FEIN: What is it? Why is it important to your business?

A Federal Employer Identification Number (FEIN), also known as an Employer Identification Number (EIN), is a unique nine-digit identifier issued by the Internal Revenue Service (IRS) to identify businesses for federal tax purposes. Many organizations need a FEIN to hire employees, process payroll, file taxes, open business bank accounts, and meet regulatory requirements. This guide explains what a FEIN is, when businesses need one, how to apply, and why it plays a central role in payroll and business compliance.

What is a FEIN number?

A Federal Employer Identification Number (FEIN) is a nine-digit number issued by the IRS to identify businesses and other legal entities for federal tax administration. Similar to how individuals use a Social Security number (SSN), businesses use a FEIN when filing tax returns, reporting payroll taxes, and completing other government filings.

Although many organizations refer to it as a FEIN, the IRS officially uses the term Employer Identification Number (EIN). Both terms describe the same federal tax identification number.

For most employers, a FEIN serves as the primary identifier used across payroll, banking, licensing, and tax reporting activities.

What is a FEIN used for?

A FEIN supports many essential business operations beyond filing taxes. Once issued, it becomes part of an organization's identity when interacting with government agencies, financial institutions, and business partners.

Common uses include:

• Filing federal business tax returns.
• Reporting payroll taxes and employee wages.
• Opening business bank accounts.
• Applying for business licenses and permits.
• Hiring employees.
• Establishing business credit.
• Completing vendor, insurance, and financial documentation.

For HR, payroll, and finance teams, it is used regularly throughout the employee lifecycle and ongoing business operations.

Who needs a FEIN?

Not every business is required to obtain a FEIN, but many organizations must have one under federal tax rules.

Businesses that commonly require a FEIN include:

• Corporations.
• Partnerships.
• Multi-member LLCs.
• Nonprofit organizations.
• Trusts and estates with certain tax filing obligations.
• Businesses that hire employees.

Some sole proprietors without employees may use their Social Security number for federal tax purposes. However, many still choose to obtain it to separate personal and business information or prepare for future growth.

How to apply for a FEIN?

The IRS provides several methods for applying for a FEIN, with online applications generally offering the fastest processing time.

The application process typically includes:

1. Determine your eligibility.
2. Gather your business information.
3. Complete the IRS application.
4. Submit the application.
5. Save the confirmation notice for your records.

Businesses that qualify for the IRS online application often receive their FEIN immediately after successful submission. Applicants who file by mail or fax generally experience longer processing times.

How long does it take to receive a FEIN?

Processing time depends on how the application is submitted.

Because processing timelines may change, businesses should review the latest guidance available through the IRS before applying.

Where can you find your FEIN?

If your business has already received a FEIN, there are several places where you can locate it.

Your FEIN may appear on:

• IRS confirmation notices, including the original issuance letter.
• Previously filed federal tax returns.
• Payroll records.
• Business bank account documentation.
• Financial statements maintained by your accountant or bookkeeper.

If you cannot locate your FEIN, the IRS may be able to assist after verifying your identity.

Is a FEIN the same as an EIN?

Yes. FEIN (Federal Employer Identification Number) and EIN (Employer Identification Number) refer to the same nine-digit federal tax identification number issued by the IRS.

Although many businesses, financial institutions, and payroll providers continue using the term FEIN, the IRS primarily refers to the identifier as an EIN. Both terms are widely accepted and may be used interchangeably.

How does HR use a FEIN?

Human resources and payroll teams rely on the FEIN throughout the employment lifecycle. It serves as a key identifier when processing payroll, administering benefits, and completing required tax reporting.

Common HR uses include:

• Payroll tax reporting.
• Employee onboarding documentation.
• Form W-2 reporting.
• Benefits administration.
• Employment tax compliance.
• Coordination with payroll providers and government agencies.

Maintaining accurate FEIN records helps reduce payroll errors and supports compliance with federal reporting requirements.

How does a FEIN apply to different business structures?

FEIN requirements vary depending on how a business is organized.

Businesses should verify their specific filing obligations with the IRS or a qualified tax professional, particularly when organizational structures or tax elections change.

Is there a cost to obtain a FEIN?

The IRS issues FEINs free of charge. Businesses can apply directly through the official IRS application process without paying an application fee.

Although third-party companies may offer application assistance for a fee, they are not required to obtain a FEIN. Applying directly through the IRS remains the most cost-effective option.

A FEIN is more than a federal tax identifier—it supports payroll, tax reporting, banking, licensing, hiring, and many other core business functions. For employers, obtaining and maintaining an accurate FEIN helps ensure smooth operations while supporting compliance with IRS reporting requirements.

As organizations grow, HR, payroll, finance, and business leaders should treat the FEIN as a foundational part of their compliance infrastructure. Businesses should also verify current federal and state requirements with the IRS or a qualified tax professional when applying for or using a FEIN.