# Form N-400 Explained: The Complete Guide to Becoming a U.S. Citizen

- Link: https://www.lumlawgroup.com/form-n-400-explained-the-complete-guide-to-becoming-a-u-s-citizen/
- Published: 2026-09-17T08:48:41-07:00
- Author: Albert J Lum

## IMMIGRATION FORMS

# Form N-400 Explained: The Complete Guide to Becoming a U.S. Citizen

 *  [     September 17, 2026  ](https://www.lumlawgroup.com/2026/09/17/)

 What Form N-400 does, who can apply for naturalisation, how the citizenship interview
and civics test work, what can delay an application, and what happens after approval.

## Form N-400 Explained:

##  The Complete Guide to Becoming a U.S. Citizen

A Green Card can give someone the right to build a permanent life in the United 
States.
Citizenship changes that relationship.

For many lawful permanent residents, naturalisation is the final major stage of 
an immigration journey that may have begun years earlier with a family petition,
employment opportunity, humanitarian application or other pathway to permanent residence.

The application at the centre of that process is Form N-400, Application for Naturalization.
But becoming a U.S. citizen is not simply a matter of having held a Green Card for
a certain number of years.

USCIS examines much more.
It may review an applicant’s residence history, international
travel, taxes, family circumstances, criminal history, immigration record, Selective
Service obligations where applicable, English ability, knowledge of U.S. government
and history, and whether the applicant satisfies the statutory requirements for 
naturalisation.

The naturalisation process therefore begins with a more important question than:
**“
Have I had my Green Card long enough?”The better question is:“Does my complete history
show that I am eligible to become a U.S. citizen?”

####  Table of Contents

## Quick Answer:

## What Is Form N-400?

**Form N-400 is the application most lawful permanent residents use to apply for
U.S. citizenship through naturalisation.**

Naturalisation is the legal process through which an eligible non-citizen becomes
a U.S. citizen.

For the standard naturalisation pathway, applicants generally must satisfy requirements
relating to:

 * age;
 * lawful permanent residence;
 * continuous residence;
 * physical presence;
 * residence within the state or USCIS district;
 * good moral character;
 * English language ability;
 * knowledge of U.S. history and government;
 * and attachment to the principles of the U.S. Constitution.

USCIS identifies these as core naturalisation eligibility requirements.

The application itself is only one part of the process.

A typical case moves through:

**Eligibility Review**

↓

**Form N-400**

↓

**Biometrics, if required**

↓

**Background Review**

↓

**Naturalisation Interview**

↓

**English and Civics Testing**

↓

**USCIS Decision**

↓

**Oath of Allegiance**

↓

**U.S. Citizenship**

And there is one critical distinction:

**An approved N-400 does not by itself make someone a U.S. citizen.**

Citizenship generally begins when the applicant completes the naturalisation process
and takes the **Oath of Allegiance**. USCIS states that an applicant is not a U.
S. citizen until the oath has been taken.

## Why Form N-400 Matters

Permanent residence and citizenship are not the same legal status.

A lawful permanent resident may generally live and work permanently in the United
States, but citizenship provides rights and protections that permanent residence
alone does not.

Depending on the circumstances, citizenship can provide:

 * the right to vote in federal elections;
 * eligibility for a U.S. passport;
 * broader ability to petition for qualifying family members;
 * protection from losing permanent resident status through extended residence abroad;
 * eligibility for certain government positions or benefits restricted to citizens;
 * and the ability to participate fully in civic life as a U.S. citizen.

But citizenship also comes with responsibilities.

The naturalisation process is therefore designed to establish that an applicant 
meets the requirements Congress has established for becoming a citizen.

This is why the N-400 should not be treated as a simple “upgrade” from a Green Card.

USCIS may examine years of the applicant’s history before making a decision.

## Who Can Apply for U.S. Citizenship With Form N-400?

There are several naturalisation pathways.

The most common are:

## **The Five-Year Rule**

Many lawful permanent residents become eligible to apply for naturalisation after
maintaining permanent resident status for **at least five years**, assuming the 
other requirements are satisfied.

Under this pathway, an applicant generally must also demonstrate sufficient continuous
residence and physical presence in the United States.

