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Path to US citizenship — step-by-step guide for residents

How to naturalize as a US citizen: 5 years (or 3 if married to citizen), residency requirements, English + civics exam, biometrics, interview, oath ceremony. Timeline, costs, common errors.

Path to US citizenship — complete guide

US naturalization is the process by which a lawful permanent resident (green card holder) becomes a US citizen. This is the final step on the immigration path for many — it opens rights including voting, US passport, petitioning for family without limits, federal government employment.

Process summary

Total typical time: 8-15 months from filing Form N-400 to oath ceremony.

8 steps:

Meet eligibility requirements
File Form N-400 + pay $760 (online) or $710 (paper)
Receive biometric appointment (fingerprints + photo)
Attend interview at USCIS Field Office
Take civics exam (10 questions, must pass 6)
Take English exam (reading, writing, conversation with officer)
Receive decision (approval, denial, or request for additional evidence)
Attend oath ceremony

Step 1: Eligibility requirements

General requirements

✅ 18+ years at filing
✅ Lawful permanent resident (green card) for at least 5 years (3 if married to US citizen and lived together for last 3 years)
✅ Continuous physical presence in US — at least half the residency period (2.5 of last 5 years)
✅ Continuous residency — no more than 6 months outside US in one trip (more than 1 year automatically breaks continuity)
✅ Good moral character — no serious crimes, no tax evasion, registered for Selective Service (males)
✅ English proficiency — reading, writing, speaking (age/years exceptions)
✅ Civics knowledge — US history + government (10 questions, must pass 6)
✅ Loyalty to the Constitution — oath

English exam exceptions

50+ years old + 20+ years with green card: civics exam in native language
55+ years old + 15+ years with green card: civics exam in native language
65+ years old + 20+ years with green card: simplified civics exam (20 questions, must pass 6) in native language

Step 2: File N-400

Cost

Online: $760 (includes biometrics)
Paper: $710 (includes biometrics)
75+ years old: exempt from biometrics fee ($85)
Active military: FREE

How to file

Create account at my.uscis.gov
Fill out N-400 online (faster than paper)
Upload digital documents (green card, marriage evidence if applicable, tax records)
Pay fee with card or check/money order
Receive Receipt Notice (Form I-797) by mail confirming

Steps 4-5: Interview + civics exam

Approximately 4-9 months after biometrics, USCIS schedules the interview.

What to bring

Interview appointment letter
Current green card + photo ID
Valid passport
List of trips outside US (with exact dates) for last 5 years
Marriage certificate if 3-year rule
Previous divorce decrees (yours + spouse’s)
Tax records for last 5 years (IRS transcripts)
Complete criminal record if any history
Child support compliance proof (if applicable)

English exam

Officer asks you to:

Read aloud: 1-3 short sentences from USCIS reader
Write: 1-3 sentences officer dictates
Conversation: understand and respond to basic questions during interview

Civics exam

Officer chooses 10 questions from official bank of:

100 questions (2008 version, most applicants)
128 questions (2020 version, applicants from certain date)

Must correctly answer at least 6 of 10.

USCIS publishes the complete question bank. Study in advance.

Step 7: Oath ceremony

Formal ceremony at USCIS Field Office or federal court:

Identity verification
Hand in green card
Read Oath of Allegiance
Receive Certificate of Naturalization
Some ceremonies include immediate voting + voter registration

Step 8: After ceremony

Apply for US passport — travel.state.gov, $130
Update Social Security — SSA must register new citizenship
Register to vote — often at the ceremony itself
Notify USCIS of pending cases
Consider petitioning for family — as citizen you can petition for spouse, children, parents, siblings

Dual citizenship

US permits dual citizenship. If your origin country also permits (Mexico, Colombia, El Salvador, Honduras, Ecuador, Peru, Argentina, Spain, etc.), you can keep both.

Common errors causing denial/delay

Insufficient physical presence — not meeting 30 months in last 5 years
Prolonged trips — single trip >6 months can break continuity
Unpaid taxes — IRS must verify 5 years of returns
Not registered for Selective Service (males 18-25 upon green card)
Unpaid child support — uncomplied court orders
Lying on N-400 — fraud is grounds for denial AND revocation
Undisclosed criminal history — including DUI, arrests without conviction

Total process costs

N-400 fee: $710-$760
Passport after naturalization: $130 + $35 execution
Total: ~$875-$925 USD

Realistic timeline

Phase	Time
Meet 5 years (or 3) with green card	3-5 years prior waiting
Document preparation	1-3 months
N-400 filed → Receipt Notice	1-4 weeks
Receipt → Biometric	4-8 weeks
Biometric → Interview	4-9 months
Interview → Decision	same day or 1-3 months
Decision → Oath	1-3 months
TOTAL N-400 to oath	8-15 months typical

Form N-400 — Naturalization
Form I-90 — Green Card Renewal
N-600 Certificate of Citizenship — for children of citizens
Public Charge Rule

Last verified: 2026-05-24. General information — not legal advice. Free resources: CLINIC, NILC, ILRC, AILA pro bono.

Consulate of your country in the US — passport renewal, consular ID, document apostille
ITIN — file federal taxes without SSN — required regardless of immigration status
USCIS form library — federal immigration forms (I-130, I-485, N-400, etc.)
Find an immigration attorney — pro bono lists + AILA + BIA-recognized
Know Your Rights — ICE encounters — constitutional protections

Frequently asked questions

Who can apply for US citizenship through naturalization?

Most lawful permanent residents (green-card holders) who are at least 18, have held the green card for the required time, meet physical-presence and good-moral-character rules, and can show basic English and civics knowledge. You apply on Form N-400.

How long must I be a permanent resident before I can naturalize?

Generally 5 years as a permanent resident, or 3 years if you are married to and living with a US citizen. You also must have been physically present in the US for at least half that period.

What is on the naturalization test?

An English test (reading, writing, speaking) and a civics test of up to 10 questions drawn from a 100-question list, of which you must answer 6 correctly. Some older, long-term residents qualify for exemptions or the test in their own language.

How much does it cost to naturalize?

There is a USCIS filing fee for Form N-400 (a few hundred dollars), and fee waivers or reductions exist for low-income applicants. Because the fee schedule changes, confirm the current amount on the N-400 page at uscis.gov.

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General information, not legal advice. MigrantUSA is an independent publisher and is not a law firm; using this site does not create an attorney-client relationship, and this content is not a substitute for advice from a licensed attorney about your specific situation. US federal, state, and local government procedures, fees, and forms change. Always verify current details directly with the relevant agency before acting. For immigration, tax, or other legal matters specific to your situation, consult a licensed attorney or BIA-accredited representative.