EIN vs SSN for Freelancers: When to Get an EIN

Updated May 6, 2026 2026 · 8 min read

Every time a freelancer fills out a Form W-9, they have to choose: write their Social Security Number in the TIN box, or write an Employer Identification Number instead. Most freelancers default to SSN because that is what they have. But handing your SSN to every new client is a small, repeatable identity-theft risk — and avoiding it is a 5-minute, free fix.

Here is the honest answer to "do I need an EIN?": no, but you almost certainly want one.

What an EIN actually is

An EIN — Employer Identification Number — is a nine-digit federal tax ID issued by the IRS. It looks like 12-3456789 (versus an SSN's 123-45-6789). Despite the name, you do not need to have employees to get one. Sole proprietors, single-member LLCs, partnerships, corporations, trusts, estates, and even some nonprofits all use EINs.

Functionally, an EIN does for your business what an SSN does for you personally: it identifies you to the IRS, to banks, to clients issuing 1099s, and to state tax agencies. The IRS treats EIN-tagged income identically to SSN-tagged income for sole proprietors — no different tax rate, no different deductions, no different rules. The EIN is just a substitute identifier.

The privacy case: why every freelancer should consider one

When a client asks you for a W-9, that form has your TIN on it. The W-9 then sits in their accounts payable system, possibly forever, possibly accessible to dozens of employees, possibly stored in a third-party tool, possibly emailed in plain text to a bookkeeper. If they get breached, your SSN is in that breach.

Every active freelancer typically has 5 to 30 W-9s out in the world. With an SSN, every one of those is a copy of your most sensitive number sitting on someone else's server. With an EIN, none of them are.

The damage from a stolen SSN is severe and persistent: tax-return identity theft, credit fraud, medical identity theft, account takeovers. The damage from a stolen EIN is real but bounded — at worst, someone files a fraudulent tax return under your business name, which the IRS resolves but is annoying. You can also be assigned a new EIN if needed; an SSN is much harder to change.

If privacy were the only argument, getting an EIN would still be worth the 5 minutes.

When an EIN is REQUIRED (not optional)

The IRS lists a handful of situations where you must have an EIN:

• You hire employees (W-2 employees, not contractors). You need an EIN to file payroll tax returns.
• You operate as a corporation or partnership. Both structures are required to have their own EIN.
• You have a multi-member LLC. Multi-member LLCs are taxed as partnerships by default, so the same rule applies.
• You elected S-corporation status by filing Form 2553. The S-corp itself needs an EIN, separate from your personal SSN.
• You file excise tax returns (alcohol, tobacco, firearms, fuel — uncommon for freelancers).
• You have a Keogh or solo 401(k) plan.
• You file employment, excise, or alcohol/tobacco/firearms tax returns.
• You hire independent contractors and need to issue them 1099s — strictly speaking you can issue 1099s using your SSN as a sole prop, but most accounting software requires an EIN to file electronically.

When an EIN is OPTIONAL but smart

If none of the above applies, the IRS does not require you to have one. But here are the situations where most freelancers benefit anyway:

How to get an EIN — the actual steps

Applying for an EIN is one of the few things at the IRS that is genuinely easy. It is free, takes about 5 minutes, and the EIN is issued instantly upon completion. No mail, no fax, no waiting.

Before you start

Have these ready:

• Your legal name and SSN (or ITIN)
• Your business name (if different from your personal name) and any DBA
• Your business mailing address
• The reason you are applying (usually "started a new business" or "banking purposes")
• Your business start date
• An estimate of how many employees you expect in the next 12 months (zero is fine)

The 5-step application

1. Go to irs.gov/EIN and click "Apply Online Now." The application is only available Monday-Friday, roughly 7am to 10pm ET.
2. Select your entity type. For most solo freelancers without an LLC, this is "Sole Proprietor." For a single-member LLC, choose "Limited Liability Company" and enter "1" for number of members.
3. Enter the reason for applying. "Started a new business" works for most. "Banking purposes" is also accepted if you already operate but want an EIN to open a business account.
4. Enter the responsible-party information (your name, SSN, address) and the business address.
5. Confirm and submit. The IRS issues the EIN on the spot. Save the confirmation letter (Form CP 575) as a PDF immediately — the IRS will not let you re-download it later, and many banks ask to see it when you open an account.