USCIS guidance generally requires at least **30 months of physical presence during
the five years immediately before filing**.

## The Three-Year Rule for Certain Spouses of U.S. Citizens

Some lawful permanent residents married to U.S. citizens may be eligible to naturalise
after **three years rather than five**.

This rule is frequently misunderstood.

Simply being married to a U.S. citizen does not automatically mean an applicant 
qualifies under the three-year provision.

The applicant must satisfy the applicable requirements, which generally include 
qualifying permanent residence and the marital-union requirements established by
immigration law.

For qualifying applicants under the three-year pathway, USCIS generally requires
at least **18 months of physical presence during the three-year period immediately
before filing**.

Special rules can apply in certain situations, including some VAWA-related naturalisation
cases.

## Can You File N-400 Before the Full Three or Five Years?

In certain cases, yes.

USCIS permits qualifying applicants using the standard five-year rule or the three-
year spouse-of-a-U.S.-citizen rule to file Form N-400 up to **90 calendar days before
completing the applicable continuous residence period**.

This is often called the **90-day early filing rule**.

But the rule is narrower than many people think.

It does not mean:

“I can apply three months before I meet every naturalisation requirement.”

The early filing provision relates to the applicable continuous residence requirement.
The applicant still must meet the remaining requirements when required by law.

Filing too early can result in denial.

## Continuous Residence vs. Physical Presence

These terms sound similar.

Legally, they are not the same.

Understanding the distinction is essential.

## **Continuous Residence**

Continuous residence generally concerns whether the United States remained the applicant’s
principal residence during the required statutory period.

Long trips abroad can create problems.

An applicant may have maintained a home, bank account and Green Card in the United
States and still face questions concerning continuous residence if they spent substantial
time outside the country.

USCIS specifically warns that lengthy absences can disrupt continuous residence.

## **Physical Presence**

Physical presence is more mathematical.

It concerns the actual amount of time the applicant was physically inside the United
States.

For the standard five-year naturalisation pathway, an applicant generally needs 
at least:

**30 months, or approximately 913 days, of physical presence during the relevant
five-year period.**

For qualifying applicants using the three-year marriage-based rule, the general 
requirement is:

**18 months during the relevant three-year period.**

An applicant can therefore satisfy continuous residence and still fail the physical-
presence requirement, or vice versa.

## Can International Travel Affect Naturalisation?

Yes.

Travel history is one of the most important parts of many N-400 cases.

Short trips generally do not create the same concerns as lengthy absences.

But longer periods outside the United States can affect eligibility.

A particularly important threshold involves absences lasting more than six months.

USCIS guidance states that an absence of **more than six months but less than one
year** can create a presumption that continuous residence was disrupted, depending
on the facts and applicable law. An absence of one year or more can create even 
more significant continuous-residence issues unless a recognised exception applies.

Applicants with extensive travel histories should calculate their time carefully.

Do not rely on memory.

Review:

 * passports;
 * airline records;
 * I-94 history where available;
 * travel itineraries;
 * work records;
 * tax records;
 * and other documentation.

A date error of several weeks may matter when an applicant is close to the statutory
physical-presence threshold.

## What Is Good Moral Character?

One of the most important and most misunderstood naturalisation requirements is **
good moral character**.

It does not mean USCIS expects an applicant to have lived a flawless life.

It means the applicant must satisfy the legal good-moral-character requirements 
during the applicable statutory period and, in some circumstances, conduct outside
that period can also become relevant to the overall assessment.

Potential issues can include matters involving:

 * criminal conduct;
 * certain arrests or convictions;
 * false testimony;
 * immigration fraud or misrepresentation;
 * failure to support dependants;
 * tax issues;
 * Selective Service issues;
 * unlawful voting;
 * false claims to U.S. citizenship;
 * and other conduct identified in immigration law.

Not every mistake results in automatic denial.

But applicants should not assume an old incident no longer matters simply because
it happened years ago.

The N-400 can cause USCIS to examine an applicant’s broader immigration and personal
history.

That makes naturalisation different from merely renewing a Green Card.

## Why Old Immigration Problems Can Reappear During Naturalisation

This is one of the most important strategic issues in an N-400 case.

When someone applies for naturalisation, USCIS may review the applicant’s underlying
immigration history.

