LLC Review Desk's 2026 picks for LLC services in Montana, favorite first, are Mainstay Filing ($199), Montana Registered Agent.co ($199) and Registered Agent MT.org ($199). Mainstay Filing is our favorite, because for one yearly price of $199 you get the Montana filing, registered agent service and the annual report, then $199 at renewal.
By the LLC Review Desk editorial team
Position 1
Our top pick in Montana
1. Mainstay Filing: best for formation, agent and annual report in one simple price
$199 a year, and the state fee goes on top ($234 at checkout)
Our score
9.2out of 10
9.2 out of 10
Our favorite is Mainstay Filing, because the Montana formation, your registered agent and the annual report all come in a single $199 price.
When your plan renews, Mainstay files the annual report for you. Montana charges $20 every year for it, and the date is April 15, and a late one costs $15 more. Mainstay passes the state's fee along at cost.
Over three years it costs $200 more than Montana Registered Agent.co, and for us the extra things it handles are worth that.
In the price
Your formation filing, taken care of
Registered agent service for the whole year
Your annual report, prepared and filed for you
Your EIN application, taken care of
What we like
The EIN application is included
Montana's fee is passed through at cost
One yearly price of $199 that includes the annual report
Renews at $199, no add-ons
Trade-offs
After year one, its agent costs $100 a year more than Montana Registered Agent.co's
The 10-point scores are ours. They come from the criteria on How we rank and don't use customer ratings.
What Montana LLC services cost in 2026: year one, renewals and three years
Service
First year
Second year
Third year
Three-year total
Handles the annual report too
Mainstay Filing
$199
$199
$199
$597
Yes
Montana Registered Agent.co
$199
$99
$99
$397
No
Registered Agent MT.org
$199
$99
$99
$397
No
We took each price from the company's own pages on November 12, 2026. On top of every row, Montana charges a $35 filing fee, which isn't in these totals.
How the order came together
In Montana, filings in the price decided the order. If you're curious about the weights, three-year cost is 29%, filings in the price is 29% and renewal price, state fit and up-front totals share 42%.
In Montana you'll need a report each year ($20 to the state), and sending it late adds $15. Mainstay's price includes that filing and Montana Registered Agent.co's doesn't, which is why coverage beat Montana Registered Agent.co's lower three-year cost.
You can read every criterion and weight on How we rank.
The Montana LLC filing fee and form, from the state
Heads up: the Montana Secretary of State takes $35 when you file the Articles of Organization. Every service below adds that fee at cost.
What a Montana LLC needs after it is formed
There's one recurring item: the annual report, every year, by April 15. The state asks for $20. A late filing adds $15. Every LLC must name a registered agent with an in-state street address.
Your questions about Montana LLC services
How much does forming an LLC in Montana set you back?
The state charges $35 to file, and services charge $199.
What paperwork makes the LLC official?
You send the Articles of Organization to the Montana Secretary of State.
Does the Montana formation form ask me to name a registered agent?
Yes. You list a registered agent when you file and keep one on record, using a street address in Montana.
Is there paperwork after the LLC is formed?
Yes, one item: the annual report. It comes every year, by April 15, and the state asks $20.
Is the EIN included in the price?
With Mainstay Filing, yes; it comes with the yearly price. Montana Registered Agent.co and Registered Agent MT.org tack on $99 for it. You can also ask the IRS for an EIN yourself, free of charge.
Who should I use to form my Montana LLC?
Mainstay Filing, because $199 a year covers the Montana formation, a year as your registered agent and the annual report, and it renews at $199.