What Is an EIN? (Employer Identification Number) – Complete Guide for U.S. & Non‑U.S. Founders

An employer identification number (EIN) is a unique nine digit number in the format XX-XXXXXXX that the internal revenue service (IRS) assigns to business entities operating in the United States. Think of it as a social security number for your business—it’s used for federal tax reporting, opening a business bank account, paying employment taxes, and interacting with financial institutions.

Most LLCs, corporations, multi-member partnerships, and any business that plans to hire employees need an EIN. Even single-member LLCs often obtain one to keep personal and business finances separate, improve privacy, and access merchant accounts like Stripe or PayPal.

Non-U.S. founders without an SSN can absolutely obtain an EIN, though the process involves additional steps and longer timelines. FormYourCorp specializes in handling this for Wyoming LLC owners end-to-end, managing IRS forms, communication, and follow-up so international founders can focus on building their business.

An EIN does not expire and cannot be reissued to another entity. You generally only need a new EIN when your business structure fundamentally changes—such as converting from a sole proprietorship to a corporation.

FormYourCorp’s Wyoming LLC packages include beneficial ownership reporting guidance and direct support for unlocking U.S. business banking and payment processors.

An employer identification number EIN is a unique nine digit number issued by the internal revenue service IRS to identify U.S. business entities for federal tax and reporting purposes. Just as an individual uses their taxpayer identification number for personal taxes, a business uses its EIN as a federal tax identification number to interact with government entities, banks, and vendors.

The EIN functions like a social security number but for your business. It’s required for filing a federal tax return, paying income taxes and employment taxes, and handling payroll. Banks, payment processors, and government agencies all use this federal employer identification number to verify your legal entity and track your tax obligations.

The standard IRS format is XX-XXXXXXX (two digits, a hyphen, then seven digits). Unlike an SSN, an EIN is considered less sensitive—businesses routinely share it on invoices, W-9 forms, and official business registrations. This id number is essentially public information once your company is operating.

The following entity types can receive an EIN:

• LLCs (single-member and multi-member)

• C corporations and S corporations

• Partnerships

• Sole proprietors with employees or certain tax filing requirements

• Non-profits and tax exempt organizations

• Trusts and estates

• Foreign-owned U.S. entities

FormYourCorp focuses specifically on Wyoming LLC formation for global founders and always secures an EIN as part of its all-in-one formation process. Whether you’re a U.S. resident or building a business from overseas, the EIN is your gateway to legitimate U.S. business operations.

Whether you “must” have an EIN depends on your business structure, number of owners, employees, and certain tax activities. The IRS has clear requirements, but many businesses obtain an EIN even when not strictly required.

When the IRS Requires an EIN

The IRS mandates you need an EIN in these situations:

• Your LLC has more than one member (multi-member LLC)

• You operate as a corporation (C-Corp or S-Corp)

• You hire employees or plan to hire employees

• You file employment taxes, excise taxes, or certain federal specialty taxes

• You withhold taxes on income paid to a non resident alien

• You operate a Keogh retirement plan

• You’re involved with trusts, estates, or non-profits with tax reporting obligations

Multi-member LLCs and partnerships must always have an EIN for filing information returns and issuing Schedule K-1s to owners. There’s no exception here.

When an EIN Is Optional but Recommended

Single-member LLCs and sole proprietors without employees are not always required to obtain an EIN. However, most choose to get one for these practical reasons:

• Privacy protection: Using your SSN publicly exposes you to identity theft risk

• Banking requirements: Most banks require an EIN to open a bank account for a business

• Merchant accounts: Stripe, PayPal, and other processors typically require an EIN

• Building business credit: Establishing credit under your business name requires separating business finances from personal finances

• Professional credibility: Clients and vendors requesting a W-9 expect to see an EIN

Non-U.S. and Foreign-Owned Businesses

Foreign-owned U.S. LLCs and corporations almost always need an EIN. Even if you have no U.S. employees and limited U.S. tax obligations, you’ll need this federal tax id number to:

• Open a U.S. business bank account

• Receive payments from U.S. platforms and clients

• File any required U.S. tax returns (including informational returns)

• Access payment processors like Stripe and PayPal

• Claim tax treaty benefits if applicable

Certain non-business entities—like estates, some trusts, and organizations seeking tax exempt status—also need EINs. This guide focuses primarily on business use cases, especially Wyoming LLCs formed through FormYourCorp.

