How to Get an EIN in Massachusetts

How to Get an EIN in Massachusetts

How to Get an EIN in Massachusetts

An Employer Identification Number (EIN) is a nine-digit federal tax identification number issued by the Internal Revenue Service (IRS). Also called a Tax ID Number or Federal Tax ID, an EIN identifies your Massachusetts business to the IRS for employment tax, excise tax, and other business purposes. It's free to obtain and is distinct from your Social Security number or state tax IDs.

Whether you are forming an LLC, corporation, partnership, or sole proprietorship in Massachusetts, understanding when and how to get an EIN is an essential first step. This guide walks through the entire process, from determining eligibility to receiving your EIN and registering for state taxes.

Do You Need an EIN in Massachusetts?

Not every Massachusetts business needs an EIN, but most do. You are required to obtain an EIN if your business falls into any of these categories:

  • Any business structure other than a sole proprietorship (LLC, corporation, partnership, S-corp)
  • A sole proprietor or partnership that has at least one employee
  • A business that will withhold income tax or Social Security tax from employee wages
  • A business required to file employment tax returns with the IRS
  • A nonprofit organization, trust, estate, or tax-exempt organization
  • A business filing bankruptcy

A sole proprietor with no employees and no corporate structure may operate under their Social Security number, but obtaining an EIN is still recommended for privacy and professional reasons. Many Massachusetts business owners get an EIN even when not strictly required, both for liability protection and cleaner record-keeping with the IRS and Massachusetts Department of Revenue.

This is informational content only and should not be interpreted as legal or tax advice. For guidance specific to your business structure and tax situation, consult a qualified CPA or tax attorney.

What You Need to Have Ready: Documents and Information

Before applying for an EIN, gather the following information. The IRS application form requires accurate details about your business, and having these documents on hand will speed up the process:

  • Your Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN) if you are a non-U.S. citizen
  • Your Massachusetts business name, exactly as registered with the Secretary of the Commonwealth or as you conduct business
  • Your business address in Massachusetts (the principal place of business)
  • A mailing address (if different from business address)
  • The date you expect to start your business, or the date you started if already operating
  • Your business structure (sole proprietorship, partnership, LLC, S-corp, C-corp, nonprofit, trust, estate)
  • A brief description of your business activities or industry
  • The number of employees you expect to have, or do have if already operating
  • Your Certificate of Organization (if an LLC) or Articles of Organization (if a corporation), or partnership agreement, showing the formation date and registered agent

If you are applying on behalf of someone else's business, you will also need to provide a completed Form 2848 (Power of Attorney) or have the primary owner authorize you to file.

The EIN Application Process: Step-by-Step

The IRS offers three methods to apply for an EIN. Each has different processing times and eligibility rules. Below is the step-by-step process for each option.

Option 1: Apply Online (Fastest Method)

The IRS online application portal is the fastest and most straightforward way to get an EIN. You can receive your number instantly.

  1. Go to the IRS EIN Assistance page. Visit https://www.irs.gov/ein and select "Apply for an EIN Online." You will be routed to the ONLINEEIN system.
  2. Confirm eligibility. The IRS will ask you to confirm that your business entity is in the United States, that you have a valid U.S. taxpayer ID (SSN or ITIN), and that you are authorized to represent the business applying. Foreign-owned businesses and entities outside the U.S. cannot use the online portal.
  3. Select your business structure. Choose from sole proprietor, partnership, LLC, C-corporation, S-corporation, nonprofit, trust, estate, or government entity. The form adapts based on your selection.
  4. Enter your Massachusetts business details. Provide your business legal name (exactly as registered with the Massachusetts Secretary of the Commonwealth), your principal business address in Massachusetts, and your mailing address if different. Use your Massachusetts street address: the IRS does not accept P.O. boxes for the principal business location, though you may use one as a mailing address.
  5. Provide your personal information. Enter the name, date of birth, and SSN/ITIN of the business owner, member, or responsible party (the person authorized to represent the business). For LLCs and corporations, this is typically the owner or member with managing authority.
  6. Describe your business activities. Enter a brief description of what your business does (e.g., "Software consulting," "Retail boutique," "Plumbing contractor"). Be as specific as reasonably possible without lengthy detail.
  7. Enter employee count and start date. Specify whether you have employees, how many you employ or expect to employ, and when you began or expect to begin business activities. The IRS uses this to determine which employment tax returns you must file.
  8. Review and confirm. The system displays a summary of your information. Verify every detail for accuracy, then confirm that you are providing accurate information under penalty of perjury.
  9. Submit your application. Click submit. If all information is correct and your entity qualifies, the IRS will immediately assign an EIN and display it on screen. Write it down or print the confirmation page; you will not be able to retrieve this confirmation from the online portal later.
  10. Save your confirmation. The IRS will provide an Official EIN Confirmation Letter, which you can either print immediately or access via the online portal for a limited time. Download and save this letter to your records.

