3 Best Foreign Registration Services in Wisconsin (2026), and What to Know First
Wondering about foreign registration services in Wisconsin, for 2026 our order is WI Registered Agent.org ($199), Mainstay Filing ($199) and Wisconsin Registered Agent.co ($199). Every option pays Wisconsin $100, then $397 to $497 to a service across three years.
Answered by the Ask About LLC editorial team ·
Four quick answers
What does the state charge to register?
$100
Do you bring a certificate from home?
No
Once registered
$65, annual report
Who to ask
WI Registered Agent.org, Mainstay Filing then Wisconsin Registered Agent.co
Who should you ask in Wisconsin?
The order follows our five questions: three-year cost first, then how much the price covers.
1Ask this one first
1. WI Registered Agent.org: best for adding only this state
Registering costs $199, then $99 a year for the agent
Why WI Registered Agent.org at the top? Registering costs $199 over the state fee, with the agent covered in year one, then $99 a year.
Yes, it costs less than Mainstay Filing over three years, and cost is the question we weigh most.
What the price covers
Foreign filing submitted
Agent included in year one
Good news
Year one of the agent comes with it
$199 plus the state fee
A renewal of $99
The catch
Serves Wisconsin alone, so the home state needs another agent
Service fees only, from each company's prices on November 13, 2026. State fees are the same whichever you pick.
Questions owners ask
Does my LLC from another state have to register?
Register with the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services before your LLC starts doing business in Wisconsin.
looked up at dfi.wi.gov in October 2026 to confirm
How much does registration cost?
The state charges $100, and a service adds $199.
Add three years of state fees, registration included, and you get $230. looked up at dfi.wi.gov in October 2026 to confirm
Which form do I file, and with whom?
You need one document, the Foreign Registration Statement, Limited Liability Company (Form 521), and the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services is where it is sent.
The state leaves the home-state certificate out of its requirements.
Is there a filing that repeats?
Down the road there is the annual report, which costs $65.
When the filing is due, per the state: March 31.
Why is the list in this order?
On what you pay over three years, worth 33%, WI Registered Agent.org comes out ahead.
62% of the score comes from what you pay over three years and chores the price takes care of.
WI Registered Agent.org totals $397 across three years, which is $100 under Mainstay Filing.
looked up at dfi.wi.gov in October 2026 to confirm
Good standing proof
No
looked up at dfi.wi.gov in October 2026 to confirm
Annual report
$65
looked up at dfi.wi.gov in October 2026 to confirm
State fees, years one to three
$230
The rows above, added up
You can check the total by hand: take the filing fee, add two reports and any minimum tax. Costs that have no set amount are left for the text to explain.
Still wondering?
Do I still need an agent in my home state?
Probably. Your home state still wants an agent of its own. A company that operates in every state, Mainstay Filing for example, can hold both roles, whereas a local firm covers a single state.
What do the picks cost over three years?
For three years you would pay $397 at WI Registered Agent.org, $497 at Mainstay Filing, $397 at Wisconsin Registered Agent.co, before state fees.
Where do these numbers come from?
Official Wisconsin sources back the state side, and posted company prices back the service side.
Do I have to use a service?
No. What the law asks for is a filing, and it does not say who has to send it.
Can I hire someone to register the LLC?
They do. All the picks prepare and send the registration, so the only thing that changes with your choice is the service fee.
What is the best foreign registration service for Wisconsin?
WI Registered Agent.org, because $199 gets the registration filed, and the agent renews at $99. After that, Mainstay Filing and Wisconsin Registered Agent.co.
Where did we look this up?
Our answer on Wisconsin Department of Financial Institutions rests on dfi.wi.gov, a page we confirmed August 2026 and still point you to
Our answer on Wisconsin Department of Financial Institutions rests on dfi.wi.gov, a page we confirmed August 2026 and still point you to
Our answer on Wisconsin report due date rests on docs.legis.wisconsin.gov, a page we confirmed August 2026 and still point you to
Our answer on Wis rests on dfi.wi.gov, a page we confirmed August 2026 and still point you to
Our answer on Wisconsin formation fee: Filing fee rests on dfi.wi.gov, a page we confirmed October 2026 and still point you to
Our answer on Wisconsin registered agent statute rests on docs.legis.wisconsin.gov, a page we confirmed October 2026 and still point you to
Our answer on DFI Form 521, foreign registration rests on dfi.wi.gov, a page we confirmed October 2026 and still point you to
Our answer on DFI file online rests on dfi.wi.gov, a page we confirmed October 2026 and still point you to
Our answer on Wis rests on docs.legis.wisconsin.gov, a page we confirmed October 2026 and still point you to
Our answer on DFI Form 524, withdrawal of rests on dfi.wi.gov, a page we confirmed October 2026 and still point you to
Our answer on Wis rests on docs.legis.wisconsin.gov, a page we confirmed November 2026 and still point you to
The WI Registered Agent.org pricing page, as it stood on November 13, 2026
The Mainstay Filing Wisconsin service page, as it stood on November 13, 2026
The Wisconsin Registered Agent.co pricing page, as it stood on November 13, 2026