How to Start an LLC in Montana: A Step-by-Step Guide

Starting an LLC in Montana is mostly an online filing with the Montana Secretary of State. You will check that your name is available, choose a registered agent with a real Montana street address, then submit the Articles of Organization through the state’s portal. The state filing fee is $35. After your LLC is approved, you can get an EIN from the IRS for free if you need one for banking, taxes, or hiring.

Montana LLC requirements before you file

Before you touch the filing form, Montana really comes down to 3 prep decisions: your Limited Liability Company (LLC) name, your registered agent, and how the LLC will be managed. Getting these right first makes the online filing fast and helps you avoid a rejection or a messy amendment later.

Choose a Montana LLC name that is available

Montana requires your LLC name to follow the LLC legal naming rules, including an LLC designator (like “LLC” or “limited liability company”) and the name must be distinguishable from other names already on record with the Secretary of State.

A quick way to keep this step painless is to do a short “collision check” before you fall in love with a name. Here’s what we recommend checking in the Montana business database search:

• Exact match (same spelling)
• Close variants (plural, spacing, punctuation, “and” vs “&”)
• Same keywords in a different order (common reason names feel “taken”)

That “distinguishable” rule is broader than many people expect because it also considers other entity names and certain registered names already on file.

Decide who will serve as your registered agent

Every Montana LLC must maintain a registered agent, and Montana’s rules require a real in-state physical address for filings (an actual street address or rural route box number).

Your registered agent choice is not just a checkbox. It’s the contact point for lawsuits (service of process) and certain official notices, so you want someone reliable and consistently available.

Here are the practical options most founders choose:

• You (or someone you trust) as the registered agent
  Works if you have a stable Montana address and you can be available during business hours.
• A commercial registered agent service
  Useful if you want address stability, you move often, or you do not want legal mail going to your home or storefront.

We recommend deciding this before you file because the Articles of Organization must include the agent information, and the filing acts as confirmation the agent has consented to serve.

If you want to compare providers, see our roundup of top Montana registered agent services.

Decide whether your LLC will be member-managed or manager-managed

This choice affects how the LLC runs day to day and what Montana expects you to list in your formation document.

• Member-managed usually means the owners (members) run the LLC.
• Manager-managed means the LLC appoints one or more managers to run it (they may or may not be members).

Montana’s Articles of Organization rules tie directly to this decision. If the LLC is manager-managed, the Articles must include a statement that it is managed that way and list the managers’ names and business mailing addresses. If the LLC is member-managed, the Articles must include a statement that it is managed by members and list the initial members’ names.

Here’s the simplest way to think about it:

We recommend picking the structure you will actually follow in real life. If your operating agreement says one thing but everyone behaves the opposite way, that is when disputes get messy later. (The Montana SOS also notes this is determined by your Articles and outlined in your operating agreement).

If you want a deeper breakdown, read our member-managed vs manager-managed guide.

Step-by-step guide to forming your Montana LLC

If you already picked your name, registered agent, and management type, the actual Montana filing is pretty quick. The goal is to file cleanly once, pay the right fee, then walk away with the PDFs you will need later (bank, tax accounts, and recordkeeping).

Step 1: Search your business name in the Montana SOS database

Do a quick an LLC name search first so you do not waste time filling out the form with a name that is too close to an existing record. Use Montana’s Business Search and run a few variations.

We recommend checking:

• your exact spelling
• the same words with different spacing or punctuation
• singular vs plural
• “and” vs “&”

If your first choice is borderline, tweak it now. It is easier than fixing it after submission.

Step 2: Create an account in the Montana Secretary of State filing portal

Montana’s online portal is where you register the LLC and where you will come back later for things like annual reports and updates. Create your user profile, then start a new business application from the Forms area.

Step 3: File the Articles of Organization online

This is the document that officially creates your Montana LLC. File it through the Montana Secretary of State Business Filing Portal. After signing in, go to the Forms page, start a new business application, and choose the domestic LLC Articles of Organization form.

Montana law lists what the Articles must include (like your LLC name, principal office mailing address, registered agent info, and required names tied to your management choice).

Step 4: Pay the Montana filing fee and wait for approval

The state filing fee for Articles of Organization is $35. If you are forming a series LLC, Montana adds $50 for each series member named.

Approval time depends on filing volume, so do not stress if it is not instant. The portal posts notices when volume is high, and you can track status from your account.

Step 5: Create your Montana LLC operating agreement

You do not file an operating agreement with the state, but it is still one of the most useful documents you can have. Montana law allows an operating agreement and even says it does not have to be in writing, but in real life we recommend putting it in writing anyway (banks and partners often expect it).

At minimum, your agreement should clearly cover:

• who owns what (percentages and contributions)
• who can sign and make decisions
• how profits are split
• what happens if someone leaves or you add a new member

Here is a plain-English explainer on how operating agreements work.

Step 6: Apply for an EIN with the IRS

An EIN is federal (IRS), and the IRS issues it for free (here is our walkthrough on how to get an EIN the right way). The Internal Revenue Service (IRS) specifically warns that you never have to pay a fee for an EIN.

If you cannot use the online tool, the IRS also allows EIN applications by fax or mail using Form SS-4 (mail takes time, so plan ahead).

Step 7: Register for Montana taxes or industry licenses if your business needs them

Not every Montana LLC needs to register for everything on day 1. It depends on what you do.

