State Guide
EIN in Mississippi (MS)
How to get an EIN for your Mississippi business or LLC. The EIN is a federal number from the IRS. Non-residents apply by fax with a passport, no SSN needed. $49 Standard, $97 Express.
Getting an EIN in Mississippi uses the same federal IRS process as every other state. The EIN is a federal number — not state-specific. Non-residents apply by faxing Form SS-4 to the IRS with a passport number on Line 7b. No SSN or ITIN is needed. The IRS charges $0. ein.so prepares and faxes your SS-4 and delivers your EIN by email. Standard costs $49 (4-7 business days). Express costs $97 (2-3 business days).
Mississippi (MS) is a US state in the Deep South with a low cost of operating and a 0-5% state income tax structure. Founders who form a Mississippi LLC — whether US-based or non-resident — need a federal EIN before they can open a bank account, hire staff, or file federal taxes. The EIN is the same 9-digit number (XX-XXXXXXX) in Mississippi as it is in Wyoming or California. This guide explains the federal SS-4 process, how non-residents apply without an SSN, how the EIN differs from Mississippi state tax registration, and what to do after approval.
| Detail | Information |
|---|---|
| State | Mississippi (MS) |
| State income tax | 0-5% (confirm current brackets with a CPA) |
| State tax authority | Mississippi Department of Revenue |
| LLC formation authority | Mississippi Secretary of State |
| Federal EIN | Same as all states (IRS) |
| EIN cost | $0 (IRS) / $49 (ein.so Standard) |
| IRS EIN fax number | 855-215-1627 |
State vs Federal
Is a Mississippi EIN Different From a Federal EIN?
A Mississippi EIN is not a separate thing — the EIN is one federal number issued by the IRS and used in all 50 states. Mississippi does not issue its own EIN. The same 9-digit number works for your federal tax filing, banking, and payroll nationwide.
Many new business owners confuse the federal EIN with Mississippi state tax registration. They are two different numbers from two different agencies. You may need both, depending on what your business does in the state.
| Number | Issued By | Purpose |
|---|---|---|
| Federal EIN (XX-XXXXXXX) | IRS | Federal taxes, banking, payroll, Form 5472 |
| Mississippi state tax ID | Department of Revenue | State sales tax, state withholding |
Your federal EIN does not replace Mississippi state tax registration. If you sell taxable goods or hire employees in Mississippi, register with the Mississippi Department of Revenue separately. The EIN comes from the IRS through Form SS-4, and the process is identical in every state.
Non-Residents
How Does a Non-Resident Get an EIN for a Mississippi LLC?
A non-resident gets an EIN for a Mississippi LLC by faxing Form SS-4 to the IRS at 855-215-1627 with a passport number on Line 7b. No SSN or ITIN is required. The IRS issues most error-free EINs within 4-7 business days.
The IRS online EIN tool requires the responsible party to have an SSN or ITIN. Non-residents without an SSN cannot use it. The fax method is the path for international applicants, and it is the method ein.so handles end to end.
Form Your Mississippi LLC
Gather Your Documents
Complete Form SS-4
Fax and Receive Your EIN
Mississippi SS-4 Field Guide
| SS-4 Field | Entry |
|---|---|
| Line 1 (Legal name) | Your Mississippi LLC name |
| Line 4 (Mailing address) | Your home-country address |
| Line 7a (Responsible party) | Your full name as on your passport |
| Line 7b (SSN/ITIN/EIN) | Your passport number |
| Line 10 (Reason) | Started new business |
| Line 16 (Principal activity) | E.g., "e-commerce," "software," "consulting" |
The most common rejection cause for non-residents is malformed international address formatting on Line 4. The IRS silently rejects addresses it cannot parse. See the full EIN without SSN guide and the complete how-to-get-EIN walkthrough.
How to Apply
What Are the Ways to Get an EIN in Mississippi?
There are four ways to get an EIN in Mississippi, and all four go through the IRS. The method you use depends on whether you have an SSN. Non-residents without an SSN use fax.
| Method | Speed | Cost | SSN Needed? |
|---|---|---|---|
| Online (irs.gov) | Instant | $0 | Yes |
| Fax (855-215-1627) | 4-7 business days | $0 / $49 | No |
| Phone (international) | Same call | $0 | No |
| 4-6 weeks | $0 | No |
The fax method works for everyone and does not require an SSN, which is why it is the standard route for non-residents. The phone option (800-829-4933) is restricted to international applicants and means long-distance calls during US business hours. Mail is the slowest path at 4-6 weeks.
ein.so files the SS-4 by fax on your behalf and tracks it to issuance, so you avoid international calls and silent rejections. Standard is $49 (4-7 business days). Express is $97 (2-3 business days). The IRS itself charges $0. See EIN cost and EIN processing time for the full breakdown. Browse the general guide at EIN for non-residents.