That can include:

 * how permanent residence was obtained;
 * prior visa applications;
 * previous marriages;
 * employment history;
 * immigration petitions;
 * statements made to government agencies;
 * periods of absence;
 * arrests;
 * and information submitted in earlier immigration filings.

Imagine a person received permanent residence many years ago through marriage.

When that person applies for citizenship, USCIS may review information from the 
earlier marriage-based immigration process as part of assessing eligibility.

Or consider someone whose prior immigration application contained an inaccurate 
statement.

The N-400 interview may bring that issue back into focus.

This is why the most important part of preparing for citizenship can sometimes be
reviewing the applicant’s **past**, not completing the new form.

## Do You Need to Pay Taxes Before Applying for Citizenship?

Tax compliance can become relevant in naturalisation cases.

The N-400 asks questions relating to taxes, and USCIS instructions specifically 
recommend bringing IRS tax transcripts to the naturalisation interview in certain
circumstances, particularly where extended travel may raise continuous-residence
issues.

An applicant who owes taxes is not necessarily automatically ineligible for citizenship.

The circumstances matter.

Potential issues can include:

 * failing to file required tax returns;
 * claiming to be a nonresident for tax purposes;
 * unpaid tax obligations;
 * inconsistent tax and immigration records;
 * or failing to comply with a payment arrangement.

For some applicants, tax records can also help establish continued ties to the United
States.

Naturalisation therefore requires consistency across immigration, financial and 
personal records.

## What Is the N-400 Citizenship Test?

Most naturalisation applicants must demonstrate knowledge of:

 1. **English**, and
 2. **U.S. civics.**

USCIS explains that the English portion generally evaluates:

 * speaking;
 * reading;
 * and writing.

The civics portion tests knowledge of U.S. government and history.

However, exemptions and accommodations can apply to certain applicants because of
age, length of permanent residence, or qualifying disabilities.

## The 2025 Civics Test: What Applicants Need to Know in 2026

The naturalisation civics test changed significantly.

USCIS now provides a **2025 version of the naturalisation civics test**.

The official 2025 study materials contain **128 civics questions and answers**.

Under the 2025 test format, a USCIS officer may ask an applicant up to **20 questions**,
and the applicant must answer at least **12 correctly** to pass.

This differs materially from the older 100-question civics test format.

Applicants should therefore make sure they are studying the test version applicable
to their particular N-400 filing.

Some civics answers can also change after elections or appointments, so applicants
should verify current officeholders before their interview rather than relying exclusively
on an older printed study guide. USCIS specifically instructs applicants to provide
the name of the official serving at the time of the naturalisation interview.

Entrepreneur launching a startup

## What Is the 65/20 Rule?

Certain long-term permanent residents receive special consideration.

USCIS states that an applicant who is:

**65 years old or older**

and has been a lawful permanent resident for:

**20 years or more**

may study a reduced set of specifically designated civics questions and may take
the civics test in the language of their choice.

Under the 2025 civics test, qualifying 65/20 applicants are asked up to 10 questions
from the designated reduced pool and must answer at least six correctly.

Other age-and-residence-based exceptions may affect the English requirement as well.

Applicants who may qualify should determine which exemption applies before preparing
for the interview.

## What Happens at the N-400 Interview?

The naturalisation interview is not merely a citizenship quiz.

The USCIS officer generally reviews the N-400 with the applicant and asks questions
about the application and the applicant’s background.

USCIS describes the interview process as including review of the application followed
by English and civics testing where required.

The officer may ask about:

 * addresses;
 * employment;
 * travel;
 * marriage history;
 * children;
 * taxes;
 * immigration history;
 * arrests or citations;
 * Selective Service;
 * organisations or affiliations;
 * and the eligibility questions contained in the N-400.

The applicant’s spoken responses also form part of the English speaking assessment
unless an exemption applies.

The best preparation therefore involves much more than memorising civics answers.

An applicant should understand **their own N-400**.

## What Should You Bring to the Naturalisation Interview?

USCIS generally instructs applicants to bring items including:

 * the interview appointment notice;
 * Permanent Resident Card;
 * government-issued identification;
 * valid and expired passports;
 * and travel documents documenting absences from the United States.

