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The Formation Desk

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

Foreign registration picks · Wisconsin

3 Best Foreign Registration Services in Wisconsin (2026)

The The Formation Desk call for foreign registration services in Wisconsin in 2026: WI Registered Agent.org ($199), Mainstay Filing ($199) and Wisconsin Registered Agent.co ($199), in that order. WI Registered Agent.org takes the call: $199 plus the state fee, one year of registered agent service included, then $99 a year for the agent.
Written by The Formation Desk editorial team
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Our top pick in Wisconsin

1. WI Registered Agent.org: best for adding only Wisconsin

$199 plus the state fee, then the agent at $99 a year from year two

Editorial score 9.4 out of 10

The desk picks WI Registered Agent.org: the Wisconsin 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.

Add up three years and it undercuts Mainstay Filing, and cost is one of our two heaviest criteria.

In the price

  • Registration prepared and filed
  • Registered agent service for year one

Strengths

  • A $199 registration price, state fee on top
  • Year-two agent price: $99
  • Registered agent service for year one is covered

Cons

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

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

$199 for the service, $299 due at checkout with the state fee; agent $149 a year after year one

Editorial score 8.9 out of 10

Runner-up, Mainstay Filing: it files the Wisconsin registration for $199 and serves as your registered agent, free in year one, then $149 a year.

Agent service costs nothing in year one and $149 a year from then on, whichever state you register in.

WI Registered Agent.org undercuts Mainstay Filing by $100 over three years, and that is why Mainstay sits lower on cost.

In the price

  • Your foreign registration, handled
  • The first year as your registered agent, free
  • Papers served on the company scanned and uploaded on the same business day, free

Strengths

  • Same price in all fifty states
  • Registered agent costs nothing in year one
  • Free scans of served papers on the same business day
  • $199 service fee, state fee on top

Cons

  • Agent renewal of $149 is $50 above WI Registered Agent.org
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing up close
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Best value here

3. Wisconsin Registered Agent.co: best for Wisconsin registrations only

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

Editorial score 8.6 out of 10

Third, Wisconsin Registered Agent.co: the Wisconsin 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 WI Registered Agent.org and Wisconsin Registered Agent.co, which makes the order a close call.

In the price

  • Registration prepared and filed
  • A first year of registered agent service

Strengths

  • Registers the company for $199, plus the state's fee
  • The first registered agent year is included
  • $99 a year for the agent from year two

Cons

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

The desk's 3 picks in brief

Pick Service Desk score Service fee Year two Good for Visit
1 WI Registered Agent.org 9.4 $199 $99/yr The lowest agent renewal we rank here Visit WI Registered Agent.orgPartner link. We may earn money if you buy.
2 Mainstay Filing 8.9 $199 $149/yr Companies doing business in several states Visit Mainstay FilingPartner link. We may earn money if you buy.
3 Wisconsin Registered Agent.co 8.6 $199 $99/yr The lowest agent renewal we rank here Visit Wisconsin Registered Agent.coPartner 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 Wisconsin 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
WI Registered Agent.org $199 $99 $99 $397 Included
Mainstay Filing $199 $149 $149 $497 Free
Wisconsin Registered Agent.co $199 $99 $99 $397 Included

Every price here was read off the company's own pages on November 12, 2026. Wisconsin's $100 registration fee comes on top of every row and is left out of these totals.

Why WI Registered Agent.org is the pick

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 Wisconsin: spend over three years.

WI Registered Agent.org comes to $397 over three years, $100 less than Mainstay Filing. Both include a first year of agent service, so the renewal price made the call.

The full criteria and weights are on How we rank.

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

To register, the company files the Foreign Registration Statement, Limited Liability Company (Form 521) with the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services and pays the state's $100.

From then on the company owes the annual report ($65), due March 31.

What to pull together first

  • 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.
  • $100 for the state, paid when you file.
  • A date on your calendar for the annual report and its $65 fee.

What it costs to ignore Wisconsin registration

The contracts it signs stay good (Wis. Stat. 183.0902(3)).

Wisconsin foreign registration service: reader questions

Does an LLC from elsewhere have to register to operate in Wisconsin?

Yes, once it starts doing business there.

What will foreign registration cost you in Wisconsin?

$100 goes to the state and $199 to the service.

What does Wisconsin call its foreign registration form?

It goes to the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services, and the form's title is on the facts line above.

Do you still need a registered agent after you register?

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

Which foreign registration services did the desk rank here?

WI Registered Agent.org ($199), Mainstay Filing ($199) and Wisconsin Registered Agent.co ($199), best pick first.

Who is our pick for foreign registration in Wisconsin?

WI Registered Agent.org, since $199 over the state fee to register in Wisconsin, agent renewing at $99.

More from us

Where the numbers came from

  1. Wisconsin Department of Financial Institutions, Division of Corporate & Consumer Services, last checked August 2026
  2. Wisconsin Department of Financial Institutions, Division of Corporate & Consumer Services, last checked August 2026
  3. Wisconsin report due date, last checked August 2026
  4. Wis. Stat. § 183.0201, last checked August 2026
  5. Wisconsin formation fee: Filing fee, official source, last checked October 2026
  6. Wisconsin registered agent statute, last checked October 2026
  7. DFI Form 521, foreign registration statement for an LLC, last checked October 2026
  8. DFI file online, last checked October 2026
  9. Wis. Stat. ss. 183.0902 and 183.0905, last checked October 2026
  10. DFI Form 524, withdrawal of registration, last checked October 2026
  11. Wis. Stat. 183.0902, registration to do business in this state, last checked November 2026
  12. WI Registered Agent.org: pricing and service pages, as of November 12, 2026
  13. Mainstay Filing: Wisconsin service page, as of November 12, 2026
  14. Wisconsin Registered Agent.co: pricing and service pages, as of November 12, 2026