An affidavit of support is a legally binding document in which a sponsor agrees to provide financial support to a visa applicant (the beneficiary) to ensure they will not become a public charge while in the host country. In the United States, this is most commonly executed on Form I-864 for family-based immigration, but similar affidavits are required for fiancé visas (K-1), some employment-based petitions, and certain foreign visa programs such as those in Canada, Australia, and the United Kingdom. The affidavit is not a casual promise; it is a contract that can be enforced by the beneficiary or the government, and it remains in effect until the beneficiary becomes a U.S. citizen, earns 40 qualifying quarters of work, or permanently leaves the country. Because the stakes are high—including potential legal action to recover means-tested public benefits—the affidavit must be executed with precision, supported by extensive documentation, and filed with the correct immigration authority. Even a minor omission can lead to a Request for Evidence (RFE) or a flat denial, so understanding the requirements before you start is essential.
Key Rule: For U.S. immigration, the sponsor's income must meet at least 125% of the Federal Poverty Guidelines based on household size. If it does not, the sponsor can use assets (3x the shortfall) or find a joint sponsor. The affidavit is legally enforceable for up to 10 years or until the beneficiary naturalizes.
What Is an Affidavit of Support and Who Needs to File It?
An affidavit of support is a sworn statement filed by a sponsor—typically a U.S. citizen or lawful permanent resident—to demonstrate that they have sufficient income and resources to support the intending immigrant. It is required for almost all family-based green card applications, including spouses, parents, and children of U.S. citizens. It is also required for some employment-based cases where a relative owns the petitioning company, and for K-1 fiancé visas (Form I-134 for non-immigrant, though I-864 for adjustment). The purpose is to assure the U.S. government that the immigrant will not rely on federal or state means-tested benefits. The affidavit creates a contractual obligation; if the sponsor fails to provide support, the immigrant can sue the sponsor. In foreign visa systems, similar documents—often called "sponsorship letters" or "financial undertaking declarations"—serve the same purpose but may have different income thresholds.
Key Eligibility Requirements for Sponsors
Not everyone can serve as a sponsor. You must meet specific criteria to file a valid affidavit of support. The table below summarizes the core requirements for U.S. Form I-864.
| Requirement | Details |
|---|---|
| Citizenship / Status | Must be a U.S. citizen, lawful permanent resident, or qualifying U.S. national. |
| Age | Must be at least 18 years old. |
| Domicile | Must be domiciled in the United States (or intend to establish domicile). |
| Income Threshold | Current annual income must be at least 125% of the Federal Poverty Guidelines for your household size. |
| Relationship to Beneficiary | Must be the petitioner (sponsor) in most family-based cases; joint sponsors are allowed. |
For foreign affidavits, the requirements vary widely. For example, Canada requires a sponsor to meet a minimum necessary income based on family size, while the UK requires a minimum annual income of £18,600 for a spouse visa (plus additional for children). Always check the specific program's official guidelines.
Step-by-Step Guide to Filing Form I-864 or a Foreign Affidavit
Filing an affidavit of support involves careful preparation and submission. Below is a comprehensive workflow for the U.S. process, applicable with modifications to other countries.
- Determine your household size: Count yourself, your spouse, any dependents, and the beneficiary (and their family members). This determines the poverty guideline threshold you must meet.
- Calculate your income: Add your total current annual income from all sources (salary, self-employment, retirement, etc.). Do not include income from the beneficiary unless they will continue working in the U.S.
- Obtain tax documents: You will need your most recent federal tax return (last year) and proof of income for the current year. If your income does not meet the threshold, you can use assets (savings, investments, property equity) that are at least 3 times the shortfall.
- Find a joint sponsor (if needed): If your income and assets are insufficient, you can get a joint sponsor who meets all the requirements. The joint sponsor must sign a separate I-864 and provide their own financial evidence.
- Complete Form I-864 (or I-134 for non-immigrant visas): Download the latest version from the USCIS website. Fill it out completely, using black ink. Do not leave blanks; write "N/A" where not applicable.
- Gather supporting evidence: Attach copies of:
- Your federal tax return (most recent year).
- W-2s, 1099s, or pay stubs for the current year.
- Proof of assets (bank statements, property appraisals) if using assets.
- Proof of U.S. citizenship or lawful permanent resident status (e.g., birth certificate, green card).
