How Long Does It Take to Form an LLC in Montana? (2026 Timeline)

TL;DR: Online Montana LLC filings are typically approved in 5-6 business days. Montana does not accept mail filings for LLC formation. For faster turnaround, the state offers 24-hour priority processing for $20 extra and 1-hour expedited processing for $100 extra. After approval, grab your EIN from the IRS immediately online, and you can open a bank account the same day.

Last updated: 2026-08-23

Starting a business in Montana is straightforward, but the timeline matters when you need to sign contracts, open accounts, or get moving. Here is exactly how long each step takes, what speeds things up, and where first-time founders get tripped up.

How long does the Montana LLC filing take online?

When you file your Articles of Organization through the Montana Secretary of State online portal, expect approval in 5-6 business days under standard processing. Montana does not offer paper or mail filings for new LLC formation, so online is your only option.

The state also offers two speed-up tiers:

• Priority processing: $20 extra on top of the $35 filing fee. Your LLC is reviewed within 24 hours.
• Expedited processing: $100 extra. Your LLC is reviewed within 1 hour during business hours.

Both expedite fees are in addition to the standard $35 state filing fee. You select your processing speed during the online filing process.

What is the full timeline from start to bank account?

Here is a realistic day-by-day breakdown of what a Montana LLC formation looks like when you handle it yourself online:

1. Day 0 (same day): Search the Montana business name database at biz.sosmt.gov to confirm your name is available. Choose a registered agent with a physical Montana address. Fill out the Articles of Organization online. Pay $35 (or $55 for priority, $135 for expedited). Submit.
2. Day 1-6: The Secretary of State reviews your filing. Standard processing takes 5-6 business days. Priority takes 24 hours. Expedited takes 1 hour.
3. Day of approval: Download your stamped Articles of Organization directly from the portal. No waiting for mail.
4. Same day as approval: Apply for your EIN at irs.gov. The IRS online tool issues it immediately. Free. Takes about 10 minutes.
5. Same day or next business day: Open a business bank account. Most banks need your Articles of Organization and EIN, both of which you now have.

So the fastest realistic path from "I want a Montana LLC" to "I have a bank account" is under 24 hours if you pay for priority or expedited processing and apply for your EIN right away.

What slows down a Montana LLC filing?

Montana's online system is relatively fast, but a few mistakes add days or weeks:

• Name conflicts: If your chosen name is too similar to an existing Montana business, the state will reject the filing. Search the database first and have two or three backup names ready.
• Incomplete registered agent info: Your registered agent must have a physical street address in Montana (no PO boxes). If the agent hasn't consented or the address is wrong, the filing stalls.
• Incorrect entity type or structure: Filing for the wrong entity type means rejection and a refile, which resets the clock.
• Weekend and holiday timing: Business days exclude weekends and federal holidays. A Friday filing with standard processing won't be ready until the following week.

The fix is simple: double-check every field before you hit submit. Montana's online form is short, and most rejections come from sloppy data entry.

How long until I can open a bank account?

As soon as your LLC is approved and you have your EIN, you can open a bank account. Most Montana banks and credit unions will schedule a same-day or next-day appointment. You will need:

• Your approved Articles of Organization (downloaded from the SOS portal)
• Your EIN confirmation letter (from irs.gov)
• Your government-issued photo ID
• An Operating Agreement (recommended but not always required by the bank)

Online-only banks like Mercury or Relay also work and often approve accounts within 1-2 business days. If you use a formation service like doola, they bundle the EIN and can help set up banking as part of their Starter plan ($297/year).

Comparison: How long does each route take?

Want the fastest path without doing it yourself? Start with doola and skip the paperwork.

Why is my Montana LLC filing taking so long?

If your filing has been pending for more than 7 business days under standard processing, something is likely wrong. Common causes:

• Name rejection: The state flagged your business name. Check your email for a rejection notice from the Secretary of State.
• Registered agent issue: The agent address was invalid or the agent did not consent. You will need to correct and resubmit.
• System backlog: Rare, but during peak filing periods (January-March), processing can stretch by a day or two. Montana does not publish real-time backlog data, so if you are past the stated window, contact the SOS directly at (406) 444-3665.

If you used a formation service, reach out to them first. They can see the filing status and help resolve rejections faster than waiting for the state to mail you a letter.

Do I need an Operating Agreement before the bank will open my account?

Montana does not require an Operating Agreement to form an LLC, and most banks will open your account without one. However, an Operating Agreement is a smart move. It defines how profits are split, who makes decisions, and what happens if a member leaves. You can draft one yourself for free, or ask your formation service to include it.

When is the Montana LLC considered officially "active"?

Your LLC becomes active the moment the Secretary of State approves your Articles of Organization. You can download the stamped document immediately. There is no separate activation step, no waiting period, and no additional filing required to start operating.

Quick recap: Montana LLC timeline

1. Day 0: File online, pay $35 (or add $20/$100 for priority/expedited).
2. Day 1-6: Standard approval. 24 hours with priority. 1 hour with expedited.
3. Day of approval: Download stamped Articles of Organization.
4. Same day: Apply for EIN at irs.gov. Issued immediately online. Free.
5. Same day or next business day: Open a bank account with Articles + EIN + photo ID.

That is the entire process. No mail. No waiting for physical documents. Montana keeps it simple, and the fastest path gets you from filing to bank account in under 24 hours.

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