N-400 Online Filing: A Step-by-Step Guide for 2026

Form N-400 can be filed online through a USCIS account by working through sections on personal information, addresses, employment, travel, and good moral character, then paying the filing fee and submitting electronically.

In short

• N-400 can be filed 90 days before the residency period ends, but every requirement must be fully met by the time the application is reviewed.
• For marriage to a US citizen, the timeline shortens to 3 years of continuous residence instead of the standard 5.
• The online filing fee for N-400 is $710; applications requesting a fee waiver can’t be filed electronically.
• The good moral character section requires honest disclosure of all arrests and detentions — USCIS has a comprehensive database, and concealment is riskier than the underlying issue.
• Employment and travel history must be listed for the past 5 years (3 years for marriage-based filing) with no gaps.

Who Can File N-400 and When

Form N-400 can be filed 90 days before meeting the time-based requirement — in other words, before the required years of permanent residence have formally elapsed. The USCIS website states this filing window directly, so applicants don’t need to wait for the exact expiration date. That said, this doesn’t mean eligibility for naturalization kicks in early: by the time the application is reviewed, every requirement — including continuous residence — must be fully met.

Basic conditions for applicants:

• at least 18 years old at the time of filing;
• held permanent resident status (green card) for at least 5 years;
• continuous residence in the US throughout those 5 years;
• physical presence in the country for at least 30 months within that period;
• willingness to demonstrate attachment to the US Constitution and take the Oath of Allegiance.

For applicants married to a US citizen, the timeline is shorter: the application can be filed after 3 years of continuous residence as a permanent resident, provided the marriage is still valid at that point.

Five years since receiving a green card isn’t enough on its own — the key condition is continuous residence and physical presence in the country. Extended trips abroad can break that continuity: the application will be denied even if the formal five years have technically passed. Applicants who travel frequently or for long stretches should count their days of absence ahead of time — ideally with a lawyer’s help — to avoid misjudging the right moment to file.

Five years since receiving a green card isn’t enough on its own — the key condition is continuous residence and physical presence in the country.

Preparing for Online Filing: the USCIS Website and Account

The current N-400 form and its instructions are found on the official USCIS website — searching “N-400” brings up the form’s page as the first result. The page offers the form itself in PDF along with filing instructions.

Before starting, check the edition date at the bottom of the page — it should be the one currently in effect. It’s also worth checking every page of the form individually: the same date should appear in the bottom-left corner on each page. If the dates don’t match, the pages likely belong to different editions of the form; such an application risks delayed acceptance or being returned for correction, so it’s safer to download all pages fresh from the official site.

The same USCIS page describes both filing methods for N-400 — online and by paper mail. It also includes a fee calculator to determine the payment amount, a document checklist for uploading or mailing, and instructions on biometrics. One exception is noted separately: applications requesting a fee waiver cannot be filed electronically — those are accepted on paper only.

Online filing requires a USCIS account — the personal portal through which the form itself is later completed. Applicants without an account create one using the Create an Account button; those who already have one simply log in. A one-time verification code is sent by email at login.

After logging in, applicants select N-400 — Application for Naturalization — from the list of forms available for online filing. The same account is later used to pay the fee, track case status and updates, manage contact information, and respond to USCIS requests.

Choosing the Filing Basis in the Online Form

The first step in the online form is selecting the basis for naturalization. The system offers several options, and the choice determines which requirements get checked for the applicant going forward.

• General provision — the applicant has continuously resided in the US as a permanent resident for 5 years or more. This is the main option for most applicants.
• Marriage to a US citizen — the applicant is married to a US citizen.
• VAWA (Violence Against Women Act) basis — the applicant’s spouse, former spouse, or child is a US citizen, and the applicant has been a victim of domestic violence.
• Marriage to a US citizen employed abroad — the applicant’s spouse is a US citizen with qualifying employment outside the country.
• Military service — service during hostilities or at least one year of service during peacetime.

Beyond these, the system includes other bases for specific categories of applicants. In the standard case — someone who received a green card and has lived in the US for the required period — the general provision applies: 5 years of continuous residence as a permanent resident. After selecting a basis, the form moves to a question about whether anyone helped fill out the application — most applicants answer “no” here and proceed to personal information.

Personal Information, Contacts, and Addresses in Form N-400

After choosing the filing basis, the form asks whether anyone helped complete the application — those filling it out themselves answer “no.” Next comes the applicant’s first and last name: a middle name, if any, goes in the middle name field.

A separate question asks whether the applicant has used other names since birth. If the answer is “yes,” the previously used name or surname must be stated. A related question asks about changing one’s name at naturalization: answer “yes” if, for example, the green card or residence permit uses a different transliteration of the name and the applicant wants to become a citizen under the new spelling. In that case, the form records the name the applicant wants to use after naturalization.

