How to Get an EIN in Massachusetts (2026)
You get an EIN in Massachusetts for free directly from the IRS - there is no state fee. The fastest way is the online IRS EIN Assistant, which issues the number immediately; you can also file Form SS-4 by fax or mail. Afterward, register with the Massachusetts DOR through MassTaxConnect.
Quick Answer
- Cost
- Free from the IRS
- Fastest method
- Online IRS EIN Assistant - immediate
- Alternative
- Form SS-4 by fax or mail
- Requirement
- Responsible party with SSN or ITIN
- State step
- Register with the DOR via MassTaxConnect
- Issuer
- Only the IRS issues EINs
What an EIN Is and Why a Massachusetts Business Needs One
An Employer Identification Number (EIN) is a nine-digit federal tax ID the IRS issues to businesses, formatted like 12-3456789. It is the business equivalent of a Social Security number, used to file federal taxes, open a business bank account, hire employees, and apply for licenses. The EIN is federal, so it is the same whether your business is in Massachusetts or any other state.
You need an EIN if your business has employees, is a multi-member LLC, operates as a corporation or partnership, or is required to file certain excise or employment tax returns. A single-member LLC or sole proprietor with no employees may use the owner's SSN, but most get an EIN anyway to keep business and personal finances separate and to avoid sharing an SSN. See our national EIN guide for the full picture.
The EIN Is Free - Apply Directly With the IRS
The most important thing to know: an EIN is completely free directly from the IRS. There is no state fee and no charge for the number itself. Many third-party websites offer to "get your EIN" for $50 to $300; they simply file the same free form on your behalf, and none of them are the IRS. Apply yourself at irs.gov.
The IRS is the only issuer. Whether you form your Massachusetts LLC yourself or with a service, you can obtain the EIN separately at no cost. Beware look-alike sites using government-style branding. Our business tax page and the glossary explain how the EIN fits into your overall tax setup.
How to Apply for an EIN
There are three ways to apply. The online EIN Assistant is fastest: it is available Monday through Friday during posted hours, and you receive your EIN immediately at the end of the session. To use it, the responsible party must have a valid SSN or ITIN, and the business must have a U.S. address. You cannot save and return, so complete it in one sitting.
You can also file Form SS-4 by fax (about four business days) or mail (about four weeks). International applicants without an SSN or ITIN cannot use the online tool and instead apply by phone, fax, or mail. If you need an individual taxpayer ID first, see our ITIN guide. Have your entity type, formation date, and responsible party details ready before you start.
The Responsible Party and What You Need
Every EIN application must name a responsible party - the individual who ultimately owns or controls the business and its funds. The IRS uses this to prevent shell entities, and only individuals (not other entities) can serve, except for certain government bodies. The responsible party provides their name and SSN or ITIN, and each responsible party is limited to one EIN per day.
Before applying, gather your legal business name exactly as registered with the Massachusetts Secretary of State, the entity type, the formation date, the number of expected employees, and your principal business activity. If you have not yet formed your entity, do that first so the EIN matches your legal name. Consistency between your IRS record and your Massachusetts registration prevents processing problems later.
After the EIN: Register for Massachusetts Taxes
The federal EIN is only the first tax ID. Once you have it, most Massachusetts businesses must register with the Massachusetts Department of Revenue for state-level accounts. Through MassTaxConnect you register for accounts such as sales/use tax, meals tax, and employer withholding, depending on your activity. You use your EIN when you set up these state accounts, which is why you obtain the EIN first.
If you have employees, you also register for Massachusetts withholding and state unemployment insurance, and you handle federal payroll deposits under the same EIN. If you sell taxable goods or services, you need a Massachusetts sales-tax permit before making sales. Our Massachusetts LLC tax filing and Massachusetts licensing guides cover the next steps.
When You Need a New EIN vs. Keeping Yours
You generally do not need a new EIN for everyday changes such as moving, changing your business name, or adding a location - you update the IRS instead. You also keep the same EIN if a single-member LLC simply elects S-corp or corporate taxation while remaining the same entity.
You do need a new EIN when the entity's structure or ownership fundamentally changes - for example, a sole proprietorship incorporates or forms an LLC, a partnership becomes a corporation, or you create a genuinely new entity. If you ever close the business, notify the IRS to close the business account; see our Massachusetts dissolution guide. When in doubt, the IRS publishes a specific list of change-of-entity triggers.
