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Straight talk · Montana

3 Best Registered Agents in Montana (2026): Our Honest Take

If you need registered agents in Montana in 2026, we'd go with Registered Agent MT.org ($99 a year), Mainstay Filing ($149 a year) and Montana Registered Agent.co ($99 a year), in that order. Year one costs $99 to $149; three years cost $297 to $447.
From the LLC Plainly editorial team

Quick take

Do you need one?
Yes, the law says so
State term
Registered agent
Price of a service
$99 to $149 a year
Our picks
Registered Agent MT.org, Mainstay Filing then Montana Registered Agent.co

Who we like in Montana

Prices come from each company's own pricing. Here's how we pick.
Number one

1. Registered Agent MT.org: best for one-state companies

Year one $99; each renewal $99

Number one is Registered Agent MT.org, since it's $99 a year, $99 once you renew, for an LLC that stays in Montana.

It's the cheaper of the two over three years, and cost is our first check.

Your money buys

  • An in-state street address
  • Your legal mail, scanned

The good

  • A smaller yearly bill than Mainstay Filing
  • Just $99 a year

Trade-offs

  • Works in Montana and nowhere else
  • You'd still be handling the annual report
All 50 states

2. Mainstay Filing: best for one price in every state

Year one $149; each renewal $149

Number 2 is Mainstay Filing: one account at $149 a year works in whichever state you register in.

Three years here cost $150 above Registered Agent MT.org.

Your money buys

  • A street address in the state
  • Free scans of three government mailings a year
  • Also covers corporations, LPs, LLPs and nonprofits

The good

  • Locked at $149 a year
  • Good wherever the LLC registers

Trade-offs

  • Registered Agent MT.org is $50 cheaper each year
  • You get an agent and nothing more
Local to Montana

3. Montana Registered Agent.co: best for another local choice

Year one $99; each renewal $99

Third place goes to Montana Registered Agent.co, where it's $99 a year, $99 once you renew, for an LLC that stays in Montana.

Its prices match Registered Agent MT.org exactly, so either one works.

Your money buys

  • An in-state street address
  • Your legal mail, scanned

The good

  • A smaller yearly bill than Mainstay Filing
  • Just $99 a year

Trade-offs

  • Works in Montana and nowhere else
  • You'd still be handling the annual report

The numbers side by side

#ServiceStart priceRenews atThree-year totalWhat you get
1Registered Agent MT.org$99$99/yr$297An in-state street address; your legal mail, scannedTake a look at Registered Agent MT.orgPartner link. We may earn money if you buy.
2Mainstay Filing$149$149/yr$447A street address in the state; free scans of three government mailings a year; Also covers corporations, LPs, LLPs and nonprofitsTake a look at Mainstay FilingPartner link. We may earn money if you buy.
3Montana Registered Agent.co$99$99/yr$297An in-state street address; your legal mail, scannedTake a look at Montana Registered Agent.coPartner link. We may earn money if you buy.
We read these prices on November 13, 2026. Three years means year one plus two renewals.

Questions and answers

Does my LLC need a registered agent here?

Every LLC must name a registered agent with an in-state street address.

The law behind it: Mont. Code Ann. § 35-7-105. mca.legmt.gov, last seen October 2026

Who can I name as my agent?

A commercial registered agent listed with the Secretary of State, or a noncommercial agent: an individual, including an owner, or an entity in Montana.

Qualify, and the job can be yours for free.

What should I budget for an agent?

$99 to $149 a year with the services we'd use, or $297 to $447 across three years.

Naming a different agent doesn't change any state fee.

What does the agent handle?

It collects lawsuits and official state mail for your LLC at an address in Montana.

What matters is that nothing important goes unnoticed while you're out. What being served means

What's due each year apart from the agent?

Put $20 aside every year for the annual report. The due date, per the state, is April 15; put it on your calendar.

sosmt.gov, last seen October 2026

What put number one on top?

It comes down to cost across three years, and Registered Agent MT.org is best at it.

We start with cost across three years, move to work taken off your hands, and finish with three smaller checks.

On cost, Registered Agent MT.org takes it at $297, a saving of $150 against Mainstay Filing.

Read the method

Montana checklist

ItemDetailsWhere we found it
Fee at filing$35sosmt.gov, last seen October 2026
Registered agentYes, the law says somca.legmt.gov, last seen October 2026
Annual report$20 every yearsosmt.gov, last seen October 2026
What the state gets in three years$75The rows above, added up
We add the formation filing, two later reports and any minimum tax to reach the three-year number. Costs that have no fixed price don't go in.

A few more

Is it okay to be my own agent?

Yes, if your address and status fit the state's rule.

What's the address requirement?

The address has to be an actual street address or rural route box number in Montana. A P.O. box alone is not enough.

What's each pick's bill across three years?

Registered Agent MT.org will cost you $297, Mainstay Filing will cost you $447, Montana Registered Agent.co will cost you $297

How official are these figures?

What the state charges comes from official Montana publications; what services charge comes from what they publish.

Do I need to hire a service?

It's your call. You can file on your own if you meet the rules on this page.

Who tops the list in Montana?

Registered Agent MT.org comes first: $99 a year gets you an agent right in the state. Then come Mainstay Filing and Montana Registered Agent.co.

What we used for this page

  1. Montana Secretary of State fee, sosmt.gov (confirmed October 2026)
  2. Montana yearly filing: Annual report, sosmt.gov (confirmed October 2026)
  3. Montana yearly filing: Annual report, sosmt.gov (confirmed October 2026)
  4. Montana report due date, mca.legmt.gov (confirmed August 2026)
  5. Mont, mca.legmt.gov (confirmed August 2026)
  6. Montana formation fee: Filing fee, sosmt.gov (confirmed October 2026)
  7. Montana registered agent statute, mca.legmt.gov (confirmed October 2026)
  8. We read the Registered Agent MT.org pricing page on November 13, 2026
  9. We read the Mainstay Filing Montana service page on November 13, 2026
  10. We read the Montana Registered Agent.co pricing page on November 13, 2026