A Montana EIN is free as of 2026, issued the same day by the IRS through its online EIN Assistant. Montana itself adds no state EIN and no general sales tax permit. Form your Montana LLC first, then apply, so the federal number matches the approved name.
Montana EIN: Cost, Timing, and Next Steps
A Montana EIN is the federal Employer Identification Number, free from the IRS and usually issued the same day online. Montana has no separate state EIN, so a new LLC registers accounts like withholding or unemployment only when it hires or owes a specific tax.
- Cost: free direct from the IRS; third-party filing sites charge $150 to $300 for the same federal service
- Apply: online via the IRS EIN Assistant, or Form SS-4 by fax, which takes about four business days, or mail, which takes about four weeks
- After the EIN: register withholding with the Montana Department of Revenue through its TransAction Portal, and unemployment with the Department of Labor and Industry
- No general sales tax permit: Montana has no statewide general sales tax, so check narrower taxes like lodging or the contractor’s gross receipts tax instead
- Who needs one: multi-member LLCs, any LLC with employees, corporate-tax elections, and most single-member LLCs that want a bank account
- IRS help line: Business and Specialty Tax Line, 800-829-4933
Do You Need an EIN for a Montana LLC?
An EIN requirement turns on a Montana LLC‘s structure and activity, not its location. Federal rules don’t change between Helena and anywhere else, so the table below applies.
| Business type | EIN required? | Notes |
|---|---|---|
| Single-member LLC, no employees | Not federally required | Disregarded entity; most owners get one anyway for banking |
| Single-member LLC with employees | Yes | Payroll and federal employment tax need it |
| Multi-member LLC | Yes | Taxed as a partnership by default |
| LLC electing S-corp or C-corp tax | Yes | The corporate election carries its own filings |
| Sole proprietor (no LLC) | Usually no | Unless hiring employees or filing certain excise taxes |
| Partnership | Yes | Always requires an EIN |
A single-member Montana LLC with no employees isn’t federally required to hold an EIN, since the IRS treats it as a disregarded entity for income tax. Most owners get one anyway; it keeps the Social Security number off vendor forms, and Montana banks expect it before opening an account.
Owners still weighing a formation route can compare Montana LLC options first.
How to Apply for a Montana EIN Online
Most Montana owners apply online, and the IRS assigns the number on the spot. Here’s the process, plus the backups for when the tool won’t work.
- Confirm the Montana LLC is approved: apply only after the Secretary of State clears the Articles of Organization, since Montana LLC approval timelines set when the name is final.
- Open the IRS EIN Assistant: it runs Monday to Friday 6 a.m. to 1 a.m. ET, Saturday 6 a.m. to 9 p.m. ET, and Sunday 6 p.m. to midnight ET. Finish in one sitting, since the session resets after 15 minutes of inactivity.
- Pick the entity type carefully: this screen drives more refilings than any other, so match the LLC’s federal tax treatment, not the closest-sounding label.
- Enter the legal name and any trade name: match the Articles of Organization, adding a DBA only if the LLC uses one.
- Name the responsible party: list a natural person with an SSN or ITIN who controls the LLC, never a nominee.
- Choose the reason and submit: select “started a new business”; the EIN issues immediately on approval.
- Download the CP 575 right away: the IRS won’t reissue the original, so save it the moment it appears.
Montana EIN Approval: Save Your CP 575 Before Montana Tax Accounts
Once the IRS approves the online application, it issues the EIN immediately and shows the CP 575 confirmation letter. Save that letter before you move into Montana withholding, unemployment, banking, or vendor paperwork.
The CP 575 is the official IRS notice showing the LLC’s legal name, address, and federal EIN. For a Montana LLC, this is the number you use before opening Montana Department of Revenue withholding or Department of Labor and Industry unemployment accounts.
For owners who can’t use the tool, Form SS-4 goes by fax (about four business days with a return fax number) or mail (about four weeks).
International applicants based outside the United States can instead call 267-941-1099 on weekdays, 6 a.m. to 11 p.m. ET.
The EIN is free from the IRS, while paid sites charge $150 to $300 for the same filing. The IRS also issues one EIN per responsible party per day, so batch filers space applications out.
The entity-type screen is where I see Montana LLCs go wrong, hands down.
I once saw a single-member owner pick “corporation” because it sounded more legitimate. That choice tied the EIN to the wrong tax treatment, and the owner lost a month and a few hundred dollars unwinding it.
