3 Best LLC Services in Montana (2026): Prices Tracked
After this 2026 price pass on Montana LLC formation services, the order is Mainstay Filing ($199), Montana Registered Agent.co ($199) and Registered Agent MT.org ($199). Expect $397 to $597 in service fees by year three. The $35 owed to Montana does not depend on the provider.
Tracked by the Filing Price Watch editorial team
Ordered by:
Three-year cost counts for 37% and filings covered for 29%, with renewal movement, crossover year and price visibility making up the rest. How we track
Montana in numbers
Formation fee at the state office$35sosmt.gov (pulled October 2026, noted here)
Year-one prices$199Excludes government fees
Years 1 to 3 combined$397 to $597Year one and both renewals
State side, years 1 to 3$75Same whichever service you use
Cost lines meet inNo crossoverOrder holds through year 10
Montana watchlist
Service prices only. The $35 state fee applies to every service.
#Ordered byPrice in year 1Price at renewalThree-year spend
1
First place
1. Mainstay Filing: best for the most paperwork per dollar
$199 yearly and the $35 state fee
Price in year 1$199
Price after year 1$199/yr
Three-year spend$597
Mainstay Filing takes first place in Montana: it is the only price here that folds the annual report into $199 a year.
Montana Registered Agent.co is $200 lower by year three; the 29% weight on filings covered still puts this one first.
It files the annual report for you, and the $20 state fee is billed at cost.
Price covers
Formation paperwork done
Registered agent for the full year
Annual report, filed when it is due
EIN application, prepared for you
Government fee passed along unchanged
Holds up
No extra charge for the EIN application
Stays at $199
Price does not rise at renewal ($199)
Weak spots
After year one the gap to Montana Registered Agent.co is $100
2
One-state service
2. Montana Registered Agent.co: best for the lowest spend over three years
$199 for formation, $99 for the agent after that
Price in year 1$199
Price after year 1$99/yr
Three-year spend$397
Spot 2 goes to Montana Registered Agent.co: three years total $397 because renewal is only $99.
The annual report is not covered by its price.
Price covers
Formation handled for you
A year of agent service to begin with
Holds up
Starts at $199
Year-one agent covered
A small $99 renewal
Weak spots
Preparing the annual report remains your job
EIN application adds $99
3
One-state service
3. Registered Agent MT.org: best for a local formation service
$199 for formation, $99 for the agent after that
Price in year 1$199
Price after year 1$99/yr
Three-year spend$397
Spot 3 goes to Registered Agent MT.org: three years total $397 because renewal is only $99.
The annual report is not covered by its price.
Price for price, it matches Montana Registered Agent.co.
Each line above links to the state's own page. Summing them gives the three-year state figure, which covers filing, years two and three of reporting and a minimum tax where there is one.
The reasoning behind the order
Filings covered by the price gave Mainstay Filing the lead. It makes up 29% of the order, and tracked three-year cost, renewal movement, crossover year and price visibility cover the remainder.
Having the annual report filed for you counted for more than Montana Registered Agent.co's smaller three-year total.
Put the EIN application into the sum and the totals cross at year 2, when Mainstay Filing passes Montana Registered Agent.co.
Montana LLC filing fee and requirements, as written by the state
The Montana Secretary of State accepts the Articles of Organization with $35, under Mont. Code Ann. § 35-8-201. Every LLC must name a registered agent with an in-state street address.
Quoted: sosmt.gov (pulled October 2026, noted here)
The do-it-yourself total
Filing on your own costs $75 in state fees over three years. The $397 to $597 charged by services pays for not doing the forms.
About these prices
How much do LLC formation services cost in Montana?
$199 to the service and $35 to the state.
What do these services cost over three years?
Three years of service run $397 to $597.
What does Montana charge to file an LLC?
$35 paid to the state, through the Articles of Organization.
What does Montana charge every year once the LLC exists?
Annual report: $20 a year, and the deadline reads April 15.
Does the price include the EIN application?
It depends on the service: Mainstay Filing (included), Montana Registered Agent.co ($99) and Registered Agent MT.org ($99).
In what year does one service become pricier than another?
They do not cross within ten years, so no service overtakes another.
Which LLC formation service is the best value in Montana?
Mainstay Filing is first, Montana Registered Agent.co second, and Registered Agent MT.org third.