Processing time: Instant (EIN issued on screen immediately after submission).

Option 2: Apply by Telephone

If you prefer to speak with an IRS representative or cannot apply online, you can call the IRS EIN phone line.

  1. Prepare your information. Have all the documents and details listed above in front of you before calling. The phone representative will need accurate, detailed answers.
  2. Call the IRS at 1-800-829-4933. This is the toll-free EIN phone line. Hours are 7 a.m. to 10 p.m. Eastern Time, Monday through Friday. Wait times may be longer during peak tax season (January through April) and during the first business day of a new fiscal quarter.
  3. Provide your information to the representative. They will ask the same questions as the online form: your business structure, Massachusetts address, business description, expected employee count, and the primary owner's personal information.
  4. Confirm your details. The representative will read back the information you provided to confirm accuracy. Do not hesitate to correct any errors on the spot.
  5. Receive your EIN verbally. Once verified, the representative will issue your EIN over the phone and provide a confirmation reference number. Write down both the EIN and reference number.
  6. Request written confirmation. Ask the representative to mail you an Official EIN Confirmation Letter to the address you provided. This may take 2 to 4 weeks by postal mail.

Processing time: Immediate (EIN issued verbally during the call); written confirmation arrives in 2 to 4 weeks.

Option 3: Apply by Mail

If you cannot apply online or by phone, you may mail a completed Form SS-4 (Application for Employer Identification Number) to the IRS.

  1. Obtain Form SS-4. Download the form at https://www.irs.gov/pub/irs-pdf/fss4.pdf or call the IRS at 1-800-829-3676 to request a paper copy.
  2. Complete all required fields. Fill out the form entirely. Key fields include your Massachusetts business address, business name, business type (LLC, corporation, etc.), Social Security number of the responsible party, date you expect to begin business, and a description of your business activities. Print clearly or type the form; handwritten entries that are hard to read may delay processing or require a follow-up call.
  3. Sign and date the form. The responsible party (owner, member, or authorized representative) must sign and date the form. Forms without a signature will be returned by the IRS as incomplete.
  4. Include your phone number. Provide a daytime phone number where the IRS can reach you if they need to verify information or ask follow-up questions.
  5. Mail to the correct IRS address. Mail your completed Form SS-4 to the IRS Processing Center that serves Massachusetts: Internal Revenue Service, ATTN: EIN Operation, 207 Broadway, New York, NY 10007. Do not mail to the local IRS office or other address; the mail will take longer to be routed and processed. Consider mailing with tracking and delivery confirmation to verify receipt.
  6. Wait for confirmation. The IRS will send you an Official EIN Confirmation Letter (Form 147-C) by mail within 4 to 6 weeks. If you do not receive it after 8 weeks, call the IRS EIN phone line at 1-800-829-4933 with your Form SS-4 confirmation number or mailing reference to inquire.

Processing time: 4 to 6 weeks (mailed confirmation).

After You Receive Your EIN: What Comes Next

Once you have received your EIN, several additional steps apply if you are operating in Massachusetts and have employees or are engaged in certain business activities.

Register for Massachusetts State Tax Accounts

An EIN is a federal number. Massachusetts issues its own state tax accounts for different purposes. You will need to register with the Massachusetts Department of Revenue if any of the following apply:

  • You have employees. Register for a Withholding Account to file state payroll taxes. Massachusetts requires employers to withhold state income tax from employees' paychecks. Contact the Department of Revenue at https://www.mass.gov/orgs/massachusetts-department-of-revenue.
  • You sell taxable goods or services. If your business is subject to Massachusetts sales tax (6.25 percent), you must register for a sales tax permit. Apply online at https://mtc.dor.state.ma.us/mtc/_/. You can start the application immediately; processing typically takes 1 to 2 weeks. You will need your EIN or business tax ID to complete the registration.
  • You structure your business as a corporation. C-corporations and S-corporations are subject to Massachusetts corporate excise tax (8.0 percent of net income plus $2.60 per 1,000 dollars of tangible property or net worth, with a minimum excise of $456). File your first Massachusetts corporate tax return with your federal return.

