Many immigrants live in the United States for decades as permanent residents without applying for citizenship.
For some people, changing their nationality is deeply connected to identity. It can feel like an enormous personal decision rather than simply the next step in an immigration process. Some are comfortable keeping their green cards indefinitely, and becoming a U.S. citizen may not feel necessary to them.
I understood that perspective, but I did not feel the same conflict myself.
I was born and raised in Korea and lived there until I graduated from college. I did not believe that receiving a different passport would erase those years or fundamentally change who I was. My Korean background was already an inseparable part of me.
At the same time, I had decided to build my life permanently in the United States. If I intended to continue living here, working here, and making this country my home, becoming a U.S. citizen seemed like the most practical and logical choice. I believed citizenship would give me greater stability and certain rights and benefits without taking away the identity I already had.
For me, applying for citizenship was not a rejection of Korea. It was a practical acknowledgment of the life I had chosen in America.
I moved to the United States in 2009 and became a naturalized U.S. citizen in 2017. By then, I had been a permanent resident long enough to qualify under the general five-year rule and had not spent extended periods outside the United States.
Many applicants hire an immigration attorney to help them navigate the paperwork. I chose to handle the process myself.
I researched every requirement, collected every document, and completed the application on my own—not only for myself, but as I had done with so much of my family’s paperwork in America. It was extremely stressful. A mistake or an incomplete answer could delay the application or create questions during the naturalization process.
Before submitting everything, I asked an attorney I knew to conduct a final review. She was not an immigration attorney, but she was also an immigrant and had completed her own naturalization shortly before I did. Having another person carefully review the paperwork gave me some reassurance before I filed.
My case was relatively straightforward, but the experience taught me how much preparation goes into becoming a citizen. The process involves much more than studying civics questions. USCIS reviews your immigration history, travel, residence, taxes, legal background, and the information you provide throughout the application.
If you are considering applying, here is how the U.S. naturalization process generally works—from determining whether you are eligible to taking the Oath of Allegiance.
Here is how the U.S. naturalization process generally works, from determining your eligibility to becoming a citizen.
What Is Naturalization?
Naturalization is the legal process through which a lawful permanent resident—commonly called a green card holder—becomes a U.S. citizen.
It is different from citizenship acquired automatically at birth or through a U.S. citizen parent. Most adult green card holders seeking citizenship apply by submitting Form N-400, Application for Naturalization, to U.S. Citizenship and Immigration Services, or USCIS.
Becoming a citizen can provide important rights and opportunities, including the ability to:
Vote in federal, state, and local elections
Apply for a U.S. passport
Remain outside the United States without risking abandonment of permanent-resident status
Apply for certain government jobs
Petition for some relatives under citizenship-based immigration categories
Serve on a jury
Participate more fully in civic life
Citizenship also brings responsibilities, including supporting the Constitution, obeying the law, serving on a jury when called, and fulfilling other obligations stated in the Oath of Allegiance.
Step 1: Determine Whether You Are Eligible
The most common path requires an applicant to have been a lawful permanent resident for at least five years.
Some applicants married to U.S. citizens may qualify after three years as permanent residents if they have been living in marital union with the same U.S. citizen spouse and meet the other requirements.
The rules can vary for members of the military, spouses of U.S. citizens employed abroad, children of citizens, and certain other applicants.
Under the general five-year rule, you usually must:
Be at least 18 years old when filing Form N-400
Have been a lawful permanent resident for at least five years
Have lived continuously in the United States for the required period
Have been physically present in the United States for at least 30 months of those five years
Have lived for at least three months in the state or USCIS district where you apply
Demonstrate good moral character
Demonstrate basic English ability, unless an exception applies
Pass a test on U.S. history and government
Show attachment to the principles of the U.S. Constitution
Be willing to take the Oath of Allegiance
Applicants using the three-year marriage-based rule generally must have been physically present in the United States for at least 18 months during the three-year period.
USCIS provides an eligibility worksheet and naturalization information to help prospective applicants evaluate the requirements.
Continuous Residence and Physical Presence Are Different
These two requirements sound similar, but they measure different things.
Continuous residence refers to maintaining your primary home in the United States throughout the required period.
Physical presence refers to the actual number of days you were physically inside the country.
