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Do resellers need an EIN as a sole proprietor?

Published October 14, 2026 6 min read

If you sell alone as a sole proprietor, you usually don't need an EIN. Your Social Security number does the job on tax forms. An EIN, or employer identification number, is a free tax ID the IRS issues for a business, and it is a different thing from any permit your state wants.

Does a sole proprietor reseller need an EIN?

Not unless something on the IRS's list applies, and for someone working alone, nothing does by default. Say you flip thrift finds by yourself: no payroll, no partner, no corporation. Here is the list from the IRS EIN page, last reviewed in July 2026, in reseller terms.

Two rarer items on the list are withholding tax on a payment to a non-resident alien and, in Publication 1635, filing Chapter 7 or 11 bankruptcy. Neither is part of ordinary reselling. For the thrift flipper, the row most likely to change things is the first: the day you hire help, ask a preparer whether that person counts as an employee. If no row fits you, keep using your Social Security number, and apply the day one does. Not sure what's taxable at all? Start with reseller tax basics.

Is an EIN the same as a state tax ID or a seller's permit?

No. The IRS issues the EIN. A state tax ID comes from your state, and whether you need one depends on whether your business must pay state taxes (steps vary by state). A registration such as a seller's permit or resale certificate is a separate state question too, so an EIN doesn't stand in for any of them.

Go to your state's Department of Revenue website, or start from the IRS's directory of state government websites, and look up what your state asks of a seller.

What if you sell through an LLC?

Rule of thumb: if you sell through a new one-owner LLC, plan on getting an EIN. For a firm answer on your own LLC, ask a preparer or call the IRS Business and Specialty Tax Line (the number is on the EIN page).

The reason is that two IRS pages seem to disagree. Its EIN page lists limited liability companies among the entities that need an EIN. Its page on single-member LLCs says a one-owner LLC the IRS treats as part of its owner's tax return (a “disregarded entity”), with no employees and no excise taxes, does not need one. Then it adds: “Most new single-member LLCs classified as disregarded entities will need to obtain an EIN.” Both pages were reviewed in July 2026, so neither is the stale one.

Two more LLC details. An LLC that elected to be treated as a corporation is not a sole proprietor at all. And on a Form W-9, a disregarded LLC gives its owner's SSN or EIN, not the LLC's own.

Do you need an EIN to sell on eBay or other marketplaces?

Not as an individual, but eBay's business sign-up asks for one. On eBay registration help (read October 8, 2026), an individual seller gives a full name, address, date of birth and Social Security number. A Registered Business seller, a label that covers sole proprietors and single-member LLCs, gives a legal business name, an EIN, a business address and identification for stakeholders such as the primary contact and owners. That is an eBay account rule, not an IRS rule.

Registered Business is open to a sole proprietor, but it is the sign-up that asks for an EIN. Reading eBay's page, a solo seller without one can start with the individual sign-up, which asks only for the personal details above.

An EIN doesn't skip identity checks, though. eBay may ask for identity documents for each stakeholder. For a sole proprietor it accepts an IRS 147C EIN verification letter or any IRS document showing your name, address and SSN, EIN or other taxpayer ID number.

Other marketplaces set their own sign-up rules. For why eBay asks for a number and what a B notice is, read why eBay needs your SSN. For what the figure on the form means, read the 1099-K explained.

Why would a reseller get an EIN anyway?

The everyday reason is wanting to put a business number on a payer's form instead of your Social Security number. The Form W-9 instructions let a sole proprietor with an EIN enter either one, though they add that the IRS encourages you to use your SSN, and eBay's 1099-K FAQs give the same answer. You can also request an EIN for a bank account or state tax purposes even when federal tax law doesn't require one, and an employee, a partner or incorporation would make you need one.

Know what you're getting. Applying takes the SSN or individual taxpayer ID number (ITIN) of the responsible party, the person in control of the business (IRS, Get an EIN), so an EIN changes which number you hand out, not whether the IRS knows who you are. Publication 1635 adds that an EIN is for business activities only and shouldn't stand in for your SSN.

If a business number on your forms is what you want, the application is free.

How do you get an EIN, and does it cost anything?

It costs nothing. You can get one free, directly from the IRS, in minutes, and the IRS says “You never have to pay a fee for an EIN.” The SBA agrees. Some websites charge for one anyway, and the IRS warns about them, so start at its own page, Get an employer identification number.

The online application can't be saved, so finish it in one sitting, then print the confirmation letter and keep it with your records. The IRS EIN page also lists fax and mail options if the online tool doesn't work for you.

Does an EIN change how you pay tax?

No. A sole proprietor files Form 1040 with Schedule C for income tax, Schedule SE for self-employment tax and Form 1040-ES for estimated tax (IRS table of sole proprietor forms), and none of them is tied to having an EIN. See Schedule C for resellers for how your profit lands there.

More questions about EINs for sole proprietors

Today, run your own setup down the four rows of the table. If every answer is no, the IRS list gives you no reason to apply today. State registrations are a separate check. A yes means applying on the IRS's own page, in one sitting, and printing the letter.

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