If your income falls below the required threshold for U.S. immigration, a co-sponsor—often called a joint sponsor—can be the key to keeping your family-based visa or green card application on track. Under U.S. immigration law, most family-based applicants must submit an Affidavit of Support (Form I-864) to prove they will not become a public charge. The primary sponsor (the petitioner) must show income at or above 125% of the Federal Poverty Guidelines for their household size. When the petitioner’s income does not meet this requirement, a co-sponsor can step in to fill the gap. However, this is not a casual favor—it is a legally binding contract with the U.S. government. The co-sponsor assumes the same financial responsibility as the primary sponsor, and the obligation lasts until the immigrant becomes a U.S. citizen, accumulates 40 work quarters, or permanently leaves the country. This guide walks you through every step of finding, qualifying, and filing with a co-sponsor so you can avoid a Request for Evidence (RFE) and keep your application moving forward.
Key rule for co-sponsors: A joint sponsor does not combine income with the primary sponsor. The co-sponsor must independently meet the 125% poverty guideline for their own household size plus the intending immigrant(s). The co-sponsor also does not need to be related to the immigrant, but they must be a U.S. citizen, lawful permanent resident, at least 18 years old, and domiciled in the United States.
Who Is Eligible to Be a Co-Sponsor?
Not everyone can serve as a co-sponsor for an Affidavit of Support. USCIS has strict eligibility requirements, and failing to meet any one of them will disqualify the individual. Before you ask someone to co-sponsor, review these non-negotiable criteria.
- U.S. citizenship or lawful permanent resident status: The co-sponsor must be a U.S. citizen, U.S. national, or lawful permanent resident (green card holder). A person on a visa or without legal status cannot serve as a co-sponsor.
- Age of at least 18 years old: The co-sponsor must have reached the age of majority. Minors cannot enter into a legally binding contract with the U.S. government.
- U.S. domicile: The co-sponsor must be domiciled in the United States (or actively planning to re-establish domicile). This means their principal residence is in the U.S., and they intend to maintain it.
- Independent income qualification: The co-sponsor must meet the 125% poverty guideline on their own—they cannot combine their income with the primary sponsor or anyone else. Their income must be sufficient to support their own household size plus the number of immigrants being sponsored.
- Willingness to accept legal responsibility: The co-sponsor must sign a separate Form I-864, accepting the same legally binding obligation as the primary petitioner. This is not a symbolic gesture—it is a contract enforceable by the immigrant and the U.S. government.
It is important to note that a co-sponsor does not have to be related to the immigrant or the petitioner. A friend, colleague, or other willing individual who meets the criteria can serve as a co-sponsor. However, they must be willing to share their financial information and accept the long-term obligation.
Income Requirements: What the Co-Sponsor Must Earn in 2026
The income threshold for a co-sponsor is based on the 125% of the Federal Poverty Guidelines, which are updated annually by the U.S. Department of Health and Human Services (HHS). For 2026 filings, the guidelines became effective on March 1, 2026. The required income depends on the co-sponsor's household size, which includes:
- The co-sponsor
- The co-sponsor's spouse and any dependents
- Any other individuals claimed as dependents on the co-sponsor's most recent tax return
- The intending immigrant(s) being sponsored
For example, if a co-sponsor is single with no dependents and is sponsoring one immigrant, the household size is 2. For 2026, a household of two requires an annual income of $24,650 at 100% of the poverty guideline. At 125%, the required income would be approximately $30,813. If the co-sponsor has a spouse and two children at home, their household size would be five, requiring an annual income of at least $48,350 to qualify.
Co-sponsors should use the most recent Form I-864P (Poverty Guidelines) available on the USCIS website to determine the exact threshold for their household size. The guidelines are also available directly from USCIS.
It is critical to understand that the co-sponsor's income must be current and sustainable. USCIS will review the co-sponsor's most recent federal tax return, pay stubs, and employment verification letter to confirm the income is ongoing. Self-employed co-sponsors must provide additional documentation, such as business tax returns and profit-and-loss statements.
Step-by-Step Process to Secure a Co-Sponsor
Once you have identified a willing and eligible co-sponsor, follow these steps to ensure the affidavit of support is properly prepared and filed.
- Confirm eligibility. Verify that the potential co-sponsor meets all four criteria: U.S. citizen or permanent resident, at least 18 years old, U.S. domiciled, and financially qualified. Use the I-864P poverty guidelines to calculate their required income based on their household size plus the intending immigrant(s).
- Gather required documents. The co-sponsor must provide:
- A signed Form I-864 (separate from the petitioner's form)
- Federal tax return for the most recent tax year (and, in some cases, the past three years)
- IRS tax transcript (often preferred over the tax return itself)
- Pay stubs from the last six months
- Employment verification letter on company letterhead, stating position, salary, and permanency of the job
- Proof of U.S. citizenship or lawful permanent residency (e.g., copy of passport, green card, or naturalization certificate)
- Proof of U.S. domicile dated within 90 days of filing (e.g., utility bills, lease agreement, mortgage statement, or notarized homeowner letter with supporting documents)
- Complete the co-sponsor's Form I-864. The co-sponsor must fill out their own Form I-864, providing their personal information, household size, income details, and a signed declaration. The form must be completed in its entirety—omissions or errors can trigger an RFE.
