Getting an EIN for a Mississippi Limited Partnership

An Employer Identification Number is the nine-digit federal tax identification number the IRS assigns to a business. Think of it as the business equivalent of a Social Security number — it identifies the partnership to the federal government for tax purposes and to banks and other institutions.

Why a limited partnership always needs one

A limited partnership is a multi-owner, pass-through entity, and that alone requires an EIN. Here's the concrete reasoning:

• The LP files its own tax return. A partnership files IRS Form 1065 and issues Schedule K-1s to the partners. That return is filed under the partnership's EIN, not any individual's Social Security number.
• You can't run partnership banking on a personal SSN. Banks require the entity's EIN to open a partnership account, and mixing partnership money into a personal account undermines the separation the LP depends on.
• It keeps partners' SSNs off business paperwork. The EIN is what appears on vendor forms, contracts, and filings, so no partner's personal number circulates.

Unlike a single-member LLC, which can sometimes get by on the owner's SSN, an LP has multiple partners and a partnership return — so there's no scenario where skipping the EIN makes sense.

Timing matters. The EIN is tied to an existing entity, so the sequence relative to your state filing is worth getting right.

Form the LP first

Apply for the EIN after the Certificate of Limited Partnership is filed and accepted by the Mississippi Secretary of State. Applying before the entity exists risks a mismatch between the name you register with the IRS and the name on the state record. Let the state filing clear — which usually takes about one to two business days online — then apply for the EIN.

Do it before banking and taxes

You'll need the EIN before you can open the partnership's bank account, so get it early in the setup sequence rather than at the last minute. Since the EIN issues immediately when you apply online, it doesn't have to be a bottleneck — you can have the LP's certificate and its EIN within a couple of days of each other.

Applying for an EIN is free and, for most applicants, fast. The IRS never charges for an EIN, so ignore any third-party site that presents a government fee.

The online route (fastest)

• Go to the IRS EIN application on IRS.gov.
• Select that you're applying for a partnership.
• Provide the LP's legal name exactly as registered in Mississippi, the office address, and the formation details.
• Identify the responsible party — generally a general partner who controls the entity — with their Social Security number or ITIN.
• Submit, and the EIN is issued on the spot. Save and print the confirmation notice.

The online application takes about ten minutes and is available during the IRS's posted hours. The number is usable immediately for banking and filings.

The fax or mail route

If no responsible party has a U.S. SSN or ITIN, the online tool won't work. You apply instead using Form SS-4, submitted by fax or mail. Fax responses generally come back within a few business days; mail takes considerably longer. International applicants can also apply by phone through the IRS's dedicated line.

Gathering the details beforehand makes the application quick and prevents a rejected or mismatched filing.

Have these ready

• The LP's exact legal name as it appears on the accepted Certificate of Limited Partnership. Even small discrepancies can cause problems later, so match it precisely.
• The partnership's office address.
• The responsible party's name and SSN or ITIN. The IRS wants a real individual who ultimately controls the entity — for an LP, that's typically a general partner.
• The reason for applying (starting a new business) and the expected number of employees, if any.

Choose the responsible party carefully

The IRS limits the responsible party to a person who exercises ultimate control over the entity — you can't just name whoever's convenient. For a limited partnership, that's a general partner, since limited partners are passive investors without control. Naming a limited partner as the responsible party misrepresents who controls the LP.

A few recurring errors cost applicants time or money. None are hard to avoid once you know them.

Paying for a free number

The most common mistake is paying a third-party site that charges to "obtain" an EIN. The IRS issues it free. If you value the convenience of having someone else handle it as part of a formation package, that's a legitimate service — but understand you're paying for the convenience, not for the number.

Applying before the entity exists

Requesting an EIN before the state has accepted the Certificate of Limited Partnership can create a name mismatch between the IRS and the Mississippi record. Form the LP first, then apply.

Name mismatches

If the name you give the IRS doesn't match the LP's registered name, you can run into trouble at the bank and with future filings. Use the exact registered legal name.

Naming the wrong responsible party

Listing a limited partner as the responsible party misstates who controls the entity. Use a general partner. If control genuinely sits with an entity that serves as general partner — say an LLC — the responsible party is the individual who controls that entity.