EIN for your side business

Side hustle, same tax ID questions

Starting a weekend project or freelance gig often brings up the Employer Identification Number (EIN) before you have steady revenue. The IRS uses this number to track business tax accounts, payroll deposits, and certain information returns.

Some side businesses need an EIN before they open a bank account or run payroll. Others can file for years with a Social Security number on Schedule C. The rules depend on whether you hire people, how you formed the business, and what your bank asks for.

What is an EIN?

An Employer Identification Number, sometimes called a Federal Employer Identification Number (FEIN), is a unique nine-digit identifier the IRS assigns to a business. You use it to report business income, withhold and deposit employment taxes, pay employees, and open many business accounts instead of listing your personal Social Security number on every form.

Corporations and employers with W-2 staff always need one. Many self-employed side businesses do not, unless you hire workers, form an LLC or corporation, or hit one of the IRS exceptions (excise tax, certain retirement plans, bankruptcy).

An EIN stays with the business entity. If you incorporate or form an LLC later, you apply for a new number tied to that entity rather than reusing a personal identifier on business-only filings.

When your side business needs an EIN

IRS rules require an EIN in these cases, even for informal side gigs.

You hire workers

Any business with employees needs an EIN to report employment taxes and issue W-2 forms. That includes part-time helpers, seasonal staff, and paid contractors treated as employees under IRS rules. The IRS expects the number before you run your first payroll deposit.

Marco runs weekend catering and hires an assistant for big events. He needs an EIN before he runs payroll, deposits withholding, and sends W-2s. Without it, he cannot file employment tax returns correctly.

Get the EIN before the first paycheck if you will have W-2 employees. Line it up with state registration and workers’ comp if your state requires them. Late payroll deposits and returns can add penalties even when money is tight.

Paying someone on Form 1099-NEC does not by itself require an EIN for payroll. If the IRS would treat that person as an employee, you need an EIN and payroll setup. When in doubt, ask a payroll company before you cut the first check.

Your entity type requires it

Single-member LLCs are different. By default the IRS treats them as disregarded entities taxed like sole proprietorships. With no employees and no excise taxes, the owner can often use a Social Security number. Many owners still obtain an EIN to open bank accounts and keep the SSN off client forms.

Two friends opening a pop-up coffee cart as a partnership need an EIN before their first partnership return, whether or not they hire baristas. The number lets the IRS track partnership income, guaranteed payments, and each partner’s share of profit on Schedule K-1.

Corporations follow similar rules: C corporations and S corporations file under an EIN even when the owner is the only worker, because the entity exists separately from the individual for federal tax purposes.

You open a dedicated business bank account

Banks often require an EIN to open an account in the business name. That is bank policy, not an IRS rule, but it affects most side hustlers who want clean bookkeeping. Some banks accept an SSN for a sole proprietorship account; others insist on an EIN if the account title uses a trade name instead of your personal name.

Jordan sells custom prints on Etsy and opens a business checking account to separate supply purchases from personal spending. The bank requests an EIN even though Jordan files as a sole proprietor with no employees.

Mixing business and personal cash in one account does not change IRS rules, but it makes bookkeeping and audits harder. Many sole owners still get an EIN so the bank can open a business account even when Schedule C could use an SSN.

When you can skip the EIN

Many solo side businesses can use a Social Security number when none of the triggers above apply.

Sole proprietorship with no employees

If you are the only owner and do not pay W-2 wages, you can usually report income on your personal return using your SSN. Consulting, tutoring, or freelance design often fit this pattern when you file Schedule C and make estimated tax payments as needed.

You may still choose an EIN voluntarily to avoid giving vendors your SSN or to look more established on invoices.

A consultant who writes policy briefs on nights and weekends may report income with an SSN as the only owner with no payroll. Add a co-founder and form an LLC, and you will likely need an EIN for the new entity.

Reporting on Schedule C

Sole proprietors typically attach Schedule C to Form 1040. Because the business is not a separate legal entity for federal tax, the IRS permits SSN reporting when no EIN trigger applies. Keep income and expense records even if you never apply for an EIN.

A solo online reseller who ships every order alone can put gross receipts and expenses on Schedule C with an SSN. Incorporating later means new filings and a new EIN for the corporation.

Registering a DBA (doing business as) name with your state does not by itself require an EIN. The IRS still looks at whether you are a sole proprietor, partnership, or corporation under that trade name.

How to apply for an EIN

The IRS offers free EIN applications. Have your legal business name, structure, and responsible party information ready. State registration should usually be complete before you apply.

Online applicants identify the responsible party (usually the owner), state the entity type, and note expected hiring dates if employees are planned. Save the confirmation letter or PDF the IRS provides; banks often ask for it.

If you cannot apply online, fax usually returns a number in about four business days. Mail can take four to five weeks, so it is a poor choice when payroll or a bank appointment is already on the calendar.

Benefits even when EIN is optional

If you skip an EIN when the IRS requires one

Running payroll or filing as a partnership or corporation without an EIN can delay hiring, block tax deposits, and mess up returns. If the IRS asks questions later, mixed-up ID numbers on old forms slow the review.

Banks and merchant services may also refuse to open accounts until you have the right federal ID on file.

Penalties and interest on unpaid employment taxes can add up once payroll starts. If you already paid help without an EIN, apply right away and work with a payroll or tax preparer to catch up on deposits and returns.

The same number stays with the business until you close the entity or the IRS assigns a new one after a major structural change. You do not need a new EIN every tax year for the same sole proprietorship or LLC.

How Valor Tax Relief can help

Getting an EIN does not fix old tax debt. If you also have unfiled returns, IRS notices, or back taxes from mixed personal and business income, you still need to address those separately. Clear records help show which income belongs on Schedule C and which is W-2 wages.

Valor helps owners review what they owe, respond to the IRS, and explore installment agreements or back tax relief when balances stack up. Visit our small business owner hub for related guides.

Choosing the right ID for your side business

Match your EIN decision to employees, entity type, and bank needs. Sole owners with no payroll can often start with an SSN on Schedule C, while LLCs with multiple members or any hiring plan should apply early.

When rules feel unclear, a tax preparer can review your structure before you open accounts or issue the first paycheck. Getting the ID right upfront saves rework at tax time.

Applying online at IRS.gov is free. Store the confirmation with your LLC or corporation papers so banks, payroll software, and state offices see the same business name and ID.