Where To Find A Tax Id Number: Best Options & Tips

You know, I remember the first time I had to get a Tax ID Number. It felt like I was trying to decipher ancient hieroglyphs. I was starting my little online Etsy shop, dreaming of creative freedom and maybe, just maybe, enough money to buy more yarn. Then, BAM! The tax folks, bless their bureaucratic hearts, were like, "Yeah, you'll need this special number." My initial thought was, "Is this another one of those things they invent to make life harder?"
It’s funny, isn’t it? We spend years learning to count, then suddenly we’re faced with numbers that unlock… well, the privilege of paying taxes. And that little magic number, the Tax ID, is your golden ticket (or sometimes your not-so-golden, but definitely necessary, ticket) to doing business officially.
So, where does a budding entrepreneur, a freelance wizard, or anyone venturing into the glorious world of "making money legally" actually find this elusive Tax ID? Let's break it down, no fancy jargon, just straight talk from your friendly neighborhood internet explorer (that's me!).
The Big Question: What Exactly IS a Tax ID Number, Anyway?
Before we go hunting, let’s get clear on what we’re looking for. A Tax ID Number is essentially your unique identifier for tax purposes. Think of it like a Social Security Number (SSN) but for your business. It’s how the government keeps track of your financial dealings and ensures you’re playing by the rules. Pretty important stuff, right?
There are actually a few different types, and this is where it can get a tad confusing. The most common ones you’ll encounter are the Employer Identification Number (EIN) and the Individual Taxpayer Identification Number (ITIN).
The Superstar: The Employer Identification Number (EIN)
This is the one most people mean when they say "Tax ID Number" for their business. It’s also known as a Federal Tax Identification Number. So, if you’re:
- Starting a corporation or partnership.
- Hiring employees (even just one!).
- Operating a sole proprietorship or single-member LLC and want to keep your personal SSN separate from your business. (Smart move, by the way!)
- Filing for bankruptcy.
- Running a Keogh plan.
- Dealing with certain types of trusts, estates, or non-profits.
Then, my friend, you likely need an EIN. It’s like the business version of your SSN, but instead of identifying you personally to the IRS, it identifies your business entity.
The Other Player: The Individual Taxpayer Identification Number (ITIN)
Now, the ITIN is a bit different. This one is for individuals who need a U.S. taxpayer identification number but don’t have and aren’t eligible to get an SSN. This typically includes:
- Nonresident aliens who need to file U.S. taxes but don't have an SSN.
- Resident aliens who file U.S. taxes but don't have an SSN.
- Dependents or a spouse of a U.S. citizen/resident alien who needs to file a U.S. tax return.
- Dependents or a spouse of a U.S. citizen/resident alien claiming a treaty benefit on a U.S. tax return.
So, if you’re a U.S. citizen or eligible to get an SSN, you won’t need an ITIN. It's specifically for those who fall outside the SSN system but still have U.S. tax obligations. Got it? Good.

So, Where Do I Actually Get This Number?
Alright, let's get down to business. The primary place to get your business Tax ID (the EIN) is directly from the source: the Internal Revenue Service (IRS). And the best part? It's absolutely free!
Yes, you read that right. If anyone is charging you to apply for an EIN, you should probably run the other way. The IRS provides this service free of charge. They’re not trying to nickel and dime you for your business identifier.
Option 1: The Speedy Online Route (Highly Recommended!)
This is, hands down, the fastest and easiest way to get your EIN. It’s like ordering pizza online – convenient and usually delivered pretty quickly!
You can apply for an EIN online directly through the IRS website. Here's what you need to know:
- The Website: Navigate to the official IRS website. You’re looking for the EIN application page. A quick search for "apply for EIN online" on Google will usually get you there, but always double-check you’re on the official IRS.gov domain.
- Eligibility: You must have a valid Taxpayer Identification Number (like an SSN, ITIN, or even an already assigned EIN if you’re applying for a new entity). If you don't have any of these, the online application won't work for you (we'll cover other options in a sec!).
- The Process: The online application is pretty straightforward. You'll be asked questions about your business structure, name, address, and responsible party. Just fill out the form accurately.
- Instant Results: The magic of the online application? You’ll get your EIN immediately upon successful completion! That’s right, you can literally have your number within minutes. How’s that for efficient?
This is the path I always recommend. It’s efficient, it’s free, and you walk away with your number like a boss. No waiting, no mailing, just pure, unadulterated tax ID goodness.
Option 2: The Fax or Mail Route (For the Patient or the Technologically Challenged)
Now, if the online route just isn't your jam, or if you don't meet the eligibility requirements for the online application (e.g., you don't have a U.S. taxpayer ID number), you still have options. You can apply by fax or mail.
- The Form: You'll need to download and complete Form SS-4, Application for Employer Identification Number. You can find this on the IRS website.
- Filling it Out: This form is a bit more detailed and requires careful attention. Make sure all the information is correct and legible. If you're mailing it, please, for the love of all that is organized, use clear handwriting or type it!
- Submitting: You can fax your completed Form SS-4 to the appropriate IRS fax number (which is listed on the form itself or the IRS website) or mail it to the IRS.
- The Wait: This is where the patience comes in. Applying by fax or mail can take several weeks to process. You won't get your EIN instantly like with the online application. So, if you're on a tight deadline, this might not be your best bet. But hey, it works if it needs to!
This is definitely the more old-school method. Think of it as sending a handwritten letter versus an email. Both get the job done, but one feels a little more… leisurely.
Option 3: The Telephone Application (For Those Who Like to Talk)
Believe it or not, you can also apply for an EIN over the phone! This is a great option if you’re not comfortable with online forms or mailing documents, but still want a relatively quick process.
- Who Can Use It: This method is generally for applicants located in the United States and Canada.
- The Number: You’ll need to call the IRS at 1-800-829-4933 during their operating hours.
- The Process: You'll speak directly with an IRS representative who will ask you the questions from Form SS-4 over the phone. Have your information ready!
- Instant EIN: Just like the online application, you'll receive your EIN over the phone upon successful completion of the call. Pretty neat, right?
This option is a nice middle ground. You get to interact with a human (if you prefer that!) and still get your EIN on the spot. It’s a win-win for many.

