The Federal Employer Identification Number, commonly known as the FEI or FEIN, is a unique nine-digit identifier assigned by the Internal Revenue Service (IRS) to businesses operating in the United States. This number functions like a social security number for a business, enabling the IRS to track tax obligations, payroll, and other regulatory reporting. Understanding the FEI is essential for forming, operating, and growing a compliant American business.
What The FEI Number Is And How It Is Used
The FEI (Federal Employer Identification Number) is issued by the IRS and appears in the format 12-3456789. It serves as the primary reference for a business in tax filings, employment reporting, and financial administration. The FEI is required for most entities, including corporations, partnerships, LLCs treated as corporations, non-profit organizations, and trusts with tax obligations. Specific uses include filing corporate income tax returns, employer payroll tax deposits, and opening business bank accounts that require tax identification.
FEI vs. Social Security Number: Key Differences
A business FEI is distinct from an individual Social Security Number (SSN). The SSN identifies a person, while the FEI identifies a legal business entity. Separating these identifiers helps protect personal information and improves accuracy in tax reporting and regulatory compliance. Even sole proprietors may obtain an FEI if they hire employees or establish a separate business entity; otherwise, their taxes may be reported under the owner’s SSN.
Who Needs A Federal Employer Identification Number
Most business entities require an FEI, including corporations, partnerships, LLCs, nonprofit organizations, and certain estates or trusts. Some sole proprietors may not need an FEI if they do not hire employees or operate with a separate business entity, but an FEI can still be advantageous for opening a business bank account or applying for business credit. State agencies or vendors may also require an FEI for licensing, contracts, or grant applications.
How To Apply For An FEI
Applying for an FEI is typically straightforward and can be completed online, by mail, or by phone for international applicants. The most common method is the online IRS apply system, which provides an immediate FEI if all information is correct. In other cases, the application is submitted using IRS Form SS-4, which collects essential details about the business, owners, and tax classification. Applicants should have information such as the legal name, trade name (if any), mailing address, structure type, responsible party, and the reason for applying.
- Online application: Fastest option; immediate confirmation and FEI number.
- Mail application: Requires Form SS-4; processing can take several weeks.
- Phone application (international): Available in certain situations; may provide an FEI immediately or within a few days.
During the application, it is essential to provide accurate details about the business structure, ownership, and contact information. Any discrepancies can delay the issuance of the FEI or trigger compliance questions later.
Common Uses Of The FEI
After obtaining an FEI, a business will likely use it in multiple areas of operation. These include:
- Filing federal tax returns (corporate income tax, partnership returns, or nonprofit filings).
- Payroll reporting and tax withholding for employees (Form 941, 940, and related state requirements).
- Opening and maintaining business bank accounts, credit lines, and merchant services.
- Filing information returns (such as Form 1099) for contractors and vendors.
- Registering for certain state tax accounts and business licenses.
- Seating contracts with clients, insurers, or government agencies that require a unique tax ID.
Updates, Changes, And When An FEI Is No Longer Needed
An FEI remains valid for the life of the business unless there is a change in legal structure, ownership, or name. If the business undergoes a significant change—such as converting from a sole proprietorship to a corporation or changing the entity’s legal name—an update to the FEI records may be required. Some changes can be reported online during the annual tax return process, while others may necessitate a new filing with the IRS.
Common Pitfalls And Best Practices
Several issues commonly occur with FEI management. Notably, misclassifying the entity type during application can lead to compliance problems. Errors in the responsible party information, such as the principal officer or owner, can trigger delays. It is also important to avoid sharing the FEI in insecure channels and to ensure the number is used strictly for legitimate business purposes.
- Do: Apply promptly after business formation; maintain up-to-date records with the IRS.
- Do not: Share the FEI publicly or use it in insecure communications unless necessary.
- Best practice: Use secure accounting software and limit access to the FEI to authorized personnel only.
Where To Find Help And Resources
Official guidance and forms are available on the IRS website, including Form SS-4 and the online FEI application portal. For businesses with international operations or complex ownership structures, consulting a tax professional can help ensure proper classification, compliance, and timely filings. Additionally, many state departments of revenue provide guidance on how FEI integration affects state taxes and registrations.