Affidavit of Support Template & How-To Guide

An affidavit of support is a sworn statement in which one person promises to be financially responsible for another. It shows up most often in immigration cases, where a sponsor guarantees that a relative or friend will not become a public charge after arriving in the United States. Get the facts wrong or leave out the income proof, and the application it supports can stall for months.

This guide covers what an affidavit of support actually is, the two very different documents people mean when they say the phrase, how to structure one, and the mistakes that get them rejected.

What Is an Affidavit of Support?

An affidavit of support is a written, sworn statement in which a sponsor accepts financial responsibility for another person, called the beneficiary or intending immigrant. By signing it, the sponsor tells a government agency, "If this person cannot support themselves, I will."

Like any affidavit, it is signed under oath, which is what separates it from a casual letter of support. The signature carries legal weight: making a false statement in a sworn document is perjury. If you have never drafted a sworn statement before, our guide to writing an affidavit walks through the general structure that every affidavit shares.

The phrase gets used loosely, so the first job is figuring out which document you actually need.

The Two Documents People Mean

Form I-864 (the federal affidavit of support)

When a U.S. citizen or permanent resident petitions for a family member's green card, the sponsor must file Form I-864, Affidavit of Support Under Section 213A of the INA. This is a fixed government form, not something you write from scratch. It has three defining features:

• Income requirement. The sponsor must show income at or above 125 percent of the federal poverty guidelines for their household size.
• It is a contract with the government. If the immigrant later collects certain means-tested benefits, the government or the immigrant can sue the sponsor to recover the cost.
• It lasts a long time. The obligation ends only when the immigrant becomes a U.S. citizen, earns 40 qualifying quarters of work (about ten years), leaves the country permanently, or dies.

If your situation is a family-based green card, you are almost certainly filing the I-864. You download it from USCIS, fill it in, and attach tax returns and proof of income. You do not draft your own version.

The general affidavit of support

Outside of the I-864, plenty of situations call for a sworn support statement where no official form exists. A few common ones:

• Sponsoring a relative's visitor (B-2) visa so a consulate sees they have funds to rely on
• Supporting a student applying to a foreign university or program
• Backing a fiancé(e) or friend's short-term stay
• Any request from a consulate, school, or agency for proof that someone will be financially supported

Here you write the affidavit yourself. That is the version this guide focuses on, because it is the one you have to draft rather than download.

What to Include in an Affidavit of Support

A well-drafted general affidavit of support answers four questions: who is promising, who is being supported, what the promise covers, and why the sponsor can afford it. Work each of these into the document.

1. Identify the Sponsor

Give the sponsor's full legal name, address, date and place of birth, and immigration or citizenship status (citizen, permanent resident, or visa holder). If the sponsor is a citizen or resident, say so plainly, since that is often the whole point of the affidavit.

2. Identify the Beneficiary

State the beneficiary's full name, date of birth, country of citizenship, and their relationship to the sponsor. Spell out the relationship clearly: "my sister," "my son," "my fiancée." Consulates read these quickly, and vagueness invites follow-up questions.

3. State the Promise

This is the most important part. Describe exactly what the sponsor is committing to: covering housing, food, medical costs, tuition, travel, or general living expenses for a stated period. Be specific about duration. "For the entire length of her studies" or "throughout his 90-day visit" is stronger than an open-ended promise no one believes.

4. Prove the Sponsor Can Afford It

A promise is only as good as the money behind it. Reference the supporting documents attached to the affidavit:

• Recent tax returns or W-2s
• Bank statements showing available funds
• An employment or income verification letter stating salary and job title
• Proof of assets such as property or investments, if relevant

The affidavit itself should name these attachments so the reviewer knows what to look for.

5. Add the Oath and Signature Block

Close with a sentence affirming that the statements are true to the best of the sponsor's knowledge, made under penalty of perjury, followed by the signature line and a notary block. For a general affidavit, notarization is usually what turns your statement into a sworn one, so leave room for the notary's seal and commission details.

Who Can Be a Sponsor

Not everyone qualifies to sign. For the federal I-864, the primary sponsor must be a U.S. citizen or lawful permanent resident, at least 18 years old, and domiciled in the United States. They also have to be the person who filed the immigrant petition, which is why the sponsor is usually a spouse, parent, adult child, or sibling.

The income test is where many sponsors get stuck. If your own household income falls short of 125 percent of the poverty guidelines, you have two ways to close the gap:

• Add a joint sponsor. A joint sponsor is a separate person who files their own I-864 and independently meets the income requirement for their own household. They take on the same obligation as the primary sponsor, so this is not a favor to hand out lightly.
• Count a household member's income. A relative living with you can pool their income toward the requirement using Form I-864A, which binds them alongside you.

