EIN Guide for a Pennsylvania Corporation — Get Your Federal Tax ID

An Employer Identification Number is a nine-digit federal tax identification number the IRS assigns to a business. Think of it as the corporation's Social Security number — it identifies the entity on tax filings, bank accounts, payroll, and dealings with vendors and agencies. It's written in the format 12-3456789.

Why a corporation always needs one

Unlike a single-member LLC, which can sometimes get by on the owner's Social Security number, a corporation always needs its own EIN. The reason is structural: a corporation is a separate taxpayer that files its own federal return (Form 1120 for a C corporation, Form 1120-S for an S corporation). It can't file under an individual's SSN because it isn't an individual. So the EIN isn't optional for a corporation — it's a foundational requirement, and one of the first things to handle after formation.

What you'll use it for

• Filing federal corporate tax returns
• Opening a corporate bank account — banks require the EIN
• Hiring employees and running payroll — the EIN identifies you for employment taxes
• Registering for Pennsylvania state tax accounts
• Establishing vendor accounts and business credit

Timing matters. The EIN sits in the middle of your formation sequence — after the corporation legally exists, before you can really operate.

Wait until the corporation exists

Apply for the EIN after your Articles of Incorporation are filed and the corporation is on the record, not before. The EIN attaches to a specific legal entity, so the corporation needs to exist first. If you apply before formation and the details don't match, you can end up with a mismatched or duplicate record that's a headache to fix.

But get it early once you're formed

As soon as the corporation is formed, the EIN is one of the first things to handle, because almost everything else depends on it. You can't open the corporate bank account without it, you can't register for Pennsylvania tax accounts cleanly without it, and you can't run payroll without it. In practice, the EIN comes right after formation and right before the bank account.

The IRS issues EINs directly, and it's free. The fastest route is the online application, which delivers the number immediately.

Online application — the standard route

Apply through the IRS EIN Assistant. The application takes about ten minutes, and once you complete it, the EIN is issued immediately — you can download the confirmation letter (CP 575) and use the number the same day. A few practical notes:

• The online tool is available during posted IRS hours, generally weekdays, not around the clock.
• You'll identify the responsible party — a real person who controls the corporation, with their SSN or ITIN.
• You complete the application in one session; it doesn't save partway through.

If you don't have an SSN or ITIN

The online application requires the responsible party to have a US SSN or ITIN. If yours doesn't, you can still get an EIN by filing Form SS-4 by fax or mail. This is common for non-US founders of Pennsylvania corporations. It takes longer than the instant online route, so plan ahead if this is your situation.

Watch for paid look-alike services

The IRS never charges for an EIN. Some third-party websites present themselves as official and charge a fee to "obtain" the number for you. You don't need them — the IRS application is free and straightforward. If a site is asking for payment just to get an EIN, it isn't the IRS.

Having your information ready makes the application quick. Gather these before you start.

The checklist

• The corporation's exact legal name as it appears on the filed Articles of Incorporation
• The formation state (Pennsylvania) and the corporation's address
• The responsible party's name and SSN or ITIN — the individual who controls the corporation
• The type of entity (corporation) and the reason you're applying (started a new business)
• The number of employees you expect in the next year, if any, and your expected start date for payroll

Match the details to your filing

The name and details on the EIN application should match your Articles of Incorporation exactly. A mismatch between the IRS record and the state record causes friction later — with banks, with the Pennsylvania Department of Revenue, and at tax time. Consistency across all three (state filing, EIN, and your bank) keeps everything aligned.

The EIN unlocks the next steps of getting the corporation operational. Once it's issued, move on the pieces that were waiting on it.

Immediate next steps

• Open the corporate bank account. Bring the stamped Articles of Incorporation, the EIN confirmation, and your bylaws and organizational minutes. A dedicated account is essential to keeping corporate and personal finances separate — which is what keeps the liability shield defensible.
• Register for Pennsylvania tax accounts. Use the EIN to register with the Pennsylvania Department of Revenue for the state tax accounts your business needs — corporate net income tax, employer withholding, sales tax, depending on your activity. Pennsylvania handles business tax registration through its own system, separate from the corporate formation filing.
• Set up payroll if you'll have employees, using the EIN for federal and state employment tax reporting.

Keep the confirmation safe

Store your EIN confirmation letter with your corporate records. You'll reference the number constantly, and having the official IRS confirmation on hand saves time whenever a bank, agency, or vendor asks you to verify it. If you ever lose the number, you can retrieve it from a prior tax filing or by contacting the IRS, but keeping the original confirmation is far simpler.