The IRS expects your business entity to be legally formed at the state level before you apply for an EIN. You cannot get an EIN for a business that doesn’t officially exist yet.

The Typical Formation Sequence

Here’s the standard order of operations:

1. Choose your business name – Verify availability with your state

2. Form the LLC with the state – File Articles of Organization with the Wyoming Secretary of State

3. Designate a registered agent – Required for all Wyoming LLCs

4. Prepare your operating agreement – Documents ownership and management structure

5. Apply for the EIN – Use your official legal name and business address

This sequence matters because the EIN application requires your exact legal entity name and formation details. Changing your entity type after getting an EIN (for example, converting from a sole proprietorship to an LLC or from an LLC to a corporation) can trigger the need for a new EIN.

What to Have Ready

Before starting the EIN application, gather:

• Legal business name (exactly as filed with the state)

• Principal business address (your business location for IRS correspondence)

• Formation date

• Responsible party details (name and taxpayer ID)

• Expected number of employees (can be zero)

• Reason for applying (e.g., “started a new business”)

FormYourCorp handles this entire sequencing for clients. The workflow includes Wyoming LLC formation, registered agent service, operating agreement preparation, and EIN application—all coordinated to ensure accuracy and speed.

The IRS requires every EIN application to identify a “responsible party.” This is the individual who ultimately owns or controls the entity and has authority over its funds and assets.

For most small businesses and Wyoming LLCs, the responsible party is the founder, managing member, or majority owner. The IRS uses this information to link the business to a real person for accountability purposes.

The IRS does not accept “nominees” or purely third-party stand-ins as the responsible party. Attempting this can create compliance issues and trigger IRS scrutiny.

Required Information for the EIN Application

There are several IRS-approved methods to apply for an EIN—online, fax, mail, and phone. The best route depends on whether you have an SSN or ITIN and where you’re based.

Online Application (Fastest for U.S. Residents)

The IRS website offers an online application available to responsible parties with a valid SSN or ITIN. The principal business must be located in the U.S. or its territories.

Benefits of applying online:

• You can get an EIN immediately upon completion

• Available Monday through Friday, 7 a.m. to 10 p.m. Eastern Time

• The application takes approximately 15 minutes

• You typically receive your EIN confirmation ein immediately

Non-Online Options (Fax and Mail)

For those who cannot apply online, Form SS-4 is the official EIN application. You can submit it via:

Fax: Processing typically takes around 4 business days. You’ll receive your EIN by return fax if you include a fax number.

Mail: Processing takes approximately 4 weeks, though delays are common. The IRS mails your EIN confirmation to the address on the application.

International Phone Application

International applicants can call the IRS at 267-941-1099 during weekday hours (6 a.m. to 11 p.m. Eastern Time). This method requires:

• English fluency

• Exact answers from a completed Form SS-4

• Patience (hold times can be significant)

• Calling during U.S. business hours regardless of your time zone

The IRS limits entities to one new EIN per day regardless of method. This prevents bulk or automated applications.

How FormYourCorp Simplifies This

FormYourCorp takes care of EIN acquisition for Wyoming LLC clients, including non-U.S. founders without SSNs. The service includes:

• Preparing and reviewing Form SS-4

• Submitting to the IRS via the appropriate method

• Managing follow-up and responding to IRS inquiries

• Delivering the EIN confirmation to your digital dashboard

Non-U.S. founders often face extra complexity obtaining an EIN because they may lack an SSN or ITIN and cannot use the IRS online system. The process requires more steps and longer timelines, but it’s absolutely achievable.