For a general affidavit of support, the rules are looser, but the logic is the same. The person signing should have a real financial connection to the beneficiary and enough documented income or assets to make the promise believable to whoever reads it.

How to Write an Affidavit of Support: Step by Step

Step 1: Confirm you need a general affidavit, not the I-864. If this is a family-based green card, stop and download Form I-864 instead. Everything below assumes a general affidavit.

Step 2: Gather the sponsor's financial records. Pull the most recent tax return, a month or two of bank statements, and an income letter from the employer. You will reference these in the affidavit and attach copies.

Step 3: Draft the opening. Name the sponsor, their status, and their capacity to make the statement. Something like: "I, [full name], a citizen of the United States residing at [address], make this affidavit in support of [beneficiary]."

Step 4: State the relationship and the beneficiary's details. Full name, date of birth, nationality, and how the two people are connected.

Step 5: Write the support promise. Specify what expenses you will cover and for how long. Tie the duration to the underlying purpose, such as a visa period or a course of study.

Step 6: List the evidence. Reference each attached document by name so the reviewer can match the paperwork to the claim.

Step 7: Add the perjury statement and signatures. Include the sworn-statement language, then sign in front of a notary. Have the notary complete the acknowledgment block.

Common Mistakes to Avoid

Even a short affidavit can sink an application when these slip through.

Using the wrong document. The most common error is drafting a homemade "affidavit of support" when the case actually requires Form I-864. A consular officer expecting the federal form will not accept a self-written substitute.

Skipping the notary. A general affidavit that is signed but not notarized is just a letter. Without the oath, it carries little evidentiary weight, and many consulates reject unnotarized statements outright.

Making a promise the income cannot back. Guaranteeing full support on an income that barely covers the sponsor's own household reads as unrealistic. Reviewers cross-check the promise against the tax returns and bank statements, so the numbers have to hold up.

Being vague about the relationship or the term. "I will help my relative for as long as needed" gives a reviewer nothing to evaluate. Name the relationship and the time period.

Forgetting the attachments. Referencing "my attached bank statement" and then failing to include it is a fast route to a request for evidence and a delay.

Not understanding the commitment. With the I-864 especially, sponsors sign without realizing they may be financially liable for years. If you are asked to be a joint sponsor, treat it with the same seriousness as signing any binding agreement and read what you are agreeing to.

What Happens After You Sign

For a general affidavit, signing is usually the end of your active role: the beneficiary submits it with their application, and the reviewing agency decides how much weight to give it. Keep a copy, since a consulate or school may ask the sponsor to confirm the details later.

The I-864 is different. Once the immigrant becomes a permanent resident, the sponsor's obligation is live. If the immigrant later receives a means-tested public benefit, the agency that paid it can ask the sponsor to reimburse the cost, and the immigrant can sue the sponsor directly to enforce the promised support. The commitment does not end when the relationship does. Even a divorce leaves the obligation in place until one of the legal endpoints is reached: the immigrant naturalizes, earns 40 qualifying work quarters, permanently leaves the country, or dies. Because the stakes run that high, read the form in full before signing, and make sure any joint sponsor understands what they are taking on.

Affidavit of Support vs. Sponsorship Letter

People often use "affidavit of support" and "sponsorship letter" interchangeably, but they are not the same. A sponsorship letter is an ordinary letter stating an intention to help. An affidavit of support is sworn under oath and notarized, which makes it stronger evidence. When an agency asks specifically for an affidavit, a plain letter will not satisfy the request. When they ask for a letter, an affidavit works but may be more formality than the situation needs.

If your matter is closer to a domestic financial obligation than an immigration filing, a different document may fit better. A structured payment or repayment arrangement can spell out who pays what and when, which an affidavit of support does not do.

When You Need an Affidavit of Support

Reach for an affidavit of support when someone in an official process needs proof that a specific person will stand behind another's finances:

• A consulate wants assurance a visitor or fiancé(e) will not run short of money
• A university or program abroad requires evidence a student is funded
• A relative's green card is being petitioned, in which case the I-864 applies
• Any agency asks for a sworn statement of financial responsibility rather than a casual letter

Affidavits of support belong to a broader family of sworn statements. If your need is proving where someone lives or settling a small estate, see our related guides on the affidavit of residency and the small estate affidavit instead.

Related guides

• Affidavit of Death Template: How to Write an Affidavit of Death
• Affidavit of Identity Template: How to Write One
• How to Write an Affidavit of Domicile
• Small Estate Affidavit Template: How to Write One
• Affidavit of Residency Template: How to Write an Affidavit of Residency

Generate Your Affidavit of Support with Contractable

Writing an affidavit of support is manageable once you know which document you need and what facts to include, but getting the sworn language and structure right for your specific situation is where people stumble. Contractable drafts a customized affidavit of support in seconds, with the right identifying details, support terms, and notary block for your purpose. No legal background required.