Form SS-8 is the IRS form a worker or a business files to request an official ruling on whether the worker is an employee or an independent contractor for federal tax purposes. Either side can file without the other’s agreement, and the IRS will contact the other party for its version of the facts before deciding. The determination controls who owes federal income tax withholding, Social Security, and Medicare, so the answer matters for both sides of the relationship.
Who Can File and Why It Matters
The form’s full title is Determination of Worker Status for Purposes of Federal Employment Taxes and Income Tax Withholding. A worker who thinks they’ve been treated as a contractor but should be an employee can file. A firm that wants certainty about how to treat a worker, or an entire class of workers doing the same job, can also file. When a firm requests a ruling for a class, it submits one form plus a list of every affected worker’s name, address, and Social Security number.
Filing is one-sided by design. When a worker files, the IRS sends a blank Form SS-8 to the firm to gather its account. When a firm files, the IRS may contact the individual workers. Ignoring an IRS request for input doesn’t halt the process; the agency issues its ruling on whatever facts it has.
How the IRS Decides Worker Status
The form is built around the same common-law framework the IRS uses everywhere else, laid out in Publication 15-A. Three categories of evidence drive the answer.
Behavioral Control
Does the business have the right to direct how the work gets done? The IRS weighs the type and degree of instructions given, including when and where to work, what tools to use, what order to follow, and whether specific tasks must be done by a specific person. Training on the company’s methods points toward employment. What matters is the right to control the details, not whether the business actually exercises that right day to day.
Financial Control
This category looks at the business side of the arrangement. Unreimbursed expenses, a real investment in equipment or facilities, the ability to take a profit or a loss, and freedom to market services to other clients all point toward independent contractor status. A worker who receives a flat salary and uses tools the firm provides looks more like an employee.
Type of Relationship
Written contracts count, but the IRS gives more weight to what actually happens than to what paperwork says. Employee benefits such as health insurance, paid leave, or a retirement plan are strong signals of employment. So is a long, open-ended arrangement where the work is a core part of what the business does.
A separate rule applies to statutory employees: certain delivery drivers, full-time life insurance agents, home workers, and full-time traveling salespersons are treated as employees by statute regardless of the common-law analysis, provided the additional conditions in Publication 15-A are met.
Completing the Four Parts of Form SS-8
You can download Form SS-8 at IRS.gov/Forms or order a copy by calling 800-829-3676. There is no electronic filing option. The form is divided into four parts that track the framework above.
Part I collects general information: business name, worker name, and the reason for the request. This identifies everyone the IRS will need to contact.
Part II covers behavioral control. Describe who sets the schedule, what instructions the worker receives, and what training the business provides. Internal communications, instruction manuals, and daily work logs support your answers. Concrete descriptions speed the review.
Part III covers financial control. Indicate how the worker is paid (salary, hourly, commission), whether the worker has unreimbursed expenses or a significant equipment investment, and whether the worker offers services to the general public or works only for the one firm.
Part IV covers the relationship. Describe contract terms, whether the arrangement is ongoing or project-based, and whether the worker receives any benefits. Keep copies of signed agreements and termination policies handy. The IRS cares about how the relationship actually runs, not just how the paperwork characterizes it.
Where To Send the Form
Submit Form SS-8 by mail or fax. Do not attach it to your tax return; that slows down both the determination and your return.
- By mail: Internal Revenue Service, Form SS-8 Determinations, P.O. Box 630, Stop 631, Holtsville, NY 11742-0630.
- By fax: 855-242-4481.
Sign the form and include any supporting documents you referenced in your answers.
What Happens After You File
Expect at least six months, and often longer. During the review an IRS technician may reach out to either party for clarification or additional documentation, especially when the two accounts of the relationship conflict.
Determination Letter or Information Letter
If the record supports a definitive answer, the IRS issues a determination letter. That ruling is binding on the IRS based on the facts presented, though it can be modified or revoked later if circumstances change. If the facts are too thin, the IRS issues an information letter instead. Information letters are advisory only and carry no binding effect.
The IRS will not issue a determination letter for three-party arrangements, such as workers paid through a staffing agency or a professional employer organization. In those cases the worker receives an information letter at most.
Withdrawing Your Request
You can withdraw the request at any time before the ruling is issued, but only the party who filed can withdraw it. If the other side has already been contacted, the IRS notifies them when it closes the case.
If You Disagree With the Ruling
The SS-8 process is not an audit, so the appeal rights that come with an examination don’t apply. Your options are limited to asking the IRS to reconsider by pointing to facts from the original submission you believe weren’t fully weighed, or by submitting new information about the relationship. There’s no formal appeals track beyond that.
Filing Your Taxes While You Wait
Tax filing deadlines don’t pause while the IRS reviews your SS-8. If you’re a worker who believes you’ve been misclassified and your Form SS-8 is pending, use Form 8919, Uncollected Social Security and Medicare Tax on Wages, to report and pay only the employee share of Social Security and Medicare rather than the full self-employment tax. Enter Reason Code G, which means you filed Form SS-8 and haven’t received a reply. You must have filed the SS-8 on or before the date you file your return.
One caution. Reason Code G is not a promise that the ruling will go your way. If the IRS ultimately decides you were correctly treated as a contractor, you can owe additional tax, penalties, and interest on the difference between what you paid and what you owed as a self-employed person.
What a Ruling Actually Changes
A determination that a worker is an employee shifts federal tax obligations immediately. The firm becomes responsible for withholding federal income tax and paying its share of Social Security tax (6.2% on wages up to $184,500 in 2026) and Medicare tax (1.45% on all wages). Where the reclassification reaches back into prior periods, the firm may owe back taxes for those periods, and interest runs from each original due date. Section 3509 of the Internal Revenue Code allows reduced liability rates when the misclassification wasn’t intentional and the firm filed 1099s.
A worker who receives a favorable ruling can amend prior returns to recover overpaid self-employment tax, paying only the employee half of Social Security and Medicare instead of both halves.
The determination is binding for federal tax purposes only. It doesn’t automatically control state-level programs like unemployment insurance or workers’ compensation, which apply their own classification tests. A federal ruling often carries persuasive weight in state disputes, but it isn’t controlling.
Firms concerned about past periods have two separate avenues outside the SS-8 process: the Section 530 safe harbor, which can shield past employment tax liability if the firm meets reporting consistency, substantive consistency, and reasonable basis tests, and the Voluntary Classification Settlement Program filed on Form 8952, which lets a firm reclassify workers going forward at a fraction of the tax that would otherwise be owed. Neither is part of the SS-8 filing itself, and neither is available once the IRS has opened an employment tax examination.