adminYou do not need to pay an application company hundreds of dollars simply to obtain a federal business tax number. The IRS issues an Employer Identification Number free of charge. The real challenge is choosing the correct application method, entering the right business details, and understanding what the number does after it arrives.
For a publisher, marketing agency, ecommerce business, or software company, incorrect tax records can create avoidable problems when setting up banking, payroll, or business accounts. A rushed application can also produce duplicate numbers or connect an entity to the wrong responsible party. Those mistakes are harder to unwind than spending time on preparation.
This guide explains how to apply in 2026, including the online process, Form SS-4, and options for eligible international applicants. It also covers non-US owners without an SSN or ITIN, confirmation documents, common errors, and important follow-up checks. You will finish with a practical application framework and official IRS links, so you can decide whether to apply directly or obtain professional help for a more complex business structure.
What is a US Employer Identification Number
A US Employer Identification Number is a nine-digit federal tax identifier issued by the Internal Revenue Service. It is commonly written in the format 12-3456789 and is also called an EIN or federal employer tax identification number. [1]
Despite the word “employer,” the number is used by entities that may have no employees. It identifies business and other entity tax accounts, while an SSN or ITIN identifies an individual for the relevant tax purposes.
For business owners, the key distinction is between identification and permission. An EIN identifies an account; it does not create a company, grant immigration status, prove tax exemption, or guarantee that a financial institution will accept your business.
Treat it as one component of your operating records. Your formation documents, ownership information, tax classification, licences, and banking evidence must still tell a consistent story.
Who needs an EIN for a business
An EIN is relevant to a range of business arrangements, including employers and entities with specific tax reporting obligations. IRS guidance also recognises requests for banking or state tax purposes where a federal tax requirement does not otherwise apply. [2]
A solo consultant should not assume that every freelancer must form an LLC and obtain an EIN. Equally, a company should not assume that having no staff removes its filing obligations.
Start with three questions:
- What legal arrangement exists? Identify the actual individual, partnership, company, trust, or other entity.
- What activity or filing creates the need? Consider employment, entity reporting, banking, and state requirements.
- Has the same applicant already received a number? Check existing records before submitting another application.
For a digital publisher, distinguish the website brand from the person or entity operating it. Several websites can belong to one business, while different companies within a group may have separate records.
For a marketing agency, distinguish client money and client accounts from your own business identity. A client’s EIN should not be substituted for the agency’s identifier merely because the agency manages campaigns on its behalf.
EIN vs SSN vs ITIN vs state tax ID
These identifiers serve different purposes. Choosing the right one helps prevent mismatches in financial and tax records.
| Identifier | What it generally identifies | Important limitation |
| EIN | Business or other entity tax account | Does not replace an owner’s personal identifier |
| SSN | Individual in the Social Security and tax systems | Is not an entity’s EIN |
| ITIN | Individual requiring a US taxpayer identifier who meets the relevant rules | Does not grant work permission |
| State tax ID | Account within a state tax system | Does not replace the federal identifier |
| Company registration number | Entity record under the relevant registration system | Is not automatically an IRS tax number |
When a bank or platform requests a “tax ID,” ask which taxpayer and jurisdiction the field concerns. Do not select a number based only on its length or because a website accepts the entry.
An Employer Identification Number also does not determine your tax residence. A US entity, an overseas owner, and business activity performed in another country can create separate questions that need individual assessment.
Apply for an EIN online or use Form SS-4
The fastest suitable route depends on eligibility, not convenience alone. The IRS currently offers online, fax, mail, and qualifying international telephone applications. [2–3]
| Method | Suitable starting point | Published timing or practical expectation |
| Online | Applicants meeting the IRS online tool’s eligibility rules | Immediate issuance if approved |
| Fax | Applicants using the appropriate SS-4 fax route | About four business days when a return fax number is provided |
| Applicants submitting a signed paper SS-4 | Approximately four weeks, with delays possible | |
| International telephone | Applicants meeting the international calling criteria | Assignment may be handled during the call; no guaranteed waiting time |
These are service descriptions rather than promises. Plan for document preparation, transmission problems, postal delivery, and IRS workload as well as processing itself.
Apply using one method for the entity. Sending the same request through several channels to accelerate it can create duplicate-account problems. The IRS also limits issuance to one EIN per responsible party per day. [3]
EIN application requirements and preparation checklist
Prepare your information before starting a form or online session. The goal is to establish a clear record of who is applying, who controls the applicant, and why the number is required.