Apply for a Doing Business As (DBA) Certificate

If you are operating under a business name different from your legal name or entity name, you must file a Business Certificate with the town or city clerk in every Massachusetts city or town where you have an office. This is separate from your EIN and state tax registration. Each municipality charges a local fee (Boston charges $65, plus $35 more for non-residents) and issues the certificate for a four-year term; you must renew every four years. Visit your local city or town clerk's office or website to file.

Tips to Avoid Common Mistakes

  • Do not confuse your EIN with your Social Security Number. An EIN is a separate federal business ID. Even if you are a sole proprietor, keeping your SSN and EIN separate protects your personal credit and privacy. Use your EIN on business correspondence, tax returns, and vendor accounts; use your SSN only for personal taxes and credit.
  • Use your correct Massachusetts business address. The IRS requires your principal place of business address, not a P.O. box. If you work from home, provide your home street address in Massachusetts. Using an incorrect address can delay processing or cause the IRS to issue correspondence to the wrong location.
  • Choose the correct business structure on your application. The form must accurately reflect whether you are a sole proprietor, partnership, LLC, C-corporation, S-corporation, or other entity. Selecting the wrong category may result in incorrect tax filing requirements and penalties. If you are uncertain about your structure, confirm with your business formation documents (Certificate of Organization from the Massachusetts Secretary of the Commonwealth).
  • Apply immediately if you have employees. Do not wait to receive your EIN. If you hire your first employee before your EIN is issued, you must provide the IRS with a temporary ID or your SSN on payroll forms, then correct the forms once your EIN arrives. To avoid this, apply for your EIN before hiring.
  • Save your Official EIN Confirmation Letter. Keep the IRS confirmation letter in a secure location (physical and digital copy). You will need to reference your EIN for tax filings, bank account setup, vendor applications, and regulatory compliance. The IRS does not routinely re-issue confirmation letters if you lose yours; you may need to contact them to verify your EIN, which can take time.
  • Do not assume online-only means instant everywhere. While the online EIN application issues a number immediately, mailed confirmation may take 2 to 4 weeks. If you need to open a bank account or file taxes before receiving your paper confirmation, call the IRS to verify your EIN and obtain a verbal confirmation with a reference number.
  • Register for Massachusetts sales tax on your own timeline. You do not need to obtain your EIN before registering for a sales tax permit, but you will need your EIN to complete the Massachusetts permit application. Plan for both steps to happen within your first month of business operations.

Expected Results and Next Steps

After submitting your EIN application, you can expect one of the following:

  • Online application: Your EIN is issued immediately. You will see a nine-digit number on screen (e.g., 12-3456789). The Official EIN Confirmation Letter can be printed or accessed on the IRS portal. Use your EIN right away for business bank accounts, vendor accounts, and IRS correspondence.
  • Phone application: Your EIN is issued verbally during your call. Write down the number exactly as the IRS representative states it. A paper confirmation letter will arrive in 2 to 4 weeks. In the interim, keep a record of your EIN and the reference number from the call.
  • Mail application: Your Official EIN Confirmation Letter will arrive 4 to 6 weeks after the IRS receives your Form SS-4. Do not be alarmed if processing takes the full 6 weeks; this is normal. Once received, your EIN is valid and can be used for all business purposes retroactive to the start date you provided on the application.

With your EIN in hand, the next steps for your Massachusetts business are to register for state tax accounts (if applicable), open a business bank account, obtain any required industry or professional licenses, and set up your bookkeeping system. An EIN is not a substitute for other licenses or permits; many Massachusetts businesses require additional municipal or state authorization depending on their industry (food service, alcohol, construction, professional services, etc.).

This article provides general informational guidance for Massachusetts business owners. It is not legal or tax advice. Every business situation is unique, and tax obligations vary based on your structure, industry, and employee count. Consult a qualified CPA, tax attorney, or the Massachusetts Department of Revenue if you have questions about your specific tax requirements or filing obligations.