Place1
Best hereRegistered Agent MT.org
1. Registered Agent MT.org: best for Montana LLCs that file their own reports
$199 up front, $99 a year from year two
Our mark9.5out of 10
Registered Agent MT.org takes the top spot: a $199 formation fee over the state's own, then $99 a year for the agent.
It provides the in-state registered office address and posts scans of served legal papers online.
Its prices do not include the annual report; you file that yourself every year.
It beats Mainstay Filing on three-year cost, the heaviest criterion we score, and matches it on renewal terms.
What you get
- The formation filing
- First year of registered agent service
Why pick it
- First year of registered agent service included
- Agent renews at $99
- $199 + state fee
Less good
- You file the annual report
- EIN help is $99
Place2
Best for a Montana-only companyMontana Registered Agent.co
2. Montana Registered Agent.co: best for Montana-only LLCs
$199 up front, $99 a year from year two
Our mark9.2out of 10
In second place, Montana Registered Agent.co: a $199 formation fee over the state's own, then $99 a year for the agent.
It provides the in-state registered office address and posts scans of served legal papers online.
Its prices do not include the annual report; you file that yourself every year.
Same prices and features as Registered Agent MT.org; pick whichever you prefer.
What you get
- The formation filing
- First year of registered agent service
Why pick it
- First year of registered agent service included
- Agent renews at $99
- $199 + state fee
Less good
- You file the annual report
- EIN help is $99
Place3
Report filing includedMainstay Filing
3. Mainstay Filing: best for formation, agent and annual report in one price
$199 a year plus the state fee; $234 due today
Our mark9.0out of 10
Third: Mainstay Filing, for it prepares the Montana filing, serves as your registered agent and files your annual report for $199 a year, the same at renewal.
Mainstay files Montana's annual report for you as part of the renewal; the state charges $20 every year and adds $15 when it is late, passed through at cost.
Registered Agent MT.org undercuts it by $200 over three years, and cost is our heaviest criterion.
What you get
- Formation prepared and filed
- Your registered agent, all year
- Your annual report prepared and filed
- EIN application
Why pick it
- Single $199 yearly price
- No renewal increase ($199)
- EIN application included
- No markup on the Montana fee
Less good
- Higher renewal than Registered Agent MT.org (by $100)
Shortlist at a glance
| Rank | Service | Our score | Service fee | Year two | Best for | Link |
|---|
| 1 | Registered Agent MT.org | 9.5 | $199 | $99/yr | A Montana-only LLC on a budget | Visit Registered Agent MT.orgPartner link. We may earn money if you buy. |
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| 2 | Montana Registered Agent.co | 9.2 | $199 | $99/yr | A Montana-only LLC on a budget | Visit Montana Registered Agent.coPartner link. We may earn money if you buy. |
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| 3 | Mainstay Filing | 9.0 | $199 | $199/yr | Formation, agent and annual report in one price | Visit Mainstay FilingPartner link. We may earn money if you buy. |
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The Founders Review sets these scores itself from the five criteria on our method page; they are not user ratings.
Montana LLC service cost over three years (2026)
| Service | Year one | Year two | Year three | Three-year total | Annual report filed for you |
|---|
| Registered Agent MT.org | $199 | $99 | $99 | $397 | No |
|---|
| Montana Registered Agent.co | $199 | $99 | $99 | $397 | No |
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| Mainstay Filing | $199 | $199 | $199 | $597 | Yes |
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We read these prices on the companies' own sites on November 12, 2026. Every service adds Montana's $35 fee, so it is left out above.
How the order was decided
Three-year cost decided this page. It is one of our two 30% criteria, alongside what one price covers.
Three-year cost: $397 with Registered Agent MT.org, saving $200 against Mainstay Filing. The annual report filing Mainstay adds was not worth the extra cost on our method.
Read the full criteria on our How we rank page.
What forming an LLC in Montana costs (2026)
The Montana Secretary of State charges $35 for the Articles of Organization (Mont. Code Ann. § 35-8-201), on top of any service fee.
Yearly upkeep and your agent
A $20 annual report is due every year by April 15. Late filings cost $15. Every LLC must name a registered agent with an in-state street address.
Common Montana questions
How much does it cost to form an LLC in Montana?
Budget $35 for the state and $199 for the service.
What form creates the LLC?
The Articles of Organization, filed with the Montana Secretary of State.
Do I need a registered agent for a Montana LLC?
Every LLC must name a registered agent with an in-state street address.
What yearly filings does a Montana LLC have?
The annual report, every year, due April 15, with a $20 state fee.
Is the EIN application included?
Mainstay Filing's yearly price includes it. Registered Agent MT.org and Montana Registered Agent.co charge $99 for it. The IRS itself charges no fee for an EIN.
Which LLC service is best in Montana?
Registered Agent MT.org ranks first on our method: Montana formation at $199 plus state fees, with a $99 agent renewal.
Sources and dates
- sosmt.gov/business/fees (Montana Secretary of State fee page and fee sheet: standard annual report fee), last confirmed October 2026
- sosmt.gov/secretary-christi-jacobsen-continues-montana-business-suppor (Montana yearly filing: Annual report: fee, official source), last confirmed October 2026
- sosmt.gov/secretary-christi-jacobsen-warns-montana-businesses-of-misle (Montana yearly filing: Annual report: fee, official source), last confirmed October 2026
- mca.legmt.gov/bills/mca/title_0350/chapter_0080/part_0020/section_0080 (Montana report due date), last confirmed August 2026
- mca.legmt.gov/bills/mca/title_0350/chapter_0080/part_0020/section_0010 (Mont. Code Ann. § 35-8-201), last confirmed August 2026
- sosmt.gov/wp-content/uploads/business_filing_fees.pdf (Montana formation fee: Filing fee, official source), last confirmed October 2026
- mca.legmt.gov/bills/mca/title_0350/chapter_0070/part_0010/sections_ind (Montana registered agent statute), last confirmed October 2026
- Read November 12, 2026: Registered Agent MT.org pricing and service pages
- Read November 12, 2026: Montana Registered Agent.co pricing and service pages
- Read November 12, 2026: Mainstay Filing Montana service page