Required
N-400
Application for Naturalization. Prepare your citizenship application using the free Fillvisa N-400 tool.
Open Fillvisa N-400
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Take the next step toward U.S. citizenship
Prepare for naturalization with a clear place to start. Explore Form N-400, gather your supporting documents, and understand the steps from application to interview and the Oath of Allegiance.
- Free form tools
- No signup
FIND YOUR PATH
Who is this case for?
Eligible lawful permanent residents
For green card holders generally age 18 or older applying under the five-year rule, or the three-year rule for qualifying spouses of U.S. citizens. Marriage alone does not establish eligibility; additional requirements apply.
YOUR PAPERWORK, ORGANIZED
Forms Included in this Application
Start with N-400 and the documents required for your eligibility category. Payment and notification forms depend on how you file.
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Payment option
G-1450
Authorization for Credit Card Transactions
Authorize a card payment when using this payment method for an eligible filing.
Open Fillvisa form : G-1450 -
Payment option
G-1650
Authorization for ACH Transactions
Authorize an ACH debit from a U.S. bank account. Follow current payment instructions for your filing.
Open Fillvisa form : G-1650 -
Optional
G-1145
E-Notification of Application/Petition Acceptance
Request a text message or email when a USCIS lockbox accepts your filing.
Open Fillvisa form : G-1145 - Required
Supporting evidence
Gather your green card, identity documents, travel and address history, and any tax, marriage, or other records required for your filing basis.
Review evidence instructions
Additional forms may apply, such as I-912 for an eligible fee-waiver request or N-648 for a qualifying disability exception. Review USCIS instructions for your circumstances. Check current fees, accepted editions, and filing instructions. Payment authorizations and G-1145 apply only to eligible paper filings.
BEFORE YOU BEGIN
Basic Eligibility Requirements
These are common naturalization requirements. Special categories, including military service, may follow different rules.
Get StartedAge and permanent residence
Generally be at least 18 and meet the five-year permanent-residence rule, or the three-year rule if you meet all requirements as the spouse of a U.S. citizen.
Residence and physical presence
Meet the continuous-residence, physical-presence, and local residence requirements for your category. Travel outside the United States can affect eligibility.
Good moral character
Meet the good-moral-character requirement and provide accurate information about your history and any required supporting records.
English, civics, and the oath
Meet the applicable English and civics requirements unless an exception applies, and be willing to take the Oath of Allegiance, subject to applicable modifications or waivers.
Early filing may be available up to 90 days before meeting the three- or five-year continuous-residence period; other requirements still apply at filing. Use the USCIS early filing calculator rather than counting three calendar months.
Official guidance: N-400 instructions · Naturalization eligibility. Fillvisa provides form tools and general information, not legal advice.
ONE STEP AT A TIME
Getting Started
Gather your information, choose your forms, and prepare at your own pace.
Prepare N-400 in your browser, review your answers and supporting documents, and submit following USCIS instructions. Then prepare for the interview, applicable tests, and oath ceremony.
Explore the forms- 1
Confirm your filing path
Identify your naturalization category, review residence and travel history, and confirm your earliest eligible filing date.
- 2
Collect your documents
Gather your green card, travel dates, address and work history, and any marriage, tax, or other records required for your category.
- 3
Prepare, review, and file
Complete N-400, review signatures and evidence, and verify current fees and filing instructions. Keep a copy, follow USCIS notices, and use official study materials to prepare for the interview.
CHOOSE THE HELP YOU NEED
Compare your preparation options
Prepare supported forms for free with Fillvisa, or explore paid services with additional guidance and support.
FREE FORM TOOLS
$0
Fillvisa service feeFillvisa
Free N-400 and supporting form tools to prepare your application in your browser. No signup required.
NATURALIZATION PACKAGE
$199
Additional forms may cost extraCitizenPath
Online preparation with personalized filing instructions and email and phone support.
ESSENTIALS
From $249
Enhanced $389 · Professional $615SimpleCitizen
Application preparation with multiple service levels, including options for legal review and support.
Prices are in USD and cover preparation services only. Government filing fees, where applicable, are separate. These services differ in scope; compare included forms and support before choosing.
Compare features and support
A closer look at what each option provides.
| Features | Fillvisa | CitizenPath | SimpleCitizen |
|---|---|---|---|
| Service price | $0 | $199 for the listed package | From $249; Enhanced $389; Professional $615 |
| Preparation approach | Self-service tools for individual forms | Guided online questionnaire | Application preparation with service tiers |
| Form coverage | N-400 and supporting tools listed above | Guided N-400 preparation and completed application package | Advertises all required forms for the selected application |
| PDF output | Download supported completed forms | Ready-to-sign application download | PDF application |
| Filing guidance | General information and official USCIS links | Personalized instructions and evidence checklist | Package features vary by service tier |
| Human support | Help Center and community resources | Email and phone support | Live chat; additional services vary by tier |
| Legal services | No attorney review or representation included | Self-service package; see provider for legal-service options | Legal review / support options; check selected tier |
| Government filing fees | Separate, where applicable | Separate | Separate |
Checked October 26, 2026. Sources: CitizenPath package details and SimpleCitizen pricing and features. Prices and inclusions may change; confirm details with each provider.