Form SS-8 is the form a business or a worker sends the IRS to get an official ruling on whether the worker is an employee or an independent contractor for federal employment tax and income tax withholding. There's no fee, and the IRS says the determination letter is binding on it as long as the facts and the law it was based on don't change.
The test the IRS applies is the common law one: generally, a worker is an employee if the firm has the right to control and direct what will be done and how it will be done. Form SS-8 is how you get that test applied to your own situation in writing, instead of guessing.
Who files Form SS-8, and what each side should expect
| If | What happens |
|---|---|
| A worker files | The IRS usually asks the firm to complete its own Form SS-8, because the decision affects both sides. If the firm doesn't respond, the IRS can still issue an information letter based on the facts it has. |
| A firm files for one worker | Complete the form with that worker's details. |
| A firm files for a class of workers | Complete it for one worker in that class and attach a list of the names, addresses and SSNs (if available) of every worker the decision could affect. |
| The tax year is closed | If the statute of limitations on the return has expired, the IRS won't issue a determination letter. |
When the IRS won't give a ruling
A determination can only be asked for to resolve federal tax matters. The instructions list cases where the IRS won't issue a determination letter, although it may send an information letter instead:
- Proposed transactions and hypothetical situations, so you can't use it to test a contract before you hire.
- Cases already in worker classification litigation.
- State or local government workers who may be covered by a Section 218 Agreement, which only the Social Security Administration can decide.
- Business-to-business transactions.
- Other cases not in the best interests of tax administration.
An information letter is advisory only and isn't binding on the IRS, though a worker can use it to meet their own federal tax obligations.
How to file Form SS-8, step by step
- Download the current Form SS-8 and read the instructions for your side, worker or firm. The form asks about behavioural control, financial control and the relationship between you.
- Answer every part. Attach copies of contracts, job descriptions, invoices or anything else that shows how the work is done and paid.
- If the firm didn't pay the worker directly, enter the payer's name, address and EIN under the firm's details on page one.
- Sign and date it yourself. The IRS won't accept a stamped signature or your power of attorney representative's signature, and an unsigned form is returned. A handwritten or electronic signature (such as a digitally signed PDF) is fine.
- Mail or fax it to the address in the instructions. Don't send it with your tax return, because that delays processing.
- Keep filing and paying as normal while you wait.
What happens after you file
The case is assigned to a technician who reviews the facts, applies the law and makes a decision. The technician can ask the person who filed, other parties involved or third parties for more information to clarify the working relationship. The IRS generally issues the formal determination to the firm, or to the payer if that's a different entity, and sends a copy to the worker.
What a determination does and doesn't do
- It isn't an audit. The instructions say neither the SS-8 process nor the IRS's review of your records counts as an examination of any return.
- It doesn't change your deadlines. A worker still has to file a tax return and pay tax on time while the request is open.
- It applies only to the worker, or class of workers, it was requested for.
- It doesn't consider Section 530 relief. If you had a reasonable basis for treating someone as a contractor, relief from employment taxes under section 530 of the Revenue Act of 1978 has to be pursued separately, because a Form SS-8 determination isn't an examination.
Should a small business file one?
If you're paying someone on Form 1099-NEC but you set their hours, provide their equipment and direct how they work, the honest answer is often already clear from the common law test, and filing gives the IRS the facts in your own words. If the status is borderline and the same role is filled by several people, a class ruling can settle it once. If the worker has filed, answer the IRS's request: the instructions say the IRS can rule on the facts available to it without you. And if you're writing contracts now, this guide to what an independent contractor agreement should include is a better starting point, because Form SS-8 can't be used for proposed arrangements.
The verdict
Form SS-8 is free, binding and slow, so treat it as a way to settle a real dispute, not as a planning tool. Before you file, read the questions and answer them for yourself first. If most of the answers point to control, you probably don't need the IRS to tell you, and you'd be better off fixing payroll now and correcting past returns. If you're the worker, filing protects you; just keep filing your own return on time while you wait.
Frequently asked questions
What is Form SS-8?
It's the IRS form firms and workers use to request a determination of whether a worker is an employee or an independent contractor for federal employment taxes and income tax withholding.
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Is there a fee for Form SS-8?
No. The IRS says there is no fee for requesting a Form SS-8 determination letter.
Is an SS-8 determination binding?
Yes, on the IRS, if there's no change in the facts or law the ruling was based on. An information letter, which the IRS sometimes issues instead, is advisory only.
Can I file Form SS-8 for a job I haven't started yet?
No. The IRS doesn't issue determination letters for proposed transactions or hypothetical situations.
Can I send Form SS-8 with my tax return?
No. The instructions say to mail or fax it separately, because attaching it to your return delays processing.
Does filing Form SS-8 trigger an audit?
No. The IRS says the determination process and its review of records don't constitute an examination of any return.
