Montana LLC Annual Requirements and Ongoing Compliance

The single most important ongoing requirement for a Montana LLC is the annual report. Every LLC registered in Montana files one each year with the Secretary of State, and it is the filing that keeps your company in active, good standing.

What the annual report is

The report is a confirmation, not a financial statement. It updates or verifies the state's record of your registered agent, your principal and mailing addresses, and your management information. You are not reporting revenue, profit, expenses, or anything about your finances. It is a short, routine filing designed to keep the state's contact and status information for your LLC accurate.

When it is due

April 15, every year. The deadline is fixed, so it does not float with your formation date. Even an LLC formed late in the prior year files by the following April 15.

How to file

The annual report is filed online through the Secretary of State's business portal at biz.sosmt.gov, using your ePass Montana login. Because Montana's system is entirely online, there is no paper form to mail. You review the pre-populated information, make any needed updates, confirm, and submit.

The current fee waiver

Montana waived the annual report fee for on-time filers in 2026 and 2027, part of Secretary of State Christi Jacobsen's push to ease costs on small businesses. That means if you file by April 15 in those years, the report itself is free. The waiver only applies to on-time filers — miss the deadline and a late penalty applies regardless. The receipt reflects any applicable charge; you never need to compute it yourself.

The annual report is the headline obligation, but a Montana LLC in good standing also has to keep a few other things current between reports. None of these are burdensome; they just require attention when something changes.

Maintaining a valid registered agent

Your LLC must have a registered agent with a physical Montana street address at all times — not just at formation. The agent has to be available during business hours and must have consented to serve. If your agent moves, resigns, or you decide to switch, file a statement of change with the Secretary of State promptly. An LLC whose registered agent information is stale or invalid is technically out of compliance even if the annual report is filed on time.

Updating addresses and management

If your principal or mailing address changes, or your management structure shifts (say you move from member-managed to manager-managed), update the state's records. The annual report is the natural place to catch these, but if a change happens mid-year and matters for service or notices, do not wait — update it when it happens.

Keeping internal records

Montana does not require you to file your operating agreement, but you should keep it current internally along with records of membership, capital contributions, and major decisions. Good internal records reinforce the separation between you and the company, which is exactly what protects your liability shield if it is ever challenged.

Beyond the Secretary of State filings, a Montana LLC has tax and licensing obligations that run on their own calendars. These are separate from the annual report and easy to forget precisely because they are handled by different agencies.

Federal and state income tax

How your LLC is taxed depends on its structure and any election. A single-member LLC reports on the owner's Schedule C; a multi-member LLC files Form 1065 and issues K-1s; an LLC that elected S-corporation treatment files Form 1120-S. Montana has an individual income tax, and for a standard pass-through LLC the income flows to the members' personal Montana returns. There is no separate LLC franchise tax for a typical pass-through LLC. Deadlines follow the federal and state tax calendars, not April 15.

Sales and other state taxes

Montana famously has no general statewide sales tax, which simplifies things for many businesses. Depending on your industry, however, you may have other Montana Department of Revenue obligations — withholding if you have employees, or specific taxes tied to particular activities. Check with the Department of Revenue for what applies to your business.

Licenses and permits

Montana does not issue a single statewide general business license. Instead, licensing is industry-specific: many trades and professions are regulated by state boards, and some cities and counties require local business registrations or permits. These have their own renewal cycles and are entirely separate from your Secretary of State compliance.

Montana's compliance is forgiving in cost but firm in consequence. Understanding what happens when you fall behind is the best motivation to stay current.

Late annual report

Miss April 15 and a late penalty applies to the annual report — even in years when the on-time fee is waived. The report is still due; the waiver simply does not extend to late filers. Filing as soon as you realize you missed it limits the damage.

Involuntary dissolution

If the annual report goes unfiled long enough, the Secretary of State moves the LLC toward involuntary dissolution. A dissolved LLC loses its good standing, and its liability protection can be jeopardized because the entity is no longer in active existence. Contracts, bank relationships, and licenses tied to the entity can all be disrupted.

Reinstatement

Montana generally allows a dissolved LLC to be reinstated by bringing filings current and paying the required fees and penalties. Reinstatement is possible but more expensive and more disruptive than simply filing on time. There can also be a gap in good standing that complicates dealings during the lapse.

How Mainstay Filing keeps you compliant

We track your April 15 annual report deadline and can file it for you, so a missed reminder never quietly turns into a penalty or dissolution. As your registered agent, we keep a compliant Montana address on the public record and forward state notices promptly, so compliance mail actually reaches you. The goal is a Montana LLC that stays in good standing year after year without you having to watch the calendar.