Do You Need an EIN for a Small Online Shop?

When you open a shop, forms start asking for a tax ID: payment processors, wholesale suppliers, banks, and marketplaces. If you are a one-person business, you might wonder whether you need an Employer Identification Number, or EIN, or whether your Social Security number is enough. The IRS lays out when an EIN is required, and getting one is free.

1. What an EIN is

The IRS describes an EIN as a federal tax ID number for businesses, tax-exempt organizations, and other entities. You use it to file required tax returns and information returns for the business.

2. When the IRS says you need one

According to the IRS, you generally need an EIN to:

• hire employees,
• operate a partnership, LLC, or corporation,
• pay employment, excise, or alcohol, tobacco, and firearms taxes,
• change business structures or ownership, or
• administer certain trusts, retirement plans, and estates.

The IRS's EIN page adds that you need one if you withhold taxes on income other than wages paid to a non-resident alien, and that the same page lists partnerships, LLCs, and corporations as entities that need one. These details are from IRS pages last updated in July 2026. State sales tax registration is handled by your state, not by this IRS number.

3. When it is optional

A sole proprietor with no employees who is not in one of the situations above may not need an EIN for federal tax purposes. The IRS notes that even if you do not need one for federal taxes, you can still request one for banking or state tax purposes. Many small sellers choose to get one anyway so they can give suppliers and payment platforms a business number instead of their Social Security number. That is a privacy choice, not an IRS requirement.

If you later hire your first employee, the IRS's sole proprietorship guidance covers the employment tax duties that come with it, including Social Security and Medicare taxes, income tax withholding, and filing Forms W-2 and W-3.

4. How to apply

The IRS lists several ways to get an EIN if your principal place of business is in the U.S.:

Things to know about the online application, from the IRS:

• You must complete it in one session. It expires after 15 minutes of inactivity, and you have to start over.
• You need the Social Security number or individual taxpayer ID number of the responsible party who controls the business.
• You can apply for only 1 EIN per responsible party per day.
• The tool is available only during set hours, Eastern Time.

5. Form the business first

If you are creating an LLC or corporation, the IRS says to form the entity through your secretary of state before you apply for the EIN. Applying first can delay the application. Enter the business name exactly as it appears on your formation documents. The IRS allows only letters, numbers, hyphens, and ampersands in business names, so symbols need to be spelled out or replaced (for example, "Jones.Com" becomes "Jones Dot Com" or "Jones Com").

6. A simple decision checklist

Ask these questions in order:

1. Will you hire anyone as an employee this year? If yes, you need an EIN.
2. Is the business a partnership, LLC, or corporation, or are you forming one? If yes, you need an EIN, after the entity is formed with the state.
3. Do you owe excise or employment taxes? If yes, you need an EIN.
4. If none of these apply, decide whether you want one anyway for a business bank account, state registration, or to avoid sharing your Social Security number with suppliers.

7. Never pay for an EIN

The IRS is direct: beware of websites that charge for an EIN. You never have to pay a fee for one. Apply through IRS.gov itself.

8. Finding a lost EIN

If you misplace your number, the IRS lists ways to confirm it, including requesting an entity transcript, downloading a CP575 verification notice through an eligible Business Tax Account, or calling the business and specialty tax line to request Letter 147C.

9. Key takeaways

• An EIN is a free federal tax ID for businesses, issued directly by the IRS.
• You generally need one to hire employees, operate a partnership or corporation, or pay certain excise and employment taxes.
• A one-person sole proprietorship (not an LLC) without those triggers may not need one, but can still get one for banking or state purposes.
• Online applications are issued immediately if approved; fax takes about 4 business days and mail about 4 weeks.
• Form an LLC or corporation with the state first, and never pay a third-party site for an EIN.