3 Best Foreign Registration Services in Wisconsin (2026)
LLC Review Desk's 2026 picks for foreign registration services in Wisconsin, favorite first, are WI Registered Agent.org ($199), Mainstay Filing ($199) and Wisconsin Registered Agent.co ($199). WI Registered Agent.org is our favorite, because $199 beyond the state fee gets you registered in Wisconsin, and the agent renews at $99.
By the LLC Review Desk editorial team
Position 1
Number one here
1. WI Registered Agent.org: best for companies adding only Wisconsin
$199 for the service, and the state fee is extra; the agent is $99 a year from year two
Our score
9.2out of 10
9.2 out of 10
Our favorite is WI Registered Agent.org, because it's $199 plus the state fee, with your first registered agent year included, then $99 a year for the agent.
You get a street address in the state for your registered office, and any papers served on the company are scanned into your online account.
Over three years it costs less than Mainstay Filing, and cost is one of our two biggest criteria.
In the price
Filing with the state
The first year of registered agent service
What we like
Then $99 a year to keep the agent
Covers your first year of registered agent service
A $199 service price plus the registration fee
Trade-offs
Wisconsin only; your home state needs its own agent
2. Mainstay Filing: best for owners working in more than one state
You pay $199 plus the state fee ($299 at checkout), then $149 a year for the agent
Our score
8.7out of 10
8.7 out of 10
Coming in second is Mainstay Filing, because you pay $199 on top of the state's fee, your first year as registered agent is free, and the price is the same in every state.
Year one as agent costs nothing; every later year is $149, in any state.
WI Registered Agent.org is $100 cheaper over three years, so Mainstay Filing comes second on cost.
In the price
Registration paperwork prepared and sent in
Registered agent service is free in year one
Free scans of served papers, same business day
What we like
Same-business-day scans of papers served on the company, no charge
The same price in all fifty states
$199 for the service, plus the state's fee
Your first year of registered agent service is free
Trade-offs
After year one the agent is $149 a year, $50 more than WI Registered Agent.org
3. Wisconsin Registered Agent.co: best for Wisconsin registrations only
You pay $199 plus the state fee, then $99 a year for the agent
Our score
8.6out of 10
8.6 out of 10
In third place is Wisconsin Registered Agent.co, because it's $199 plus the state fee, with your first registered agent year included, then $99 a year for the agent.
You get a street address in the state for your registered office, and any papers served on the company are scanned into your online account.
Between WI Registered Agent.org and Wisconsin Registered Agent.co, prices and features match, so it's nearly a tie.
In the price
Filing with the state
A year of registered agent service at the outset
What we like
Your first year as registered agent is free
$199 to register, plus the state fee
The agent is $99 a year after the first
Trade-offs
Wisconsin only; your home state needs its own agent
LLC Review Desk gives each score out of 10 itself, based on the criteria on How we rank. No customer ratings are involved.
What Wisconsin foreign registration services cost in 2026: year one, renewals and three years
Service
First year
Second year
Third year
Three-year total
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
We took each price from the company's own pages on November 12, 2026. On top of every row, Wisconsin charges a $100 registration fee, which isn't in these totals.
Why we put WI Registered Agent.org first
Here's how we scored it: three-year cost and filings in the price are worth 29% each, and renewal price, state fit and up-front totals split the other 42%. In Wisconsin, three-year cost made the difference.
WI Registered Agent.org comes to $397 over three years, which is $100 less than Mainstay Filing. Both include the first year, so the renewal price decided it.
You can read every criterion and weight on How we rank.
Registering a foreign LLC in Wisconsin: fee, form and who to send it to
You register through the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services, using the Foreign Registration Statement, Limited Liability Company (Form 521). The state charges $100.
After that, plan on the annual report each cycle ($65) by March 31.
Get these ready first
Your company's full legal name, exactly as registered at home, and the date it was formed there.
A registered agent with a street address in the state. Any service on this page can do it.
The $100 state fee to pay with the filing.
A reminder for yourself about the annual report and its $65 fee.
What happens if you skip Wisconsin registration
Its contracts still stand (Wis. Stat. 183.0902(3)).
Your questions about Wisconsin foreign registration services
Do I have to register my out-of-state LLC in Wisconsin?
If it does business there, yes.
What does registering a foreign LLC in Wisconsin come to?
The state charges $100, and services charge $199.
What form does Wisconsin use for foreign LLCs?
The state's form is the Foreign Registration Statement, Limited Liability Company (Form 521), and it goes to the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services.
Do I still need a registered agent after I register?
Yes. You keep a registered agent with a street address in the state as long as the company stays registered.
Which foreign registration services did we review here?
WI Registered Agent.org ($199), Mainstay Filing ($199) and Wisconsin Registered Agent.co ($199), with our favorite first.
Who's the best choice for foreign registration in Wisconsin?
WI Registered Agent.org, because registering in Wisconsin costs $199 and covers year one as your agent, then $99 a year.