EIN for an Indiana LLP — Why You Need One and How to Get It

An Employer Identification Number is the nine-digit federal tax identifier the IRS assigns to a business. It functions as the business equivalent of a Social Security number — it identifies the partnership to the IRS, banks, and other institutions. You will see it referenced on tax filings, bank paperwork, and payroll documents throughout the life of the LLP.

For a limited liability partnership, an EIN is not optional the way it sometimes is for a single-owner business. A partnership is a distinct taxpayer that must file its own federal return, and that return requires an EIN. There is no version of an LLP that runs on a single partner's Social Security number.

Why an LLP always needs one

• The partnership files Form 1065: A partnership files the federal partnership return, Form 1065, which requires the entity to have an EIN.
• Partners receive K-1s: The partnership issues a Schedule K-1 to each partner reporting their share of income; these reference the partnership's EIN.
• Banks require it: To open a business account in the partnership's name, banks ask for the EIN.
• Payroll and employees: If the LLP has employees, the EIN is used for payroll tax withholding and reporting.
• Separation of finances: Using the partnership's EIN rather than a partner's SSN keeps that partner's personal identifier off business paperwork, which supports the separateness that underpins the liability shield.

Because these reasons apply to essentially every LLP, obtaining the EIN is one of the first things to do after registering the partnership with the state.

The sequence matters a little. It is generally best to register your LLP with the Indiana Secretary of State first, then apply for the EIN, so the IRS record reflects the correctly formed and named entity.

The typical order

1. Register the LLP: File the Statement of Qualification through INBiz and get confirmation the LLP exists.
2. Apply for the EIN: With the partnership formed and its exact legal name settled, apply to the IRS.
3. Open the bank account: With both the state confirmation and the EIN in hand, open the partnership's business bank account.

Applying for the EIN after the state registration avoids the awkward situation of getting an EIN under a name or structure that then changes. If your partnership name or structure shifts after you already have an EIN, you may have to update or, in some cases, obtain a new number — easier to avoid by sequencing it correctly.

Have your information ready

Before applying, know the partnership's exact legal name as registered, its principal business address, the responsible party's information, the reason you are applying (starting a new business), and the number of partners and expected employees. Having these ready makes the application quick.

The EIN is free directly from the IRS, and the online application is the fastest route. Do not pay a third party for the number itself — any fee you see for "getting an EIN" pays for a service, not the government's cost, which is zero.

Applying online

Apply through the IRS EIN Assistant at IRS.gov. The online application walks through a short series of questions about the partnership and its responsible party. It takes about ten minutes, and the EIN is issued immediately at the end — you can download and print the confirmation and begin using the number the same day, including at the bank.

The online application requires a responsible party with a valid US Social Security number or Individual Taxpayer Identification Number (ITIN). The responsible party is generally a partner who controls or manages the partnership.

Applying without an SSN or ITIN

If the responsible party does not have an SSN or ITIN, the partnership cannot use the instant online tool. Instead, apply by fax or mail using Form SS-4. This is slower — fax responses take a few business days and mail longer — but it is the correct route for partnerships whose responsible party lacks a US taxpayer number.

The responsible party

The IRS requires the application to name a responsible party — a real person who ultimately owns or controls the partnership, not another entity. For an LLP, this is typically one of the partners. The responsible party is who the IRS treats as the point of accountability for the entity's tax matters.

Once issued, the EIN follows the partnership for the rest of its existence and shows up in several routine contexts. Knowing where it is used helps you keep the partnership's paperwork consistent.

Common uses

• Opening the business bank account: Banks require the EIN, along with the state registration confirmation and usually the partnership agreement, to open an account in the LLP's name.
• Filing the partnership return: The EIN appears on the annual Form 1065 and on every K-1 issued to partners.
• Payroll and withholding: If the LLP has employees, the EIN is used for federal and state payroll tax accounts.
• State tax registrations: When registering for Indiana sales tax or withholding through the Department of Revenue, you use the EIN.
• Vendor and client paperwork: The EIN goes on W-9s the partnership provides to clients and is referenced on 1099s and similar documents.

Keep it secure and consistent

Treat the EIN as sensitive business information. Use the partnership's exact legal name consistently alongside the EIN across bank, tax, and vendor records — inconsistencies between the name on file with the IRS and the name used elsewhere can cause processing headaches. Store the IRS confirmation (the CP 575 notice, or a later 147C letter if you request one) with your permanent partnership records.

If information changes

If the responsible party changes, the IRS asks that you update it using Form 8822-B. Most ordinary changes — a new address, a new responsible party — are updates to the existing EIN rather than reasons to get a new one. A new EIN is generally only needed in specific structural changes; when in doubt, a CPA can tell you whether your change requires a new number.