schedule you for a naturalization interview. During the interview, a USCIS officer reviews your Form N-400, asks questions about your application and background, and determines whether you meet the requirements for naturalization.
Before the appointment, review the copy of Form N-400 you submitted and be prepared to explain or correct information if necessary. Bring your interview notice and any documents USCIS asks you to provide.
See our naturalization interview guide for detailed preparation and interview-day information.
Step 6. Complete the English and Civics Tests
Unless an exception applies, you must complete English and civics testing as part of the naturalization process. The English test covers speaking, reading, and writing. The civics test covers U.S. government and history.
The version of the civics test you take depends on when you filed Form N-400. Applicants who filed on or after October 20, 2025, generally take the 2025 civics test, while earlier filings generally remain subject to the 2008 test.
See our U.S. citizenship test guide for the current test format and preparation requirements.
Step 7. Receive the USCIS Decision
After the interview and required testing, USCIS will decide your Form N-400. USCIS may grant the application, continue the case, or deny it.
A continued case means USCIS needs additional information, testing, or another action before making a final decision. If USCIS grants your application, you move to the final stage of naturalization: taking the Oath of Allegiance.
Step 8. Attend the Oath of Allegiance Ceremony
Approval of Form N-400 does not by itself make you a U.S. citizen. You become a naturalized U.S. citizen after taking the Oath of Allegiance at a naturalization ceremony.
USCIS will provide information about the date, time, and location of your ceremony. During the ceremony, you complete the final naturalization requirements and take the Oath.
See our Oath of Allegiance and naturalization ceremony guide for details about this final step.
Step 9. Receive Your Certificate of Naturalization
After taking the Oath of Allegiance, you receive a Certificate of Naturalization as evidence that you are a U.S. citizen. The certificate is an official citizenship document that you can use when you need to provide proof of U.S. citizenship.
See our Certificate of Naturalization guide for more information about the document and how it is used.
How Long Does the Naturalization Process Take?
There is no single processing time for every naturalization case. How long the process takes can depend on the USCIS field office handling Form N-400 and the circumstances of the individual case.
Requests for additional evidence, rescheduled appointments, background or security checks, and other case-specific issues can affect the timeline. USCIS processing times also change over time.
For the latest USCIS data and field-office information, see our current N-400 processing times guide.
How Much Does the Naturalization Process Cost?
For most applicants, the main USCIS government fee in the naturalization process is the Form N-400 filing fee. The current standard fee is $710 for online filing or $760 for paper filing.
Some applicants may qualify for a $380 reduced fee or a complete fee waiver. Applicants filing for naturalization based on qualifying military service under INA sections 328 or 329 do not pay the Form N-400 filing fee.
USCIS fees can change. See our U.S. citizenship cost and N-400 fee guide for current fee, reduced-fee, and fee-waiver information.
What If USCIS Needs More Information?
USCIS may need more information before it can decide your naturalization application. It may request additional evidence, continue your case after the interview, or schedule another appointment or test when required.
If USCIS continues your case, it does not automatically mean Form N-400 will be denied. The notice will explain what information or action is needed and when you must respond.
Read every USCIS notice carefully and follow the instructions by the stated deadline. Missing a response or required appointment can affect the outcome of your application.
What Happens If USCIS Denies Naturalization?
USCIS can deny Form N-400 if it determines that you have not established eligibility for naturalization. If your application is denied, USCIS will send you a written decision explaining the reasons.
The appropriate next step depends on why the application was denied and your individual circumstances. Some applicants may have options to challenge the decision or apply again when eligible.
See our guide to reasons Form N-400 may be denied for a detailed explanation of common denial issues and possible next steps.
What Should You Do After Becoming a U.S. Citizen?
After taking the Oath of Allegiance, review your Certificate of Naturalization to make sure the information is correct and keep the original document in a secure place. Your Certificate of Naturalization is official evidence of your U.S. citizenship.
You can also take several practical steps after the ceremony:
- Apply for a U.S. passport if you plan to travel internationally or want another form of citizenship evidence.
- Make sure the Social Security Administration has your updated citizenship status. If you requested an SSA update through Form N-400, follow up if needed.
- Register to vote if you are eligible and want to participate in elections.
Keep copies of important citizenship records, but store your original Certificate of Naturalization securely.
Naturalization Process FAQs
Can I travel outside the U.S. during the naturalization process?
Yes, you can generally travel while Form N-400 is pending. However, trips can still affect your continuous residence and physical presence requirements. You must also be available for USCIS appointments. Longer absences, particularly those lasting more than six months, may affect your naturalization eligibility.
What happens if I miss a USCIS appointment?
If you cannot attend a scheduled biometrics appointment, interview, or other USCIS appointment, follow the instructions on your notice to request a new date as soon as possible. Rescheduling can delay your case. Failing to appear or respond to USCIS may also affect your application.
Can I move while my naturalization application is pending?
Yes. If you move while Form N-400 is pending, update your address with USCIS as soon as possible and generally within 10 days of moving. Updating your address with the U.S. Postal Service does not update your USCIS records or ensure that USCIS mail will be forwarded.
Can I apply for naturalization while Form I-751 is pending?
Yes, if you otherwise qualify for naturalization. A pending Form I-751 does not automatically prevent you from filing Form N-400. USCIS will decide the Form I-751 before or at the same time as the N-400 because your conditional permanent resident status must first be resolved.
What happens if I do not pass the English or civics test?
If you do not pass the English or civics portion of the test at your first interview, USCIS generally gives you a second opportunity between 60 and 90 days later. You are retested only on the part you did not pass. USCIS may deny Form N-400 if you do not pass the second test.
Ready to Start the Naturalization Process?
If you are ready to apply for naturalization, ImmigrationDirect can help you prepare Form N-400 online with guided questions and filing instructions based on the information you provide. Review your answers carefully before submitting your application to USCIS.
ImmigrationDirect is not affiliated with USCIS or any government agency. ImmigrationDirect service fees are separate from USCIS government filing fees, and using the service does not guarantee approval.
