How to Get a Tax ID Number for a New Business (Identification, Not Idaho)

What a “Tax ID Number” Means for a New Business

In the United States, “tax ID number” is a general phrase that can refer to several different identifiers used by federal and state agencies. For most new businesses, the term commonly means an Employer Identification Number (EIN) issued by the IRS. An EIN is used to identify a business for federal tax administration and is frequently required to open business bank accounts, run payroll, and file certain federal tax returns.

This article focuses on the business identification number you need to operate and stay compliant—not the state of Idaho.

Common types of tax identification numbers

• EIN (Employer Identification Number): Federal business tax ID from the IRS.
• SSN/ITIN: Individual taxpayer IDs; sometimes used by sole proprietors without employees, depending on the situation.
• State tax IDs: State-issued IDs for sales tax, withholding, and other state programs.

Do You Need an EIN or Can You Use an SSN?

Many new business owners can apply for an EIN even if they are a one-person business. In some cases, a sole proprietor may be able to use an SSN for certain federal tax filings, but an EIN is often the practical choice for business operations and separation of personal vs. business administration.

Situations where an EIN is typically required

• You have employees or plan to hire employees.
• You operate as a corporation or partnership.
• You file certain federal tax returns (such as payroll tax filings).
• You want to open a business bank account or apply for business credit (many financial institutions request an EIN).
• You purchase an existing business or create a new entity that requires a new EIN.

Information to Gather Before You Apply

Having the right details ready will make the EIN application process faster and reduce errors.

Typical details requested for a new EIN

• Legal name of the business (as registered with your state, if applicable)
• Trade name/DBA (if different from legal name)
• Business address and mailing address
• Entity type (sole proprietor, LLC, corporation, partnership, etc.)
• Responsible party name and taxpayer ID (often SSN/ITIN/EIN, depending on circumstances)
• Reason for applying (new business, hiring employees, banking purposes, etc.)
• Date business started or acquired
• Industry/activity and primary business purpose
• Estimated number of employees (if any) and first wage date (if hiring)

How to Get an EIN (Tax ID Number) for a New Business

Applying for an EIN is a structured process. The goal is to submit accurate information that matches your business formation documents and your planned tax setup.

Step-by-step: EIN application workflow

1. Confirm your legal business structure (for example, LLC vs. corporation) and ensure your state formation is complete if required for your plan.
2. Decide who the responsible party is and ensure their information is correct and consistent across filings.
3. Complete the EIN application with the business’s legal name, address, entity type, and reason for applying.
4. Review before submission to avoid mismatches (name formatting, address errors, incorrect entity selection).
5. Save your EIN confirmation and store it with your business records for banking, payroll, and tax filings.

Processing and timing considerations

Many new business owners need an EIN quickly to open accounts or start payroll. If you want a clearer picture of what happens after submission and typical turnaround expectations, review processing EIN form requests.

After You Receive Your Tax ID Number: Next Compliance Steps

Getting a federal tax ID is often just one part of your startup compliance checklist. Depending on where you operate and what you sell, you may also need state tax registrations.

Common follow-up registrations

• State withholding account (if you have employees)
• Sales and use tax permit (if you sell taxable goods or services)
• Local business licenses (city/county requirements)
• Industry permits (regulated activities such as food, alcohol, transportation, or professional services)

If you operate in a state that requires sales tax registration, you may need a separate state number. For example, businesses with Maryland tax obligations often start with a Maryland sales tax number registration workflow.

Common Mistakes to Avoid When Getting a Tax ID Number

• Applying before your entity details are finalized (name changes and entity conversions can create administrative cleanup later).
• Selecting the wrong entity type (especially for single-member LLCs vs. partnerships).
• Using inconsistent business names across bank accounts, state filings, and EIN records.
• Mixing personal and business addresses without a clear plan for mail handling and recordkeeping.
• Assuming an EIN replaces state tax accounts (state sales tax and withholding IDs are separate).

FAQ: Getting a Tax ID Number for a New Business

1) Is a “tax ID number” the same as an EIN?

Often, yes. In everyday business use, “tax ID number” usually refers to an EIN. However, the phrase can also refer to state tax IDs or an individual SSN/ITIN, depending on context.

2) Can I get an EIN if I don’t have employees yet?

Yes. Many new businesses obtain an EIN for banking, vendor onboarding, or to prepare for payroll later—even before hiring.

3) Do I need a new EIN if I form an LLC after starting as a sole proprietor?

It depends on how the change is structured. Some business changes require a new EIN, while others do not. The key factor is whether the “tax entity” has changed in a way that requires a new federal identifier.

4) Can I use my EIN to open a business bank account?

In many cases, yes. Banks commonly request an EIN along with formation documents and ownership information to open business checking accounts and merchant services.

5) What is the “responsible party” on an EIN application?

The responsible party is the individual who controls, manages, or directs the business and its funds and assets. Their identifying information is used to connect the EIN to the person accountable for the entity.

6) If my business name changes, do I need a new EIN?

Not always. A name change may only require updating business records and notifying the appropriate agencies, while the EIN stays the same. Entity changes (like reorganizations) are more likely to trigger a new EIN requirement.

7) Is an EIN the same thing as a state sales tax number?

No. An EIN is a federal identifier. A state sales tax number (or sales tax permit) is issued by a state revenue agency for collecting and remitting sales tax.

8) Can I have more than one EIN for the same business?

Typically, a single business entity uses one EIN. Separate legal entities (for example, a second LLC) usually require separate EINs.

9) What should I do with my EIN confirmation after I receive it?

Store it with your formation documents and keep it accessible for banking, payroll setup, vendor forms (like W-9 requests), and tax filings.

10) Do online sellers need an EIN?

Many online sellers get an EIN for payment processing, wholesale accounts, and tax administration. Whether it is strictly required depends on your entity type, whether you have employees, and what registrations your business needs.

More Topics to Explore

• Processing EIN Form
• Maryland Sales Tax Number
• Maine Sales Tax Number
• EIN application processing timeline and next steps
• Registering for Maryland sales and use tax