No.1
Top pick on this page
1. Montana Registered Agent.co: best for the least expensive year among these agents
$99 yearly, no change
Score9.1out of 10
First place: Montana Registered Agent.co. It charges $99 a year, holding that price at renewal, the lowest yearly charge on this list.
Montana Registered Agent.co provides the in-state registered office and posts scans of any legal papers served there to your account.
Over three years it costs less than Mainstay Filing, and cost is one of our two most heavily weighted criteria.
In the price
- An in-state registered office address
- Anything served on the company is scanned and made available online
Why pick it
- LLC formation offered, year-one agent service included
- Costs $99 yearly, unchanged at renewal
- A lower yearly charge than Mainstay Filing
Weak spots
- The annual report is yours to file
- Built for Montana; elsewhere you need another agent
No.2
Best value here
2. Registered Agent MT.org: best for Montana specialists
$99 yearly, no change
Score8.9out of 10
Second place: Registered Agent MT.org. It charges $99 a year, holding that price at renewal, the lowest yearly charge on this list.
Under this plan Registered Agent MT.org stands as the company's registered office with a state street address, and served papers reach you as online scans.
The published prices and features of Montana Registered Agent.co and Registered Agent MT.org are identical, which makes the order between them close.
In the price
- An in-state registered office address
- Anything served on the company is scanned and made available online
Why pick it
- Offers formation with a free first agent year
- $99 annually, flat across renewals
- A lower yearly charge than Mainstay Filing
Weak spots
- The annual report is yours to file
- Built for Montana; elsewhere you need another agent
No.3
Best all-in coverage
3. Mainstay Filing: best for all fifty states
$149 yearly, no change
Score8.8out of 10
Third place: Mainstay Filing. Its agent plan is $149 a year and does not rise at renewal, and legal papers served on the company are scanned within the same business day free of charge.
For a company not yet formed, the $199 yearly package adds the Montana filing and the annual report.
Montana Registered Agent.co costs $150 less over three years, and Mainstay Filing trails it on that criterion.
In the price
- A physical registered office address inside the state
- Free same-business-day scans of anything served on the company
- No fee to scan your first three government mailings annually
- Compliance reminders
Why pick it
- Service of process on the company scanned within the same business day, no charge
- Accepts LLCs, corporations, LPs, LLPs and nonprofits
- $149 a year, unchanged at renewal
- Three government letters a year scanned at no charge
Weak spots
- The agent plan runs $50 a year above Montana Registered Agent.co
- Unless you buy the formation package, you file the annual report
The 3 rulings in brief
| Rank | Provider | Ruling score | Yearly charge | Renewal | Suited to | Link |
|---|
| 1 | Montana Registered Agent.co | 9.1 | $99 | $99/yr | The lowest yearly charge on this list | Visit Montana Registered Agent.coPartner link. We may earn money if you buy. |
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| 2 | Registered Agent MT.org | 8.9 | $99 | $99/yr | The lowest yearly charge on this list | Visit Registered Agent MT.orgPartner link. We may earn money if you buy. |
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| 3 | Mainstay Filing | 8.8 | $149 | $149/yr | An agent usable in all fifty states | Visit Mainstay FilingPartner link. We may earn money if you buy. |
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The 10-point scores are editorial. They apply the criteria on
How we rank and do not draw on customer ratings.
Montana registered agent charges in 2026: year one, renewals and the three-year total
| Provider | Year one | Year two | Year three | Total over three years | Price unchanged at renewal |
|---|
| Montana Registered Agent.co | $99 | $99 | $99 | $297 | Yes |
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| Registered Agent MT.org | $99 | $99 | $99 | $297 | Yes |
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| Mainstay Filing | $149 | $149 | $149 | $447 | Yes |
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Each charge was taken from the provider's own pages on November 12, 2026. Montana's own fees are the same whichever agent is chosen.
What decided the order
The decisive criterion in Montana was charge over three years. For reference, the method assigns 31% to charge over three years, 31% to work taken off the founder and 38% across renewal conduct, fit with local rules and pricing in plain sight.
Over three years Montana Registered Agent.co totals $297, $150 less than Mainstay Filing. A company that needs an agent only in Montana gains little from fifty-state reach, so the lower yearly charge carried the ruling.
Each criterion and its weight appear on How we rank.
What Montana requires of a registered agent (source: 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. Authority: Mont. Code Ann. § 35-7-105.
The Montana annual report: its fee and due date
In Montana, the annual report comes due every year. $20 is payable to the state, and the deadline is April 15. Filing late adds $15. Notices about it are sent to your registered agent.
Questions on Montana registered agents
Is a Montana LLC obliged to appoint a registered agent?
Yes. Montana law expects every LLC to appoint a registered agent with a physical address in the state, and that appointment is public.
What is the going yearly rate for a Montana registered agent?
Yearly charges fall between $99 to $149, and every provider holds its price at renewal.
Is the owner permitted to serve as the registered agent?
Yes, when the state's conditions are met. A commercial registered agent listed with the Secretary of State, or a noncommercial agent: an individual, including an owner, or an entity in Montana.
What is the deadline for the Montana annual report?
$20 goes to the state, and the filing falls due April 15. Lateness costs $15 more.
Which registered agents were heard in this ranking?
Montana Registered Agent.co ($99 a year), Registered Agent MT.org ($99 a year) and Mainstay Filing ($149 a year), ruled upon in that order.
Which Montana registered agent does the record favor?
Montana Registered Agent.co, since it concentrates on Montana at $99 a year and supplies an in-state street address for the registered office.
The record
- Montana Secretary of State fee page and fee sheet: standard annual report fee, on the record as of October 2026
- Montana yearly filing: Annual report: fee, official source, on the record as of October 2026
- Montana yearly filing: Annual report: fee, official source, on the record as of October 2026
- Montana report due date, on the record as of August 2026
- Mont. Code Ann. § 35-8-201, on the record as of August 2026
- Montana formation fee: Filing fee, official source, on the record as of October 2026
- Montana registered agent statute, on the record as of October 2026
- Exhibit: Montana Registered Agent.co, pricing and service pages, November 12, 2026
- Exhibit: Registered Agent MT.org, pricing and service pages, November 12, 2026
- Exhibit: Mainstay Filing, Montana service page, November 12, 2026