Rank1
Top pick on this page
1. Registered Agent MT.org: best for the smallest yearly fee on this list
$99 yearly, unchanged
Editor score9.6out of 10
Registered Agent MT.org takes the top spot because it charges $99 a year, the same at renewal, the smallest yearly price on this list.
With Registered Agent MT.org the company gets an in-state street address for its registered office, and served papers are scanned to your online account.
It comes in below Mainstay Filing over three years.
In the price
- The physical in-state address the state asks for
- Anything served on the company is scanned and posted to your account
Good
- Formation comes with a free first agent year
- $99 per year, flat across renewals
- A lower yearly price than Mainstay Filing
Watch for
- You handle the annual report yourself
- Made for Montana; another state needs a different agent
Montana Registered Agent.co makes the list at number two because it charges $99 a year, the same at renewal, the smallest yearly price on this list.
Montana Registered Agent.co gives the company a street address in the state and scans whatever is served there into your account.
We found no difference in price or features between Registered Agent MT.org and Montana Registered Agent.co; choose whichever you prefer.
In the price
- The physical in-state address the state asks for
- Anything served on the company is scanned and posted to your account
Good
- LLC formation available with a free first agent year
- Costs $99 a year, renewal included at the same price
- A lower yearly price than Mainstay Filing
Watch for
- You handle the annual report yourself
- Made for Montana; another state needs a different agent
Rank3
One agent, every state
3. Mainstay Filing: best for all fifty states
$149 yearly, unchanged
Editor score9.1out of 10
Mainstay Filing makes the list at number three because the price is $149 a year whether you stay in one state or add more, with three government letters a year scanned at no charge.
Starting from scratch? The formation package is $199 a year and adds the Montana filing and the annual report.
Registered Agent MT.org undercuts it by $150 across three years, which leaves Mainstay Filing second on cost.
In the price
- A registered office street address in whichever state you need
- Legal papers served on the company scanned and uploaded the same business day at no charge
- Three government letters a year scanned free
- Compliance reminders
Good
- Papers served on the company are scanned the same business day at no charge
- Takes LLCs, corporations, LPs, LLPs and nonprofits
- Free scans of three government letters each year
- $149 a year, and it holds at renewal
Watch for
- The agent alone is $50 a year more than Registered Agent MT.org
- Unless you buy the formation package, the annual report is yours to file
The 3 picks side by side
The 10-point scores come from Filing Shortlist's editors and the criteria on How we rank. They are not customer ratings.
Montana registered agent pricing in 2026: first year, renewals, three-year total
Every price comes from the company's own pages as of November 12, 2026. Montana's own fees stay the same whichever agent you pick.
What decided the order
Three-year price separated the picks in Montana. The method gives three-year price 28%, gives what the price covers 28% and splits 44% over renewal terms, fit for the state and price clarity.
Registered Agent MT.org adds up to $297 over three years, which is $150 below Mainstay Filing. A company with a Montana agent need gains little from fifty-state reach, so the smaller yearly price settled it.
Every criterion and weight is set out on How we rank.
Montana registered agent rules from Montana Secretary of State
Every LLC must name a registered agent with an in-state street address. The address has to be an actual street address or rural route box number in Montana. A P.O. box alone is not enough. Statute: Mont. Code Ann. § 35-7-105.
The Montana annual report: price and deadline
Every company formed here files the annual report every year. The state charges $20 and wants it April 15. Being late adds $15. The reminders about it go to your registered agent.
Common questions about Montana registered agents
Does the company need to name a registered agent in Montana?
It does. Montana wants each LLC to name a registered agent with a street address inside the state, and that name stays on the public record.
How much do agents in Montana charge per year?
Yearly prices span $99 to $149, and each company holds its price at renewal.
Can the owner be the registered agent?
Yes, if you meet the state's conditions. A commercial registered agent listed with the Secretary of State, or a noncommercial agent: an individual, including an owner, or an entity in Montana.
By what date is the Montana annual report due?
The deadline is April 15, and the state charges $20. A late filing adds $15.
Which registered agents made this shortlist?
Registered Agent MT.org ($99 a year), Montana Registered Agent.co ($99 a year) and Mainstay Filing ($149 a year), listed from the top pick down.
Which Montana registered agent makes the shortlist first?
Registered Agent MT.org, because it is built for Montana companies, at $99 a year with an in-state street address as the registered office.