Collect:
- Formation or registration records, where relevant.
- The applicant’s legal name and any different trading name.
- Accurate mailing and physical location details.
- The responsible party’s identity and relevant taxpayer information.
- The entity structure and intended tax treatment.
- The reason for applying and relevant business start information.
- Details needed for any employment-related questions.
- Existing EIN correspondence, if the business has applied previously.
If you are forming a legal entity, complete the necessary formation step before applying for its number. Your application should describe an existing applicant rather than a proposed business name that has not yet been established. [2]
For a US LLC, review the approved name carefully. A marketing brand, domain name, and legal company name can differ; the application needs the correct entity identity.
IRS responsible party rules
The responsible party is generally the individual who ultimately owns or controls the entity and directs its funds or assets. Except for government entities, the IRS requires a natural person rather than another company in this role. [4]
A formation service, registered agent, or adviser is not automatically your responsible party. A nominee with only limited formation authority should not be listed instead of the real controlling person.
An authorised third-party designee is a separate role. Where properly authorised, that person can help obtain the number without becoming the person who actually controls the entity. Check the authority being granted and retain a signed copy.
If someone offers to use their own identity merely to get you through the online tool, pause. Your Employer Identification Number application should reflect the real ownership and control arrangements, not a convenient substitute.
How to apply for an EIN online step by step
Step 1 Confirm eligibility for the IRS online tool
The current online page requires a domestic organisation formed in the US or its territories, a principal place of business there, an appropriate responsible party or authorised representative, and the responsible party’s SSN or ITIN. [5]
Do not assume that incorporating in a US state is enough. If your actual business location and responsible-party circumstances do not meet the tool’s rules, use an appropriate alternative.
Step 2 Open the application through IRS.gov
Navigate from the official IRS application page rather than a search advertisement. A private company may lawfully charge for assistance, but that charge is its service fee, not an IRS fee.
Check the web address before entering personal details. Avoid submitting sensitive identity information to a site merely because its design looks official.
Step 3 Answer using your prepared records
Work through the questions using the correct entity and responsible-party information. If a classification question is unclear, resolve it before submitting rather than selecting whatever allows you to continue.
The online session cannot be saved for later and expires after 15 minutes of inactivity. Keep the required information ready so you can complete the process in one sitting. [5]
Step 4 Review and retain the result
If approved, the tool issues the EIN immediately. Save or print the confirmation before closing the session, and place it with your permanent business records. [5]
Record the exact legal name used. Future verification is easier when your accountant, bank, and authorised staff use the same approved identity details.
How to complete Form SS-4 without guessing
Form SS-4 is the paper application for an EIN. Use the current IRS instructions alongside it; this overview highlights decisions to prepare rather than prescribing identical answers for every applicant.
| Form area | Preparation question |
| Applicant identity | Which legal person or entity needs the number? |
| Trading name | Is the public brand different from the applicant? |
| Addresses | Where is mail received and where is the business located? |
| Responsible party | Who genuinely controls the entity and its assets? |
| LLC and entity details | What structure exists and what tax treatment applies? |
| Reason for applying | What actual business or reporting need prompted the request? |
| Activity and employment information | What does the business do and what staffing is expected? |
| Prior application and signature | Has a number already been requested and is the signer authorised? |
The official instructions distinguish a mailing address from a physical address and contain specific rules for different entity types. They also make clear that the entity-type entry is not itself a tax classification election. [3]
Do not copy an example LLC application without checking ownership and tax treatment. A single-owner entity, a multi-owner entity, and an entity making a corporate election may require different handling.
Describe your actual business activity. For example, an agency providing campaign management should not describe itself as a bank or investment company simply because it manages large advertising budgets.
EIN for non-US residents and international businesses
A person can be outside the US and still have a legitimate business reason to request an EIN. However, ownership nationality, place of formation, principal business location, and application eligibility are distinct questions.
For an EIN for non-US residents, first identify the applicant. A UK limited company, a US LLC owned by a UK resident, and an individual sole trader are not interchangeable.
A registered-agent address should not be treated as proof that your principal business activity occurs in the US. Use accurate facts and clarify uncertain cases with the IRS rather than adapting your address to fit an online screen.
EIN without SSN or ITIN
The current SS-4 instructions allow “foreign” or “N/A” on line 7b when the responsible party does not have, and is ineligible to obtain, an SSN or ITIN. An entry is required. [3]
This is a paper-form instruction, not a way to bypass the online tool’s SSN or ITIN requirement. If your situation does not clearly meet that condition, obtain advice instead of assuming that every foreign owner should enter the same answer.