Foreign-owned Wyoming LLCs can and should get an EIN to:

• Open U.S. bank accounts (Mercury, Relay, Wise, and traditional banks)

• Use payment processors like Stripe and PayPal

• File any required U.S. tax returns

• Establish credibility with U.S. clients and vendors

• Potentially claim tax treaty benefits

The Application Process for Non-Residents

Non-U.S. founders typically apply by:

1. Completing Form SS-4 with specific fields indicating foreign ownership

2. Leaving the SSN/ITIN field blank or indicating “foreign” where appropriate

3. Submitting via fax or mail to the IRS

4. Alternatively, calling the IRS international phone line

Incorrect completion of Form SS-4—especially for foreign owners—can lead to rejections or weeks of delay. Common mistakes include:

• Using incorrect entity type designations

• Providing addresses in wrong format

• Failing to indicate foreign ownership properly

• Incomplete responsible party information

How FormYourCorp Supports Non-Residents

FormYourCorp specializes in this exact scenario:

• Preparing compliant SS-4 forms tailored to foreign ownership

• Handling time zone challenges with IRS communication

• Following up on applications and resolving issues

• Aligning EIN details with Wyoming LLC formation and banking strategy

This expertise is especially valuable when tax authorities require precise documentation and when you’re trying to unlock U.S. banking from abroad.

Once the IRS issues your EIN, you can typically use it ein immediately for most routine business needs. Even while backend IRS systems fully update, your EIN is valid and usable.

Immediate Uses After Issuance

• Opening a U.S. business bank account

• Applying for merchant accounts (Stripe, PayPal, Square)

• Submitting W-9 forms to clients who need to issue 1099s

• Setting up bookkeeping or payroll systems

• Establishing accounts with vendors and suppliers

• Applying for business licenses that require a federal tax ID

What May Require Additional Time

Some IRS systems take up to about two weeks to fully propagate your new EIN. You may experience delays with:

• Electronic payroll tax filings

• State tax id registrations that verify against IRS databases

• TIN matching services used by some financial institutions

• E-filing certain tax returns

Storing Your EIN Documentation

The IRS issues an official confirmation notice (Form CP 575) that serves as your proof of EIN assignment. Best practices:

• Store the original in a secure location

• Keep digital copies for bank and compliance purposes

• Have it ready when opening accounts or signing contracts

• Never share it in unsecured communications

FormYourCorp uploads EIN documentation directly to each client’s digital dashboard, making it easy to share with banks, payment providers, and accountants.

EINs are permanent identifiers that never expire and are not recycled. Once assigned to your entity, that number exists in IRS records forever. However, issues can arise if documents are lost, multiple EINs are accidentally obtained, or incorrect information was used during application.

If You Lose Your EIN Confirmation

Don’t panic. You can typically find your EIN on:

• Prior tax returns (federal tax return, employment tax return)

• Bank account opening documents

• State tax registrations

• Contracts with clients or vendors who requested a W-9

• Previous correspondence from the IRS

As a last resort, you can contact the IRS Business & Specialty Tax Line to retrieve your EIN after identity verification. Only authorized individuals (like the responsible party) can request this information.

Multiple EINs for the Same Entity

Each entity should generally have only one active EIN. Having multiple EINs for the same Wyoming LLC can:

• Cause confusion in IRS records

• Delay processing of tax documents

• Create complications with state tax compliance

• Lead to duplicate filing requirements

If you’ve accidentally obtained multiple EINs, contact the IRS to clarify which number should be used going forward.

Unexpected or Incorrect EINs

If you receive an EIN you didn’t request, or if an EIN appears in your legal name unexpectedly:

• Contact the IRS promptly

• Confirm all data associated with the EIN

• Address potential identity theft or filing issues

• Request documentation of who applied and when

If your EIN application contained errors (wrong business address, minor name variations), you can usually update records with the IRS rather than applying for a new EIN.

While EINs do not expire, certain structural changes to your business may legally require a brand-new EIN. This typically happens when there’s a fundamental change in ownership or entity type.

