Learn how to ein apply online in under 10 minutes using the IRS EIN Assistant. Get your free federal tax ID instantly with this step by step guide.
By Omer Aydin ·
!Step by step screen guide showing how to ein apply online using the IRS EIN Assistant portal
You can EIN apply online in under 10 minutes using the IRS EIN Assistant. The application is free, runs Monday through Friday from 7 a.m. to 10 p.m. Eastern Time, and issues your nine-digit EIN the moment you submit. Before you open the form, have your SSN or ITIN, your business's legal name, and its physical address ready. The most common reason sessions fail is not a technical error, it is a founder who gets stuck on a field they did not expect. This guide walks through every screen in order so that does not happen to you.
If you are forming a company at the same time as applying for your EIN, the Apply For EIN Online guide covers how the two processes connect and what to do when state registration and federal tax ID applications overlap.
An Employer Identification Number is a nine-digit federal tax ID the IRS assigns to a business entity. It works the way a Social Security Number works for an individual: it identifies your company for federal tax purposes and appears on every return, payment, and official filing your business submits.
You need an EIN to open a business bank account, hire employees, file federal taxes as a business entity, and apply for most business licenses. Many state agencies also ask for it during registration. Even if you have no employees and operate as a sole proprietor, banks and vendors often require an EIN before they will work with you.
The IRS EIN Assistant is the only official, free portal for U.S.-based applicants to obtain an EIN. There is no fee, no intermediary required, and no reason to pay a third party just to submit this form. According to U.S. Stats data from the Census Bureau and FRED, 5,636,988 new business applications were filed in 2025 alone, which means the IRS processes a high volume of EIN requests daily, the online tool exists precisely to handle that load without a wait.
This article covers the mechanics of the EIN application, not tax or legal advice. If you have questions about which entity type to choose or how your EIN connects to state tax obligations, consult a qualified tax professional or attorney.
Gather the following before you open the IRS EIN Assistant. The session expires after 15 minutes of inactivity and cannot be saved, so arriving unprepared means starting over.
Responsible party information:
Business information:
Entity and purpose details:
The IRS defines the responsible party as the individual who has a level of control over, or entitlement to, the funds or assets of the entity. This is not always the same person as a third-party designee. A third-party designee is someone you authorize to receive the EIN on your behalf and answer questions during the application, but the responsible party's personal identification is still required and must be accurate.
If you are applying on behalf of a client or a company you are forming for someone else, clarify this distinction before you start. Entering the wrong person's SSN as the responsible party is a mistake that requires contacting the IRS to correct.
The IRS EIN Assistant walks you through seven screens. Work through them in order and do not leave the browser tab idle for more than 15 minutes or the session will expire.
The entire process from opening the browser to downloading the CP 575 takes most applicants under 10 minutes when they arrive with the information listed in the previous section. The only variable that extends it is hesitation on the entity type or responsible party fields, both of which you can resolve before you start.
The CP 575 is the official IRS confirmation that your EIN has been assigned. It shows your business name, address, EIN, and the entity type the IRS has on file. Banks, state agencies, and investors commonly ask for it when you open accounts or complete registration paperwork.
The critical thing to understand is that the CP 575 is generated once, at the end of your online session. Once you close that browser tab or the session expires, you cannot return to the portal and retrieve the same document. Treat Step 7 as non-negotiable: download the PDF, save it to a secure folder, and print a physical copy before you do anything else.
If you lose the CP 575 after your session ends, you will need to contact the IRS directly to request a replacement. That process takes time and adds friction at exactly the moment you are trying to move fast, opening a bank account, completing state filings, or onboarding a vendor. The simplest fix is to save the letter in at least two places the moment it appears on screen.
One practical habit: name the file with your EIN, business name, and the date. Something like EIN-[your number]-YourCompanyName-2026.pdf is easy to find six months later when someone asks for it.
Online is the fastest method by a significant margin. The IRS EIN Assistant issues your EIN the moment you submit a complete, verified application. You do not wait for a confirmation email or a follow-up call.
The table below shows how the three application methods compare on processing time.
| Method | Processing Time | Notes |
|---|---|---|
| Online (IRS EIN Assistant) | Immediate | Available Mon–Fri, 7 a.m.–10 p.m. ET only |
| Fax (Form SS-4) | 4 business days | EIN faxed back to the number you provide |
| Mail (Form SS-4) | Several weeks | Slowest option; no confirmed timeline |
For nearly every founder, the online method is the right choice. The only reason to use fax or mail is if you fall outside the online tool's eligibility requirements, specifically, if you do not have a U.S. SSN or ITIN.
One planning note: if you are forming multiple entities with the same responsible party, spread those applications across separate days. The IRS enforces a daily cap, so trying to file two in one session will result in a rejection on the second attempt.
For fax and mail methods, see the EIN Online Filing guide.
