When applying for many U.S. immigration benefits, financial sponsorship plays a critical role. One of the most important documents used in family-based immigration cases is the affidavit of support. This legal document shows that an immigrant will have financial support in the United States and is unlikely to become dependent on public benefits.
For many applicants and sponsors, the process can be confusing. Questioning “what is affidavit of support,” “who must file Form I-864,” and “what income is required for an affidavit of financial support” is extremely common.
In this guide, we explain how the immigration affidavit of support works, when Form I-864 is required, and what sponsors need to know before filing.
What Is an Affidavit of Support?
An affidavit of support is a legally binding document used in U.S. immigration cases to show that an immigrant will have adequate financial support after entering the United States or receiving permanent residence.
In most family-based immigration cases, the sponsor—usually a U.S. citizen or lawful permanent resident—must submit Form I-864 AoS to demonstrate financial responsibility for the immigrant.
The purpose of the immigration affidavit of support is to confirm that the immigrant will not become a “public charge,” meaning someone who depends primarily on government assistance.
By signing this form, the sponsor agrees to financially support the immigrant if necessary.
Why Immigration Authorities Require an Affidavit of Support
The U.S. immigration system requires financial sponsorship because immigration law aims to ensure that newcomers can support themselves or have reliable support from family members.
The affidavit of financial support serves several purposes:
- Demonstrates that the immigrant has financial backing
- Protects government resources
- Confirms the sponsor has enough income to support the immigrant
- Creates a legally enforceable financial commitment
Because the aos carries legal obligations, sponsors should understand the requirements before signing.
What Is Form I-864 Affidavit of Support?
The Form I-864 Affidavit of Support is the official document used in most family-based immigration cases.
This form is submitted to the U.S. government—typically through the U.S. Citizenship and Immigration Services (USCIS) or the National Visa Center (NVC)—to show that the sponsor has sufficient financial resources.
The Form I-864 aos is required in cases such as:
- Family-based green card applications
- Adjustment of status cases in the United States
- Consular processing for immigrant visas
- Certain employment-based immigration cases involving family relationships
Without a properly completed immigration AoS, many green card applications cannot be approved.
Who Must File an Affidavit of Support?
In most cases, the person who files the immigrant petition must also submit the affidavit of support.
Common sponsors include:
- U.S. citizen spouses
- Parents sponsoring children
- Adult children sponsoring parents
- U.S. citizens sponsoring siblings
- Permanent residents sponsoring spouses or children
The sponsor must generally meet certain financial requirements to qualify.
If the primary sponsor does not earn enough income, a joint sponsor may sometimes submit an additional affidavit of financial support.
Income Requirements for Form I-864 Affidavit of Support
One of the most important parts of the Form I-864 is demonstrating sufficient income.
In most cases, the sponsor must show income equal to at least 125% of the Federal Poverty Guidelines for their household size.
Household size may include:
- The sponsor
- The immigrant being sponsored
- Any dependents listed on the sponsor’s tax return
- Other immigrants previously sponsored under Form I-864
- Household members whose income is included
For active-duty military sponsors petitioning for a spouse or child, the income requirement may be 100% of the Federal Poverty Guidelines instead of 125%.
If the sponsor’s income is insufficient, they may use:
- A joint sponsor
- Household member income
- Certain assets
Understanding the financial requirements is essential when preparing an immigration affidavit of support.
Affidavit of Financial Support vs. Other Immigration Forms
People often confuse the Form I-864 affidavit of support with other forms of financial sponsorship.
Another commonly referenced form is Form I-134 Affidavit of Support.
The difference is important:
Form I-864
Used primarily for green card and immigrant visa applications.
This form creates a legally enforceable financial obligation.
Form I-134
Used for certain temporary visas such as fiancé visas or humanitarian cases.
This form is generally less legally binding.
When applying for permanent residence through family sponsorship, the Form I-864 AoS is usually required.
Affidavit of Support Necessary Documents
When filing an affidavit of support, sponsors must submit supporting documentation to prove financial eligibility.
Typical documents include:
1. Federal Tax Returns
Sponsors usually submit the most recent federal tax return, and sometimes the last three years of tax returns.
2. W-2 Forms or 1099 Forms
These documents verify employment income.