Additional documents may be required depending on the case.

For some applicants, relevant evidence may also include:

 * tax transcripts;
 * marriage certificates;
 * spouse’s proof of citizenship;
 * divorce records;
 * court dispositions;
 * Selective Service records;
 * child-support records;
 * travel documentation;
 * or other documents supporting eligibility.

The interview preparation should be tailored to the issues actually present in the
case.

## What Happens if You Fail the Citizenship Test?

Failing part of the English or civics examination does not necessarily mean the 
entire naturalisation process is immediately over.

USCIS procedures may permit an applicant another opportunity to be tested on the
portion that was not passed, subject to applicable rules.

But repeated failure can ultimately result in denial.

Applicants should therefore prepare for the test seriously.

For many people, the civics questions themselves are manageable.

The more difficult part can be simultaneously answering questions about years of
immigration history while communicating clearly in English.

## Can USCIS Ask About Arrests That Were Dismissed?

Potentially, yes.

A dismissed case is not necessarily irrelevant to immigration law.

Naturalisation applicants should carefully review all required questions relating
to arrests, citations, charges and criminal conduct.

The immigration consequences of a criminal matter do not always correspond exactly
with the criminal-court outcome.

For example:

**“The case was dismissed”**

does not necessarily answer:

**“Does USCIS need to know about it?”**

Applicants with criminal history should obtain and review appropriate records before
filing rather than trying to reconstruct the facts during the citizenship interview.

## What About Traffic Tickets?

Not every traffic violation creates a naturalisation problem.

But the details can matter.

Applicants should pay particular attention to issues involving:

 * alcohol or drugs;
 * reckless conduct;
 * driving without a valid licence;
 * outstanding warrants;
 * unpaid fines;
 * repeated violations;
 * or incidents connected with an arrest.

The important principle is disclosure.

Do not decide that something is “too minor to matter” before reviewing what the 
N-400 actually asks.

## Selective Service and Form N-400

Selective Service can become an issue for certain naturalisation applicants who 
were required to register but did not.

The impact depends heavily on:

 * the applicant’s age;
 * immigration status during the relevant period;
 * when the applicant entered the United States;
 * whether registration was legally required;
 * and why registration did not occur.

Applicants should not guess.

Determine first whether the requirement applied.

For individuals whose failure to register may affect the good-moral-character analysis,
filing strategy and timing can matter.

## Does Having a Green Card Guarantee Citizenship?

No.

This is one of the most important points in the naturalisation process.

A Green Card means the person has lawful permanent resident status.

It does not automatically establish that every naturalisation requirement has been
satisfied.

USCIS independently evaluates eligibility when reviewing Form N-400.

An applicant may have held permanent residence for many years and still encounter
naturalisation problems involving:

 * residence;
 * travel;
 * criminal history;
 * tax compliance;
 * prior immigration conduct;
 * good moral character;
 * or eligibility for the status through which permanent residence was originally
   obtained.

Citizenship therefore involves a **new adjudication**.

## How Much Does Form N-400 Cost?

USCIS currently lists different N-400 filing fees depending on the filing method.

The standard fee is currently:

**$710 for online filing**

and

**$760 for paper filing.**

There is no separate biometric-services fee.

USCIS also provides a **reduced $380 N-400 fee** for qualifying applicants whose
household income falls within the applicable federal poverty guideline parameters.
Certain applicants may also qualify for a full fee waiver, and qualifying military
applicants can file without the standard N-400 filing fee.

Fees and eligibility rules can change.

Applicants should verify the current USCIS fee schedule immediately before filing.

## Should You File N-400 Online or by Mail?

USCIS allows many N-400 applicants to file online.

Online filing may provide benefits such as:

 * electronic submission;
 * online case tracking;
 * document uploads;
 * easier access to notices;
 * and a lower standard filing fee.

Paper filing remains available for applicable cases, and some fee-reduction or fee-
waiver situations require special filing procedures.

The better choice depends on the applicant’s circumstances.

The filing method is less important than ensuring the application itself is complete,
accurate and strategically prepared.

## What Happens After Filing Form N-400?

A typical naturalisation case proceeds through several stages.

## **1. USCIS Receipt**

After accepting the application, USCIS issues a receipt notice.

