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What a registered agent costs by state / Montana

3 Best Registered Agents in Montana (2026): What You Pay

When you shop for registered agents in Montana for 2026, the order to follow is Registered Agent MT.org ($99/yr), Mainstay Filing ($149/yr) and Montana Registered Agent.co ($99/yr). A registered agent will charge you $99 to $149 to start, adding up to $297 to $447 over three years.
Written by the Price Your LLC editorial team

↓ Ranked for you by: What you spend over three years counts 38%, and how much work the price takes off you counts 31%. Renewal change, break-even and price visibility make up the rest. How we rank

What to expect

Is it required? Yes mca.legmt.gov (we looked on October 2026, so you can too)
First-year prices $99 to $149 Cost of one agent year
What three years cost you $297 to $447 Year one plus two renewals
Annual report $20 a year sosmt.gov (we looked on October 2026, so you can too)
When one overtakes another Does not happen No service overtakes another

Ranked for you

Options sit in value order, with prices taken from company pages. State fees are the same whoever serves as agent.

1
Ranks first

1. Registered Agent MT.org: best for the smallest yearly bill

Starts at $99 and renews at $99
You pay in year 1 $99
You pay at renewal $99/yr
You pay over 3 years $297

Registered Agent MT.org ranks first. $99 a year and $99 at renewal, meant for an LLC that stays in one state.

A lower three-year bill than Mainstay Filing puts it first, since cost weighs most.

Your price covers

  • A physical in-state office
  • Served papers appear in your login

What you get

  • Constant $99 per year
  • Costs you less than Mainstay Filing each year

What to watch

  • Montana only
  • Does not cover the annual report
2
All fifty states

2. Mainstay Filing: best for owners who may expand

Starts at $149 and renews at $149
You pay in year 1 $149
You pay at renewal $149/yr
You pay over 3 years $447

Next, Mainstay Filing: $149 a year, $149 at renewal, and one account for every state.

Its three-year price is $150 above Registered Agent MT.org's, and cost is 38% of the ranking.

Your price covers

  • A physical address on file
  • Up to three government mailings a year, scanned for you free
  • Covers LLCs, corporations, LPs, LLPs and nonprofits

What you get

  • One account for any state
  • $149 a year, no change at renewal

What to watch

  • A yearly difference of $50
  • Agent service only, reports stay with you
3
Montana focus

3. Montana Registered Agent.co: best for keeping your agent in state

Starts at $99 and renews at $99
You pay in year 1 $99
You pay at renewal $99/yr
You pay over 3 years $297

Spot 3 goes to Montana Registered Agent.co: $99 a year and $99 at renewal, meant for an LLC that stays in one state.

Its prices match Registered Agent MT.org's exactly.

Your price covers

  • A physical in-state office
  • Served papers appear in your login

What you get

  • Costs you less than Mainstay Filing each year
  • Constant $99 per year

What to watch

  • Montana only
  • Does not cover the annual report

Costs over time

Pick Service You pay in year 1 You pay by year 2 You pay by year 3 You pay by year 5
1 Registered Agent MT.org $99 $198 $297 $495 Price out Registered Agent MT.org Partner link. We may earn money if you buy.
2 Mainstay Filing $149 $298 $447 $745 Price out Mainstay Filing Partner link. We may earn money if you buy.
3 Montana Registered Agent.co $99 $198 $297 $495 Price out Montana Registered Agent.co Partner link. We may earn money if you buy.

Company prices from November 13, 2026, added up for you year by year. No break-even shows up inside ten years.

Your budget calculator

Tell us how many years you plan to keep the LLC and each service's running total updates.

Over 3 years: Registered Agent MT.org $297, Mainstay Filing $447, Montana Registered Agent.co $297. Lowest of the totals: Registered Agent MT.org.

Montana fee list

What you pay for Amount Source
Formation charge $35 sosmt.gov (we looked on October 2026, so you can too)
Annual report $20 every year sosmt.gov (we looked on October 2026, so you can too)
Late fee $15 sosmt.gov (we looked on October 2026, so you can too)
State fees summed, years 1 to 3 $75 Added up from the lines above

To find what you owe the state across three years, add the filing fee, two later reports and any minimum tax. We mention open-ended costs without putting a number on them.

Why this order for Montana

Your three-year spend put Registered Agent MT.org first. That factor is 38% of the ranking, and upkeep the price covers, year-two surprise, where the bills cross and price you can see make up the remainder.

Three years with Registered Agent MT.org add up to $297, saving you $150 over Mainstay Filing.

What Montana requires of your registered agent (Montana Secretary of State)

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

A commercial registered agent listed with the Secretary of State, or a noncommercial agent: an individual, including an owner, or an entity in Montana. Statute behind it: Mont. Code Ann. § 35-7-105.

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

As written: mca.legmt.gov (we looked on October 2026, so you can too)

Doing it alone

Qualifying owners pay nothing extra to go without a service. The prices above, $99 to $149 a year, buy you convenience.

About these prices

How much will a Montana registered agent cost me per year?

Plan on $99 to $149 a year.

What do three years of agent service cost?

Year one plus two renewals comes to $297 to $447.

Do I have to have a registered agent for a Montana LLC?

Yes, you do. Every LLC must name a registered agent with an in-state street address.

Can I be my own registered agent?

If you qualify, yes; the requirements section has the rules.

What will the state charge my LLC each year?

You pay $20 each year for the annual report; the state sets the deadline at April 15.

When does one service end up costing more than another?

Not within ten years: the order of the totals stays the same.

Which registered agent is the best value for me in Montana?

Start with Registered Agent MT.org, then Mainstay Filing, then Montana Registered Agent.co.

Where to go next

What a registered agent costs by state for all 50 states Best registered agents for anyone How we rank your options

Where we looked

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