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California shortlist · foreign registration

3 Best Foreign Registration Services in California (2026)

Filing Shortlist cut the California field of foreign registration services down to Mainstay Filing ($199), California Registered Agent.ai ($199) and CA Registered Agent.org ($199), in that order for 2026. Mainstay Filing is the first pick because it charges $199 on top of the state fee, serves as agent for service of process free for year one and prices every state the same.

From the Filing Shortlist editorial team

Rank1

Our top pick

1. Mainstay Filing: best for companies that work in more than one state

Service charge $199 ($269 due at checkout with the state fee); agent service costs $149 annually after year one

Editor score9.5out of 10

Mainstay Filing takes the top spot because $199 prepares the California registration and the agent for service of process role costs nothing in year one, then $149 a year.

Past the free first year, agent service runs $149 a year, and that holds in every state.

Its three-year total is $100 above California Registered Agent.ai's, and what the price covers justifies that gap for us.

In the price

  • Registration paperwork done for you
  • Free scans of served papers on the same business day

Good

  • $199 service fee, with the state's fee added
  • The same price in each of the fifty states
  • Papers served on the company are scanned the same business day at no charge

Watch for

  • The agent is $149 a year after year one, $50 above California Registered Agent.ai
Visit Mainstay FilingPartner link. We may earn money if you buy. Read the full Mainstay Filing review

Rank2

Lower renewal than Mainstay

2. California Registered Agent.ai: best for companies adding just California

You pay $199 for the service and the state's fee besides; from the second year the agent is $99

Editor score9.0out of 10

California Registered Agent.ai makes the list at number two because the California registration is $199 and includes year one as agent, with $99 a year after that.

The registered office is an in-state street address supplied by the plan, and any papers served on the company show up as scans in your online account.

In the price

  • Foreign registration done for you
  • The first year as agent for service of process

Good

  • Keeps the agent for $99 a year from year two
  • First-year agent for service of process service is part of the deal
  • A $199 price on top of the registration fee

Watch for

  • California only; your home state needs its own agent
  • The EIN application is an extra charge ($99)

Rank3

Low renewal

3. CA Registered Agent.org: best for California registrations only

Filing work: $199. State fee: added. Agent from year two: $99 a year

Editor score8.7out of 10

CA Registered Agent.org makes the list at number three because the California registration is $199 and includes year one as agent, with $99 a year after that.

The registered office is an in-state street address supplied by the plan, and any papers served on the company show up as scans in your online account.

CA Registered Agent.org matches California Registered Agent.ai on price and features, so this pair is a near tie.

In the price

  • Foreign registration done for you
  • One year of agent for service of process service to start

Good

  • $199 to register, plus state fees
  • Covers your first year of agent for service of process service
  • Keeps the agent for $99 a year from year two

Watch for

  • California only; your home state needs its own agent
  • The EIN application is an extra charge ($99)

The 3 picks side by side

RankCompanyShortlist scoreService priceSecond yearSuitsGo
1 Mainstay Filing 9.5 $199 $149/yr Companies that operate across state lines Visit Mainstay FilingPartner link. We may earn money if you buy.
2 California Registered Agent.ai 9.0 $199 $99/yr The smallest agent renewal on this list Visit California Registered Agent.aiPartner link. We may earn money if you buy.
3 CA Registered Agent.org 8.7 $199 $99/yr The smallest agent renewal on this list Visit CA Registered Agent.orgPartner link. We may earn money if you buy.

The 10-point scores come from Filing Shortlist's editors and the criteria on How we rank. They are not customer ratings.

California foreign registration service pricing in 2026: first year, renewals, three-year total

CompanyFirst yearSecond yearThird yearThree-year totalAgent in year one
Mainstay Filing$199$149$149$497Not stated
California Registered Agent.ai$199$99$99$397Included
CA Registered Agent.org$199$99$99$397Included

Every price comes from the company's own pages as of November 12, 2026. The $70 California registration fee comes on top of each row and is left out of the totals.

How the order came together

What the price covers separated the picks in California. The method gives three-year price 28%, gives what the price covers 28% and splits 44% over renewal terms, fit for the state and price clarity.

Registering in a second state touches two states, and one provider with one price in both scored highest on coverage, ahead of California Registered Agent.ai.

Every criterion and weight is set out on How we rank.

Registering a foreign LLC in California: fee, form and office

Registration goes to the California Secretary of State, Business Entities on the Application to Register a Foreign Limited Liability Company (LLC) (Form LLC-5). The state fee is $70. Along with the form, California expects certificate of good standing (existence or status) from the home state, no older than 180 days when you file.

Each year after that, the company files the Statement of Information, Form LLC-12 for $20, due within 90 days of registering, then every 2 years.

What to have ready before you file

  • Certificate of good standing (existence or status) from the home state, dated within 180 days of filing.
  • The company's exact legal name and its formation date in the home state.
  • A agent for service of process at a street address in the state. Every company on this shortlist can be that agent.
  • Payment of the $70 state fee with the filing.
  • A reminder in your own calendar for the Statement of Information, Form LLC-12 and its $20 fee.

The cost of skipping California registration

An unregistered out-of-state LLC cannot sue in California courts (Corp. Code 17708.07(a)).

Common questions about California foreign registration services

Must an LLC from another state register in California?

It must, once it does business in the state. An unregistered company cannot sue in the state's courts until it does.

What is the full price of a foreign LLC registration in California?

The state fee is $70, and service fees run $199.

What is the California foreign registration form called?

It is the Application to Register a Foreign Limited Liability Company (LLC) (Form LLC-5), submitted to the California Secretary of State, Business Entities.

Does California ask for proof of good standing from home?

It does. The state wants certificate of good standing (existence or status) from the home state, dated no more than 180 days before the filing.

Does a registered foreign LLC still need a agent for service of process?

Yes. The company keeps a agent for service of process in the state, at a street address there, for as long as it stays registered.

Which service leads the California foreign registration shortlist?

Mainstay Filing, because the fee is $199 plus the state's own, with a free first year as agent for service of process, and the price is identical in every state.

Keep reading

Where the figures come from

  1. California Secretary of State (checked again August 2026)
  2. California Secretary of State (checked again August 2026)
  3. California yearly filing: Statement of Information, official source (checked again October 2026)
  4. Cal. Corp. Code § 17702.01 (checked again August 2026)
  5. California registered agent statute (checked again October 2026)
  6. California Secretary of State, foreign LLC forms (checked again October 2026)
  7. Form LLC-5 (checked again October 2026)
  8. Corporations Code section 17708.03 (checked again October 2026)
  9. Revenue and Taxation Code section 19135 (checked again October 2026)
  10. Franchise Tax Board, LLC filing requirements (checked again October 2026)
  11. California Corporations Code 17708.07 (checked again November 2026)
  12. Pulled from Mainstay Filing: California service page, November 12, 2026
  13. Pulled from California Registered Agent.ai: pricing and service pages, November 12, 2026
  14. Pulled from CA Registered Agent.org: pricing and service pages, November 12, 2026