A trip lasting more than six months may raise questions about whether you interrupted your continuous residence. An absence lasting one year or longer will generally break continuous residence unless a specific exception applies.
Applicants must report international travel taken during the period requested on Form N-400. Review old passports, travel confirmations, and entry records carefully before completing this section.
Under the regular five-year route, USCIS generally requires at least 30 months—913 days—of physical presence during the five years immediately before filing. USCIS explains the residence and physical-presence requirements here.
If you have taken a long trip, worked abroad, maintained a home in another country, or spent significant time outside the United States, consider obtaining legal advice before applying.
Can You Apply 90 Days Early?
Some applicants may file Form N-400 up to 90 calendar days before completing the required three- or five-year continuous-residence period.
This does not mean that every eligibility requirement can be completed early. You must still meet all applicable requirements when USCIS reviews and decides your application.
Use the USCIS early-filing calculator or carefully calculate your permanent-resident anniversary before submitting the form. Filing even a little too early can cause problems.
Step 2: Review Your Immigration, Travel, Tax, and Legal History
Before completing Form N-400, gather the information needed to answer the application accurately.
You may need:
Your current and expired green cards
Current and expired passports
Dates of all international trips during the required period
Addresses where you have lived
Employment and school history
Marriage and divorce records
Information about your current and former spouses
Information about your children
Federal, state, and local tax records
Selective Service information, if applicable
Records relating to arrests, citations, charges, or court cases
Documents relating to child or spousal support
Any previous immigration applications or proceedings
Do not assume that an old arrest, dismissed charge, tax issue, or immigration problem can be omitted because it happened years ago.
Form N-400 asks broad questions about criminal conduct and legal history. In some situations, applicants must disclose an incident even if the charge was dismissed, expunged, or sealed.
Immigration consequences can be serious. Speak with a qualified immigration attorney before filing if you have:
Ever been arrested, charged, or convicted
Failed to file required tax returns
Owed significant taxes
Spent an extended period outside the United States
Claimed to be a U.S. citizen before becoming one
Registered to vote or voted before becoming eligible
Failed to provide required financial support
Received permanent residence through a marriage that later ended
Given inconsistent information on previous immigration forms
Been placed in removal or deportation proceedings
Questions about Selective Service registration
Filing for naturalization invites USCIS to review your entire immigration history, not only the most recent five years.
Step 3: Complete Form N-400
Form N-400 can generally be filed online through a USCIS account or submitted by mail.
Online filing can make it easier to:
Complete the application electronically
Upload supporting documents
Pay the filing fee
Receive notices
Track the case
Send secure messages
View appointment information
However, applicants requesting a reduced fee or fee waiver must currently file a paper application.
When completing the form, make sure the information is consistent with your previous immigration records. Review names, addresses, travel dates, marriages, employment history, and legal questions carefully.
Do not guess if you do not understand a question. The USCIS officer will review the application with you during the interview, but inaccurate answers can create delays or more serious problems.
How Much Does Form N-400 Cost?
As of August 2026, USCIS lists the standard N-400 filing fees as:
$710 for online filing
$760 for paper filing
$380 for an approved reduced-fee paper application
$0 for applicants who qualify for a fee waiver
The biometrics cost is included in the N-400 filing fee.
Reduced-fee and fee-waiver requests have separate eligibility and documentation requirements. Applicants requesting either option cannot file N-400 online under the current system.
Fees and rules can change, so always verify the amount on the official USCIS Form N-400 page immediately before submitting your application.
Step 4: Attend a Biometrics Appointment if Required
After USCIS accepts the application, it will send a receipt notice.
USCIS may then:
Schedule you for a biometrics appointment
Reuse fingerprints previously collected
Request additional information
If an appointment is required, USCIS will send a notice showing the date, time, and Application Support Center location.
Biometrics may include fingerprints, a photograph, and a signature. USCIS uses this information to conduct identity, criminal-history, and national-security background checks.
Follow the instructions on the appointment notice and bring the requested identification. Missing an appointment without properly rescheduling it can delay the application.
Step 5: Prepare for the Naturalization Interview
USCIS will eventually send an interview notice with the date, time, and location.
