Getting an EIN in Maine costs nothing and takes about 15 minutes online, and as of 2026 the IRS issues it the same day. Forming the Maine LLC comes first, so the name on the EIN matches the state record. Then comes the Maine work: Maine Revenue Services on the Maine Tax Portal for withholding and sales tax, plus ReEmployME and the Paid Leave Portal after a first hire.
How to Get Your Maine EIN
To get an EIN in Maine, form your LLC first, then apply free through the IRS online EIN Assistant in about 15 minutes and receive the number the same day; the EIN is federal, while Maine withholding, sales tax, unemployment, and paid leave are registered separately.
- Cost: free from the IRS; third-party sites charge $150 to $300 for the same number.
- Time: about 15 minutes online and issued the same day; fax SS-4 about 4 business days, mail about 4 weeks.
- Federal step: the IRS online EIN Assistant, or Form SS-4 by fax or mail.
- Maine step: the Maine Tax Portal, “Register a New Business – Start Here,” for withholding and sales/use tax.
- After hiring: ReEmployME for unemployment and the Maine Paid Leave Portal for PFML.
- Who needs one: most Maine LLCs; any entity other than a sole proprietor needs a FEIN to register for a Maine tax number.
- Contacts: IRS Business and Specialty Tax Line 800-829-4933; Maine Revenue Services via the Maine Tax Portal.
Does Your Maine LLC Need an EIN?
A Maine LLC’s federal Employer Identification Number (EIN) requirement depends on how it’s taxed and whether it hires. One Maine angle pushes most owners to apply early: any entity other than a sole proprietor needs a FEIN to register for a Maine tax number with Maine Revenue Services.
| Business type | EIN required? | Notes |
|---|---|---|
| Single-member Maine LLC, no employees | Not federally required | Disregarded entity; still needed for Maine tax accounts and banking |
| Single-member Maine LLC with employees | Yes | Payroll and withholding registration require it |
| Multi-member Maine LLC | Yes | Taxed as a partnership by default |
| Maine LLC electing S-corp or C-corp | Yes | Needed for the election and federal filing |
| Sole proprietor | Sometimes | Only if hiring or filing certain excise returns |
| Partnership | Yes | Every partnership needs its own EIN |
A single-member Maine LLC with no employees isn’t federally required to have an EIN, since the IRS treats it as a disregarded entity. Even so, most owners apply anyway, because a bank account, payroll, and Maine Revenue Services registration all expect one.
Many first-time owners let a formation service handle the Certificate of Formation and the EIN together. It’s worth seeing how the best Maine LLC services compare before paying anyone for the EIN, since the IRS hands it out for nothing.
How to Apply for Your Maine EIN, Step by Step
Most Maine owners finish the online application in about 15 minutes, as long as the Certificate of Formation is already approved. Here’s the part competitors skip: the IRS issues the CP 575 once and won’t reprint that notice, so download it before you close the tab. Boost Suite’s legal editor notes the entity-classification screen causes the most refiles among first-time Maine filers.
- Confirm your Maine LLC is approved: the legal name on the EIN must match the state record, so check how long Maine LLC approval takes before you apply.
- Open the IRS EIN Assistant: current hours run Monday to Friday 6 a.m. to 1 a.m. ET, Saturday 6 a.m. to 9 p.m., and Sunday 6 p.m. to midnight.
- Pick the entity type carefully: this screen trips people up and is the usual cause of a forced re-file.
- Enter the legal name, then any DBA: both should mirror the Maine Secretary of State filing.
- Name the responsible party: a natural person with an SSN or ITIN; nominees aren’t allowed.
- Submit and save the CP 575: download it on the confirmation screen, since the IRS issues it only once.
Maine EIN Approval Letter: Save Your CP 575 Before Maine Tax Portal, ReEmployME, and PFML Setup
After the IRS approves your Maine EIN online, the confirmation screen gives you access to the CP 575, the official EIN confirmation letter. Save it before moving into Maine registrations, because the EIN is federal while your Maine withholding, sales tax, unemployment, and paid leave accounts are separate state systems.
The letter shows your LLC’s legal name, mailing address, assigned EIN, and IRS confirmation details. For a Maine LLC, compare the legal name against your approved Certificate of Formation before using the number with Maine Revenue Services, ReEmployME, a payroll provider, or a bank.
- Use the CP 575 as your federal proof: banks, payroll providers, and tax platforms may ask for it before accepting the EIN.
