3 Best LLC Services in Montana (2026): Who to Ask First
In Montana for 2026, our answer on LLC formation services is Mainstay Filing ($199), Montana Registered Agent.co ($199) and Registered Agent MT.org ($199), ranked from first to last. Every option pays Montana $35 to file, then charges $397 to $597 for three years of service.
Answered by the Ask About LLC editorial team ·
Four quick answers
What does the state charge?
$35, one time
What comes after?
$20 each year
Registered agent
Yes, the law says so
Our pick
Mainstay Filing, Montana Registered Agent.co then Registered Agent MT.org
Prices as of November 13, 2026. The state's own fees are in the checklist below.
Questions owners ask
What will forming an LLC cost in this state?
$35 goes to the state. Hiring a service in year one adds $199.
Over three years the state collects $75, filing fee included. sosmt.gov, read in October 2026 for this answer
Which form do I file, and where does it go?
The Montana Secretary of State receives the Articles of Organization, and once it approves, the LLC exists.
Statute: Mont. Code Ann. § 35-8-201. sosmt.gov, read in October 2026 for this answer
Does this state require a registered agent?
Every LLC must name a registered agent with an in-state street address.
A commercial registered agent listed with the Secretary of State, or a noncommercial agent: an individual, including an owner, or an entity in Montana.
How was the bottom line figured? Add the filing fee, the next two reports and the minimum tax if the state has one. Anything with no fixed price, a newspaper notice for instance, is described above and kept out of the sum.
Questions people also ask
Is the EIN application included?
With Mainstay Filing it costs nothing extra. Montana Registered Agent.co charges $99, Registered Agent MT.org charges $99.
Is there a late fee?
A late report costs $15 more.
What do the picks cost over three years?
Mainstay Filing comes to $597; Montana Registered Agent.co comes to $397; Registered Agent MT.org comes to $397, before state fees.
Where do these numbers come from?
State fees come from Montana's official documents, and service fees come from each company's own pricing page. Both carry dates on this page.
Do I have to use a service?
Not at all. The state takes filings from owners directly. A service just saves you time, and it can double as your agent.
Who should I ask first about a LLC service in Montana?
Mainstay Filing comes first: for $199 a year the formation, the registered agent and the annual report are all taken care of. Next are Montana Registered Agent.co and Registered Agent MT.org.
Where did we look this up?
Ask-about note for Montana Secretary of State fee: the state publishes it at sosmt.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for Montana yearly filing: Annual report: the state publishes it at sosmt.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for Montana yearly filing: Annual report: the state publishes it at sosmt.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for Montana report due date: the state publishes it at mca.legmt.gov, confirmed August 2026, so you can look it up yourself
Ask-about note for Mont: the state publishes it at mca.legmt.gov, confirmed August 2026, so you can look it up yourself
Ask-about note for Montana formation fee: Filing fee: the state publishes it at sosmt.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for Montana registered agent statute: the state publishes it at mca.legmt.gov, confirmed October 2026, so you can look it up yourself
The Mainstay Filing Montana service page, as it stood on November 13, 2026
The Montana Registered Agent.co pricing page, as it stood on November 13, 2026
The Registered Agent MT.org pricing page, as it stood on November 13, 2026