EIN Application Methods Compared
The table compares the ways to get your free EIN from the IRS. Choose the method that fits your eligibility and timeline.
| Method | Speed | Who can use it |
|---|---|---|
| Online EIN Assistant | Immediate | Responsible party with SSN or ITIN, U.S. address |
| Fax Form SS-4 | About 4 business days | Any applicant |
| Mail Form SS-4 | About 4 weeks | Any applicant |
| Phone | Immediate | International applicants without SSN/ITIN |
Every method is free. After you receive the EIN, register with the Massachusetts Department of Revenue for Massachusetts state tax accounts that apply to your business.
Verify Current Details and Avoid Common Pitfalls in Massachusetts
State fees, tax rates, forms, and deadlines change from year to year, so before you file or pay anything, confirm the current figures directly on the official Massachusetts agency websites cited below. The amounts on this page are effective for 2026 and are set by the government, not by any filing service. Public records and most state forms are free or low-cost, and a federal EIN is always free from the IRS - be cautious of third-party websites that charge inflated fees to file routine state paperwork or to obtain a number the government issues at no cost. Reading the primary source yourself is the surest way to avoid outdated or misleading second-hand information, which is exactly why every figure here links to a Massachusetts agency, statute, or the IRS.
A second common pitfall is blurring the line between you and your business. If you operate through an LLC or corporation, the liability protection depends on treating the entity as genuinely separate: keep a dedicated business bank account, sign contracts in the company name, keep clean records, and adopt an operating agreement even if Massachusetts does not require you to file one. Commingling personal and business money is the fastest way to weaken the shield if the company is ever sued. Owners should also plan for taxes early - set aside money for income and self-employment tax, and review whether an S-corp election fits once profits grow. See our business tax overview for how the pieces connect.
Finally, do not confuse a state business registration with trademark ownership. Clearing a name in the Massachusetts business entity search means no other registered entity has that exact name - it does not grant nationwide rights or clear a federal trademark, so search the USPTO database before you invest in branding. Likewise, if you use a name different from your legal entity name, file a Massachusetts DBA. When your business changes or winds down, follow the proper Massachusetts dissolution steps rather than simply abandoning the entity, which leaves fees and filings running. For definitions of the terms used throughout this guide, see the glossary, and use the related Massachusetts guides below to complete each step in the right order.
Frequently Asked Questions
How much does an EIN cost in Massachusetts?
Nothing. The IRS issues EINs for free, and there is no state charge. Avoid third-party sites that charge $50 to $300 to file the same free application on your behalf.
How do I get an EIN in Massachusetts?
Apply free with the IRS: use the online EIN Assistant for an immediate number, or file Form SS-4 by fax or mail. Have your legal business name, entity type, and responsible party's SSN or ITIN ready.
Do I need an EIN for a Massachusetts LLC?
You must have an EIN if your LLC has more than one member or any employees, or elects corporate taxation. A single-member LLC with no employees may use the owner's SSN but usually gets an EIN anyway.
Can I get an EIN without an SSN?
Yes. If you do not have an SSN or ITIN, you cannot use the online tool, but you can apply by phone, fax, or mail with Form SS-4. You may also apply for an ITIN separately.
What do I do after getting an EIN in Massachusetts?
Register with the Massachusetts Department of Revenue for state tax accounts such as withholding and sales tax, open a business bank account, and use the EIN on your federal and state tax filings.
Related
- How to get an EIN in Nebraska (sibling)
- What is an ITIN?
- How to form an LLC (cluster hub)
- How to form an LLC in Massachusetts
- How to get an EIN
- Registered agent requirements
- Business tax overview
- S-corp vs LLC
- How to dissolve an LLC
More Massachusetts business guides
Business License In Dissolve An Llc In Annual Report Articles Of Organization Business Entity Search Certificate Of Formation Dba Filing Llc Tax Filing Operating Agreement Registered Agent
Sources
- IRS - Get an Employer Identification Number (free EIN).
- IRS - Apply for an Employer Identification Number (EIN) Online.
- IRS - About Form SS-4, Application for Employer Identification Number.
- IRS - Responsible Parties and Nominees.
- IRS - Single Member Limited Liability Companies.
- IRS - Limited Liability Company (LLC) - federal classification.
- Massachusetts DOR - Register your business with MassTaxConnect.
- Massachusetts DOR - Business taxes.
- Massachusetts Secretary of the Commonwealth - Corporations Division.
- Massachusetts Legislature - General Laws Chapter 156C (LLC Act).
- Cornell LII - Limited liability company (LLC).
- Cornell LII - 26 U.S. Code Sec. 7701 - Definitions (entity classification).
- Justia - Massachusetts General Laws - LLCs.
- USA.gov - Get a federal tax ID number.
LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. Laws, fees, and thresholds change; verify current requirements with the IRS and Massachusetts Department of Revenue before acting.