Is an EIN the same as a tax ID? The differences between these and the ITIN

It’s important to understand the differences between generic and specific terms for tax identification numbers. For example, a taxpayer identification number, or tax ID, is a general term the IRS and other government agencies use to group types of tax IDs that help establish the identity of taxable entities or individuals.

An employer identification number (EIN) and the individual taxpayer identification number (ITIN) are specific tax ID numbers within this general grouping.

The most important tax identification numbers are:

• Social Security number (SSN)
• Employer Identification Number (EIN)
• Individual Taxpayer Identification Number (ITIN)

“Understanding the differences between EINs, ITINs and SSNs can affect how you set up payroll, file taxes and manage your operations. The numbers serve as official identifiers recognized by the IRS, so it’s paramount to use the correct one.”

—Ashlee Malet, MBA in accounting

Understanding the Individual Taxpayer ID Number

The Individual Taxpayer Identification Number (ITIN) is issued to individuals who do not qualify for a Social Security number but are still required to meet U.S. tax filing requirements. ITINs may be used in certain tax-related contexts, including some payroll and filing documents such as W-2 and W-3 forms.

However, the IRS specifies that an ITIN does not allow the following:

• Authorize someone to work in the United States
• Provide eligibility for Social Security benefits
• Automatically qualify someone for certain tax credits, such as an Earned Income Tax Credit

ITIN holders are generally not eligible for the Earned Income Tax Credit, although eligibility can depend on the taxpayer’s and dependents’ Social Security number status and other IRS rules.

The following are examples of individuals who might have an ITIN but no SSN:

• Nonresident aliens and other individuals who are not eligible for an SSN
• Individuals who are required to file U.S. taxes but are not eligible for an SSN
• Dependents and spouses of nonresident visa holders
• Spouses or dependents of U.S. citizens and residents who lack an SSN

How to request an ITIN

Residents and nonresidents of the United States, or their dependents and spouses, can request an Individual Taxpayer Identification Number by completing IRS Form W-7 and including supporting documentation that substantiates their immigration status and identity.

You can mail these forms to IRS acceptance agents, which may include colleges, financial organizations and other institutions authorized by the IRS to receive ITIN applications.

Role of Social Security numbers

Social Security numbers (SSNs) are generally the most important and widely used individual tax and identification numbers in the United States. SSNs are widely used for tax filing and many federal benefit and identity purposes in the United States.

Social Security numbers are often requested to open a bank account, apply for a passport, request public assistance, apply for federal, state or student loans and perform credit checks.

Nonresidents and certain types of residents and their spouses or dependents don’t typically qualify for Social Security numbers. In these cases, they may be eligible for an ITIN as their tax ID for tax reporting purposes.

Understanding the employer ID number

The Employer ID Number (EIN) is a federal tax ID specifically applied to business entities, even if they do not have employees, and not to private individuals. Why and when does a business need an EIN?

The EIN is the key number the IRS uses to identify businesses in the United States for income tax and other tax purposes. This number also has additional uses for businesses, such as:

• Applying for municipal, state and other licenses and permits
• Reporting and paying federal FICA taxes, such as payroll, income tax, social security and Medicare
• Applying for business loans
• Opening bank accounts in the name of their business

Does your business require an employer ID number?

Not all legally designated business types require an EIN. For example, sole proprietorships can usually use the owner’s Social Security number as a tax ID for federal and state tax purposes or opening small business bank accounts.

However, single-member LLCs may need an EIN depending on how they are taxed, whether they hire employees or if they open business accounts. If your company is registered as an LLC or another business entity, and you would like to apply for business loans or open a business bank account, an EIN may be necessary.

How to request an EIN

You can apply for an EIN with the IRS for free online, by mail or by fax through its website. Completing your EIN application means providing the IRS with your SSN or ITIN to prove the identification of the business owner.

The IRS considers this person the responsible party for the business. This responsible party must be a person, not another business entity.

Does your business also need a state tax ID number?

States also issue tax identification numbers, and the specifics and types may vary by jurisdiction. State tax ID numbers are often required if you’re earning income, forming a business, hiring employees or selling products and services in one or more states.

For more information about your state’s tax ID number for businesses or individuals, contact the tax authority relevant to where you live or do business.

Other special IRS tax ID numbers

The ATIN and PTIN are additional tax ID numbers the IRS uses for special circumstances.

ATIN

The IRS uses the Adoption Taxpayer Identification Number (ATIN) as a temporary ID code for individuals adopting a minor who is a U.S. citizen or resident but who lacks their own SSN. You can use the ATIN until an SSN is processed for tax filings in which the child is registered as a dependent.

PTIN

The Preparer Tax Identification Number (PTIN) is a special tax ID number issued to professional tax preparers and is required for anyone who is paid to prepare taxes. Individuals who prepare the tax forms of their dependents for free don’t typically require this number.

Understanding the distinctions between tax IDs is important for proper tax compliance, payroll management and business operations. Knowing when and how to apply for each helps support smooth IRS filings and avoid costly errors for both you and employees.