Applicants should preserve the receipt number and keep their address current with
USCIS.

## **2. Biometrics, if Required**

USCIS may schedule a biometrics appointment.

The agency can use fingerprints for FBI background checks and other identity and
security purposes.

## **3. Background Review**

USCIS reviews the application and relevant records.

## **4. Naturalisation Interview**

The applicant attends an interview with a USCIS officer.

## **5. English and Civics Testing**

Unless an exemption or waiver applies, the applicant completes the required examination.

## **6. USCIS Decision**

USCIS may:

 * approve the application;
 * continue the application while requesting additional information;
 * or deny it.

## **7. Oath Ceremony**

If approved, the applicant completes the naturalisation process by taking the Oath
of Allegiance.

USCIS then issues the **Certificate of Naturalization**.

## How Long Does Form N-400 Take in 2026?

There is no single processing time that applies to every applicant or USCIS office.

USCIS historical FY2026 data through May 31, 2026 shows a national median processing
time of approximately **6.9 months for non-military N-400 naturalisation applications**.

Military naturalisation applications had a historical national median of approximately**
3.1 months** during the same reporting period.

These are historical national medians.

They are **not guarantees**.

Actual processing can depend on:

 * field office workload;
 * background checks;
 * requests for evidence;
 * interview scheduling;
 * case complexity;
 * residence issues;
 * criminal or immigration history;
 * and whether additional review is required.

Applicants should use USCIS’s current case-processing tools for individual estimates
rather than assuming that a national median predicts their case.

## What Happens if Form N-400 Is Denied?

USCIS may continue a naturalisation case rather than immediately approve or deny
it.

This can happen when:

 * additional evidence is required;
 * an eligibility issue needs further review;
 * the applicant did not pass part of the examination;
 * or USCIS needs clarification concerning the application.

A request for additional documentation should be treated carefully.

The strongest response directly addresses the issue USCIS identified and provides
evidence in a clear, organised manner.

Submitting hundreds of pages that do not answer the question is rarely an effective
strategy.

## Common N-400 Mistakes

## **1. Applying Because the Green Card Is Five Years Old**

Five years of permanent residence does not automatically establish naturalisation
eligibility.

Residence, physical presence, good moral character and other requirements still 
matter.

## **2. Miscalculating Travel**

Applicants commonly underestimate international travel or forget older trips.

## **3. Assuming Marriage Automatically Creates Three-Year Eligibility**

The three-year rule has additional requirements.

## **4. Ignoring Old Criminal Matters**

Dismissals, expungements and old convictions should be reviewed carefully.

## **5. Failing to Review Tax History**

Tax records can reveal issues relevant to residence and good moral character.

## **6. Studying the Wrong Civics Test**

Applicants should prepare using the USCIS test version applicable to their filing.

## **7. Memorising the N-400 Without Understanding It**

At the interview, the officer can ask questions about the applicant’s actual history.

## **8. Giving an Answer That Conflicts With an Older Immigration Filing**

USCIS may compare information across multiple applications.

## **9. Assuming a Green Card Means the Original Immigration Case Can Never Be Revisited**

Naturalisation can involve review of the underlying immigration history.

## **10. Filing Without Assessing the Downside**

For straightforward cases, N-400 preparation may be relatively simple.

For complicated cases, analysing risk before filing can be the most important part
of the process.

## A Real-World Example: From Marriage Green Card to Citizenship

Consider someone who became a lawful permanent resident through marriage to a U.
S. citizen.

Years later, that person wants to naturalise.

The question is not simply whether three years have passed.

The applicant may need to establish that the applicable requirements for the three-
year naturalisation pathway have been satisfied.

USCIS may review:

 * the applicant’s permanent residence;
 * marriage history;
 * continuing marital relationship where legally required;
 * travel outside the United States;
 * physical presence;
 * taxes;
 * good moral character;
 * and information from the underlying immigration process.

The case therefore connects directly to earlier stages of the immigration journey:

**I-130**

↓

**I-485**

↓

**Conditional Residence, if applicable**

↓

**I-751, if applicable**

↓

**Permanent Residence**

↓

**N-400**

↓

**Naturalisation**

For many families, citizenship is not a separate immigration story.