A simple way to think about it:

• If you will have employees, you will typically need withholding and unemployment insurance accounts. Montana DOR explains how to open a withholding account, and Montana’s UI eServices portal handles employer registration for unemployment insurance.
• If you sell products, Montana does not have a general statewide sales tax, but specific taxes can still apply in certain situations. The Montana Department of Revenue explains this clearly.
• If you are in a regulated industry, use Montana’s eStop Business Licenses program as a starting point for state registrations and licenses across partner agencies.

And if you are unsure, start with this quick check on whether an LLC needs a business license.

Montana LLC costs and ongoing compliance

Montana is pretty easy to budget for. You pay a one-time state filing fee to form the LLC, then you keep it in good standing by filing an annual report every year. The rest depends on what you need for your situation (privacy, licensing, paperwork support).

The Basic Cost to Start a Montana LLC

Here are the “must-pay” Montana Secretary of State fees most founders care about at the start:

Optional costs you may pay after formation

These are common “real life” costs that are not required for every Montana LLC, but show up often:

• Registered agent service:
  If you do not want to be your own registered agent, you can hire a commercial service. The state does not set that price, providers do.
• Copies and proof documents:
  A Certificate of Existence is $5 and is usually enough when someone asks for “good standing.”
• Changes later:
  If you update core details (like amendments/corrections), Montana has separate filing fees for those filings.
• Licenses and tax accounts (case-by-case):
  This depends on whether you hire employees, operate in a regulated industry, or need specific local permits.

Montana annual report deadline and filing fees

Montana LLCs file an annual report each year between January 1 and April 15. It is a Secretary of State compliance filing that keeps your LLC in good standing.

Montana’s current fee schedule is:

We recommend setting a reminder for early April and filing through the official Montana SOS portal instead of waiting until the deadline. For 2026, the Secretary of State specifically says the filing fee is waived for all Montana businesses that submit by April 15, 2026.

See the full breakdown of Montana LLC costs and ongoing fees if you want to budget end-to-end.

What to do after your Montana LLC is approved

Once the state approves your filing, you have an LLC on record. Now the focus shifts to keeping finances clean, keeping documents accessible, and registering extra names only if you actually need them.

Open a business bank account

Even for a simple LLC, a separate business account makes everything cleaner (bookkeeping, taxes, and liability separation).

Most banks will usually ask for some mix of: your approved Articles of Organization, EIN confirmation from the IRS (if you have one), operating agreement (even if it is just you), your ID, and sometimes basic business details (address, nature of business). If you need an EIN, get it directly from the IRS for free.

If you want a checklist before you walk into a bank, use this guide on opening an LLC business bank account.

Keep Your LLC Records and Ownership Documents Organized

Do yourself a favor and keep one folder (cloud + offline copy) that you can pull up in 30 seconds.

Start with:

• approved Articles of Organization + filing receipt
• operating agreement (signed)
• EIN confirmation (if issued)
• annual report confirmations (every year)
• member or manager decisions in writing (important approvals, new members, banking authority)
• contracts and tax registrations that matter to your business

This is boring paperwork, but it is exactly what saves time when a bank, lender, partner, or buyer asks for “company docs.”

Register an assumed business name if you will operate under a different brand

If you want to publicly operate under a name that is different from your LLC’s legal name, Montana lets you register an Assumed Business Name (ABN/DBA). An LLC is one of the entity types that can use an assumed business name.

• Where you file: through the Montana Secretary of State online portal (ABN/DBA form).
• State filing fee: $20.

We recommend doing this only when you are confident you will actually use the brand name in marketing, invoices, and customer-facing materials. Otherwise it is an extra renewal item to track for no real benefit.

If you want to sanity-check your scenario first, this quick explainer on when an LLC actually needs a DBA helps you avoid filing it when you do not need it

Montana-specific reminders that can save you problems later

Montana is one of those states where the filing steps are simple, but small “admin misses” can create totally avoidable headaches. These reminders are the stuff we see people trip over most often.

Montana handles LLC filings through its online SOS system

Montana’s Secretary of State runs business filings through its online portal. That same portal is also where you come back later for filings like annual reports and other updates, so treat your login like a core business credential.

We recommend doing 3 small things right away:

• Use a business email you actually monitor (this is where portal notices tend to go).
• Save a copy of your approved PDFs in a folder you can find fast (Articles, receipts, confirmations).
• Bookmark the portal page you will reuse (annual report and filing actions are inside the same system).

Your annual report keeps the LLC in good standing and is not a tax return

Montana’s annual report is a Secretary of State compliance filing. It keeps your LLC active and in good standing on the state record. It is separate from your federal tax filing and separate from any Montana tax registrations or returns (this quick explainer on what an LLC annual report is helps avoid the most common confusion).

Reinstatement can become more annoying and expensive if you miss filings

Montana’s fee schedule makes the pattern pretty clear: once you fall behind, you are no longer just “filing a late report.” You are stacking extra steps and extra fees on top of the original task.

If an LLC drops out of good standing and you need to reinstate it, Montana lists a $35 reinstatement fee plus an additional $35 per year for each year of delinquent annual reports. That can add up fast if you ignore it for more than one cycle.

We recommend treating the annual report like a fixed yearly habit: file it early in April, save the confirmation PDF, then forget about it for another year.

FAQs about starting an LLC in Montana

These are the questions most founders ask once they are ready to file. If you want the short version: Montana is affordable to start, the portal does most of the work, and the ongoing “stay active” task is your annual report.