If you have not filed Form 8832 or Form 2553, do not treat the LLC like a corporation. A single-member LLC is generally a disregarded entity, and a multi-member LLC is generally a partnership. Pick the default classification that actually fits, and if the screen makes you hesitate, close it and check before you submit.
Get the Montana LLC name final before the EIN follows it into tax and payroll records.
The EIN is free from the IRS, but the application should match your Montana Articles of Organization before you submit. Northwest Registered Agent can help with LLC formation, registered agent service, and optional EIN services so the legal name, entity type, responsible party, and CP 575 letter stay clean before you move into banking, Montana withholding, or unemployment accounts.
What to Prepare Before Applying for a Montana EIN
A few details up front keep the application clean, and they’re mostly already on the Montana formation paperwork.
- The approved legal name, exactly as filed; a quick Montana business entity search confirms the spelling.
- The formation date and Montana Secretary of State filing number.
- The responsible party’s name and SSN or ITIN.
- The federal tax classification: disregarded entity, partnership, or corporate election.
- A business mailing address and the reason for applying.
Boost Suite’s position is to form the LLC first, then apply, so the CP 575 name matches the state record. The Articles of Organization run $35 as of 2026, per the Montana LLC filing fees.
The IRS won’t ask for an operating agreement, but a signed Montana operating agreement settles who the responsible party is before that screen loads.
Montana EIN vs Your Montana Tax ID Number
Search “Montana tax ID number” and you’ll hit a tangle of answers, since the phrase points at several numbers. The EIN is federal; Montana’s numbers come from separate agencies for separate jobs.
| Category | Federal EIN | Montana state accounts |
|---|---|---|
| Issued by | IRS | DOR (withholding), DLI (unemployment), Secretary of State (filing number) |
| Used for | Federal taxes, payroll, banking, 1099s | Montana wage withholding, UI contributions, entity records |
| Who needs it | Most LLCs, per the table above | LLCs with Montana employees or withholding obligations |
| Where to get it | irs.gov, free | TransAction Portal and UI eServices, after the EIN |
Montana issues no state version of the EIN. A “Montana tax ID” is usually the withholding account from the Department of Revenue or the unemployment account from the Department of Labor and Industry. Each is requested separately when the business needs it.
In Aaron Kra’s work across more than 25 states, the EIN-versus-state-number mix-up is the most common Montana filing error. It surfaces when a bank or payroll provider asks for a number the owner hasn’t set up.
Registering for Montana Withholding and Other State Accounts
The EIN unlocks Montana’s registrations, but only the ones an LLC triggers. Most new LLCs hit withholding and unemployment first; the rest depend on the industry.
Montana Withholding Through the Department of Revenue
A Montana LLC paying Montana wages registers a withholding account with the Montana Department of Revenue, online through the TransAction Portal (TAP) or by mail on Form GenReg. It needs the FEIN, the employee’s Montana start date, the legal name on that FEIN, any DBA, an address, and a contact.
Montana payroll catches people at the worst possible moment: the first paycheck.
Here is the part nobody warns you about. Montana no longer accepts the federal Form W-4 for state withholding, so a new hire’s federal form alone can leave you withholding the wrong amount from day one. Every Montana employee should complete Form MW-4 for Montana wage withholding.
Montana Unemployment Insurance Through the DLI
Once the LLC becomes a covered employer, it registers for unemployment insurance with the Department of Labor and Industry through UI eServices at uieservices.mt.gov. It then files the UI-5 quarterly report electronically.
Those reports are due the last day of the month after each quarter: April 30, July 31, October 31, and January 31. Montana’s 2026 taxable wage base is $47,300.
No General Sales Tax: What to Check Instead
Montana has no statewide general sales tax, so an ordinary retailer doesn’t register for a seller’s permit the way a California or Texas business would. There’s no such permit to get.
The Business Registry Resale Certificate isn’t one either; it’s resale documentation for out-of-state vendors. A Montana LLC selling into other states can still owe out-of-state sales tax once it crosses their nexus thresholds.
Special Montana Taxes by Industry
A few activities carry their own narrow accounts, which most LLCs skip:
- Lodging: hotels, short-term rentals, and marketplace hosts collect the lodging facility sales and use tax, a combined 8% (4% sales plus 4% use).
- Public construction: contractors register the 1% Contractor’s Gross Receipts Tax within 10 days of winning a public contract over $80,000.
