Getting an EIN for Your Texas Limited Partnership

Issued by the IRS, an Employer Identification Number is a nine-digit federal tax ID. It functions as the business equivalent of a Social Security number: it identifies your partnership on tax filings, bank paperwork, and payroll. The IRS issues it at no cost.

Why a limited partnership always needs one

Unlike a single-member LLC — which can sometimes get by on the owner's Social Security number — a limited partnership always needs an EIN. The reason is structural: a partnership is a multi-party entity that files its own federal return and reports each partner's share of income separately.

• The partnership files Form 1065. A limited partnership files an informational federal return, and that return requires an EIN.
• Partners receive Schedule K-1s. The LP issues each partner a K-1 reporting their share of income, deductions, and credits — again tied to the partnership's EIN.
• Banks require it. No bank will open a partnership account without an EIN.
• Payroll requires it. If the LP has employees, the EIN is mandatory for withholding and payroll tax filings.

There is no scenario where a functioning Texas LP operates without an EIN. Getting it is one of the first things you do after the state accepts your Certificate of Formation.

Timing matters. Apply for your EIN after the Secretary of State has accepted your Certificate of Formation, not before. The EIN is issued to a legal entity, and until the LP formally exists, there is nothing for the number to attach to.

The right sequence

• File and get accepted. Submit the Certificate of Formation and wait for the state to accept it. Online SOSDirect filings clear in a few business days.
• Then apply for the EIN. With the entity officially formed, apply to the IRS. The number is issued immediately when you apply online.
• Then open the bank account. With the file-stamped certificate and the EIN in hand, you can open the partnership's bank account.

Applying for an EIN before the LP exists creates mismatches — a number tied to an entity the state has not recognized — that cause headaches at the bank and on tax filings. Wait for formation, then apply.

The IRS offers several ways to get an EIN, and for most Texas LPs the online application is the fastest and simplest. It is free directly from the IRS — you never need to pay a third party for the number itself.

The online application

Apply through the EIN Assistant at IRS.gov. The session takes about ten minutes, and the EIN is issued immediately at the end — you can download the confirmation letter and use the number the same day. A few practical notes:

• You need a responsible party. The application asks for a responsible party — generally a person who controls or manages the LP, often a general partner — with a valid US Social Security number or ITIN.
• Complete it in one sitting. The online session times out after a period of inactivity, so have your information ready before you start.
• One EIN per responsible party per day. The IRS limits online applications to one per responsible party each day.

If you cannot apply online

Applicants without a US Social Security number or ITIN cannot use the online tool. In that case, you apply by fax or mail using Form SS-4. This is slower — fax responses take a few business days, mail considerably longer — but it is the route for international responsible parties.

The SS-4 application, whether online or on paper, asks a handful of questions about the partnership. Knowing them in advance makes the process quick and prevents second-guessing mid-application.

The key items

• Legal name and address of the LP exactly as formed with Texas.
• Entity type. You select "partnership" — a limited partnership files as a partnership for federal purposes by default.
• Responsible party. The name and taxpayer ID (SSN or ITIN) of the person controlling or managing the LP.
• Reason for applying. Usually "started a new business."
• Date the business started and expected number of employees, if any.
• Principal activity. A brief description of what the partnership does.

A note on tax classification

By default the IRS treats your LP as a partnership, which is almost always what you want — pass-through taxation with income flowing to the partners. In rare cases a partnership might elect corporate tax treatment, but that is a deliberate choice made with an accountant, not something to stumble into on the EIN application. If you are unsure, take the default and revisit classification with your CPA.

Once issued, the EIN becomes the backbone of your partnership's financial and tax identity. Keep the confirmation letter somewhere safe — banks and agencies ask for it, and getting a replacement from the IRS is a hassle.

Where the EIN shows up

• Business bank account. Banks require the EIN alongside your file-stamped Certificate of Formation and, often, the limited partnership agreement.
• Federal returns. The EIN identifies the LP on its Form 1065 and on every Schedule K-1 issued to partners.
• State tax accounts. You use it when registering for Texas sales tax or setting up franchise tax accounts with the Comptroller.
• Payroll and vendor paperwork. Employees' payroll and vendor W-9s reference the EIN.

How this connects to Texas compliance

The EIN is federal, but it threads into your Texas obligations. Your Comptroller franchise tax account and any sales tax permit reference the partnership's federal identity, and clean, consistent use of the EIN across federal and state filings keeps your records coherent. Mainstay Filing focuses on the state-facing formation and registered agent work; obtaining the EIN is a quick, free step you can complete yourself at IRS.gov once your LP is formed, and we are glad to point you to the right starting place.