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Short reply · Montana

3 Best Registered Agents in Montana (2026) and the Facts Behind Them

In Montana for 2026, rank registered agents Registered Agent MT.org ($99 a year), Mainstay Filing ($149 a year) and Montana Registered Agent.co ($99 a year). Agent prices start at $99 to $149 in year one and total $297 to $447 over three.

LLC Q and A editorial team ·

At a glance

Agent required?
Yes, by statute
Statute term
Registered agent
Agent price
$99 to $149 per year
Pick
Registered Agent MT.org, Mainstay Filing then Montana Registered Agent.co

Montana ranking

Prices come from each company's own page. See the method.
1#1 pick

1. Registered Agent MT.org: best for LLCs that stay put

Annual price $99, renewal price $99

#1 in Montana: Registered Agent MT.org, because $99 annually puts a street address on file.

Three years cost less here than at Mainstay Filing; cost carries the most weight.

Price covers

  • In-state address
  • Legal papers scanned online

For

  • Smaller annual price than our #1
  • $99/yr, flat at renewal

Against

  • Montana only
  • Annual report is on your list
Go to Registered Agent MT.orgPartner link. We may earn money if you buy.
2Nationwide

2. Mainstay Filing: best for one price in all states

Annual price $149, renewal price $149

Second: Mainstay Filing, because $149 a year travels with the company to a new state.

Ranked lower because three years cost $150 more than Registered Agent MT.org, and cost has the biggest weight.

Price covers

  • Street address in the state
  • Free scans: three government mailings per year
  • Not limited to LLCs: corporations, LPs, LLPs and nonprofits as well

For

  • $149 a year, no increase
  • Goes with the LLC to new states

Against

  • Costs $50 more a year than the local pick
  • Agent only; no report filing
Go to Mainstay FilingPartner link. We may earn money if you buy.
3Montana specialist

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

Annual price $99, renewal price $99

Why Montana Registered Agent.co is third: $99 annually puts a street address on file.

It charges exactly what Registered Agent MT.org charges.

Price covers

  • In-state address
  • Legal papers scanned online

For

  • $99/yr, flat at renewal
  • Smaller annual price than our #1

Against

  • Montana only
  • Annual report is on your list
Go to Montana Registered Agent.coPartner link. We may earn money if you buy.

Side by side

#CompanyFirst yearRenewal3-year costIncludes
1Registered Agent MT.org$99$99/yr$297In-state address; legal papers scanned onlineGo to Registered Agent MT.orgPartner link. We may earn money if you buy.
2Mainstay Filing$149$149/yr$447street address in the state; Free scans: three government mailings per year; Not limited to LLCs: corporations, LPs, LLPs and nonprofits as wellGo to Mainstay FilingPartner link. We may earn money if you buy.
3Montana Registered Agent.co$99$99/yr$297In-state address; legal papers scanned onlineGo to Montana Registered Agent.coPartner link. We may earn money if you buy.
Service fees only, from company price pages read November 13, 2026. State fees are identical for every pick.

Questions and replies

Must the LLC name a registered agent?

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

Law: Mont. Code Ann. § 35-7-105. mca.legmt.gov (October 2026) is the source of record

Who can be the 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 you can serve yourself at no cost.

What does an agent cost?

$99 to $149 a year with our picks; $297 to $447 over three years.

Any agent, same state fees.

What does an agent do?

Accepts lawsuits and official mail for the LLC at a Montana address.

Prompt forwarding matters more than anything else about an agent. Service of process, defined

What does the state bill each year?

Annual report: every year, $20. For timing, the state's own calendar reads: April 15, so plan ahead of it.

sosmt.gov (October 2026) is the source of record

Why this order?

Winning criterion for Registered Agent MT.org: three-year price, weighted 36%.

Five criteria: three-year price (36%), chores removed from your list (26%), price shown up front (15%), year-two bill (12%) and states served (11%).

Registered Agent MT.org: $297 for three years, $150 below Mainstay Filing.

The five criteria

What Montana requires of an agent

ItemDetailSource
LLC filing fee$35sosmt.gov (October 2026) is the source of record
Registered agentYes, by statutemca.legmt.gov (October 2026) is the source of record
Annual report$20 every yearsosmt.gov (October 2026) is the source of record
Three-year state total$75Total of the rows above
The last row adds the filing, two reports and any minimum tax. Variable costs are explained in the text and left out of the sum.

More replies

Can I be my own agent?

Yes, if you meet the state's rules on who may serve and the address, shown above.

What address counts?

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

Three-year cost of each?

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

Where do the numbers come from?

State fees come from Montana's official documents. Service prices come from each company's price page. Both are dated here.

Do I have to hire one?

Not required. The state takes filings from owners.

Which registered agent should I use in Montana?

Registered Agent MT.org, because a Montana-only company pays $297 for three years. Then Mainstay Filing and Montana Registered Agent.co.

Source list

  1. Reference line for Montana Secretary of State fee, drawn from sosmt.gov and confirmed October 2026, as noted by our editors
  2. Reference line for Montana yearly filing: Annual report, drawn from sosmt.gov and confirmed October 2026, as noted by our editors
  3. Reference line for Montana yearly filing: Annual report, drawn from sosmt.gov and confirmed October 2026, as noted by our editors
  4. Reference line for Montana report due date, drawn from mca.legmt.gov and confirmed August 2026, as noted by our editors
  5. Reference line for Mont, drawn from mca.legmt.gov and confirmed August 2026, as noted by our editors
  6. Reference line for Montana formation fee: Filing fee, drawn from sosmt.gov and confirmed October 2026, as noted by our editors
  7. Reference line for Montana registered agent statute, drawn from mca.legmt.gov and confirmed October 2026, as noted by our editors
  8. Price page: Registered Agent MT.org pricing page, accessed November 13, 2026
  9. Price page: Mainstay Filing Montana service page, accessed November 13, 2026
  10. Price page: Montana Registered Agent.co pricing page, accessed November 13, 2026