A self-employment affidavit is a sworn statement declaring your business income and expenses when no employer pay stub exists to prove what you earn. To complete one, gather the financial records that back your numbers, transfer those figures into the exact form the requesting entity gave you, sign it in front of a notary, and submit it with your supporting documents attached. The steps below walk through each part.
When the Form Gets Asked For
The affidavit shows up whenever an institution needs proof of income and you have no W-2 or paycheck to hand over. Family courts require it when calculating child support for a self-employed parent, alongside recent tax records. Benefit programs like SNAP and Medicaid use it to check income against eligibility thresholds.1Food and Nutrition Service. SNAP Eligibility The Health Insurance Marketplace may request a self-employment ledger to verify the net income you estimated on your application.2HealthCare.gov. Reporting Self-Employment Income to the Marketplace Landlords and public housing authorities use it to test income-to-rent ratios or subsidy eligibility. Insurers ask for it when calculating lost wages on a personal injury or disability claim.
Pull Your Records First
Everything you write on the affidavit should trace back to a document you can produce if challenged. You’re signing under oath, so the numbers have to be right, and the way to make them right is to gather the paperwork before you touch the form.
Tax Returns and Schedules
Your most recent federal return is the backbone. Have IRS Form 1040 and Schedule C in front of you — Schedule C reports profit or loss from a sole proprietorship and gives you gross receipts, itemized expenses, and net profit, which are the exact figures most affidavits want.3Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship) If you filed Schedule SE, keep it handy too; it confirms the net earnings figure used for Social Security and Medicare.4Internal Revenue Service. About Schedule SE (Form 1040), Self-Employment Tax
1099s
Independent contractors who earned $2,000 or more from a single client during the tax year should receive a Form 1099-NEC.5Internal Revenue Service. Publication 1099 (2026), General Instructions for Certain Information Returns If you were paid through a platform like PayPal or Venmo, a Form 1099-K may also arrive. These give you a cross-check against your income figure. You still have to report all self-employment income, not only the amounts printed on 1099s.
Profit-and-Loss Statement and Bank Records
Many affidavits ask for income over recent months rather than a prior tax year. A current profit-and-loss statement, even a plain spreadsheet, closes the gap between your last return and today. Monthly business bank statements support the P&L. If personal and business funds sit in the same account, expect closer questioning, and consider separating accounts before the next filing.
Business Identification
You’ll need your Taxpayer Identification Number (either your SSN or an EIN), the legal name of the business, and any “Doing Business As” name. Some forms request business license numbers, so pull those if you have them.
Filling In the Form
There is no universal self-employment affidavit. Courts, housing authorities, state agencies, and insurers each use their own template. Always use the version the requesting entity provides — local court clerks, state Department of Human Services websites, and municipal housing authority portals are the usual sources. Submitting a generic form when the agency requires its own is a reliable way to get bounced.
The structure is fairly consistent across templates. Work through it in this order.
Personal and Business Information
The top of the form collects your full legal name, date of birth, address, and often a case or client ID tied to the matter. The next block asks for the business name, your TIN or SSN, and the type of work you do. If a checkbox asks whether you’re the applicant, spouse, or dependent, mark the correct one. Errors in these fields cause processing delays and record mismatches.
Income and Expense Figures
This section carries the weight. Most forms ask for gross income (total receipts before expenses), itemized business expenses, and net income. Some break income down by month over a recent period — three months is common — and then instruct you to annualize the total, for example by multiplying the three-month figure by four.
Every number here must match the supporting documents you gathered. If Schedule C shows $42,000 net and the affidavit says $30,000, the gap will be noticed. Only legitimate business expenses qualify as deductions: expenses ordinary and necessary for your trade or business. Personal, family, and living expenses don’t count, even if they were paid from a business account.6Internal Revenue Service. Deducting Other Business Expenses
Projected Future Income
Housing and benefit affidavits often ask you to project earnings over the next twelve months. It’s an estimate, but it’s a sworn estimate, so base it on your actual recent trend rather than what you hope will happen. For Marketplace coverage, update the application as soon as possible during the year if your actual income runs significantly above or below your projection, because the difference affects premium tax credits you may have to repay.2HealthCare.gov. Reporting Self-Employment Income to the Marketplace
Certification and Signature
At the bottom is a certification statement saying the information is true and accurate. Read it before signing. Most affidavits require the signature to be notarized. Some jurisdictions accept an unsworn declaration signed under penalty of perjury as a substitute where notarization isn’t feasible and no law specifically requires it; the declaration typically must include your residential address. Confirm with the requesting entity before skipping the notary.
Notarizing the Signature
A notary public verifies your identity and witnesses your signature, which is what gives the affidavit its legal weight. Do not sign before you’re in front of the notary. They have to watch you sign.
Notaries work at banks, UPS stores, law offices, and many public libraries. Fees vary by state and generally run from a few dollars to $25 per notarial act. Bring a valid government-issued photo ID.
If you can’t get to a notary in person, most states now permit remote online notarization, where you meet the notary over video, verify your identity electronically, and apply a digital signature. Not every agency or court accepts remotely notarized documents, so confirm acceptance before booking one.
Submitting the Affidavit
How you deliver the notarized affidavit depends on who asked for it. Courts generally accept hand-delivery to the clerk’s office or certified mail. Government agencies often have secure online portals for uploads. Certified mail is worth the small extra cost on any paper submission because it produces a delivery receipt.
Attach copies of the supporting documents — tax returns, 1099s, bank statements, profit-and-loss statements — unless the requesting entity specifically instructs otherwise. Sending only the affidavit invites follow-up requests that stall your case. Keep the originals and a full copy of what you sent.
Processing times vary with caseload and how clean your submission is. If you haven’t heard anything in a few weeks, follow up. Some agencies send receipt confirmations and some don’t. Watch your application status so you can respond quickly to any request for clarification before a deadline runs.
Keeping the File Afterward
Don’t discard the documents that supported your affidavit. The IRS recommends keeping records that support items on your tax return for at least three years from the filing date, and employment tax records for at least four years.7Internal Revenue Service. How Long Should I Keep Records Because your affidavit draws on the same underlying records as your return, the same retention periods apply. The agency that received the affidavit may also revisit your income figures during the life of the program or proceeding, and organized records let you respond without reconstructing numbers from memory.
If the Numbers Are Wrong
Because you sign under oath, knowingly providing false figures is perjury. Federal perjury carries a fine and up to five years in prison.8Office of the Law Revision Counsel. 18 USC 1621 – Perjury Generally State perjury statutes carry their own penalties, and the reviewing agency can separately pursue fraud charges or claw back benefits paid based on incorrect figures.
Honest mistakes cause problems too. When affidavit figures don’t line up with tax returns or bank statements, the reviewing agency usually flags the file and asks for more documentation. In a court proceeding, opposing counsel can use the discrepancy to attack your credibility on the rest of the case. The way to avoid both outcomes is simple: fill in the form with your supporting documents open in front of you, and check every figure before you sign.