An EIN is a federal identifier. The IRS issues it, and it applies to your business across all fifty states. A state tax ID is a separate number issued by an individual state's tax authority, and it applies only within that state's tax system.
The two are not interchangeable. Your federal EIN is what you use for federal income tax filings, federal payroll taxes, and most banking relationships. A state tax ID is what your state requires when you collect sales tax, run payroll subject to state withholding, or register for state-specific tax programs. Some states issue a single ID for all state tax purposes; others issue separate numbers for different tax types.
Whether you need a state tax ID depends on your state and your business activities. Not every business collects sales tax, and not every state has an income tax. Requirements vary, and the rules in one state may not apply in another. For a thorough overview of how state-level identifiers work alongside your federal EIN, the company formation resources page covers the relationship between federal and state registration requirements in more detail.
Obtaining an EIN does not complete tax registration. State tax registration is a separate step, handled through each state's own agency, on that state's own timeline.
For a founder forming a company and applying for an EIN at the same time, the two processes create a sequencing problem. You need a formed entity before the IRS will issue an EIN for it, and you need an EIN before you can open a bank account or run payroll. Doing this manually means tracking two parallel workflows, each with its own deadlines and paperwork.
Lovie Formation is an AI-powered company formation service for tech startups. A founder describes their business in a chat interface, and Lovie prepares and submits the state formation documents, assists with the IRS EIN application, and manages ongoing registered agent and compliance requirements. The formation and EIN steps are handled in one workflow rather than two separate processes you coordinate yourself.
This matters most when time is the constraint. If you are trying to open a bank account, sign a vendor contract, or close a funding round, every day the EIN is missing costs you something real. Handling formation and EIN together removes one coordination layer from a period that already has too many moving parts.
Lovie is not a standalone EIN filing tool in the same category as the IRS EIN Assistant. It is a formation service that handles the EIN application as part of a broader company setup workflow.
The IRS EIN Assistant is available only to applicants who have a U.S. SSN or ITIN. If you are a foreign national without either, you cannot use the online portal.
You still have options. The IRS accepts EIN applications from international applicants by fax or mail using Form SS-4. Fax applications take 4 business days to process. Mail takes considerably longer. If you need an EIN quickly and cannot use the online tool, fax is the faster path.
Before you apply, check whether you qualify for an ITIN. An ITIN is a tax processing number the IRS issues to individuals who need a U.S. taxpayer identification number but are not eligible for a Social Security Number. If you obtain an ITIN, you become eligible to use the online EIN application.
The rules around ITIN eligibility, foreign-owned U.S. entities, and international tax obligations are complex. This article does not cover them. If you are a foreign national forming a U.S. company, consult a qualified attorney or tax professional who handles international business formation before you submit any IRS paperwork. Getting the responsible party designation wrong on an international application creates problems that are slow and difficult to fix.
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Many banks, vendors, and state agencies will ask for an EIN even if your single-member LLC has no employees. The IRS does not always require one for a single-member LLC that files taxes on Schedule C, but practical needs, such as opening a business bank account or hiring a contractor, typically make getting one necessary. Apply through the IRS EIN Assistant online; it takes under 10 minutes and costs nothing.
The IRS EIN Assistant is available Monday through Friday, 7 a.m. to 10 p.m. Eastern Time. It is unavailable on weekends and outside those hours. If you try to access it on a Saturday or after 10 p.m. ET on a weekday, the portal will not load. Plan your application for a weekday morning to give yourself time to complete it without rushing against the cutoff.
Yes. The IRS does not charge a fee to apply for an EIN. The IRS EIN Assistant is the official, no-cost portal. You do not need to pay a third-party service to submit this form. If a website is charging you to file an EIN application, you are paying for a service you can complete yourself at no cost through the IRS directly.
Minor errors, such as a misspelled business name or a wrong address, can often be corrected by contacting the IRS Business and Specialty Tax Line. More significant errors, such as an incorrect SSN for the responsible party, require direct IRS contact and take more time to resolve. The best approach is to review every field on the summary screen before you submit. Corrections after the fact add delays at a moment when you typically need the EIN to move forward on something else.
No. The IRS enforces a daily cap on EIN issuance per responsible party. If you are forming two entities with the same responsible party, you must apply on separate days. The limit applies to the responsible party's identification, not to the device or IP address used to apply. Build that into your timeline before you start.
Getting a federal EIN online is free, takes under 10 minutes, and issues your nine-digit number the moment you submit. The online method through the IRS EIN Assistant is faster than any alternative, and the only things that slow it down are arriving unprepared or skipping the CP 575 download at the end.
Before you open the form, gather your SSN or ITIN, your business's legal name exactly as it appears in your formation documents, and the responsible party's information. Complete the seven steps in order, download the CP 575 before you close the browser, and save it in at least two places. If you are forming a company and applying for an EIN at the same time, look at whether a formation service that handles both steps together fits your timeline better than managing them separately.