At the interview, a USCIS officer will place you under oath and review your N-400 application. The officer may ask about:
Your identity
Permanent-resident history
Addresses and employment
International travel
Marriage and family information
Taxes
Legal or criminal history
Membership in organizations
Your willingness to take the Oath of Allegiance
Bring the documents requested in your appointment notice. These may include:
Your green card
State-issued identification
Current and expired passports
Travel records
Marriage, divorce, or name-change documents
Tax documents
Certified court records, if applicable
Evidence supporting eligibility under the three-year marriage rule
Any additional documents requested by USCIS
Review your complete N-400 before the appointment. The English-speaking portion of the test is partly based on your ability to understand and answer the officer’s questions about the application.
Step 6: Take the English and Civics Tests
Most applicants must take both an English test and a civics test during the naturalization interview.
The English test
The English portion evaluates three skills:
Speaking: Evaluated while you answer questions during the interview
Reading: You must correctly read one out of three sentences
Writing: You must correctly write one out of three sentences
The standard is basic English, not perfect grammar or pronunciation.
The current civics test
Applicants who file Form N-400 on or after October 20, 2025, generally take the 2025 Naturalization Civics Test.
It is an oral test based on a bank of 128 questions about U.S. government and history. The officer may ask up to 20 questions, and the applicant must answer at least 12 correctly to pass.
The test stops once the applicant answers 12 questions correctly or 9 incorrectly.
This is different from the older 2008 test that I took during my own naturalization process. Applicants who filed before October 20, 2025, may still be tested under the earlier version, depending on the applicable USCIS rules.
Because elected officials and certain answers can change, use USCIS’s current naturalization test study materials, rather than relying only on an old book, video, or app.
Are There Age or Disability Exceptions?
Some longtime permanent residents are exempt from the English-language requirement:
50/20 exception: Age 50 or older with at least 20 years as a permanent resident
55/15 exception: Age 55 or older with at least 15 years as a permanent resident
Applicants qualifying for one of these exceptions must still take the civics test but may take it in their preferred language with a qualified interpreter.
Applicants who are at least 65 years old and have been permanent residents for at least 20 years receive special consideration for the civics test and study from a designated group of questions.
A person whose physical or developmental disability or mental impairment prevents compliance with the English or civics requirements may request a medical exception using Form N-648, completed by an authorized medical professional.
These rules are specific, so review the official USCIS exceptions and accommodations page before applying.
What Happens if You Do Not Pass the Test?
Failing one portion at the first interview does not necessarily mean the entire application is immediately denied.
USCIS generally gives an applicant a second opportunity to take the portion that was not passed. The retest is normally scheduled between 60 and 90 days after the first interview.
You are retested only on the portion you failed.
If you do not pass the required test after the second opportunity, USCIS may deny the naturalization application.
Step 7: Receive a Decision
After the interview, USCIS may:
Grant the application
Continue the case because more evidence, testing, or review is needed
Deny the application
Some applicants receive an approval decision at the interview. Others receive it later by mail or through their online USCIS account.
A continued case does not automatically mean there is a serious problem. USCIS may need additional documents, further background-check results, or a second testing appointment.
Read every notice carefully and respond by the stated deadline.
Can You Change Your Name During Naturalization?
In some circumstances, applicants can request a legal name change as part of the naturalization process.
I used this opportunity when I became a citizen in 2017. I chose Katie as my legal first name, moved my Korean given name to my middle name, and kept my Korean family name.
For me, the change was not about erasing my Korean identity. It was about creating a legal name that reflected both parts of my life.
A naturalization name change generally requires a judicial oath ceremony, because a judge—not USCIS alone—has the authority to approve the new name. This may delay the ceremony depending on the availability of judicial ceremonies in your area.
A separate name-change request may not be necessary if your name has already legally changed through marriage, divorce, or a court order. Bring the document establishing that change.
Before requesting a name change, consider how it will affect:
Your Social Security record
Driver’s license
U.S. passport
Employer and payroll records
Bank and investment accounts
Professional licenses
Insurance
Property records
Travel reservations
Check the spelling on the Certificate of Naturalization before leaving the ceremony. Correcting a mistake later can take time and may require a fee.
Related post: Why I Chose an American First Name but Kept My Korean Last Name
Step 8: Attend the Oath Ceremony
Approval of Form N-400 does not by itself make you a U.S. citizen.
