Do Sole Proprietors Need an EIN?

You’ve decided to start a business as a sole proprietor — the simplest business structure in the United States. Now you’re wondering whether you need an EIN (Employer Identification Number), also called a Federal Tax ID.

The short answer: probably yes, even if you don’t have employees.

This matters because getting an EIN affects how you file taxes, open business bank accounts, and work with clients. Some sole proprietors can skip it, but most find they need one eventually. Better to understand your options now than scramble to get one when a client demands it for a 1099 form.

By the end of this guide, you’ll know exactly when sole proprietors need an EIN, how to get one for free, and how your choice of business structure affects this decision.

What You Need to Understand

An EIN is a nine-digit number the IRS assigns to identify your business for tax purposes. Think of it as a Social Security number for your business.

As a sole proprietor, you’re not technically required to have an EIN unless you meet specific criteria. The IRS lets sole proprietors use their Social Security number (SSN) instead.

But here’s the reality: most sole proprietors end up needing an EIN anyway.

When Sole Proprietors Must Have an EIN

You’re legally required to get an EIN if you:

Have employees (even one part-time worker)
Set up a retirement plan like a SEP-IRA or Solo 401(k)
File certain tax forms (like Form 941 for payroll taxes)
Are required to file employment, excise, or alcohol/tobacco tax returns

When You Should Get an EIN (Even If Not Required)

Most banks won’t let you open a business account without an EIN. They’ll ask for either an EIN or your SSN, but many prefer the EIN for business accounts.

Clients often request an EIN for tax reporting. If they pay you $600 or more in a year, they need to send you a 1099-NEC form. While they can use your SSN, many businesses prefer working with vendors who have EINs.

Getting an EIN also protects your privacy. Instead of giving your SSN to every client and vendor, you give them your EIN.

How This Connects to Business Formation

As a sole proprietorship, you don’t file formation documents with your state. You’re automatically a sole proprietor when you start doing business.

But if you decide to form an LLC or corporation later, you’ll definitely need an EIN. The formation process and EIN application often happen around the same time.

how to get an EIN — Step by Step

Getting an EIN is free and takes about 15 minutes if you apply online. The IRS charges nothing for this service.

Step 1: Gather Your Information

You’ll need:

Your SSN (as the business owner)
Your business name (can be your legal name)
Your business address
The reason you’re applying (select “Started new business”)
Your business structure (sole proprietorship)

Step 2: Apply Online Through the IRS

Go to IRS.gov and search for “Apply for EIN Online.” The official application is at www.irs.gov/businesses/small-businesses-self-employed/apply-for-an-employer-identification-number-ein-online.

The system is available Monday through Friday, 7 AM to 10 PM Eastern time.

Step 3: Complete the Application

The online form asks straightforward questions:

Legal name of your business
Trade name (if different from legal name)
Business address
Responsible party information (that’s you)
Reason for applying

For “type of entity,” select “Sole proprietorship.”

Step 4: Get Your EIN Immediately

Once you submit the application, you’ll receive your EIN instantly. Print or save the confirmation page — this is your official EIN assignment notice.

Step 5: Wait for Your Official Letter

The IRS will mail you an official EIN confirmation letter within a few weeks. Keep this document with your important business records.

Timeline and Decision Points

Online application: 15 minutes, instant EIN
Mail application: 4-5 weeks processing time
Fax application: 4-5 business days
Phone application: International applicants only

Apply online unless you can’t access the internet. It’s faster and you get immediate confirmation.

What to Avoid

Never pay someone to get your EIN. Scam websites charge $50-200 for something the IRS does for free. They often rank high in search results and look official, but they’re just middlemen.

The real IRS website ends in .gov, not .com or .org.

How Your Entity Type Affects This

Your business structure determines whether you need an EIN and how you use it.

Sole Proprietorship

EIN optional in most cases
Can use SSN for taxes
Should get EIN for banking and client work
Files Schedule C with personal tax return

Single-Member LLC

Must have EIN if you want to be taxed separately from your personal return
Can elect corporate taxation (requires EIN)
Most banks require EIN for LLC business accounts
Provides liability protection that sole proprietorships lack

multi-member LLC

Must have EIN
Files separate tax return (Form 1065)
Each member receives K-1 for personal tax filing

S-Corporation and C-Corporation

Must have EIN
File separate corporate tax returns
More complex tax requirements
Payroll obligations if you take salary

Common Mistakes for Each Entity Type

Sole Proprietors often wait too long to get an EIN, then struggle to open business accounts or work with corporate clients.

LLC owners sometimes think they can use their SSN like sole proprietors. While single-member LLCs can sometimes do this, it’s almost always better to get an EIN.

Corporation owners occasionally try to operate without an EIN. This doesn’t work — corporations must have an EIN from day one.

Tools, Costs & Tips

Free Tools

The IRS online EIN application is the only tool you need. It’s free, fast, and official.

Paid Services to Avoid

Ignore any service charging for EIN applications. They add no value and often delay the process.

What to Budget

EIN cost: $0

The only related costs might be:

Business bank account fees (varies by bank)
Accounting software if you want to track business expenses separately
Professional tax help if your situation is complex

When to DIY vs. Hire Someone

DIY the EIN application. It’s designed for non-experts and takes minutes.

Consider professional help for:

Choosing your business structure (sole proprietorship vs. LLC vs. corporation)
Tax planning and filing
Complex business situations with multiple owners or entities

Pro Tips

Get your EIN before you need it. Having the number ready makes everything else easier.

Keep your EIN confirmation letter with your important documents. You’ll reference this number for years.

Don’t share your EIN carelessly, but don’t treat it like a state secret either. It’s less sensitive than your SSN but still important business information.

Frequently Asked Questions

Can I use my SSN instead of getting an EIN as a sole proprietor?

Yes, the IRS allows this for tax filing. But you’ll likely need an EIN for business banking and client relationships anyway. It’s easier to get one from the start.

How long does it take to get an EIN?

Online applications give you an EIN immediately. Mail applications take 4-5 weeks. Always apply online if possible.

Do I need a business license before getting an EIN?

No. You can get an EIN as soon as you start your business, even before getting any required licenses or permits.

Can I get an EIN if I haven’t made any money yet?

Yes. You just need to intend to start a business. You don’t need revenue or even customers yet.

What if I change my business structure later?

If you form an LLC or corporation, you’ll need a new EIN for the new entity. Your sole proprietorship EIN stays with you personally.

Is there a deadline for getting an EIN?

No specific deadline, but you must have one before filing any tax returns that require it or starting payroll for employees.

Next Steps for Your Business

Getting an EIN as a sole proprietor is straightforward — apply online through the IRS, get your number instantly, and you’re done.

But consider whether sole proprietorship is the right long-term structure for your business. While it’s simple to start, an LLC provides liability protection and tax flexibility for just a bit more complexity.

If you’re ready to explore forming an LLC or corporation instead of operating as a sole proprietor, we can help you compare your options and handle the entire formation process. At BusinessFormations.com, we walk you through entity selection, handle your state filing, help you get your EIN, and provide ongoing compliance support to keep your business in good standing.

[Get started with your business formation here](https://www.businessformations.com/get-started/) to see how the process works and what structure makes sense for your specific situation.