- Do not confuse the numbers: your EIN is not your Maine Tax Portal account number, ReEmployME employer account, or Paid Leave Portal login.
- Match the Maine LLC name first: the CP 575 should line up with the Maine Secretary of State record before you register withholding, sales/use tax, unemployment, or PFML.
The IRS does not duplicate the original CP 575. If you lose it later, you can request a 147C EIN verification letter from the IRS, but it is better to download and store the CP 575 before closing the approval screen.
Prefer paper? Fax Form SS-4 to 855-641-6935 and the IRS generally faxes the number back in about four business days, while mailing runs roughly four weeks. International applicants whose business sits outside the U.S. can call 267-941-1099, though domestic applicants can’t get an EIN by phone.
The EIN costs nothing. Third-party companies that charge $150 to $300 are reselling a number the IRS provides at no cost, and you can request only one EIN per responsible party per day.
Get the Maine LLC record settled before the IRS creates your EIN trail.
The EIN is free through the IRS, but the application only works smoothly when your Maine Certificate of Formation is already approved and the details are ready. Northwest Registered Agent can help with Maine LLC formation, registered agent service, and EIN filing support if you want the legal name, entity classification, responsible party, and CP 575 record handled in a cleaner sequence.
What to Match to Your Maine Certificate of Formation
Before opening the application, gather the details Form SS-4 asks for and confirm they match Maine’s record exactly. A gap between the CP 575 and the Maine Secretary of State filing is what forces re-filings later.
- Approved legal name: exactly as it reads when you look up your Maine LLC’s record.
- Maine charter number and formation date: both sit on your Certificate of Formation.
- Responsible party and TIN: the SSN or ITIN of the person in control of the entity.
- Entity type and member count: which should match what’s in your Maine operating agreement for multi-member LLCs.
- Reason for applying and business address: new business, hiring, or banking, plus a Maine address.
Form the Maine LLC first, then apply, so the name on the EIN can’t drift from the state record.
EIN vs Your Maine Withholding and Sales Tax Numbers
Type “Maine tax ID” into a search and you’ll get several different answers, and this is where it gets tricky. The federal EIN is one number; the rest aren’t federal and come from Maine Revenue Services and the Maine Department of Labor.
| Registration detail | IRS EIN (federal) | Maine state numbers |
|---|---|---|
| Issued by | Internal Revenue Service | Maine Revenue Services and Maine Department of Labor |
| Used for | Federal filing, banking, payroll setup, state registration | Maine withholding, sales/use tax, unemployment, PFML |
| Who needs it | Most Maine LLCs | LLCs that hire or make taxable Maine sales |
| Where to get it | IRS EIN Assistant | Maine Tax Portal and ReEmployME |
When a Maine client tells me, “I already have my tax ID,” I have to ask which one. I’ve watched owners hand a bank their ReEmployME number instead of the EIN, or assume the EIN already covers sales tax. It doesn’t. Write down each number the day it’s issued and label which office gave it to you, because untangling them at tax time is a slow afternoon.
After Your EIN: Registering With Maine Revenue Services and ReEmployME
The EIN unlocks the Maine registrations, but it doesn’t replace them. Most LLCs touch two or three of the accounts below, depending on whether they hire and what they sell.
Maine income tax withholding
An LLC with Maine employees opens a Maine Income Tax Withholding Account with Maine Revenue Services on the Maine Tax Portal, through “Register a New Business – Start Here.” Withholding runs on Form 941ME, with Form 900ME for payments and Form W-4ME for employees. Maine’s individual rates run 5.8% to 7.15%.
Maine sales and use tax
Selling taxable goods in Maine means registering for a sales tax account and receiving a Retailer Certificate that displays your registration number. The general rate is 5.5%.
Remote sellers register once Maine gross revenue tops $100,000 in the prior or current calendar year, and there’s no 200-transaction rule. A Resale Certificate is available once the account is active and annual gross sales reach $3,000.
Maine unemployment through ReEmployME
Here’s the catch with Maine: unemployment lives outside the Maine Tax Portal. Employers register at ReEmployME with the Maine Department of Labor, file Form ME UC-1 each quarter, and pay on the first $12,000 of each worker’s wages. The 2026 new-employer combined rate is 2.54%.
Maine Paid Family and Medical Leave
Maine PFML is the newest layer, and it’s easy to miss. Employers paying Maine wages report quarterly through the Maine Paid Leave Portal; contributions began in January 2025, and benefits start for leave taken on or after May 1, 2026. The premium is 1% of wages at 15 or more employees and 0.5% below that.