- Resort towns: businesses in places like Big Sky, Whitefish, and West Yellowstone collect a local 3% resort tax run by the town.
Beyond taxes, a Montana LLC keeps its Montana annual report current and a Montana registered agent on file. The 2026 annual report fee is waived for filings between January 1 and April 15.
EIN Mistakes That Trip Up Montana LLC Owners
These errors recur in Montana, and most are easy to dodge once you spot them.
- Hunting for a Montana sales tax permit: the state issues none, yet owners sometimes pay a service to “get” one.
- Skipping Form MW-4 at the first hire: a federal W-4 alone leaves state withholding wrong, since Montana no longer accepts it for that purpose.
- Treating a Montana vehicle LLC as a tax shortcut: it still needs an EIN where applicable and doesn’t erase use, registration, or residency duties. Ask a Montana attorney first.
- Confusing the resale certificate with a permit: it’s vendor documentation, not authority to sell tax-free.
- Picking the wrong entity type on SS-4: a stray corporate selection ties the EIN to filings the LLC never intended.
- Naming a nominee as responsible party: the IRS wants a real person in control, and a name mismatch with the state record stalls the filing.
Finding a Lost EIN or Changing Your Montana LLC
Misplacing the EIN happens, and it’s usually a quick fix, since the number sits in more than one record.
If the CP 575 is gone, a prior federal return, the business bank file, or a 147C letter will help you locate a misplaced EIN. The IRS won’t reprint the original, but Letter 147C confirms the existing EIN.
Some changes need a new EIN, most don’t. Going from a sole proprietorship to an LLC, or single-member to multi-member, needs a fresh EIN. A name or address change runs on Form 8822-B, a classification change on Form 8832.
Montana EIN Frequently Asked Questions
These are the questions Montana LLC owners ask most, with the Montana-specific details generic guides skip.
Does Montana issue its own state EIN?
No, there’s no such thing as a Montana-specific EIN. The EIN is a federal number from the IRS, the same nine-digit format whether the LLC sits in Montana or anywhere else. What Montana issues separately are account numbers for withholding and unemployment, and only once the LLC hires.
Does a Montana LLC need a sales tax permit?
No. Montana is one of the few states with no general statewide sales tax, so there’s no seller’s permit to apply for. What applies instead are narrower taxes, mainly an 8% lodging facility tax and a 3% local resort tax in towns like Big Sky or Whitefish. Contractors on public jobs over $80,000 also owe a 1% gross receipts tax.
Is the Montana Business Registry Resale Certificate the same as a seller’s permit?
No, and this one trips up a lot of owners. The certificate is what a Montana buyer hands an out-of-state seller to buy inventory tax-free. It isn’t authority to make tax-free sales, and it isn’t filed with the Department of Revenue. Treat it as a purchasing document, not a sales permit.
Does Montana have a gross receipts tax on LLCs?
Not in the broad sense people mean. Montana has no Washington-style B&O tax and no Ohio-style commercial activity tax on ordinary businesses. The only gross-receipts charge is a narrow 1% tax on contractors working public construction contracts over $80,000, registered within 10 days of the award.
Can a foreign-owned Montana LLC get an EIN without an SSN?
Yes, and it’s routine. An owner without an SSN or ITIN can’t use the online tool, but can file Form SS-4 by fax or mail with the responsible party’s details. If the principal place of business is outside the United States, the owner can also apply by phone at 267-941-1099, a line reserved for international applicants.
Do Montana LLCs set up for vehicle registration still need an EIN?
Usually yes. If the LLC opens a bank account, hires, or files federal returns, it still needs an EIN. Montana’s lack of sales tax doesn’t erase use tax, registration fees, insurance, or residency questions on the vehicle itself. Anyone forming an LLC mainly to register a car should run the plan past a Montana attorney first.
- Montana Secretary of State: Business Services
- IRS: Get an Employer Identification Number
- IRS: Instructions for Form SS-4
- Montana Department of Revenue: Withholding Tax Accounts
- Montana Department of Revenue: TransAction Portal
- Montana Department of Revenue: General Sales Tax
- Montana Department of Labor and Industry: Unemployment Insurance for Employers
Looking for an overview? See Montana LLC Services
Get Help Applying for Your Montana LLC EIN with Harbor Compliance
Harbor Compliance can help prepare and file your EIN application accurately, so your Montana LLC gets the federal tax ID it needs for banking, hiring, taxes, and business registrations.
