Plain answers · Missouri

3 Best Registered Agents in Missouri (2026), Plainly Answered

We'd pick MO Registered Agent.org ($99 a year), Missouri Registered Agent.co ($99 a year) and Mainstay Filing ($149 a year) in Missouri for 2026, in that order. Three years of agent service add up to $297 to $447, starting at $99 to $149.

By the Plain Charter editorial team · Reviewed and updated November 12, 2026

Short version

Do you need one?: Required
Called: Registered agent
What a service costs: $99 to $149 each year
Best picks: MO Registered Agent.org, Missouri Registered Agent.co then Mainstay Filing

Missouri: our picks

Ranked by how we choose: three-year cost first, then what the price covers.

1Best overall

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

First year $99, then $99 a year

First choice: MO Registered Agent.org. The reason is simple: the plan is $99 a year for one state, renewing at $99.

Over three years it costs less than Mainstay Filing, and cost is the biggest factor in our order.

The price covers

Registered office address
Legal papers scanned to your account

Upsides

$99 a year, no increase
Smaller yearly bill than Mainstay Filing

What to weigh

No coverage outside the state

Visit MO Registered Agent.orgPartner link. We may earn money if you buy.

2Missouri specialist

2. Missouri Registered Agent.co: best for a second in-state choice

First year $99, then $99 a year

Pick number 2, Missouri Registered Agent.co, makes the list because the plan is $99 a year for one state, renewing at $99.

It charges the same as MO Registered Agent.org; the order between them is a close call.

The price covers

Registered office address
Legal papers scanned to your account

Upsides

Smaller yearly bill than Mainstay Filing
$99 a year, no increase

What to weigh

No coverage outside the state

Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.

3Bundled

3. Mainstay Filing: best for owners planning to grow

First year $149, then $149 a year

Our number 3 is Mainstay Filing, since the price is $149 a year wherever the LLC is on file.

It costs $150 more than MO Registered Agent.org over three years, and cost carries the most weight with us.

The price covers

A physical address on file
Three government mailings a year scanned free
Covers LLCs, corporations, LPs, LLPs and nonprofits

Upsides

Covers every state
Annual price $149, renewal price $149

What to weigh

Costs $50 more each year
Does not file the yearly report

Visit Mainstay FilingPartner link. We may earn money if you buy.

Side-by-side prices

#	Service	First year	Later years	Over three years	What it covers
1	MO Registered Agent.org	$99	$99/yr	$297	registered office address; legal papers scanned to your account	Visit MO Registered Agent.orgPartner link. We may earn money if you buy.
2	Missouri Registered Agent.co	$99	$99/yr	$297	registered office address; legal papers scanned to your account	Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.
3	Mainstay Filing	$149	$149/yr	$447	A physical address on file; three government mailings a year scanned free; Covers LLCs, corporations, LPs, LLPs and nonprofits	Visit Mainstay FilingPartner link. We may earn money if you buy.

Company prices on November 12, 2026, before state fees.

Common questions

Is a registered agent required?

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

Statute: RSMo 347.030. October 2026 · revisor.mo.gov

Who is allowed to be the agent?

A Missouri resident, or a corporation authorized in Missouri, whose business office is the registered office.

If you meet that rule, you can name yourself and pay no agent fee.

What does an agent cost?

$99 to $149 yearly. Over three years, $297 to $447.

The agent you pick does not change any state fee.

What is the agent's job?

It accepts court papers and state mail for your LLC at an address in Missouri.

That is why the address must be staffed in business hours. Service of process in plain words

Are there yearly state fees?

No report is due.

How was the order decided?

Because of three-year cost: MO Registered Agent.org does best there, and it counts for 35%.

What we weigh most: three-year cost (35%) and what the price takes off your plate (30%). Three smaller criteria break close calls.

On cost, MO Registered Agent.org wins at $297 for three years, a $150 saving against Mainstay Filing.

See how we rank

Missouri rules at a glance

Requirement	Amount or rule	Source
Formation fee	$50	October 2026 · sos.mo.gov
Registered agent	Required	October 2026 · revisor.mo.gov
State fees, first three years	$50	Added up from the above

We add the filing, two years of reports and any minimum tax for the three-year line. Publication and other variable costs are excluded.

FAQ

Do I have to pay someone?

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

What kind of address is required?

The address has to be a physical street address in Missouri. A P.O. box can be listed only together with a street address.

Three years in, what has each cost?

MO Registered Agent.org $297, Missouri Registered Agent.co $297 and Mainstay Filing $447

What are the numbers based on?

Official schedules for state fees, company pricing for service fees, all dated on this page.

Do I need to hire a service?

No, you can file yourself if you meet the rules on this page.

What is the best registered agent for Missouri?

MO Registered Agent.org, because it charges $99 a year, $99 at renewal, for an LLC that stays in Missouri. Then Missouri Registered Agent.co and Mainstay Filing.

Sources for this page

RSMo 347.037, August 2026 (revisor.mo.gov)
Missouri formation fee: Filing fee, October 2026 (sos.mo.gov)
Missouri registered agent statute, October 2026 (revisor.mo.gov)
MO Registered Agent.org pricing page (prices on November 12, 2026)
Missouri Registered Agent.co pricing page (prices on November 12, 2026)
Mainstay Filing Missouri service page (prices on November 12, 2026)