- Sign the affidavit before a notary (if required): For I-864, you sign under penalty of perjury, but notarization is not required for USCIS—however, some foreign processes do require notarization. Follow the instructions on the form.
- Submit the affidavit with your immigration packet: Typically, the affidavit is filed together with the visa petition (I-130, I-129F, etc.) to the USCIS lockbox or the National Visa Center (NVC). If filing directly with a U.S. embassy abroad, follow the embassy's specific procedures.
- Respond to any RFEs: If USCIS requests additional evidence, provide the missing documents promptly to avoid delays.
Required Documentation and Income Thresholds
The table below shows the 2026 Federal Poverty Guidelines (125%) for the continental U.S., which determine the minimum income required for your household size. If you live in Alaska or Hawaii, higher amounts apply.
| Household Size | 125% Poverty Guideline (Annual Income) | Asset Requirement (if income is insufficient) |
|---|---|---|
| 2 | $25,550 | $76,650 |
| 3 | $31,100 | $93,300 |
| 4 | $36,650 | $109,950 |
| 5 | $42,200 | $126,600 |
If you are using assets, you must provide documentation that the net value (after subtracting liabilities) is at least 3 times the difference between your income and the required threshold. For example, if your household size is 4 and your income is $30,000 (shortfall of $6,650), you need assets worth at least $19,950.
Common Mistakes That Lead to Rejection of an Affidavit of Support
Many applications are delayed or denied due to easily avoidable errors. Review this list to ensure your submission is complete.
- Not meeting the income threshold: This is the most frequent reason for an RFE. Calculate your household size carefully and include all dependents.
- Submitting an outdated tax return: You must provide the most recent tax year's return (e.g., if applying in 2026, the 2025 return is typically required). Provide W-2s and pay stubs for the current year to show ongoing income.
- Failure to include proof of domicile: If you live abroad, you must show evidence that you have a U.S. address or intend to re-establish U.S. residence before the immigrant enters.
- Using assets without proper documentation: Assets must be liquid and readily convertible to cash. Bank statements, stock portfolios, and property appraisals are acceptable; retirement accounts may be counted if you can withdraw penalty-free. Provide clear valuations and subtract liabilities.
- Missing signatures or incomplete forms: Every page must be signed where indicated. Use black ink and the current form edition. Outdated forms are rejected.
- Not including a joint sponsor when needed: If your income falls short, you must provide a joint sponsor; do not assume the officer will overlook the deficit.
- Inconsistent information: The numbers on your tax returns, pay stubs, and bank statements must match. Discrepancies trigger audits.
- Forgetting translations: If any document is not in English, include a certified translation with a translator's certification.
- Submitting the wrong form: For family-based green cards, use I-864. For fiancé visas (K-1) or some non-immigrant visas, use I-134. Using the wrong form will cause a rejection.
Related Guides for Immigration Financial Documentation
- How to Get a Notarized Financial Statement for Immigration
- Proof of Funds for a Real Estate Purchase Visa: What's Required
- What Is a Solvency Certificate and Who Needs One?
Frequently Asked Questions
Q: What is the difference between Form I-864 and Form I-134?
A: Form I-864 is the legally enforceable affidavit of support for most immigrant visa cases (green card). Form I-134 is a non-binding declaration of support used for temporary visas (e.g., B-2 visitor, K-1 fiancé) and has lower income requirements.
Q: Can a friend or employer sponsor me instead of a family member?
A: In U.S. family-based immigration, only the petitioner (family member) can be the primary sponsor. However, you can have a joint sponsor—a friend or relative—who meets all the financial requirements and signs a separate I-864. Employers cannot sponsor for family-based visas, only for employment-based petitions.
Q: How long is the affidavit of support valid?
A: The affidavit remains valid indefinitely for the specific immigrant petition, but the financial evidence (tax returns, pay stubs) must be current as of the filing date. If the case is delayed, the officer may request updated income evidence.
Q: Can I use retirement savings or a 401(k) as an asset for the affidavit?
A: Yes, if you can access the funds without penalty. Provide a statement from the financial institution showing the current balance and the amount you would receive after withdrawal. The net value is counted toward the asset requirement.
Q: What if I don't have enough income but I have significant investments and property?
A: You can use assets to supplement your income, but they must be at least 3 times the shortfall. You must provide credible proof of the net value (e.g., bank statements, stock portfolio reports, real estate appraisals) and show that they are liquid or can be readily converted to cash.