The contact information section asks for a phone number — a second number can be added if it’s more convenient to use different contacts at different times, though only one is required. The email address is usually pre-filled with the one linked to the USCIS profile, but it can be changed if needed.

Next comes the current residential address: street number and name, city, and ZIP code, along with the date the applicant started living there. A mailing address is entered separately only if it differs from the residential address — if they’re the same, it’s enough to indicate that in the form.

A separate requirement is to list every residential address from the past 5 years, if applicable. If the applicant has lived at one address for longer than 5 years, nothing further needs to be added. The exception is naturalization based on marriage: in that case, addresses are listed for the past 3 years rather than 5.

Employment History and Trips Abroad

The form requires listing every place of employment for the past 5 years — this period is tracked separately from the address history discussed above. For each period, applicants select what they were doing: working, self-employed, in school, or unemployed.

Current employment is listed first, if applicable. Applicants enter the employer’s name, job title from a dropdown list (for example, “lawyer”), the start date, and the address — city, country, state, and ZIP code. If the person still works there, they check “currently employed.”

After one entry is added, the system keeps asking for the rest of the 5-year history and won’t drop the requirement until the period is fully accounted for. So applicants add the next job, or, if there was a stretch with no employment, record that as a separate entry.

For a period without employment, “unemployed” goes in the employer field, along with start and end dates. The exact start date of an unemployment period isn’t always easy to recall — an approximate date works, and it’s better to err earlier rather than later: April instead of May, for instance, if the exact month is uncertain. The main requirement is that the entire 5-year history be accounted for with no gaps, right up to the date of starting the new job. Once the system stops asking for an additional period, the employment history block is considered complete.

The exact start date of an unemployment period isn’t always easy to recall — an approximate date works, and it’s better to err earlier rather than later

Next, the form asks about trips outside the US over the past 5 years — including short ones. What’s recorded isn’t the date of arrival at the destination but the date the applicant left the US. For example, for a trip to Canada with departure on December 12, 2025 and return on December 15, the form records the departure date — December 12. If there were several trips, each country gets a separate entry added through the “add country” button.

After travel history, the form moves to marital status and children. Every child under 18 must be listed — born in the US or elsewhere, living separately, adopted, stepchildren, and those born outside marriage: whether the birth occurred within a marriage doesn’t matter. If there are children, the number is entered first, then each child’s details are added through the “add a child” button.

The Good Moral Character Section: Questions About Conduct

After the section on children, the form moves to the good moral character block. For most items the answer is “no,” but each question needs to be read carefully on its own: if even one answer is “yes,” the system requires further detail.

The first group of questions concerns citizenship and taxes: whether you’ve ever claimed to be a US citizen without being one; whether you’ve registered to vote in federal, state, or local elections; whether you currently hold a title of nobility in another country; whether you owe overdue federal, state, or local taxes. Unpaid taxes can be counted as a factor against good moral character. A separate question asks whether you’ve called yourself a nonresident of the US on a tax return since receiving your green card, or decided not to file a return for that reason.

Next come questions about membership in communist or totalitarian parties, support for them, involvement in armed or paramilitary groups, kidnapping, torture, genocide, killing, sexual assault, or persecution based on religion, race, nationality, or political opinion. A “yes” answer on any of these items creates a risk of denial. The form separately asks about weapons training or military training — there’s no exception here: even ROTC, reserve drills, or marksmanship classes must be disclosed honestly, with a brief explanation in the additional information section at the end of the form.

The section on crimes and offenses requires listing anything you committed yourself, helped commit, or incited — even if there was no arrest, and regardless of whether it happened in the US or another country. This includes domestic violence, driving under the influence, and offenses committed before age 18. Applicants must disclose arrests, detentions, charges, guilty pleas, convictions, referral to an alternative sentencing or rehabilitation program, probation, pardons, amnesty, parole, or situations where charges were filed or an investigation was reported.

Good Moral Character is the most consequential section of the form, and it must be completed with absolute honesty: arrests, detentions, or tax problems cannot be concealed. The immigration service has a comprehensive database, and trying to hide something is riskier than the underlying issue itself — it’s a matter of honesty that can cost someone their citizenship. Anyone with questionable history should consult a lawyer before filing.

trying to hide something is riskier than the underlying issue itself — it’s a matter of honesty that can cost someone their citizenship

The last part of this section covers immigration proceedings: the form asks whether the applicant has ever been deported or had residency in the US revoked. This refers specifically to the United States, not other countries; if it happened, it must be disclosed.

Selective Service and the Oath to the Constitution

Men are asked a separate question: did they live in the US at any point between their 18th and 26th birthday? If so, registration with Selective Service was required, and this must be reflected in the application. In the example walked through here, the applicant is 25 and lived in the US during that period, so he answers “yes” to the residency question and then states whether he registered with Selective Service, along with the registration date and number.