What About the ITIN? How Do I Get That?
As we discussed, the ITIN is for individuals who don't have an SSN. The process for obtaining an ITIN is different from an EIN. You can't apply for an ITIN online or over the phone.
Applying for an ITIN:
- The Form: You need to complete Form W-7, Application for IRS Individual Taxpayer Identification Number.
- Documentation is Key: Along with Form W-7, you must submit original identification documents or certified copies. This is crucial. You can't just send a photocopy; it needs to be the real deal or a certified copy from the issuing agency. Think passport, national identity card, birth certificate, etc.
- Where to Send It: You have a few options for submitting your application and documents:
- Mail: You can mail your application and documents to the IRS. Be prepared for the wait, as this can take several weeks.
- IRS Taxpayer Assistance Centers (TACs): Some TACs offer ITIN application services. You can check the IRS website to see if there's a TAC near you that provides this service. This can be a good option as they can verify your original documents on the spot.
- Certifying Acceptance Agents (CAAs): These are individuals or entities authorized by the IRS to help taxpayers apply for ITINs. They can review and verify your original documents and forward your application to the IRS. This is often the most convenient option as they handle the verification process for you. You can find a CAA through the IRS website.
The ITIN application process requires more careful attention to documentation. It’s a bit like preparing for a very important job interview – you want all your ducks in a row and your credentials sparkling!
Tips for a Smooth Tax ID Number Application Process
Okay, now that we know where to go, let's talk about making it as painless as possible. Because let's be honest, nobody enjoys dealing with tax paperwork.
Tip 1: Double, Triple, Quadruple Check Your Information!
Seriously. This is probably the most important tip. A single typo in your name, address, or SSN can cause delays or even rejection of your application. If you’re applying online, take your time. If you’re filling out a paper form, use a magnifying glass if you have to. Accuracy is king (or queen)!
Tip 2: Know Your Business Structure
Are you a sole proprietor, an LLC, a corporation? The IRS needs to know this. Make sure you understand how your business is legally structured, as this will dictate which forms you need and what information you’ll provide.
Tip 3: Understand Who the "Responsible Party" Is
For EIN applications, you’ll need to identify the "responsible party." This is the individual who has ultimate authority and control over the entity and its assets. Usually, this is the owner, a principal officer, or a partner. Be clear on who this person is before you start.

Tip 4: Don't Procrastinate!
If you know you need an EIN, apply for it sooner rather than later. Especially if you plan to open a business bank account, hire employees, or file taxes. Waiting until the last minute can lead to unnecessary stress and potential problems.
Tip 5: Keep Your Tax ID Number Secure
Once you have your EIN or ITIN, treat it like you would your SSN. Keep it in a safe place. Don't share it unnecessarily. It's a sensitive piece of information that can be used for fraudulent purposes.
Tip 6: Beware of Scams!
As I mentioned, getting an EIN from the IRS is free. If anyone contacts you claiming to be from the IRS and demanding payment for your EIN or an expedited processing fee, it's almost certainly a scam. Report it! The IRS will never call or email you out of the blue demanding payment for these services.
Tip 7: Bookmark the IRS Website
The IRS website (IRS.gov) is your best friend in this whole process. Bookmark it. Get familiar with it. It's the official source for all forms, instructions, and information. Don't rely on third-party websites that might be outdated or inaccurate.
Final Thoughts on Your Tax ID Journey
So there you have it! Getting a Tax ID Number, whether it's an EIN for your business or an ITIN for your individual tax needs, doesn't have to be a mysterious ordeal. The IRS has made the process relatively accessible, especially with the online EIN application.
Remember, this number isn't just a bureaucratic hurdle; it's a step towards legitimacy and compliance for your financial endeavors. Whether you're selling handcrafted goods on Etsy, freelancing your amazing skills, or running a full-blown company, having the right Tax ID is a foundational piece of the puzzle.
Don't let the acronyms scare you. Take a deep breath, gather your information, and head to the official IRS website. You’ve got this! And who knows, with your newfound official status, you might just have enough extra cash for that extra skein of yarn after all. Happy applying!
