Skip to content
The Formation Desk

Rankings of registered agents, LLC formation and foreign registration services in all 50 states.

Foreign registration picks · South Carolina

3 Best Foreign Registration Services in South Carolina (2026)

The The Formation Desk call for foreign registration services in South Carolina in 2026: Mainstay Filing ($199), South Carolina Registered Agent.co ($199) and SC Registered Agent.org ($199), in that order. Mainstay Filing takes the call: $199 plus the state's own fee, the registered agent free for year one and the same price in every state.
Written by The Formation Desk editorial team
1
Our top pick in South Carolina

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

$199 plus the state fee ($309 due at checkout), then the agent at $149 a year from year two

Editorial score 9.4 out of 10

The desk picks Mainstay Filing: it files the South Carolina registration for $199 and serves as your registered agent, free in year one, then $149 a year.

The first agent year is free, and after that the agent runs $149 a year, in any state.

Over three years Mainstay runs $100 more than South Carolina Registered Agent.co, and the desk thinks the wider coverage is worth it.

In the price

  • Your foreign registration, handled
  • Any service of process scanned for free and uploaded that business day

Strengths

  • Free scans of served papers on the same business day
  • $199 service fee, state fee on top
  • Same price in all fifty states

Cons

  • Agent renewal of $149 is $50 above South Carolina Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing up close
2
Best for a South Carolina-only company

2. South Carolina Registered Agent.co: best for adding only South Carolina

$199 for the service, state fee on top; agent $99 a year after year one

Editorial score 9.2 out of 10

Runner-up, South Carolina Registered Agent.co: the South Carolina registration for $199, first agent year included, then $99 yearly.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

In the price

  • The registration filing
  • Registered agent service for year one

Strengths

  • Registered agent service for year one is covered
  • Then $99 a year for agent service
  • Registration at $199 before state fees

Cons

  • South Carolina only; your home state needs its own agent
  • EIN application will cost you $99 more
Visit South Carolina Registered Agent.coPartner link. We may earn money if you buy. South Carolina Registered Agent.co up close
3
Low renewal

3. SC Registered Agent.org: best for South Carolina registrations only

$199 for the service, state fee on top; agent $99 a year after year one

Editorial score 8.9 out of 10

Third, SC Registered Agent.org: the South Carolina registration for $199, first agent year included, then $99 yearly.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

On price and features there is nothing between South Carolina Registered Agent.co and SC Registered Agent.org, which makes the order a close call.

In the price

  • The registration filing
  • A first year of registered agent service

Strengths

  • Year-two agent price: $99
  • $199 to register, state fee extra
  • Includes a first year as your registered agent

Cons

  • South Carolina only; your home state needs its own agent
  • EIN application will cost you $99 more
Visit SC Registered Agent.orgPartner link. We may earn money if you buy. SC Registered Agent.org up close

The desk's 3 picks in brief

Pick Service Desk score Service fee Year two Good for Visit
1 Mainstay Filing 9.4 $199 $149/yr Companies doing business in several states Visit Mainstay FilingPartner link. We may earn money if you buy.
2 South Carolina Registered Agent.co 9.2 $199 $99/yr The lowest agent renewal we rank here Visit South Carolina Registered Agent.coPartner link. We may earn money if you buy.
3 SC Registered Agent.org 8.9 $199 $99/yr The lowest agent renewal we rank here Visit SC Registered Agent.orgPartner link. We may earn money if you buy.

The Formation Desk sets every score out of 10 itself from the weighted criteria on How we rank; customers do not rate anything.

What a South Carolina foreign registration service costs in 2026: year one, renewal and the three-year bill

Service Year one Year two Year three Bill over three years Agent covered in year one
Mainstay Filing $199 $149 $149 $497 Not stated
South Carolina Registered Agent.co $199 $99 $99 $397 Included
SC Registered Agent.org $199 $99 $99 $397 Included

Every price here was read off the company's own pages on November 12, 2026. South Carolina's $110 registration fee comes on top of every row and is left out of these totals.

How the desk made the call

The Formation Desk counts spend over three years and work the price removes for 33% each; what renewal looks like, fit with the state and plain price display make up the other 34%. What tipped South Carolina: work the price removes.

Foreign registration means two states, and one provider at one price in both won on coverage, ahead of South Carolina Registered Agent.co.

The full criteria and weights are on How we rank.

Registering a foreign LLC in South Carolina: fee, form and who gets it

To register, the company files the Application for a Certificate of Authority by a Foreign Limited Liability Company (Form F0008) with the South Carolina Secretary of State and pays the state's $110. South Carolina also wants certificate of existence from the home-state Secretary of State, issued within 30 days of the filing.

South Carolina asks nothing yearly of foreign LLCs.

What to pull together first

  • Certificate of existence from the home-state Secretary of State, issued in the 30 days before you file.
  • The company name exactly as the home state spells it, and when it was formed.
  • An in-state registered agent; any service the desk picked can fill that seat.
  • $110 for the state, paid when you file.

What it costs to ignore South Carolina registration

Until it registers, an outside LLC has no right to sue in South Carolina courts (S.C. Code 33-44-1008(a)). The contracts it signs stay good (S.C. Code 33-44-1008(b)).

South Carolina foreign registration service: reader questions

Does an LLC from elsewhere have to register to operate in South Carolina?

Yes, once it starts doing business there. Until it registers it cannot sue in the state's courts.

What will foreign registration cost you in South Carolina?

$110 goes to the state and $199 to the service.

What does South Carolina call its foreign registration form?

It goes to the South Carolina Secretary of State, and the form's title is on the facts line above.

Will South Carolina ask for something from your home state?

Yes: certificate of existence from the home-state Secretary of State, issued in the last 30 days.

Do you still need a registered agent after you register?

Yes. Keep a registered agent with a street address in the state on file.

Who is our pick for foreign registration in South Carolina?

Mainstay Filing, since $199 on top of state fees in any state, with the first year of registered agent service included.

More from us

Where the numbers came from

  1. S.C. Code § 33-44-202 and § 33-44-203, last checked August 2026
  2. South Carolina Business Entities Online, last checked October 2026
  3. SC Secretary of State, business entity FAQs, last checked October 2026
  4. SC Department of Revenue, corporate FAQs, last checked October 2026
  5. S.C. Code Title 33, Chapter 44, Uniform Limited Liability Company Act, last checked November 2026
  6. Mainstay Filing: South Carolina service page, as of November 12, 2026
  7. South Carolina Registered Agent.co: pricing and service pages, as of November 12, 2026
  8. SC Registered Agent.org: pricing and service pages, as of November 12, 2026