If you cannot use the online tool (you live abroad, you have no SSN, the system is down), you can fax Form SS-4 to the IRS and receive your EIN by fax in about 4 business days, or by mail in 4-6 weeks. Online is dramatically better.

Sole prop, LLC, S-corp — how the EIN fits each

Sole proprietor (no LLC)

You can use either SSN or EIN. The income is reported on Schedule C either way. With an EIN, you put it on Line 1 of your W-9 (your personal name), check "Individual/sole proprietor" on Line 3a, and enter the EIN in the TIN box. Same tax outcome, much better privacy. See how to fill out a W-9 for the line-by-line.

Single-member LLC (default tax treatment)

The IRS treats single-member LLCs as "disregarded entities." For tax purposes, the LLC and you are the same. You can apply for an EIN for the LLC even though it is "disregarded." Many freelancers do, both for banking and to keep the LLC's identity clean from their personal SSN.

Important quirk: when filling out a W-9 as a single-member LLC owner, the IRS instructions say to put your personal name on Line 1 and the LLC name on Line 2. The TIN box should typically have your SSN — but if you have an EIN tied to the LLC and the client agrees, you can use that instead. The W-9 instructions specifically allow this. See our LLC vs sole proprietor guide for the trade-offs of forming an LLC in the first place.

S-corporation election

If you have elected S-corporation status (filed Form 2553), the S-corp is its own legal entity for tax purposes. It must have its own EIN. Your W-9 (signed in the corporation's name) uses the EIN, and you check "S Corporation" on Line 3a. Your personal SSN never appears on the W-9 at all. See S-corp election for the self-employed for whether the structure makes sense for your income level.

What changes after you have an EIN

Practical day-to-day shifts:

• Your W-9 changes. From here on, write the EIN in the TIN box instead of your SSN. Update old W-9s only if a client asks for a fresh one — there is no obligation to retroactively swap.
• You can open a business bank account. Most U.S. banks (Chase, Bluevine, Mercury, Relay, Novo, etc.) require an EIN even for a sole prop business account. Personal account in your name is no longer mixed with business deposits.
• You can apply for a business credit card with the EIN as the primary identifier. Personal credit may still be checked, but the account history accrues to the business.
• You can issue 1099-NECs to your own contractors without exposing your SSN to them.
• If you ever upgrade to an LLC or S-corp, the existing EIN may transfer or you may need a new one (the IRS rules depend on the structure change). Either way, having one already makes the next step smoother.

What does NOT change after you have an EIN

• Your tax forms. Sole props still file Schedule C with the 1040. SE tax still applies at 15.3%.
• Your tax rate. No change in brackets or deductions.
• Your quarterly estimated payments. You still owe them if you expect to owe over $1,000. Use the Quarterly1099 calculator to estimate.
• The need to keep records. An EIN does not create accounting hygiene — you still do.

Common mistakes

• Applying for multiple EINs. You only need one per entity. Sole props get one EIN that covers all their freelance activity, regardless of how many DBAs or industries.
• Losing the CP 575 letter. The IRS does not reissue it. The replacement (Letter 147C) requires calling the Business and Specialty line, often a 60-90 minute hold. Save the original PDF.
• Using a service that charges $99-$300 for an EIN. The IRS charges $0. Period. Any third-party "EIN service" is selling you a free 5-minute form.
• Using the EIN on personal tax documents. Your 1040 still uses your SSN. The EIN is only for business filings and W-9s.
• Forgetting to update your accounting software. If QuickBooks or your bookkeeper still has your SSN, your generated 1099s and tax exports may go out with the wrong number.

FAQs

Does getting an EIN cost money? No. The IRS issues EINs for free at irs.gov/EIN. Any site charging for one is a paid intermediary, not the IRS.

Can I get an EIN as a sole proprietor without an LLC? Yes. Sole proprietors without any formal entity can still apply. Pick "Sole Proprietor" on the application.

Will an EIN affect my tax bill? No. For sole props and single-member LLCs, the tax treatment is identical with or without an EIN.

How long does an EIN last? Forever, unless you close the business and notify the IRS. Even then, the EIN is never reissued to anyone else.

Do I need a separate EIN if I freelance in two industries? No. One EIN covers all activities of a single sole proprietor. Only separate legal entities (a second LLC, a corporation) need their own EINs.