Is it cheaper to form an LLC in South Dakota or Wisconsin?

Wisconsin is cheaper at formation ($130) than South Dakota ($150). Ongoing costs are also different: $125 vs $155 per year. Total over three years: $505 vs $615.

Can I form an LLC in South Dakota if I live in Wisconsin?

Yes, but your Wisconsin business will almost certainly need to register as a foreign LLC in Wisconsin too, which means paying Wisconsin's foreign registration fee and any ongoing Wisconsin obligations on top of the South Dakota ones. The "form elsewhere to save" math usually doesn't work for operating businesses; it only works when you have no physical operations tied to any specific state.

How long does it take to form an LLC in South Dakota vs Wisconsin?

South Dakota online: 1 business day; Wisconsin online: 1 business day. South Dakota offers paid expedite from $50. Wisconsin offers paid expedite from $25.

Which state has lower taxes for an LLC, South Dakota or Wisconsin?

South Dakota: no state income tax, no entity-level franchise or LLC tax. Wisconsin: state income tax applies to member-level pass-through income, no entity-level franchise or LLC tax.

Do both states require a registered agent?

Yes. Every US state (and DC) requires every LLC to maintain a registered agent with a physical street address in the state. South Dakota and Wisconsin both have this requirement. You can serve as your own agent if you live in the state; most out-of-state filers use a commercial agent for $50 to $125 per year.

Which state should I pick if I run an online business from home?

Form in the state you actually live in. Your home state's Department of Revenue treats your residence as nexus regardless of where the LLC is filed, which means you owe state income tax there anyway. Forming in South Dakota or Wisconsin to escape your home state's tax doesn't work; it adds paperwork. The non-resident filings make sense when you genuinely operate nowhere in particular: international founders, purely passive holding entities, or real-estate LLCs owning property in other states.

South Dakota vs Wisconsin LLC comparison

South Dakota charges $150 to form an LLC; Wisconsin charges $130. Day-one sticker price is only part of the story, since most of the real cost comes from the annual obligations that stack up each year you keep the LLC open.

Over a rolling three-year window, Wisconsin runs about $110 less in total state fees than South Dakota. Whether that gap matters depends on whether you actually operate in one of these states or are weighing a non-resident filing.

For most small operators the choice is not really between these two states at all. It is between forming where the business actually operates and trying to route through a non-resident filing. The data below shows what each option actually costs.

Formation filing fee

South Dakota $150

Wisconsin $130

Wisconsin saves $20

Year 1 total estimate

South Dakota $305

Wisconsin $255

Wisconsin saves $50

Ongoing per year

South Dakota $155

Wisconsin $125

Wisconsin saves $30

3-year total

South Dakota $615

Wisconsin $505

Wisconsin saves $110

Key differences at a glance

Wisconsin costs $20 less to form ($130 vs $150).
Wisconsin is $30 per year cheaper to maintain ($125 vs $155).
South Dakota has no state individual income tax; pass-through LLC income flows to members without a state layer. The other state does tax at the member level.

Where each state fits

For most filers, forming in the state you actually operate from is the right call. The side-by-side below shows where the two states meaningfully diverge.

What each state offers that the other does not

Only South Dakota

No state income tax

Both states

Online filing
Paid expedited tier
No entity-level franchise or LLC tax
No publication requirement
Operating agreement not statutorily required

Three-year cost, side by side

Rough estimate of the state-facing cost to form and keep an LLC through three years. Both totals include a $100 per year registered-agent estimate.

South Dakota Wisconsin

Year 1

$305

$255

Year 2

$460

$380

Year 3

$615

$505

Running total includes the one-time filing fee and annual ongoing costs (report fee or franchise tax plus a $100/year registered agent estimate).

What it costs under your specific situation

The table below runs the same LLC through four common scenarios. "Non-resident" rows assume a typical home-state foreign LLC registration adds about $200 per year of stacked cost; the real number depends on which state you live in and ranges from $50 to over $800 depending on jurisdiction.