Situations Requiring a New EIN

Changes That Do NOT Require a New EIN

• Simple business name change

• Moving to a new business location or address

• Changing the responsible party

• Adding or removing DBA/trade names

• Changing your registered agent

• Normal changes in LLC membership (unless it changes entity classification)

When in doubt, review IRS guidance or consult a tax professional before applying for a new EIN. Unnecessary new EINs can complicate tax reporting and create audit issues.

FormYourCorp helps Wyoming LLC owners evaluate whether restructuring, adding members, or changing entity type will trigger the need for a new EIN—and manages the applications when necessary.

The IRS does not “cancel” or reassign EINs. Once assigned, an EIN remains with that entity forever, even if the business later closes.

When a business is dissolved, sold, or otherwise ceases operations, owners must still:

• File final federal tax returns for all applicable years

• File final state tax returns where required

• Pay any remaining taxes owed

• Formally close the company at the state level

• Notify banks and payment processors

The IRS can mark an EIN as inactive once all required filings are complete and the business is fully closed. However, the number itself continues to exist in IRS records and will never be assigned to another business.

Closing a Wyoming LLC Properly

Wyoming LLC owners should coordinate dissolution with:

• The Wyoming Secretary of State (filing Articles of Dissolution)

• The IRS (final returns and EIN closure notification)

• Your registered agent (terminating service)

• Banking and payment platforms (closing accounts)

• Any states where you registered for state tax purposes

Failure to properly close can result in ongoing annual report fees, franchise tax penalties, and compliance issues that follow you for consecutive years.

FormYourCorp assists clients with end-of-life compliance for their Wyoming LLC, including guidance through the steps to properly wind down and avoid future penalties.

Separate from the EIN process, many U.S. companies formed in 2024 and later must file Beneficial Ownership Information (BOI) reports with the Financial Crimes Enforcement Network (FinCEN).

What Is BOI Reporting?

BOI reporting is designed to combat money laundering by requiring businesses to report details about the individuals who ultimately own or control the company. This is distinct from the IRS responsible party requirement, though in small LLCs, the beneficial owner and responsible party are often the same person.

Beneficial owners are defined as individuals who:

• Own at least 25% of the company, OR

• Exercise substantial control over the company

What Must Be Reported?

For each beneficial owner, companies must report:

• Full legal name

• Date of birth

• Residential address

• ID document details (passport, driver’s license, etc.)

Key Points for Wyoming LLC Owners

• Obtaining an EIN does not satisfy BOI obligations

• BOI filing is separate and has its own deadlines

• Failing to file when required can lead to civil and criminal penalties

• Privacy-focused structures must still comply with FinCEN requirements

FormYourCorp educates Wyoming LLC clients about BOI obligations and how they interact with EIN, ownership structures, and privacy-first formation strategies.

“Tax ID number” is a broad term encompassing several different identifiers. Understanding the differences helps founders choose the right taxpayer id number for each purpose.

Comparison of Tax ID Types

Social Security Number (SSN)

An SSN is an individual identifier used for personal taxes and some sole proprietors. Many business owners prefer not to use their SSN publicly because:

• It exposes them to identity theft

• It doesn’t separate business from personal finances

• Banks and vendors often prefer seeing an EIN

• It lacks professional credibility in B2B dealings

Individual Taxpayer Identification Number (ITIN)

An ITIN is a tax id for individuals not eligible for an SSN. It’s used primarily for individual U.S. tax filings, not to identify businesses. Non-resident independent contractor workers often use ITINs, but your Wyoming LLC still needs its own EIN.

State Tax IDs

Some states issue separate state tax id numbers or employer account numbers for:

• State income tax withholding

• State unemployment insurance

• Sales tax collection

These are distinct from your federal EIN. Wyoming has no state income tax, which is one reason it’s popular for LLC formation—but if you operate or have employees in other states, you may need additional state registrations.

For Wyoming LLC owners, the EIN is the core federal identifier. FormYourCorp focuses on securing this first so clients can proceed to banking, Stripe, PayPal, and any necessary state-level registrations.

FormYourCorp is a specialist in Wyoming LLC formation for both U.S. and non-U.S. founders. Integrated EIN acquisition is a core feature of the Blue Premier and Private Client formation packages—it’s not included in the Starter package.