You become a citizen when you take the Oath of Allegiance at a naturalization ceremony.
Some applicants may attend a ceremony on the same day as the interview. Others receive Form N-445, Notice of Naturalization Oath Ceremony, with a later date and location.
Before the ceremony, you must answer questions about events occurring after the interview, such as international travel, arrests, or changes in marital status.
At the ceremony, applicants generally:
Check in with USCIS
Surrender their permanent-resident cards
Review any final changes
Take the Oath of Allegiance
Receive their Certificates of Naturalization
After taking the oath, you are officially a U.S. citizen.
Do not surrender your green card early. Bring it to the ceremony as instructed.
Step 9: Review Your Certificate of Naturalization
Before leaving the ceremony, check that the certificate correctly shows:
Your full legal name
Date of birth
Country of former nationality
Other identifying information
Notify USCIS immediately if you see an error.
Your Certificate of Naturalization is one of your most important legal documents. Store it securely and do not routinely carry it with you.
USCIS advises against making unauthorized alterations to the certificate. If it is lost, damaged, or contains an error that must be corrected later, you may need to file Form N-565 and pay the applicable fee.
Step 10: Update Your Records as a New Citizen
After the ceremony, several practical tasks remain.
Consider:
Applying for a U.S. passport
Updating your Social Security record
Registering to vote
Updating your driver’s license or state identification
Updating your employer’s records
Updating banks, insurance companies, and financial accounts
Updating professional licenses
Updating your name wherever necessary
Reviewing immigration options for eligible family members
The current N-400 also allows some applicants to request issuance or replacement of a Social Security card and authorize USCIS to send citizenship information to the Social Security Administration. Check what you requested on your application and follow any instructions you receive.
Even so, confirm afterward that your Social Security record reflects your citizenship and correct legal name.
Apply for a U.S. passport when you are ready. You will generally submit your original Certificate of Naturalization with the application, and the Department of State will return it separately.
How Long Does Naturalization Take?
Processing times vary by USCIS field office and individual case.
Factors that may affect the timeline include:
The field office handling the case
Background-check processing
Requests for additional evidence
Long or complicated travel history
Criminal or immigration issues
A requested legal name change
The availability of judicial oath ceremonies
The need for a second test appointment
Check current estimates using the USCIS processing-times tool and track the case through your USCIS account.
Do not make irreversible travel or employment plans based only on an estimated completion date.
Did Becoming a U.S. Citizen Change My Identity?
Becoming a U.S. citizen was an important legal and personal milestone, but it did not suddenly change the way I understood myself.
I had been born and raised in Korea and lived there through college. Those experiences did not disappear when I received my Certificate of Naturalization. Citizenship changed my legal status, but it did not replace my history.
During the naturalization process, I also legally adopted Katie as my first name, moved my Korean given name to my middle name, and kept my Korean family name. Even that decision was not about leaving one identity behind for another. It was simply a way to create a legal name that worked naturally in my American life while preserving the name and family history I brought from Korea.
For me, naturalization was a practical decision based on where I had chosen to build my future. I was living permanently in the United States, developing my career here, and creating a life here. Becoming a citizen gave that decision legal permanence.
Years later, I am still Korean by background and American by citizenship. One does not cancel out the other.
Citizenship did not erase the life I had lived before coming to America. It became another part of the life I was continuing to build.
Final Thoughts
The naturalization process involves much more than studying civics questions.
USCIS reviews your residence, travel, taxes, legal history, immigration record, English ability, and willingness to accept the responsibilities of citizenship.
For a straightforward case, the basic process is:
Confirm your eligibility
Prepare your records
File Form N-400
Complete biometrics if required
Attend the interview
Pass the English and civics tests
Receive a decision
Attend the oath ceremony
Receive your Certificate of Naturalization
Update your records and apply for a passport
Take the application seriously, answer every question honestly, and use current USCIS instructions. If anything in your immigration or legal history concerns you, consult a qualified immigration attorney before filing.
The process may feel long, but the oath ceremony marks something extraordinary: the moment an immigrant’s years of building a life in America are formally recognized with citizenship.
This article shares general information and personal experience. It is not legal advice. Immigration laws, filing fees, forms, and procedures can change. Always consult USCIS or a qualified immigration attorney regarding your individual case.
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