Do not buy, borrow, or invent an SSN. A paid helper’s personal number should not replace the true responsible party’s details.
International EIN telephone application
The IRS lists +1 267-941-1099 for eligible international applications, Monday through Friday, 6 a.m. to 11 p.m. US Eastern Time. It is not toll-free. The caller must be authorised and able to answer the SS-4 questions. [6]
Complete the form in advance and keep it available during the call. Follow any instructions from the representative about submitting signed material, and retain a clear record of the outcome.
Check the current IRS eligibility wording before calling. Being temporarily abroad does not automatically make a domestic application eligible for international telephone issuance.
Applying by fax or mail
Use the destination appropriate to your circumstances. The IRS lists these principal routes; confirm the current instructions immediately before transmitting sensitive information. [2]
| Route | Current destination |
| Domestic SS-4 fax route | 855-641-6935 |
| International route faxed from within the US | 855-215-1627 |
| International route faxed from outside the US | +1 304-707-9471 |
| Domestic mail | Internal Revenue Service, Attn: EIN Operation, Cincinnati, OH 45999 |
| International mail | Internal Revenue Service, Attn: EIN International Operation, Cincinnati, OH 45999 |
Include a usable return fax number if you want the IRS to fax the result. Keep the signed application and transmission confirmation together.
For mail, allow for international delivery where relevant. Do not interpret the approximate IRS processing period as including every stage of overseas postal transit.
EIN processing time and when you can use the number
Your Employer Identification Number may be assigned before every electronic system recognises it. The IRS distinguishes immediate business uses from certain electronic tax functions that can take up to two weeks to become available. [2]
If a system rejects a newly issued number, first check the legal name and digits against the confirmation. Ask whether the system needs time to update before concluding that you need another application.
Keep business launch dates realistic. Banking, payment processing, payroll setup, and customer due diligence can have separate review periods that an EIN does not remove.
EIN confirmation letter and lost number recovery
Store your assignment evidence securely. It can be needed when financial institutions, business service providers, or tax professionals ask you to verify the entity’s identifier.
The IRS explains that the original CP575A–J assignment notice cannot be recreated. Eligible Business Tax Account users can access a digital CP575 verification notice, which substitutes for that original series and Letter 147C. [7]
If you lose your records, begin with saved notices, filed returns, or records already held by authorised business advisers. Where necessary, use the IRS verification or recovery process rather than applying again.
For eligible enquiries, the IRS business line can provide Letter 147C after appropriate verification. Confirm the current contact options on IRS.gov, especially when calling from overseas. [2]
EIN for LLC owners and ongoing tax compliance
Receiving an EIN does not settle the tax obligations of an LLC. Entity classification, owner residence, income sources, employees, and transactions can affect what must be filed.
Foreign-owned US disregarded entities deserve particular attention. Where the reporting rules apply, a Form 5472 filing with a pro forma Form 1120 can be required even though the entity is disregarded for income tax purposes. [8–9]
The Form 5472 instructions describe a $25,000 penalty for failing to file when required in the prescribed manner, with further consequences for continued failure. This is a specific information-reporting risk, not a routine fee for obtaining a number. [8]
Arrange a compliance review when establishing the business rather than waiting until revenue arrives. Record owner funding, withdrawals, and other related-party dealings so an adviser can assess the actual reporting position.
How publishers and marketing agencies should use their EIN
For businesses using Google Ad Manager, AdSense, affiliate networks, or advertising platforms, keep the payee’s identity aligned with the actual contracting business. An EIN is not permission to enter false country, ownership, or tax-residency information.
Choose tax documentation based on the taxpayer and the payment arrangement. Do not assume that obtaining a US identifier automatically makes every overseas business a US person for tax-form purposes.
Advertising technology choices remain separate. Open Bidding, Prebid.js header bidding, Preferred Deals, and private marketplace agreements concern monetisation and commercial arrangements; none creates EIN eligibility or changes the IRS application process.
Similarly, a federal tax number does not guarantee advertiser access, a payment account, or higher eCPM. Evaluate those services on their own terms and use consistent business records across the accounts you operate.
Worked example of an international agency application
This is a hypothetical planning example, not a real client case or guaranteed IRS outcome. Imagine a UK-based agency owner who has formed a US single-member LLC and wants to obtain its federal identifier.
