Becoming a US citizen is the last step in a long immigration journey for many people. It gives you the right to vote, a US passport, protection from deportation, and the ability to sponsor more family members. The process is called naturalization, and for most people it starts with one form: Form N-400, Application for Naturalization.
The process isn’t hard to follow, but small mistakes can cause delays or even a denial. This guide walks through every step in 2026, from checking eligibility to the oath ceremony. It’s general information, not legal advice. If you’ve had any arrests, long trips abroad, tax problems or past immigration issues, talk to an immigration attorney or a DOJ-accredited representative before you file.
Quick overview
| Step | What happens | Typical timing |
|---|---|---|
| 1. Check eligibility | Confirm years as a permanent resident, time in the US and other requirements | Before filing |
| 2. File Form N-400 | Apply online or by mail and pay the fee | Day 0 |
| 3. Biometrics | Fingerprints and photo at a local center | A few weeks after filing |
| 4. Interview and tests | English and civics tests with a USCIS officer | Often several months after filing |
| 5. Decision | Approved, continued or denied | Often the same day as the interview |
| 6. Oath ceremony | You take the Oath of Allegiance and become a citizen | Days to weeks after approval |
Processing times vary a lot by USCIS field office. Check the official USCIS processing times tool for your local office before you file.
Step 1: Check if you’re eligible
To apply for naturalization, most people must meet all of these requirements.
Age
You must be at least 18 years old when you file. Children under 18 may become citizens automatically through a citizen parent; that’s a different process.
Time as a green card holder
- 5 years as a lawful permanent resident for most applicants
- 3 years if you’ve been married to and living with the same US citizen spouse for those 3 years, and your spouse has been a citizen the whole time
You can file up to 90 days before you reach the 5- or 3-year mark. USCIS has an early filing calculator on its website. Filing even one day too early is a common reason for denial, so double-check your date.
Continuous residence
You must have lived in the US continuously for the 5 (or 3) years. Long trips abroad can “break” continuous residence:
| Length of a single trip | Effect |
|---|---|
| Less than 6 months | Generally doesn’t break continuous residence |
| 6 months to 1 year | USCIS presumes a break unless you can show you kept strong ties to the US |
| More than 1 year | Generally breaks continuous residence, with limited exceptions |
If you had a trip over 6 months, bring evidence of your US ties: tax returns, a lease or mortgage, a US job you kept, bank accounts and family in the US.
Physical presence
You must have been physically in the US for at least half of the qualifying period: 30 months out of 5 years, or 18 months out of 3 years. Add up every day you spent outside the country. Your passport stamps, airline records and CBP travel history help here.
Living in your state or district
You must have lived for at least 3 months in the state or USCIS district where you apply.
Good moral character
USCIS looks at your behavior during the qualifying period and sometimes earlier. Things that can cause problems include:
- Certain crimes, including DUIs and drug offenses
- Not paying court-ordered child support
- Failing to file taxes or owing back taxes without a payment plan
- Lying to get immigration benefits
- Claiming to be a US citizen, or voting in a federal election, before naturalizing
- For men who lived in the US between ages 18 and 25, failing to register with Selective Service
USCIS has signaled closer reviews of good moral character in recent years. Be honest on the form; hiding something is usually worse than the issue itself.
English and civics
You’ll need to read, write and speak basic English and pass a civics test on US history and government. Some older applicants and people with certain disabilities qualify for exemptions (see below).
Attachment to the Constitution
You must be willing to support the US Constitution and take the Oath of Allegiance.
Step 2: Gather your documents
The N-400 asks for a lot of detail. Having everything ready before you start makes filing much easier.
Basic documents
- Your green card (front and back)
- A valid passport
- Your Social Security number
- A list of every address you’ve lived at during the past 5 years
- Your employment and school history for the past 5 years
- Every trip outside the US lasting more than 24 hours in the past 5 years, with dates
If they apply to you
- Marriage certificate and your spouse’s proof of citizenship (for the 3-year rule)
- Divorce decrees for any previous marriages
- Children’s names, birth dates and addresses
- Court records for any arrest, citation or charge, even if dismissed or expunged
- Tax transcripts from the IRS if you’ve had tax problems
- Proof of Selective Service registration, if required
- Form N-648 completed by a doctor for a disability exception
Tip: Request your free IRS tax transcripts online before you apply. They’re useful if the officer asks about taxes, especially if you were abroad for long periods.
Step 3: File Form N-400
Online or on paper?
You can file online through a USCIS account or by mail.
Online filing is usually faster to submit, costs less, lets you upload evidence and track your case, and shows you notices in your account. Paper filing is required if you’re asking for a fee waiver or reduced fee.
Fees in 2026
| Filing option | Fee |
|---|---|
| Online | $710 |
| Paper | $760 |
| Reduced fee (household income at or below 400% of the federal poverty guidelines; file Form I-942) | $380 |
| Fee waiver (Form I-912, for qualifying low-income applicants) | $0 |
| Certain military applicants | $0 |
The fee includes biometrics, the interview, the tests and the oath ceremony. In June 2026, DHS proposed raising N-400 fees significantly and removing the reduced fee and fee waivers. As of early October 2026 that proposal has not taken effect, but if a final rule is published, fees could change quickly. Always confirm the current fee on the USCIS website on the day you file.
