How to Get a Tax ID Number in California for a New Business

What “Tax ID Number” Means for a California Business

For a new business in California, “tax ID number” can refer to more than one identifier, depending on what your business does and how it is structured. Most new businesses will need one or more of the following:

• EIN (Employer Identification Number) from the IRS for federal tax administration, payroll, and many banking needs.
• California Employer Payroll Tax Account Number for state payroll withholding and unemployment insurance when you have employees.
• California Seller’s Permit (sales tax permit) if you sell taxable goods or certain taxable services in California.
• Entity ID / Secretary of State file number for corporations, LLCs, and limited partnerships registered with the California Secretary of State.

Many new businesses start with an EIN, then add California registrations (seller’s permit, payroll account) based on hiring plans and whether they make taxable sales.

Quick California Snapshot (Sales Tax, Major Cities, Major Counties)

Step-by-Step: Getting the Right Tax IDs for a New California Business

Step 1: Choose your business structure and legal name

Your structure affects which tax IDs you need and how you file taxes. Common options include sole proprietorship, partnership, LLC, and corporation. If you form an LLC or corporation, you’ll typically register with the California Secretary of State and may receive a state entity number.

Step 2: Apply for an EIN (federal tax ID) if needed

Most businesses benefit from an EIN, and many are required to have one. You generally need an EIN if you:

• Hire employees (now or soon)
• Operate as a partnership or corporation
• Form an LLC with more than one member (or elect corporate taxation)
• Want to keep your SSN off W-9s and certain business documents
• Need to open a business bank account or apply for business credit

Once you have an EIN, keep the IRS confirmation notice with your permanent business records. Banks, payroll providers, and some vendors commonly request it.

Step 3: Register for a California Seller’s Permit if you make taxable sales

If your business sells tangible products (and certain taxable items) in California, you may need a seller’s permit to collect and remit sales tax. This is separate from an EIN and is administered at the state level. Your collection responsibilities can vary based on:

• What you sell (products vs. services)
• Where you sell (in-store, online, marketplaces, events)
• Where your customers receive the product

If you’re comparing how sales tax registration differs across states, see the Nevada State Sales Tax Number page for a helpful contrast in terminology and process.

Step 4: Register for California employer payroll taxes if you hire employees

When you hire employees in California, you typically need a state employer payroll tax account for wage reporting and payroll tax administration. Plan to coordinate your:

• Federal payroll setup (EIN, federal withholding, payroll tax deposits)
• California payroll setup (state employer account, wage reports, state withholding)
• Local requirements (city business licenses and local taxes where applicable)

Step 5: Confirm local licensing and tax registrations

California businesses often need city or county business licenses, and some industries require additional permits. Your local requirements depend on your business address, type of activity, and whether you operate from home, a commercial location, or multiple jurisdictions.

Which Tax ID(s) Do You Need? Common New-Business Scenarios

• Sole proprietor with no employees: Often can use an SSN for federal taxes, but many still obtain an EIN for privacy and banking; seller’s permit if selling taxable goods.
• LLC (single-member): Often obtains an EIN; seller’s permit if taxable sales; payroll account if hiring.
• LLC or corporation hiring employees: EIN + California employer payroll tax account; seller’s permit if making taxable sales.
• Online seller shipping to CA customers: Seller’s permit may be required; rules can vary based on nexus and fulfillment method.

Information You’ll Want Ready Before You Apply

Having complete, consistent details reduces delays and prevents mismatches across agencies and accounts. Prepare:

• Legal business name and any DBA (fictitious business name)
• Business address and mailing address
• Entity type (sole proprietor, LLC, corporation, etc.)
• Responsible party/owner information
• Start date and a brief description of business activities
• Estimated payroll and first pay date (if hiring)
• Expected taxable sales and sales channels (if registering for sales tax)

After You Receive Your Tax IDs: What to Do Next

• Open a business bank account using your EIN and formation documents (if applicable).
• Set up bookkeeping to track sales tax collected, deductible expenses, and payroll records.
• Update vendor forms (like W-9 requests) using your EIN rather than an SSN where appropriate.
• Calendar filing due dates for sales tax returns, payroll reports, and annual statements.
• Keep confirmation notices and registration letters in a secure compliance folder.

If you also do business outside California, reviewing another state’s sales tax registration approach can help you plan multi-state compliance. The North Dakota State Sales Tax overview is a useful example of how requirements and terminology can differ.

FAQ: Getting a Tax ID Number in California for a New Business

Do I need an EIN to start a business in California?

Not always. A sole proprietor with no employees may be able to use an SSN for federal tax filing. Many new businesses still choose to get an EIN for banking, vendor paperwork, and privacy, and it’s required for partnerships, corporations, and most employer payroll setups.

Is a California tax ID the same as an EIN?

No. An EIN is a federal identifier issued by the IRS. California tax IDs can include a seller’s permit number for sales tax and an employer payroll tax account number for state payroll reporting.

How do I know if I need a California Seller’s Permit?

You generally need a seller’s permit if you sell tangible products in California and are required to collect sales tax. This often includes retail sales, online sales shipped to California, and sales at events. Your specific products and sales model determine whether registration is required.

If I form an LLC in California, do I automatically get a tax ID number?

Forming an LLC creates a state-registered entity and typically results in a state entity identification number. It does not automatically create an EIN or a seller’s permit. You obtain those separately based on your tax and operational needs.

Can I use my EIN to open a business bank account in California?

Yes. Most banks accept an EIN as the primary federal tax identifier for business accounts. Depending on your structure, the bank may also require formation documents, operating agreement/bylaws, and proof of registration.

What if I’m starting a California business but I’m not located in California?

You may still need California registrations if you are doing business in California, selling taxable products into California, or have employees working in California. The required accounts depend on your business activities and where your operations and customers are located.

Do independent contractors require a California employer payroll tax account?

Paying independent contractors generally does not require an employer payroll tax account in the same way hiring employees does. However, correct worker classification is critical, and some reporting obligations can still apply depending on the situation.

What information is most likely to cause delays when applying for tax IDs?

Common issues include inconsistent business names across filings, incorrect entity type selection, mismatched addresses, and unclear descriptions of business activities. Align your legal name, DBA, and addresses across all registrations.

Do I need a new EIN if I change my business name or address?

Often you can update a business name or address without getting a new EIN, but certain structural changes can require a new EIN. The need for a new number depends on what changed (ownership, entity type, and tax classification changes are the most significant).

What happens if I start selling products before registering for a seller’s permit?

You can create compliance problems if you should have been collecting sales tax but weren’t registered. If you plan to sell taxable goods, it’s best to register before making sales so you can properly collect and track sales tax from the start.

How many tax ID numbers might a new California business end up with?

Many businesses have at least two identifiers: an EIN for federal taxes and a California seller’s permit or payroll account number (or both) depending on whether they sell taxable goods and hire employees. Registered entities may also have a state entity ID number.

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