Getting an EIN for a Pennsylvania LLP

The IRS assigns each business a nine-digit federal tax identification number called an Employer Identification Number. Think of it as a Social Security number for your business — it identifies the partnership on tax filings, bank accounts, payroll, and official paperwork.

Why a partnership always needs one

Unlike a single-member LLC, which can sometimes get by on the owner's Social Security number, a partnership always needs an EIN. A partnership files its own federal information return (Form 1065), and that return requires an EIN. There is no version of a compliant multi-partner firm that skips this. As soon as you have two or more partners, you need the number.

What you use it for

• Filing the partnership's federal return and issuing Schedule K-1s to partners
• Opening a business bank account in the partnership's name
• Handling payroll and employment taxes if you have employees
• Providing a tax ID to clients, vendors, and financial institutions that request one

Timing matters more than people expect. The right moment to get your EIN is after your LLP registration is on file, but before you try to do anything that requires the number.

The usual sequence

• Register the LLP with the Pennsylvania Department of State first, so the partnership legally exists.
• Apply for the EIN once the registration is in hand, using the exact legal name of the partnership.
• Then open the bank account, set up payroll, and handle anything else that needs the number.

Applying for the EIN before the LLP is registered risks a mismatch between the name on your EIN and the name on your state record — a small discrepancy that can cause friction later with banks and the IRS. Register first, then get the EIN with the matching name.

The IRS issues EINs at no cost. Anyone charging you a mandatory fee for the EIN application itself, as a standalone, is charging for something the IRS gives away.

The online application (fastest)

• Go to the IRS EIN Assistant at IRS.gov, the only official source.
• Select "partnership" as your entity type — this is the correct choice for an LLP, since an LLP is a partnership for federal tax purposes.
• Provide the partnership's legal name, address, and formation details.
• Identify a responsible party — a partner who controls or manages the partnership — with their Social Security number or ITIN.
• Submit the application. The EIN is issued immediately on screen; you can download the confirmation and use the number the same day.

The online application is available during IRS operating hours and must be completed in one session, since it times out after a period of inactivity. Have your information assembled before you start.

If you can't apply online

A responsible party without a US Social Security number or ITIN cannot use the online tool. In that case, apply by fax or mail using Form SS-4. Fax is considerably faster than mail — often several business days versus several weeks. International applicants have a phone option as well.

Gathering these in advance makes the application quick and keeps you from getting stuck partway through.

• The partnership's exact legal name, as it appears on your Pennsylvania LLP registration
• The business mailing address
• The responsible party's name and SSN or ITIN
• The number of partners and the type of entity (partnership)
• The date the business started or will start
• Your reason for applying (started a new business, hired employees, opened a bank account, and so on)
• Whether you expect to have employees, and if so, roughly when and how many

Choosing "partnership" as the entity type is the point people most often get wrong for an LLP. Because the name says "limited liability," some applicants reach for an LLC option. For federal tax purposes an LLP is taxed as a partnership, so partnership is the correct selection.

A few predictable errors cause most of the EIN headaches firms run into.

Paying a third party for the number itself

The EIN is free from the IRS. Some sites present themselves as official and charge for the application. You can always apply directly at IRS.gov for nothing. It is legitimate to pay a filing service to handle the paperwork as part of a broader package, but no one should tell you the EIN itself has a mandatory cost.

Applying with a mismatched name

Apply after your LLP is registered and use the exact legal name on your state record. A name mismatch between your EIN and your registration causes avoidable trouble when you open bank accounts and file returns.

Picking the wrong entity type

Select "partnership," not an LLC or corporation option, for an LLP. The wrong selection can misclassify how the IRS expects you to file.

Requesting more than one EIN

A partnership needs one EIN. If you apply twice or the tool errors out and you retry, you can end up with duplicate numbers, which then have to be untangled with the IRS. Apply once, and if something goes wrong, call the IRS rather than reapplying blindly.

As part of registering your Pennsylvania LLP, Mainstay Filing can obtain the EIN for you, using the exact legal name that appears on your state registration so there is never a mismatch to clean up later. We select the correct entity type — partnership — and provide the confirmation once the IRS issues the number.

This folds the EIN into the same process as your registration, so you come out the other side with the number in hand and ready to open a bank account and set up payroll. If you would rather apply yourself, that is entirely fine — the IRS EIN Assistant is free and straightforward once your LLP is registered. Either way, the important thing is to do it in the right order, with the right name and the right entity type.