Tips for filling out the N-400
- Answer every question. Write “N/A” or “None” on paper forms rather than leaving blanks
- Make sure names and dates match your green card and passport
- List every trip outside the US over 24 hours
- Answer the yes/no questions about arrests, taxes and past conduct truthfully, even if a record was sealed or expunged
- Keep a copy of everything you submit
After you file, you’ll receive a receipt notice (Form I-797C). Save your receipt number to track your case.
Step 4: Biometrics appointment
A few weeks after filing, many applicants receive a notice for a biometrics appointment at an Application Support Center. USCIS takes your fingerprints, photo and signature for background checks. Bring the appointment notice and your green card. The appointment usually takes less than an hour. In some cases USCIS reuses earlier biometrics instead.
Step 5: The interview
You’ll receive an interview notice with the date, time and USCIS office. Arrive early, and bring:
- The interview notice
- Your green card, passports (current and expired) and state ID
- Originals of any documents you submitted
- Any updated documents, such as new tax returns or court records
What happens in the interview
A USCIS officer places you under oath and reviews your N-400 with you, question by question. They may ask about your trips, your job, your marriage, your taxes and the yes/no questions. If anything has changed since you filed, such as a new address, job or trip, tell the officer.
Step 6: The English and civics tests
Most applicants take both tests during the interview.
English test
- Speaking: judged during your interview conversation
- Reading: read one of up to three sentences correctly
- Writing: write one of up to three dictated sentences correctly
Civics test: which version will you take?
The version depends on when you filed:
| You filed your N-400 | Civics test | How it works |
|---|---|---|
| Before October 20, 2025 | 2008 civics test | Up to 10 questions from a list of 100; answer 6 correctly to pass |
| On or after October 20, 2025 | 2025 civics test | Up to 20 questions from a list of 128; answer 12 correctly to pass |
The officer stops asking once you’ve answered enough correctly to pass, or once it’s clear you can’t. USCIS publishes every question and answer, plus free study materials, flashcards and practice tests, on its Citizenship Resource Center.
Study tip: Some answers change with elections, such as the names of your US senators, your representative and your state’s governor. Look these up close to your interview date.
Exemptions and accommodations
| Exception | Who qualifies | What it means |
|---|---|---|
| 50/20 | Age 50+ with 20 years as a permanent resident when filing | No English test; civics test in your language with an interpreter |
| 55/15 | Age 55+ with 15 years as a permanent resident | Same as above |
| 65/20 | Age 65+ with 20 years as a permanent resident | No English test; a shorter, easier set of civics questions in your language |
| Medical disability | A qualifying physical or mental impairment | May be exempt from English and/or civics with Form N-648 |
You can also request accommodations, such as an accessible location or sign language interpreter.
If you fail a test
You get a second chance. USCIS schedules a re-test, usually within 60 to 90 days, and you only retake the part you failed. If you fail again, the application is denied, and you’d need to file a new N-400 and pay again.
Step 7: The decision
After the interview, you’ll get Form N-652 with one of three results:
- Granted: you passed and USCIS approved your application. Sometimes the oath can happen the same day
- Continued: USCIS needs more evidence or you need to retake a test
- Denied: you’ll get a written explanation. You can request a hearing with Form N-336 within 30 days
Step 8: The oath ceremony
You become a citizen only when you take the Oath of Allegiance. You’ll receive a notice (Form N-445) with the date and time. Before the ceremony:
- Answer the questions on the back of Form N-445 about anything that happened since your interview
- Bring your green card; you’ll return it at the ceremony
At the ceremony you take the oath, receive your Certificate of Naturalization, and often hear a welcome message. Check your certificate for spelling errors before you leave.
After you become a citizen
- Apply for a US passport. You’ll need it for international travel; use your original certificate
- Update your Social Security record so it shows you’re a citizen
- Register to vote. Many ceremonies offer voter registration on the spot
- Petition for relatives, including parents and married children, which only citizens can do
- Keep your certificate safe. Replacements are expensive and take time. Don’t laminate or photocopy it in ways that are prohibited
How long does the whole process take?
It depends on your USCIS field office. Some applicants finish in under a year; in busy offices it can take longer. If your case is outside normal processing times, you can submit an inquiry online or contact your congressional representative’s office for help.
Common mistakes that cause delays or denials
| Mistake | How to avoid it |
|---|---|
| Filing too early | Use the USCIS early filing calculator |
| Missing trips abroad | Check your CBP travel history and passport stamps |
| Not disclosing an arrest | Disclose everything, even dismissed cases, and bring records |
| Owing back taxes | Set up an IRS payment plan and bring proof |
| Forgetting Selective Service | Bring proof of registration or a status information letter |
| Not studying updated civics answers | Check current officeholders before your interview |
Should you get legal help?
Many people file the N-400 on their own. Get help from an immigration attorney or a DOJ-accredited representative if you have:
- Any arrest, citation or criminal record
- Trips abroad longer than 6 months
- Unpaid taxes or child support
- A previous deportation, overstay or immigration violation
- Questions about whether your green card was obtained correctly
Free and low-cost help is available from nonprofits that offer citizenship clinics. Be careful with “notarios” or consultants who aren’t attorneys; they can’t legally give immigration advice.
Final thoughts
Naturalization rewards preparation. Confirm your eligibility date, gather your travel and address history, file the N-400 carefully, and study for the civics test. On the day of your oath ceremony, all that paperwork turns into something much bigger: the full rights of a US citizen.
