Statutory requirements, filing fees, and recommended services for Montana businesses.
Verified against Montana Secretary of State · Updated 2026-04-30
Every Montana LLC, corporation, and registered foreign entity must keep a registered agent on file under Mont. Code §35-8-105. The Montana Secretary of State treats the agent’s address as the entity’s official address for legal mail. This page documents how Montana treats the registered agent designation under Mont. Code §35-8-105, the fees the Montana Secretary of State charges to file, and the practical mistakes that trip up first-time filers.
A Montana registered agent is the individual or business entity that Mont. Code §35-8-105 requires every LLC and corporation to maintain as the official recipient of service of process, state tax notices, and Montana Secretary of State correspondence. The agent must keep a physical Montana street address — P.O. boxes alone do not satisfy the statute — and must be reliably available during normal business hours. The Montana Secretary of State, Business Services Division files the agent’s name and street address as part of the public business record, searchable by any member of the public through the agency’s online entity database.
Five state-specific gotchas account for most of the registered agent problems we see in Montana filings.
Listing a P.O. box or commercial mailbox. Mont. Code §35-8-105 requires a physical street address, and the Montana Secretary of State returns filings that list anything other than a real Montana street. Commercial mailbox services without a registered street component (typical UPS Store-style addresses) are routinely rejected.
Using a non-Montana address. The agent’s address must be physically inside Montana. Out-of-state owners cannot list their own home address; they must either hire a commercial agent or designate a Montana-resident individual.
Letting the agent designation lapse without filing a Statement of Change. When a commercial agent service is terminated and a replacement is not filed with the Montana Secretary of State, the LLC enters a compliance gap. The $15 change fee is trivial compared with the cost of administrative dissolution and reinstatement.
Missing the annual report deadline. Montana’s annual report is due annually by April 15, and the registered agent is the only party who receives mailed reminders from the Montana Secretary of State. If the agent is unreliable, the entity can miss the deadline silently.
Montana’s no-sales-tax appeal attracts out-of-state vehicle LLCs that often misunderstand nexus rules and trigger sales tax recovery actions in their home states.
The registered agent designation in Montana is filed as part of the Articles of Organization, submitted to the Montana Secretary of State’s business filings division. Most filers use the Montana Secretary of State ePass portal, which accepts the formation document, the agent designation, and the $35 filing fee in a single transaction. Online submissions typically clear in two to seven business days; paper filings can take two to four weeks depending on agency workload.
Montana’s $20 annual report is due April 15 every year, and Montana is one of the states with no state-level sales tax — making it a popular but legally complicated formation choice for out-of-state vehicle and luxury-asset registrations.
Once the entity is on file, the registered agent’s role continues for as long as the LLC or corporation exists. Montana’s ongoing maintenance is handled through an annual report at $20, due annually by April 15, and any subsequent change of registered agent is filed with the Montana Secretary of State via a Statement of Change at a $15 fee. The agent must file a written consent or, where the agency requires, sign the formation document itself — the Montana Secretary of State rejects designations that lack agent consent.
National registered agent services — Northwest Registered Agent, Mainstay Filing, ZenBusiness, and LegalZoom — operate in Montana with the same pricing and feature set they offer in every other state. For most Montana LLCs and corporations, a national provider is the right choice: consistent pricing, an online dashboard with scanned mail, and same-day acceptance of service of process. Northwest’s $125/year tier and Mainstay Filing’s $99/year tier are the two most common picks for Montana businesses that want privacy and reliability without paying premium prices.
A Montana-specific provider like Montana Registered Agent.co makes sense in narrower cases. State-focused agents tend to specialize in Montana filings only, which can mean faster local turnaround on Statements of Change, deeper familiarity with the Montana Secretary of State’s portal, and a single jurisdiction to worry about. For business owners who plan to operate exclusively in Montana and value a local-only operator, a state-specific provider is often a better cultural fit than a multi-state brand. The tradeoff is interface polish: state-specific services usually lack the dashboard depth and mail-forwarding automation of the national services.
| # | Service | Price/yr | Best for |
|---|---|---|---|
| 1 | Northwest Registered Agent | $125 | privacy-focused customers |
| 2 | Mainstay Filing Best Value | $99 | balanced value |
| 3 | ZenBusiness | $199 | new businesses bundling formation |
| 4 | LegalZoom | $249 | customers wanting brand-name support |
Montana-specific option: Montana Registered Agent.co operates exclusively in Montana and specializes in same-state filings. Best for businesses that want a state-focused provider with local-only operations.
| Physical address required | Yes — must be a street address in Montana |
|---|---|
| P.O. box allowed | No |
| Business hours availability | Required during normal business hours |
| Resident requirement | Montana resident OR authorized business entity |
| Listed in public record | Yes — searchable via Montana Secretary of State |
| Statute reference | Mont. Code §35-8-105 |
| Filing Type | Fee | Renewal | Renewal Fee |
|---|---|---|---|
| LLC formation (Articles of Organization) | $35 | annually by April 15 | $20 |
| DBA / Fictitious Name | $20 | Every 5 years | $20 |
| Registered Agent change | $15 | — | — |
| Annual Report | $20 | annually by April 15 | $20 |
Yes — if you are a Montana resident with a physical street address and are available during business hours.
Yes. Montana law requires every LLC to maintain a Montana-based registered agent regardless of where the owner lives.
The Montana Secretary of State can administratively dissolve your business after approximately 60 days of non-compliance.
Yes — file a Statement of Change of Registered Agent with the Montana Secretary of State for $15.
$50–$150 per year for commercial services; free if you self-serve.
Yes. The agent's name and address are searchable via the Montana Secretary of State business records.
Same-day with most commercial services; same-business-day filing if submitted online before the daily cutoff.
This page provides general information about Montana registered agent requirements, not legal advice. Filing fees and procedures may change; verify current details with the Montana Secretary of State before filing. We may receive compensation from services listed in our comparisons; this does not influence our editorial selections.