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Filing Verdict

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

Foreign registration verdict · Wisconsin

3 Best Foreign Registration Services in Wisconsin (2026)

Filing Verdict's 2026 verdict on foreign registration services in Wisconsin: Wisconsin Registered Agent.co ($199), Mainstay Filing ($199) and WI Registered Agent.org ($199), in that order. Wisconsin Registered Agent.co takes first place: $199 over the state fee to register in Wisconsin, with the agent renewing at $99.
The Filing Verdict editorial team
Top pick on this page
Spot 1

1. Wisconsin Registered Agent.co: best for companies adding only Wisconsin

Service fee $199, state fee extra; agent $99 yearly after year one

9.2Editorial score
out of 10

Wisconsin Registered Agent.co wins here: $199 plus the state fee, with a year of registered agent service included, then $99 a year for the agent.

The plan gives the company an in-state street address as its registered office, and papers served on the company are scanned to your online account.

Three-year cost is where it pulls ahead of Mainstay Filing.

What you get

  • The registration filing
  • Year-one registered agent service

What we like

  • $99 a year for the agent from year two
  • $199 to register, plus the state's fee
  • Year-one registered agent service included

Cons

  • Covers Wisconsin only; your home state needs its own agent
  • The EIN application is billed separately ($99)
Visit Wisconsin Registered Agent.coPartner link. We may earn money if you buy. Our full Wisconsin Registered Agent.co verdict
Same price in every state
Spot 2

2. Mainstay Filing: best for companies working in several states

Service fee $199, $299 due at checkout with the state fee; agent $149 yearly after year one

8.7Editorial score
out of 10

Second place goes to Mainstay Filing: $199 on top of the state fee, the same in any state, with the first year of registered agent service included.

After the free first year the agent is $149 a year, whichever state you register in.

Over three years Wisconsin Registered Agent.co is $100 cheaper, which puts Mainstay Filing behind it on cost.

What you get

  • The registration, prepared and submitted for you
  • Free registered agent service for the first year
  • Free same-business-day scans of service of process

What we like

  • Same-business-day scans of served papers, free
  • Registered agent service free in year one
  • Service fee of $199, plus the state's fee
  • One price in all fifty states

Cons

  • After year one its agent runs $149 a year, $50 above Wisconsin Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy. Our full Mainstay Filing verdict
Low renewal
Spot 3

3. WI Registered Agent.org: best for Wisconsin registrations only

$199 on top of the state fee; the agent is $99 a year from year two

8.6Editorial score
out of 10

Third place goes to WI Registered Agent.org: $199 plus the state fee, with a year of registered agent service included, then $99 a year for the agent.

The plan gives the company an in-state street address as its registered office, and papers served on the company are scanned to your online account.

Nothing in the published prices or features divides Wisconsin Registered Agent.co from WI Registered Agent.org; pick either.

What you get

  • The registration filing
  • Year-one registered agent service

What we like

  • Includes the first year as your registered agent
  • Registration at $199 before state fees
  • Then $99 a year for agent service

Cons

  • Covers Wisconsin only; your home state needs its own agent
  • The EIN application is billed separately ($99)
Visit WI Registered Agent.orgPartner link. We may earn money if you buy. Our full WI Registered Agent.org verdict

The 3 verdicts at a glance

No.ServiceVerdict scoreService feeYear twoBest forVisit
1Wisconsin Registered Agent.co9.2$199$99/yrThe lowest agent renewal here Visit Wisconsin Registered Agent.coPartner link. We may earn money if you buy.
2Mainstay Filing8.7$199$149/yrCompanies registered in several states Visit Mainstay FilingPartner link. We may earn money if you buy.
3WI Registered Agent.org8.6$199$99/yrThe lowest agent renewal here Visit WI Registered Agent.orgPartner link. We may earn money if you buy.
Scores come from Filing Verdict's editors, out of 10, using the criteria explained on How we rank; they are not customer ratings.

Wisconsin foreign registration service prices for 2026: year one, renewals and three years

ServiceYear 1Year 2Year 3Total, 3 yearsAgent covered in year one
Wisconsin Registered Agent.co$199$99$99$397Included
Mainstay Filing$199$149$149$497Free
WI Registered Agent.org$199$99$99$397Included
Prices were read from each company's own pages on November 12, 2026. Wisconsin's $100 registration fee goes on top of every row and is not counted in these totals.

What settled the order

Two criteria lead Filing Verdict's method at 35% apiece: total over three years and paperwork the price handles. Renewal behavior, match to the state and up-front pricing share the other 30%, and Wisconsin came down to total over three years.

Wisconsin Registered Agent.co totals $397 over three years, $100 under Mainstay Filing. Year one is covered by both services, so the renewal price decided the order.

The full list of criteria and weights is on How we rank.

Wisconsin foreign LLC registration: the fee, the form and the filing office

The company registers with the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services by filing the Foreign Registration Statement, Limited Liability Company (Form 521). The state fee is $100.

Afterwards the company files the annual report ($65), due March 31.

Before you file: a checklist

  • The exact legal name from the home state, and the date the company was formed there.
  • A registered agent with a street address in the state; each service on this page can act in that role.
  • The $100 state fee, paid with the filing.
  • A calendar entry for the annual report and its $65 fee.

What skipping Wisconsin registration can cost

Contracts it signs stay valid (Wis. Stat. 183.0902(3)).

Wisconsin foreign registration service: questions answered

Does Wisconsin require an out-of-state LLC to register?

Yes, once it transacts business there.

What does foreign registration cost in Wisconsin?

The state fee is $100, and the service fee is $199.

Which form does Wisconsin use for foreign registration?

Use the Foreign Registration Statement, Limited Liability Company (Form 521), filed with the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services.

Is a registered agent required once I have registered?

Yes. The company still needs a registered agent here, with a street address in the state.

Which foreign registration services are ranked on this page?

Wisconsin Registered Agent.co ($199), Mainstay Filing ($199) and WI Registered Agent.org ($199), from first place to last.

Which foreign registration service is the best pick in Wisconsin?

Wisconsin Registered Agent.co, because the Wisconsin registration for $199 with the first agent year included, then $99 a year.

More from us

Sources and dates

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