After Approval
What Do You Do After Getting an EIN in Mississippi?
After getting an EIN in Mississippi, you register for state tax, open a US bank account, file your federal BOI report, and set up payments. The EIN is the federal anchor; the remaining steps connect your Mississippi LLC to banking and compliance.
Register With the Department of Revenue
Open a US Business Bank Account
File Your BOI Report
Set Up Payments and Platforms
Tax Considerations
What Federal Tax Filings Does a Foreign-Owned Mississippi LLC Have?
A foreign-owned single-member Mississippi LLC files Form 5472 with a pro-forma Form 1120 with the IRS each year. The penalty for not filing is $25,000. This is an information return, not automatically a tax bill. State filings are separate and handled with the Mississippi Department of Revenue.
US Filing: Form 5472 + 1120
Disregarded Entity Treatment
Mississippi State Reporting
BOI Report to FinCEN
ein.so handles the EIN application and does not provide tax advice. For federal income tax, state tax, and treaty questions, work with a US CPA familiar with non-resident matters. Your EIN is the starting point for US tax compliance, not the end of it. See our EIN without SSN guide.
Next Steps
After Getting Your EIN in Mississippi
- Apply for your EIN — ein.so files Form SS-4 by fax for non-residents, $49 Standard or $97 Express
- Open a US bank account — Mercury, Relay, and Wise accept non-resident LLC owners
- File your BOI report — required for most LLCs, free at fincen.gov/boi
- File Form 5472 — annually for foreign-owned LLCs ($25,000 penalty for non-filing)
- Read the SS-4 form guide — line-by-line help for the EIN application
Need an EIN without an SSN? Check EIN processing time and EIN cost before you file.
Other states: Arkansas | Kansas | Nebraska | Hawaii. Browse all on EIN by State.
Frequently Asked Questions
Is a Mississippi EIN different from a federal EIN?
No. The EIN is a single federal number issued by the IRS. It is the same 9-digit number (XX-XXXXXXX) whether your business operates in Mississippi, Texas, or any other state. Mississippi does not issue its own version of an EIN. You use one EIN for all federal tax reporting nationwide.
How do I get an EIN for a Mississippi business?
Apply through the IRS by one of four methods: online at irs.gov (instant, but requires an SSN), by fax to 855-215-1627 (4-7 business days), by phone at 800-829-4933 (international applicants only), or by mail (4-6 weeks). ein.so files the SS-4 by fax for non-residents for $49 Standard or $97 Express.
Can a non-US resident get an EIN for a Mississippi LLC without an SSN?
Yes. Non-residents do not need an SSN or ITIN to get an EIN. You enter your passport number on Form SS-4 Line 7b and fax the form to 855-215-1627. The IRS online tool requires an SSN, so non-residents must use the fax method. ein.so handles the full filing for $49.
How much does it cost to get an EIN in Mississippi?
The IRS charges $0 for an EIN in every state, including Mississippi. ein.so charges $49 (Standard, 4-7 business days) or $97 (Express, 2-3 business days) to prepare and fax Form SS-4 for non-residents. Forming a Mississippi LLC through the Secretary of State is a separate state fee.
Does Mississippi have a separate state tax ID?
Yes. Mississippi registers businesses through the Department of Revenue for state-level taxes such as sales tax and withholding. This state registration is separate from your federal EIN. Many Mississippi businesses need both. Your EIN does not replace state tax registration. Confirm your state obligations with a Mississippi CPA.
Do I need to form a Mississippi LLC before getting an EIN?
No federal rule requires a formed entity first, but most non-residents form the LLC first so the EIN attaches to a real legal entity. You register the LLC with the Mississippi Secretary of State, then file Form SS-4 with the LLC name on Line 1. ein.so can file your EIN once your LLC exists.
How long does it take to get an EIN for a Mississippi business?
Through ein.so, Standard processing takes 4-7 business days ($49) and Express takes 2-3 business days ($97). A DIY fax to 855-215-1627 takes 4-7 business days if the SS-4 has no errors. The IRS online tool issues an EIN instantly, but only applicants with an SSN can use it.
What annual filings does a foreign-owned Mississippi LLC have?
A foreign-owned single-member US LLC files Form 5472 with a pro-forma Form 1120 each year with the IRS. The penalty for not filing is $25,000. The LLC also files a Mississippi annual report and may owe state tax. Confirm your exact obligations with a US CPA who handles non-resident filings.
Can I open a US bank account with my Mississippi LLC and EIN?
Yes. Mercury, Relay, and Wise accept non-resident Mississippi LLC owners with an EIN and a passport. You receive US account and routing numbers for ACH and domestic wires. Banks ask for your Articles of Organization, EIN assignment letter (CP 575), and Operating Agreement. See our EIN for a bank account guide.
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