How to Fill Out Form I-864 Affidavit of Support (Step-by-Step Guide)

Filling out Form I-864, Affidavit of Support is one of the most important, and confusing, steps in a family-based Green Card application. Many sponsors worry about income requirements, household size, and whether a mistake could delay or jeopardize the case.

Because Form I-864 carries serious financial and legal obligations, even small errors can result in Requests for Evidence (RFEs), delays, or denial of the immigration application. This guide provides a section-by-section breakdown of Affidavit of Support I-864, along with key rules, requirements, common pitfalls to avoid, who must file, how income rules work, how to complete each part of the form, what sponsor documents are required, and what to do if you don’t meet the income threshold.

What Is Form I-864, Affidavit of Support?

Form I-864, also called the Affidavit of Support, is a financial sponsorship form required in most family-based green card cases. Its purpose is to show the U.S. government that the sponsored immigrant will have adequate financial support and is unlikely to rely on certain public benefits.

When a sponsor signs Form I-864, they agree to:

Financially support the immigrant if needed, and
Maintain income at or above a government-set minimum level

This obligation typically lasts until the immigrant:

Becomes a U.S. citizen,
Earns enough qualifying work credits,
Leaves the United States permanently, or
Passes away.

Who Must File Form I-864?

The Primary Sponsor

The primary sponsor is the person who filed the immigrant petition (usually Form I-130). The primary sponsor:

Must be a U.S. citizen or lawful permanent resident
Must be at least 18 years old
Must submit Form I-864 even if they have no income

Importantly, a joint sponsor does not replace the primary sponsor. The petitioner must always file their own I-864.

Joint Sponsors (When Needed)

A joint sponsor may help when the primary sponsor’s income does not meet the requirements. A joint sponsor:

Files a separate Form I-864
Must independently meet the income requirement
Does not need to be related to the immigrant

Friends or extended family members may qualify as joint sponsors if they meet the criteria.

Household Members and Form I-864A

In some cases, a sponsor may combine income with a household member using Form I-864A. This option is typically used when:

The household member lives with the sponsor, and
Their income will continue after the immigrant becomes a permanent resident

This is different from using a joint sponsor and has specific eligibility rules.

I-864 Income Requirements Explained

One of the most common concerns with the Affidavit of Support I-864 is whether the sponsor earns enough income.

USCIS evaluates income based on:

Household size, and
Federal poverty guidelines published by the U.S. government

Because income thresholds change annually, it’s best to understand how the calculation works rather than focus on exact dollar amounts.

How Household Size Affects I-864 Income Requirements

Household size plays a critical role in determining whether a sponsor meets the income requirements for Form I-864. As household size increases, the minimum income threshold rises accordingly, often placing otherwise qualified sponsors below the required level.

Importantly, household size includes more individuals than many sponsors expect, which is why miscalculations are one of the most frequent causes of Requests for Evidence (RFEs).

The table below outlines how household size impacts income requirements and the most common solutions when a sponsor’s income falls short.

Household Size	Who Is Included	How Income Is Assessed	Common Solution if Income Is Low
2	Sponsor + sponsored spouse	Must meet the poverty guideline for a 2-person household	Use qualifying assets or a joint sponsor
3	Sponsor, spouse, and 1 dependent	Higher income required than a household of 2	Joint sponsor or household member via Form I-864A
4	Sponsor, spouse, and 2 dependents	Income threshold increases with each additional person	Assets or joint sponsor
5+	Larger families or prior sponsorship obligations	Significantly higher income requirement	Joint sponsorship is common

Why Household Size Is Often Miscalculated

Sponsors must include:

Themselves
The sponsored immigrant(s)
Dependents listed on tax returns
Anyone previously sponsored on Form I-864 whose obligation has not ended
Household members contributing income (even if not dependents)

Failing to include all required individuals can result in incorrect income calculations, triggering RFEs or outright rejection of the affidavit.

Key takeaway: Always calculate household size carefully before assessing income eligibility. When in doubt, sponsors should reassess using prior sponsorships and tax dependency rules to avoid costly delays.

Understanding the 125% Poverty Guideline

In most family-based immigration cases, sponsors must demonstrate income at 125% of the Federal Poverty Guidelines, based on their household size. These U.S. Department of Health and Human Services (HHS) Poverty Guidelines are updated annually and are used by USCIS to assess financial eligibility for Form I-864.

A limited exception applies to active-duty U.S. military members who are sponsoring a spouse or unmarried child. In those cases, the sponsor may qualify by meeting 100% of the Federal Poverty Guideline instead of the standard 125%.

What Counts as “Income” for Form I-864?

For I-864 purposes:

USCIS focuses on current, ongoing income
Tax returns show history, but pay stubs or employer letters show present ability
Self-employment income must be well-documented
The immigrant’s income usually does not count unless it will continue from the same lawful source

Step-by-Step: How to Fill Out Form I-864

Part 1: Basis for Filing Affidavit of Support

Select the correct basis for filing (petitioning sponsor, joint sponsor, substitute sponsor, or household member).

Incorrect selection here can invalidate the entire form.

Part 2: Information About the Principal Immigrant

Provide accurate information for the primary beneficiary, including:

Full legal name
Current address
USCIS receipt number or case number

Ensure names and spellings match the underlying petition exactly.

Part 3: Information About the Immigrants You Are Sponsoring

List all additional immigrants included under the same affidavit, if applicable (such as derivative beneficiaries).