- Submit both affidavits together. The petitioner's Form I-864 and the co-sponsor's Form I-864 must be filed together as part of the same application package. USCIS will evaluate both to ensure the financial support requirement is met.
- Respond promptly to any RFE. If USCIS requests additional evidence, provide the requested documents as quickly as possible. Common RFEs for co-sponsors include missing tax transcripts, insufficient proof of domicile, or unclear income documentation.
The entire process—from identifying a co-sponsor to receiving approval—can take several months. Starting early and ensuring all documents are complete and accurate will minimize delays.
Document Checklist and Specifications for the Co-Sponsor
To avoid rejection or a Request for Evidence, the co-sponsor's documents must meet specific technical requirements. Use this checklist to verify every item before submission.
| Document | Specification | Common Mistakes |
|---|---|---|
| Form I-864 | Signed original; all fields completed; household size correctly calculated | Missing signature, incorrect household size, outdated form version |
| Federal tax return | Most recent year (and preferably past three years) with all schedules | Submitting only the first page, missing schedules, using a tax return instead of a transcript |
| IRS tax transcript | Official transcript from the IRS (preferred over the return itself) | Providing a tax return instead of a transcript, expired or incomplete transcript |
| Pay stubs | Last six months; must show year-to-date income and employer information | Stale pay stubs (older than six months), missing employer details |
| Employment verification letter | On company letterhead; includes position, salary, and statement of permanent employment | Letter on plain paper, missing salary details, no mention of permanency |
| Proof of U.S. citizenship/LPR status | Copy of passport, green card (front and back), or naturalization certificate | Expired green card, missing copy of the back of the green card |
| Proof of U.S. domicile | Dated within 90 days of filing; utility bills, lease, mortgage statement, or notarized letter | Outdated documents (older than 90 days), no proof of physical residence |
All documents should be clear, legible copies. Originals are not required unless specifically requested by USCIS. If any document is in a foreign language, a certified English translation must be included.
Common Mistakes That Lead to RFE or Rejection
Even when a co-sponsor is willing and eligible, errors in the filing can trigger a Request for Evidence (RFE) or, in the worst case, a denial. Avoid these frequent pitfalls.
- Using outdated poverty guidelines. The 2026 guidelines became effective March 1, 2026. Filing with 2025 figures will result in an incorrect income calculation and an RFE.
- Incorrect household size. The co-sponsor must include themselves, their spouse, all dependents, and all intending immigrants. Forgetting to add the immigrant(s) to the household size is a common error that leads to understating the required income.
- Submitting tax returns instead of tax transcripts. USCIS often prefers IRS tax transcripts because they are official records directly from the IRS. A tax return alone may not be sufficient, especially if it is self-prepared.
- Failing to provide proof of U.S. domicile. The co-sponsor must prove they are physically residing in the U.S. or actively planning to return. Documents must be dated within 90 days of filing. An old utility bill or a letter from years ago will not suffice.
- Not including all required signatures. Both the petitioner and the co-sponsor must sign their respective Form I-864. Missing signatures are one of the most common reasons for rejection.
- Assuming the co-sponsor can combine income with the petitioner. This is a critical misunderstanding. The co-sponsor must qualify on their own income alone. They cannot pool income with the primary sponsor or anyone else.
- Using a co-sponsor who does not meet the eligibility criteria. If the co-sponsor is not a U.S. citizen or permanent resident, is under 18, or is not domiciled in the U.S., USCIS will reject the affidavit of support.
To minimize the risk of an RFE, have an immigration attorney or accredited representative review the entire application package before submission. A second set of eyes can catch errors that might otherwise delay your case by months.
Frequently Asked Questions
Q: Can a friend be a co-sponsor for immigration?
A: Yes. A co-sponsor does not need to be a family member. Any U.S. citizen or lawful permanent resident who is at least 18 years old, domiciled in the U.S., and meets the income requirements can serve as a joint sponsor.
Q: Can the co-sponsor combine their income with the petitioner's income?
A: No. The co-sponsor must independently meet the 125% poverty guideline for their own household size plus the intending immigrant(s). The primary sponsor's income and the co-sponsor's income are evaluated separately.
Q: What is the income requirement for a co-sponsor in 2026?
A: The co-sponsor must earn at least 125% of the Federal Poverty Guidelines for their household size, which includes themselves, their dependents, and the intending immigrant(s). The 2026 guidelines became effective March 1, 2026. For a household of two, the 125% threshold is approximately $30,813.
Q: Can a retired person be a co-sponsor?
A: Yes, a retired person can serve as a co-sponsor if they can show sufficient current income from pensions, investments, or other sources. Retirement status alone does not disqualify someone; the key is whether their income meets the poverty guideline.
Q: Does the co-sponsor have to live in the same household as the petitioner?
A: No. A co-sponsor does not need to live with the petitioner or the intending immigrant. They only need to be domiciled in the United States.
Q: How long is the co-sponsor's obligation?
A: The obligation under Form I-864 lasts until the immigrant becomes a U.S. citizen, accumulates 40 qualifying quarters of work (roughly 10 years), permanently leaves the U.S., or passes away. The co-sponsor is legally bound for the entire duration.