The Step-by-Step Service Flow

1. Client completes online intake – Simple questionnaire captures all needed information

2. FormYourCorp forms the Wyoming LLC – Files with the Wyoming Secretary of State

3. Registered agent service activates – Required for all Wyoming LLCs

4. Operating agreement is prepared – Documents ownership and management

5. EIN application is filed – Aligned with official LLC records and state filing (Blue Premier and Private Client only)

6. EIN confirmation delivered – Uploaded to your digital dashboard (Blue Premier and Private Client only)

Specialized Support for Non-Residents

FormYourCorp is particularly focused on founders without SSNs:

• Preparing compliant SS-4 forms for foreign ownership

• Managing fax and mail processes with proper formatting

• Dealing with time zone challenges for any IRS follow-up

• Ensuring the EIN matches Wyoming LLC formation details exactly

• Supporting banking applications with correct documentation

What’s Included in Formation Packages

• Articles of Organization

• EIN confirmation letter (Blue Premier and Private Client only)

• Operating agreement

• Compliance reminders and deadlines

• Mail scanning and forwarding

Once the EIN is in place, FormYourCorp helps clients with banking resolutions, introductions to U.S. business banks (Mercury, Relay, Wise), and guidance for connecting Stripe and PayPal.

Do I need an EIN if I have a single‑member Wyoming LLC with no employees?

The IRS sometimes allows single-member LLCs to use the owner’s SSN for tax purposes. However, most banks, payment processors, and vendors require an EIN to open accounts, sign contracts, or process payments.

Using an EIN instead of an SSN significantly improves privacy, helps separate business finances from personal accounts, and is recommended for long-term growth. It also makes your business look more professional when clients request W-9 forms.

FormYourCorp includes EIN acquisition in the Blue Premier and Private Client Wyoming LLC packages, so even single-member LLCs can operate like established businesses from day one.

Can a non‑U.S. resident get an EIN without a Social Security Number?

Yes, non-U.S. residents can absolutely obtain an EIN without an SSN. The typical process involves submitting Form SS-4 via fax or mail, or calling the IRS international number at 267-941-1099.

Certain fields on Form SS-4 must be completed in specific ways for foreign owners. Mistakes in these sections can cause weeks or months of delay while the IRS requests corrections.

FormYourCorp specializes in this scenario for Wyoming LLCs and handles the entire EIN process on behalf of non-resident founders, eliminating guesswork and reducing delays.

How long does it take to get an EIN?

U.S.-based responsible parties with an SSN or ITIN using the IRS online system can often file returns preparation and receive their EIN immediately after submitting the application.

Faxed applications are typically processed within several business days. Mailed applications can take a few weeks or longer, especially for foreign-owned entities during busy periods.

FormYourCorp’s timelines depend on IRS workload and the method required for each client’s situation. The company begins EIN processing as soon as the Wyoming LLC is legally formed and keeps clients updated through their dashboard.

Is my EIN the same as a state tax ID or sales tax number?

No. An EIN is a federal identifier issued by the IRS, while state tax IDs or sales tax permit numbers are issued by individual states to manage state-level taxes and tax laws.

Some businesses need both a federal EIN and one or more state IDs, depending on where they operate, have employees, or collect sales tax. Wyoming itself has no state income tax, but if you sell in other states, you may need to register there.

FormYourCorp’s core focus is federal EIN and Wyoming LLC formation. Clients selling in other states should review those states’ requirements with a tax professional or use FormYourCorp’s resources for guidance.

Can I change the name or address on my EIN later?

You generally don’t get a new EIN just because your business name or business address changes. Instead, you update your existing EIN records with the IRS.

Name or address updates are typically made by:

• Mailing a signed authorization letter to the IRS

• Using Form 8822-B for business address changes

• Indicating the name change on your next tax return

Keeping EIN records aligned with current Wyoming LLC filings and banking details reduces confusion and helps prevent delays with IRS correspondence and tax processing. FormYourCorp can assist with these updates when needed.