3. Proof of Current Employment
Examples include:
- Employment verification letters
- Pay stubs
- Job contracts
4. Evidence of Assets (If Needed)
If income is not enough, sponsors may use certain assets such as:
- Bank account balances
- Real estate equity
- Investment accounts
5. Proof of U.S. Citizenship or Permanent Residence
Sponsors must show they are either:
- U.S. citizens
- Lawful permanent residents
Submitting complete documentation is critical when preparing an affidavit of financial support.
What Happens If Income Is Not High Enough?
If the sponsor does not meet the required income level for the Form I-864 affidavit of support, there may still be options.
Joint Sponsor
A joint sponsor is another qualified individual who agrees to accept financial responsibility for the immigrant.
The joint sponsor must:
- Be at least 18 years old
- Be a U.S. citizen or permanent resident
- Meet the income requirements independently
Household Member Income
Sometimes a household member can contribute income by completing a related form and agreeing to share financial responsibility.
These strategies can help strengthen an immigration affidavit of support when the primary sponsor does not meet income guidelines.
Legal Responsibilities of the Sponsor
Signing an affidavit of support is not simply a formality. It creates real legal obligations.
Sponsors who sign Form I-864 affidavit of support agree to financially support the immigrant if necessary.
This obligation generally lasts until one of the following occurs:
- The immigrant becomes a U.S. citizen
- The immigrant earns 40 qualifying quarters of work (approximately 10 years)
- The immigrant permanently leaves the United States
- The immigrant dies
Divorce does not automatically terminate the financial obligation.
In some cases, government agencies can seek reimbursement from sponsors if the immigrant receives certain public benefits.
For this reason, sponsors should carefully understand the responsibilities associated with an affidavit of financial support.
Common Mistakes When Filing an Affidavit of Support
Errors in the Form I-864 affidavit of support can delay immigration applications.
Some of the most common issues include:
Incorrect Household Size
Sponsors sometimes forget to include previously sponsored immigrants or dependents.
Missing Tax Documents
Incomplete tax documentation can lead to requests for additional evidence.
Income Below Required Threshold
Sponsors may submit the form without realizing they do not meet the required income level.
Incomplete Signatures
Unsigned forms or incorrect versions of the form may cause processing delays.
Carefully reviewing all documentation can help avoid these problems when submitting an immigration affidavit of support.
When an Immigration Attorney Can Help
Preparing an affidavit of support may appear straightforward, but financial sponsorship rules can be complicated.
Legal guidance can help in situations such as:
- Income that fluctuates year to year
- Using assets instead of income
- Joint sponsor arrangements
- Complex family immigration cases
- Requests for additional evidence from USCIS
An experienced immigration attorney can review the Form I-864 affidavit of support, verify documentation, and help avoid delays in the immigration process.
Immigration Support From Ybarra Maldonado Law Group
Understanding the requirements for an affidavit of support is an important step in many immigration cases. Financial sponsorship rules, income thresholds, and documentation requirements can create challenges for families trying to reunite in the United States.
At Ybarra Maldonado Law Group, our team helps individuals and families navigate complex immigration processes, including preparing Form I-864 affidavit of support and other financial sponsorship documents.
We work with clients to review eligibility, organize required documentation, and address potential issues before they delay an immigration case.
If you have questions about an immigration affidavit of support, sponsorship requirements, or family-based immigration, speaking with an experienced immigration attorney can help you understand your options and move forward with confidence.
Frequently Asked Questions
What is affidavit of support in immigration?
An affidavit of support is a legal document used in U.S. immigration cases to show that a sponsor has the financial ability to support an immigrant. The most common version is Form I-864 affidavit of support, which is required in many family-based green card applications.
Who files Form I-864 affidavit of support?
The person who files the immigrant petition—often a U.S. citizen or permanent resident family member—usually submits the Form I-864 affidavit of support.
What income is required for an affidavit of financial support?
Sponsors must typically show income equal to 125% of the Federal Poverty Guidelines for their household size, though certain military sponsors may qualify with lower thresholds.
Can someone else help with an affidavit of support?
Yes. If the main sponsor does not meet the income requirement, a joint sponsor may file an additional affidavit of financial support to support the immigrant.
Is an affidavit of support legally binding?
Yes. The Form I-864 affidavit of support creates a legally enforceable financial obligation that may last until the immigrant becomes a U.S. citizen or meets other conditions specified under immigration law.