A multi-member Maine LLC with nonresident members may also owe pass-through entity withholding on Maine-source income, filed on Form 941P-ME at 7.15%, or 8.93% for a nonresident C-corporation member.
Registering each account takes your EIN and the entity details. State filings carry their own costs apart from the free EIN, so it’s worth checking Maine LLC filing fees and keeping a Maine registered agent current for good standing.
The error I see every Maine hiring season is an owner registering withholding on the Maine Tax Portal and assuming unemployment came with it. It didn’t. ReEmployME is a separate Department of Labor system, and for 2026 the Paid Leave Portal is a third login on top. I tell new employers to set up all three the week they run first payroll, so no quarterly deadline slips past them.
EIN Mistakes That Trip Up Maine LLC Owners in 2026
Most EIN errors are universal, but a few are pure Maine, and 2026 added two fresh ones you’ll want to double-check.
- Wrong entity classification: selecting corporation when the LLC is really a partnership or disregarded entity.
- Naming a nominee: the responsible party has to be a real person, not a formation agent.
- Treating the EIN as a state login: it doesn’t register withholding, ReEmployME, or PFML, and it isn’t a Maine business license or any of the local licenses you may still need.
- Quoting the old cannabis rate: Maine’s adult-use cannabis sales tax rose to 14% on January 1, 2026.
- Citing the Service Provider Tax: Maine repealed it on January 1, 2026, and those services now fall under the 5.5% sales tax.
Maine quietly repealed the Service Provider Tax effective January 1, 2026, and I still see telecom, fabrication, and digital-service LLCs filing as though it’s alive. Those services moved under regular sales and use tax at 5.5%. If your Maine business ever touched the old Service Provider Tax, recheck your sales tax registration this year, before you file, not after a notice lands.
Lost Your CP 575 or Restructuring Your Maine LLC?
Lost the EIN confirmation? Check the CP 575, a prior federal return, or old bank records first. The IRS won’t reprint that original notice, though it’ll issue a 147C verification letter if you call the Business and Specialty Tax Line.
Need to look up an EIN by company name for a vendor or client instead? That’s a different search entirely.
A new EIN isn’t always required. Changing your Maine LLC’s name or address uses Form 8822-B, and a tax-classification change uses Form 8832. Converting a sole proprietorship into an LLC, or shifting a single-member LLC to multi-member, does call for a new one. Keep your Maine annual report filed too, since it’s due June 1 each year.
Maine EIN Questions Boost Suite Hears Most
Maine owners ask a familiar set of questions once the EIN lands. Here’s what comes up most, with the Maine-specific answers.
Is a Maine EIN different from a federal EIN?
No. The IRS issues one EIN that works in every state, so there’s no separate Maine-issued EIN.
Is the EIN really free for a Maine LLC?
Yes. The IRS doesn’t charge, and any site that charges a fee resells a free federal service.
What’s the difference between my EIN and my Maine sales tax registration number?
The EIN is federal and comes from the IRS. The sales tax registration number and Retailer Certificate come from Maine Revenue Services and apply only to taxable Maine sales.
Do I register Maine withholding and unemployment in the same place?
No. Withholding runs through the Maine Tax Portal at Maine Revenue Services, while unemployment is filed through ReEmployME at the Department of Labor.
Does my Maine LLC need a Maine Paid Leave Portal account in 2026?
If it pays Maine wages, yes. PFML contributions started in January 2025, and benefits begin for leave on or after May 1, 2026.
Can a foreign-owned Maine LLC get an EIN without an SSN?
Yes. International applicants whose business is outside the U.S. call 267-941-1099 or submit Form SS-4 by fax or mail; the responsible party uses an SSN or ITIN where one exists.
Did Maine repeal the Service Provider Tax for 2026?
Yes, effective January 1, 2026. The services it once covered now fall under standard sales and use tax at 5.5%, which changes how many service LLCs register.
- Maine Paid Family and Medical Leave, Employers
- IRS, Get an Employer Identification Number
- IRS, Instructions for Form SS-4
- Maine Revenue Services, Employer Withholding
- Maine Revenue Services, Sales and Use Tax FAQ
- Maine Revenue Services, Electronic Services
- Maine Department of Labor, Unemployment Employer Services
Looking for an overview? See Maine LLC Services
Get Your Maine LLC EIN with Harbor Compliance
Harbor Compliance helps Maine LLC owners apply for a federal tax ID, so they can open a business bank account, hire employees, and prepare for tax registrations with confidence.