The owner manages the business from the UK, has no SSN or ITIN, and cannot assume eligibility for the IRS online tool. The first task is to establish the correct application route and responsible-party entry using the actual facts.
| Checkpoint | Hypothetical action | Practical benefit |
| Entity identity | Use the approved LLC legal name | Reduces name mismatches |
| Business location | Record the genuine operating location | Supports route selection |
| Responsible party | Identify the controlling individual | Avoids a nominee substitution |
| Personal identifier | Check the foreign/N/A instruction carefully | Avoids unsupported entries |
| Submission | Use one appropriate method | Reduces duplicate requests |
| Follow-up | Review confirmation and reporting obligations | Separates assignment from compliance |
Suppose a service provider quotes $250 purely for application assistance. Applying directly has a $0 IRS application fee, so the difference is $250 in optional service cost—not a difference in government charges or approval standards.
The owner might still pay a professional to assess tax classification and foreign-owner reporting. That is a different service from merely transmitting SS-4, and its scope should be stated clearly.
The lesson is to separate three decisions: whether an EIN is needed, how to request it, and how to meet ongoing obligations. One purchase should not be assumed to solve all three.
Common EIN application mistakes
Applying before identifying the applicant. Establish whether the number belongs to an individual business owner or a separate entity before submitting.
Using a brand instead of the legal identity. Keep trading names separate where appropriate and check the records used by banks and tax advisers.
Listing a nominee as the responsible party. A convenient helper is not necessarily the person controlling the entity.
Submitting duplicates after a delay. Check the original request and published processing guidance before starting another application.
Assuming no revenue means no filings. Review entity-specific reporting obligations rather than treating income as the only trigger.
Buying promises of financial access. No application company can make every bank, lender, or payment provider approve your business merely by obtaining an identifier.
When to update records or request a new EIN
A change of business name or address does not normally require a new number. Changes in ownership or structure can, but the answer depends on the entity and transaction. Consult the IRS entity-specific guidance. [10]
Use the correct update process instead of creating a duplicate account. The IRS directs businesses to Form 8822-B for address or responsible-party changes, and responsible-party changes must be reported within 60 days. [4]
Keep a record of what changed, when it took effect, and how it was reported. This makes future banking and tax checks easier when historical documents show older details.
Official EIN tools and resources for 2026
Use the IRS application page to check online eligibility and begin an eligible application. Use Form SS-4 and its instructions for other routes and entity-specific questions.
Use the IRS responsible-party guidance, EIN confirmation information, and new EIN guidance when maintaining existing records. Where foreign ownership is involved, include the relevant information-return instructions in your compliance review.
Professional assistance is most useful when it resolves a real uncertainty: classification, ownership structure, reporting, or a complex application history. Request an itemised scope so you understand whether the provider is supplying advice, preparation, submission, or ongoing support.
Frequently asked questions
Is an Employer Identification Number free?
Yes. The IRS does not charge an application fee. A private provider may charge for its own assistance, but that payment is separate from the government service. [5]
Can a non-US resident obtain an EIN?
Potentially, yes. Eligibility and method depend on the applicant and business facts. International routes exist, but foreign ownership alone does not determine which route applies.
Can I get an EIN without an SSN or ITIN?
Some applicants can use the SS-4 provisions for a foreign responsible party without those identifiers. The exact instruction must fit the circumstances; the online tool still has its own eligibility requirements. [3,5]
Do I need an LLC before applying?
Not every applicant is an LLC. If you are requesting a number for a newly created legal entity, form that entity first. If you are applying as an individual business owner, assess the requirements for that arrangement.
Does having an EIN guarantee a US bank account?
No. Banks make their own decisions and may require formation, ownership, identity, address, and other evidence. Ask the institution about its requirements before relying on a particular account.
Do I need a separate EIN for every website?
Not simply because each website has a different name. Identify the legal operator and relevant tax account. Separate entities or structural changes may require different treatment.
What if I lose my EIN confirmation letter?
Use existing records or the official IRS confirmation process. Eligible users can obtain a digital verification notice through Business Tax Account, and Letter 147C is another verification option. Do not apply again solely because a letter is missing. [7]
Your next step toward a correct EIN application
Getting an Employer Identification Number starts with accurate business facts. Confirm the applicant, responsible party, existing records, and appropriate application method before entering information or paying a provider.
Use the official IRS resources below, save your confirmation securely, and create a separate checklist for tax reporting and business onboarding. A correctly issued number is a useful foundation; consistent records and timely follow-up make it useful in practice.