It is the final chapter of the same one.

## The Naturalisation Interview Is Really a Consistency Test

Many applicants think the most difficult part of becoming a citizen will be remembering
facts about American government.

Often, the more important challenge is consistency.

The officer has the N-400.

The government may also have years of immigration records.

The applicant has their memory.

Those three sources should tell the same story.

Addresses should make sense.

Travel dates should make sense.

Marriage history should make sense.

Employment history should make sense.

Tax filings should make sense.

Previous immigration applications should make sense.

Where they do not, the applicant should understand why before attending the interview.

## Attorney Perspective: Citizenship Requires Looking Back Before Moving Forward

Naturalisation is forward-looking.

The applicant wants to become a U.S. citizen.

But the government may need to look backward before granting that request.

That is what makes an N-400 different from many routine government applications.

A person may have lived in the United States for ten, twenty or thirty years.

Yet an old immigration filing, lengthy trip, criminal case, tax decision or statement
made years earlier can still become relevant.

For straightforward applicants, naturalisation can be a relatively predictable process.

For applicants with complicated histories, the best strategy is often to identify
potential issues **before USCIS does**.

The objective is not merely to determine whether the N-400 can be filed.

The objective is to understand whether the applicant is legally prepared for the
scrutiny that filing can bring.

_Business owner working on her newly open cafe. From concept to reality. _

## Form N-400 Checklist

Before filing, consider reviewing the following.

## **Basic Eligibility**

 * At least 18 years old, unless a special provision applies
 * Lawful permanent resident status confirmed
 * Applicable three-year, five-year or other naturalisation category identified
 * Correct early-filing date calculated
 * Continuous residence requirement reviewed
 * Physical presence requirement calculated
 * State or USCIS district residence requirement reviewed

## **Immigration History**

 * Permanent Resident Card reviewed
 * Previous immigration filings reviewed
 * Immigration status history reviewed
 * Prior petitions and applications checked for consistency
 * Any immigration violations identified

## **Travel**

 * All international trips listed
 * Passport stamps reviewed
 * Trips longer than six months analysed
 * Physical presence total calculated
 * Possible continuous-residence issues addressed

## **Personal History**

 * Current and prior marriages reviewed
 * Children listed accurately
 * Employment history reviewed
 * Address history reviewed
 * Tax filing history checked

## **Criminal and Compliance Issues**

 * Arrests and citations reviewed
 * Certified court dispositions obtained where needed
 * Probation or sentence completion verified
 * Selective Service issues considered
 * Tax obligations reviewed
 * Child-support obligations reviewed where applicable

## **Interview Preparation**

 * N-400 reviewed line by line
 * Applicable English requirement identified
 * Correct civics test studied
 * Current civics answers checked
 * Supporting documents organised

## The Bigger Picture

For many immigrants, naturalisation is the conclusion of a process that has lasted
years.

It may begin with:

**A family relationship**

↓

**Form I-130**

↓

**Adjustment of Status through Form I-485**

↓

**Permanent Residence**

↓

**Removal of Conditions through Form I-751, where required**

↓

**Form N-400**

↓

**Naturalisation Interview**

↓

**Oath of Allegiance**

↓

**U.S. Citizenship**

Each stage creates records.

And those records can follow an applicant into the next stage.

That is why immigration strategy should not be built one form at a time.

A well-prepared I-130 can matter later.

A well-prepared I-485 can matter later.

A correctly handled I-751 can matter later.

And when the applicant eventually files Form N-400, years of immigration history
may come together in one final review.

## Final Takeaway

**Form N-400 is the application that begins the final legal process through which
many permanent residents become U.S. citizens.**

But citizenship is not granted simply because enough time has passed.

USCIS may examine:

 * how long the applicant has been a permanent resident;
 * how much time the applicant has physically spent in the United States;
 * international travel;
 * good moral character;
 * tax and criminal history;
 * prior immigration records;
 * English ability;
 * civics knowledge;
 * and whether every applicable naturalisation requirement has been satisfied.

For a straightforward applicant, the process may feel like the natural conclusion
of permanent residence.

For someone with complicated travel, immigration, criminal or tax history, the N-
400 deserves much more careful analysis.