Next comes the section on military service. The form asks:

• whether the applicant left the US to avoid the draft;
• whether the applicant ever applied for an exemption from US military service;
• whether the applicant has ever served in the US armed forces;
• whether the applicant is currently a member of the armed forces or a former service member living outside the US.

This section connects logically to earlier questions about service in military or police units, which ask whether the applicant served in a military or police unit, belonged to an armed group — including paramilitary units, self-defense units, insurgent or guerrilla groups — or volunteered or worked at a place where people were held: prisons, POW camps, detention centers, or labor camps. A “yes” answer to any of these requires further detail and raises the risk of denial.

After that, the form moves to the section on attachment to the US Constitution. It asks whether the applicant supports the Constitution and form of government of the United States and understands the full Oath of Allegiance. For most of this section the answer is “yes,” but each question still needs individual attention: the wording differs in meaning, not just phrasing.

One item asks whether the applicant is able to take the oath given physical or mental limitations: those who cannot answer “yes”; those without limitations answer “no.” The form then asks whether the applicant is willing to bear arms on behalf of the US if required by law, to perform noncombatant service in the armed forces, or to perform work of national importance under civilian direction — each of these is answered based on the applicant’s actual willingness.

Uploading Documents, Paying the Fee, and Submitting the Application

After the military service questions, the form moves to uploading supporting documents.

1. Green card. This is the first required proof of current permanent resident status. Before uploading, the system shows the file requirements — format and legibility standards.
2. Additional evidence. This is where documents proving residence in the US go: a driver’s license, lease agreement, proof of property, tax returns. Form I-94 and a foreign passport can also be added here, along with any other documents the applicant considers relevant.
3. Additional information. Anything that didn’t fit into the earlier sections of the form goes here as a separate item.

Once documents are uploaded, the system displays the filing fee — as of this article, $710 for online filing (the paper filing fee is different). Before paying, it’s worth checking the current fee calculator on the USCIS website, since the amount can change.

The form then validates the entered data. If something is incorrect, a warning appears asking the applicant to go back and fix the data or documents: for instance, the system won’t accept an invalid A-number until it’s corrected. Once every field is filled in correctly, a confirmation appears and the applicant can continue.

Before submission, the system displays the entire draft form — it can be scrolled through and reviewed, and uploaded documents can be checked and corrected if needed. After that, the applicant needs to:

• check a box confirming everything has been read and is agreed to;
• enter an electronic signature — first and last name;
• click “Pay & Submit” and pay the fee — after that, the form is considered filed.

It’s possible to exit without paying the fee right away: the form then stays saved as a draft that can be returned to later to review and add information. The draft shows a date through which it remains valid — matching the date the form was last updated.

What’s Needed to Upload Documents and File N-400

• Green cardrequiredrequired proof of current permanent resident status
• Driver’s license, lease agreement, proof of propertyas additional evidence of residence in the US
• Tax returnsas part of additional evidence
• Form I-94optional, under additional evidence
• Foreign passportoptional, under additional evidence
• Electronic signature (first and last name)requiredbefore submitting the form
• Fee payment of $710requiredamount for online filing — check the USCIS fee calculator for updates

Frequently asked questions

What happens if N-400 is filed but the requirements aren’t fully met by the time of the interview?

Filing is allowed 90 days before meeting the time-based requirement, but that doesn’t mean eligibility starts early. By the time the application is reviewed, every requirement — including continuous residence and physical presence — must be fully met, or the application will be denied.

Can a draft N-400 be corrected after some information has already been entered incorrectly?

Yes: exiting the form without paying the fee leaves it saved as a draft that can be returned to later to review and add information. The draft shows a date through which it remains valid, matching the date the form was last updated.

Can someone file N-400 for another person or help a relative fill it out?

The form directly asks whether anyone helped complete the application — this is a scenario the form accounts for, not a violation. Applicants filling it out themselves answer “no” to this question and move on to personal information.

What happens if there’s an unaccounted-for period in employment or address history over the past 5 years?

The system won’t let the applicant move forward until the entire five-year period is accounted for with no gaps: for periods without employment, “unemployed” goes in the employer field along with start and end dates, using approximate dates if needed and erring toward an earlier start date. The employment history block is only considered complete once the system stops asking for an additional period.

How long does a saved N-400 draft remain valid?

The draft itself shows a date through which it remains valid, matching the date the form was last updated. That means the deadline isn’t fixed in advance — it shifts every time the applicant returns to work on the form.

Does an applicant need to register with Selective Service if they only lived in the US for part of the period between ages 18 and 26?

Registration was required for men who lived in the US at any point between their 18th and 26th birthday — living in the US during part of that period is enough, not the entire stretch. The form reflects this by answering “yes” to the residency question and then stating whether the applicant registered, along with the registration date and number.

What happens after N-400 is filed and the fee is paid?

Once “Pay & Submit” is clicked and the fee is paid, the form is considered filed. After that, the USCIS account can be used to track case status and updates, manage contact information, and respond to any USCIS requests.