Part 4: Information About the Sponsor

This section collects:

Sponsor’s personal details
Citizenship or residency status
Employment and mailing address

Any discrepancy between this section and supporting documents may trigger an RFE.

Part 5: Sponsor’s Household Size

Household size must include:

The sponsor
The sponsored immigrant(s)
Dependents claimed on taxes
Anyone previously sponsored and still under obligation
Household members contributing income

Household size miscalculations are one of the most common Form I-864 errors.

Part 6: Sponsor’s Income and Employment

Report:

Current individual annual income
Employer or self-employment details
Income listed on the most recent tax return

USCIS prioritizes current income, but tax returns are used to verify consistency and credibility.

Part 7: Use of Assets to Qualify (If Required)

If income is below the required threshold, assets may be used. Acceptable assets include:

Cash and savings
Real estate equity
Stocks and bonds

Assets must generally equal three to five times the income shortfall, depending on the immigrant’s relationship to the sponsor.

Part 8: Sponsor’s Contract, Statement, and Signature

This is the legally binding portion of the form.

The sponsor must sign by hand (or properly via electronic submission where allowed)
Unsigned or improperly signed forms are automatically rejected

Parts 9–11: Interpreter, Preparer, and Additional Information

Complete these sections if:

An interpreter assisted with the form
A preparer completed the form on the sponsor’s behalf
Additional explanations are needed

Leaving these blank when applicable can result in rejection.

Required Sponsor Documents for Form I-864

Most sponsors submit copies of:

Most recent federal tax return or IRS tax transcript
W-2s or 1099s (if applicable)
Proof of current employment
Proof of U.S. citizenship or permanent residence
Joint sponsor documents (if applicable)

You can also review our green card application documents complete checklist before you file to make sure you have all the necessary paperwork before submitting Form I-864.

Common I-864 Mistakes That Cause Delays or RFEs

The Form I-864 Affidavit of Support is one of the most scrutinized documents in a Green Card application. Errors or omissions can lead USCIS to issue a Request for Evidence (RFE), which can delay your case and add unnecessary stress. Some of the most common mistakes include:

1. Incorrect Household Size
  Claiming the wrong number of dependents or family members can cause USCIS to question whether the sponsor meets the income requirement. Always double-check household size calculations.
2. Mismatch Between Income Claimed and Tax Records
  If the income reported on Form I-864 does not match your IRS tax transcripts, USCIS may flag your application. Always ensure reported income aligns exactly with your official tax documents.
3. Missing Signatures
  An unsigned form is automatically incomplete. Both the sponsor and any joint sponsors must sign the I-864 before submission.
4. Using an Outdated Version of Form I-864
  USCIS only accepts the most current version of the form. Using an older version can result in an RFE or outright rejection.
5. Submitting Insufficient Asset Documentation
  If you are relying on assets to meet income requirements, provide clear, verifiable evidence (bank statements, property appraisals, etc.) to avoid questions.
6. Failing to Include Required Supporting Evidence
  Supporting documents like W-2s, pay stubs, or employment letters must be included. Omitting these can trigger a Green Card RFE, giving USCIS a reason to ask for clarification or additional evidence.

What If You Do Not Meet The Income Requirements?

Failing to meet the required income threshold for Form I-864 does not automatically result in denial. USCIS allows several alternatives that can help sponsors satisfy the financial requirements, depending on the circumstances.

Using a Joint Sponsor

A qualifying joint sponsor is one of the most common and effective solutions when a petitioning sponsor’s income falls below the required level. A joint sponsor must:

Be a U.S. citizen or lawful permanent resident
Meet the income requirements independently based on their own household size
Submit a separate Form I-864 with supporting financial documents

Using Assets Instead of Income

When income alone is insufficient, certain qualifying assets may be used to bridge the gap. These can include:

Cash savings and checking accounts
Real estate equity
Stocks, bonds, or other readily convertible assets

Assets must meet specific valuation and liquidity rules, and in most cases must equal several times the income shortfall, depending on the relationship between the sponsor and the immigrant.

When a Sponsor Support Review May Help

Cases involving self-employment income, fluctuating earnings, prior sponsorship obligations, or asset-based qualification often benefit from a professional attorney review before submission. Reviewing financial documentation and household size calculations in advance can help reduce the risk of RFEs, delays, or rejections.

Conclusion

Form I-864 is more than a supporting document, it is a legally enforceable financial commitment. Completing it accurately requires careful attention to household size, income calculations, and documentation.

Before submission, sponsors should:

Review all entries for consistency
Confirm income meets current guidelines
Ensure all required signatures and documents are included

When income situations are complex or when RFEs have occurred previously, seeking legal guidance can help prevent costly delays or denials.

Frequently Asked Questions

Is Form I-864 legally binding?

Yes. It creates a legally enforceable financial obligation between the sponsor and the U.S. government.

How long does the I-864 obligation last?

It generally lasts until the immigrant becomes a U.S. citizen, earns sufficient work credits, leaves the U.S. permanently, or passes away.

Can a joint sponsor live in a different state?

Yes, as long as they meet all eligibility requirements.

Can I withdraw my I-864 after approval?

Once the immigrant becomes a permanent resident, the obligation generally cannot be withdrawn.

Can I sponsor more than one immigrant at the same time?

Yes, but each sponsored immigrant increases your household size and income requirement.

This information is for general educational purposes only and is not legal advice. Reading this page does not create an attorney–client relationship. Immigration laws change frequently, and your situation may require personalized guidance.