Because the most important question is not:

**“Can I submit the form?”**

It is:

**“Am I ready for USCIS to review the history behind it?”**

## How Lum Law Group Can Help

Becoming a U.S. citizen is an important legal and personal milestone.

Lum Law Group can help permanent residents evaluate naturalisation eligibility, 
review travel and immigration history, prepare Form N-400, identify potential issues
before filing, prepare for the naturalisation interview and respond to complications
that may arise during the citizenship process.

**Immigration law is highly fact-specific. This article provides general educational
information and does not constitute legal advice.**

![](https://www.lumlawgroup.com/wp-content/uploads/2026/07/A.Justin_Lum.webp)

### About A. Justin Lum

A. Justin Lum has been practicing law since 1993, with more than 30 years of experience
serving clients across a wide range of legal matters. A graduate of the University
of California, Berkeley and UC Davis School of Law, he is also a past President 
of the Southern California Chinese Lawyers Association, continuing a proud family
legacy of leadership in the legal profession.

### Attorney Insight

 At Lum Law Group, we frequently speak with business owners who have already invested
in branding, websites, packaging, and marketing before discovering potential trademark
issues. Addressing these concerns early in the branding process may provide greater
flexibility and help businesses make informed decisions before committing significant
resources. Because every trademark is unique, evaluating eligibility often requires
a careful review of the proposed mark, the goods or services involved, and any potentially
conflicting registrations.

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### Frequently Asked Questions

 What is Form N-400?

Form N-400 is the application most lawful permanent residents use to apply for U.
S. citizenship through naturalisation.

 [     Get Started  ](https://www.lumlawgroup.com/contact-us/)

 How many years do I need a Green Card before applying for citizenship?

Many applicants qualify after five years as lawful permanent residents. Certain 
qualifying spouses of U.S. citizens may qualify under a three-year naturalisation
provision. Other specialised rules also exist.

 [     Get Started  ](https://www.lumlawgroup.com/contact-us/)

 Can I apply for citizenship 90 days early?

Certain applicants under the standard five-year and qualifying three-year pathways
may file up to 90 calendar days before completing the applicable permanent residence
period, provided the requirements for early filing are satisfied.

 [     Get Started  ](https://www.lumlawgroup.com/contact-us/)

 How much physical presence do I need?

Under the general five-year rule, applicants normally need at least 30 months of
physical presence during the five years before filing. Certain applicants under 
the three-year spouse provision generally need at least 18 months during the relevant
three-year period.

 [     Get Started  ](https://www.lumlawgroup.com/contact-us/)

 Can travelling outside the United States affect citizenship?

Yes. Extended absences can affect both continuous residence and physical presence.

 [     Get Started  ](https://www.lumlawgroup.com/contact-us/)

 How long does N-400 take?

USCIS historical FY2026 data through May 31, 2026 showed a national median of approximately
6.9 months for ordinary N-400 naturalisation cases, but individual cases can take
longer or shorter.

 [     Get Started  ](https://www.lumlawgroup.com/contact-us/)

 What is the citizenship test in 2026?

USCIS historical FY2026 data through May 31, 2026 showed a national median of approximately
6.9 months for ordinary N-400 naturalisation cases, but individual cases can take
longer or shorter.

 [     Get Started  ](https://www.lumlawgroup.com/contact-us/)

 What is the citizenship test in 2026?

USCIS’s 2025 civics test contains 128 potential questions. Under that format, an
officer may ask up to 20 questions and the applicant must answer at least 12 correctly.
Applicants should confirm which test version applies to their filing.

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 Do I need to speak English to become a citizen?

Most applicants must demonstrate English speaking, reading and writing ability, 
but age-and-residence exemptions and disability-based exceptions may apply.

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 Can I apply if I have a criminal record?

Possibly. The effect depends on the type of offence, timing, disposition and other
circumstances. Criminal history should be carefully reviewed before filing.

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 Can USCIS review my old Green Card case during citizenship?

Yes. USCIS may review immigration history when determining whether an applicant 
is eligible for naturalisation.

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 Does N-400 approval make me a citizen?

Not immediately. An approved applicant generally becomes a citizen after completing
the Oath of Allegiance at the naturalisation ceremony.

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