Scenario	Year 1	Each year after	3-year total
You live in South Dakota, business operates there No foreign LLC registration needed. You pay South Dakota fees only.	$305	$155	$615
You live in Wisconsin, business operates there No foreign LLC registration needed. You pay Wisconsin fees only.	$255	$125	$505
Non-resident forming in South Dakota with operations elsewhere You pay South Dakota's fees plus a typical home-state foreign LLC registration of about $200 per year.	$505	$355	$1,215
Non-resident forming in Wisconsin with operations elsewhere You pay Wisconsin's fees plus a typical home-state foreign LLC registration of about $200 per year.	$455	$325	$1,105

South Dakota vs Wisconsin: full comparison

Dimension	South Dakota	Wisconsin
Online filing Can you file the formation document online?	Yes	Yes
Online approval time Standard, non-expedited	1 business day	1 business day
Expedited option Paid fast-track filing	$50	$25
Annual report Required in addition to tax	Required, $55	Required, $25
State-imposed annual tax Franchise, privilege, or LLC tax minimum	None	None
State income tax On pass-through LLC income at member level	No	Yes
Publication requirement Newspaper publication after formation	No	No
Operating agreement Required by state statute	Recommended, not required	Recommended, not required
Foreign LLC fee Cost to register as a foreign LLC in this state	$750	$100
State sales tax General statewide rate	4.2%	5.0%

Taxes in South Dakota and Wisconsin

How each state handles entity-level tax on LLCs. Pass-through classification means member-level income tax also applies at each member's residence state.

South Dakota tax

No entity-level franchise tax on LLCs. No state income tax.

Wisconsin tax

No entity-level franchise tax on LLCs. State income tax applies to member-level pass-through income. Corporate rate 7.9%.

Ongoing compliance

The recurring filings each state requires after formation.

South Dakota

Annual report $55, due on your anniversary month. Registered agent required in South Dakota.

Wisconsin

Annual report $25, due on your anniversary month. Registered agent required in Wisconsin.

Formation process, side by side

What actually happens from the moment you start filing to the moment you're in good standing. Use this as a checklist.

South Dakota

Check business-name availability on the South Dakota entity search.
Appoint a registered agent with a physical South Dakota street address.
File Articles of Organization (Domestic Limited Liability Company) for $150.
Wait for approval. Online typically 1 business days. Paid expedite from $50.
Adopt an operating agreement (recommended, not required by South Dakota statute).
Apply for a federal EIN (free from the IRS).
Open a business bank account to separate personal and business finances.
File your first annual report and pay $55 when it comes due.

Wisconsin

Check business-name availability on the Wisconsin entity search.
Appoint a registered agent with a physical Wisconsin street address.
File Articles of Organization, Limited Liability Company (Form DFI/CORP/502) for $130.
Wait for approval. Online typically 1 business days. Paid expedite from $25.
Adopt an operating agreement (recommended, not required by Wisconsin statute).
Apply for a federal EIN (free from the IRS).
Open a business bank account to separate personal and business finances.
File your first annual report and pay $25 when it comes due.

Before you pick either state

A few things that apply no matter which state you choose. These trip up enough first-time filers that they're worth stating explicitly.

Registered agent is non-negotiable. Both South Dakota and Wisconsin (and every other US state) require every LLC to designate a registered agent with a physical street address in the state of formation. You can serve as your own agent if you live in the state; otherwise a commercial agent runs $50 to $125 per year. Using your own home address makes it part of the public record.

Forming elsewhere does not escape your home state's tax. If you live and operate a business from your home state, forming the LLC in South Dakota or Wisconsin does not avoid your home state's income tax. The moment you transact business at home, your home state requires a foreign LLC registration, and state tax liability follows your residence regardless of where the entity sits on paper.

EIN applications are free. The IRS issues Employer Identification Numbers directly at no cost. Any service charging you to "get your EIN" is reselling a free form submission. Single-member LLCs with no employees technically don't need one for federal tax, but nearly every bank requires an EIN to open a business account.

Operating agreement matters more than the state you pick. A well-drafted operating agreement governs member ownership, management, profit splits, buy-sell terms, and dissolution. Without one, your LLC runs on the state's default rules, which are rarely what you want. California, Maine, Missouri, and New York require a written one by statute; every other state treats it as strongly recommended.

Agency contacts

South Dakota Secretary of State - Business Services

Website: sdsos.gov
Phone: (605) 773-4845
Email: corpinfo@state.sd.us
Mail: Capitol Building, 500 East Capitol Avenue, Suite 204, Pierre, SD 57501-5070
Office: 215 E. Prospect Avenue, Pierre, SD 57501
Hours: 8:00 AM to 5:00 PM Central, Monday to Friday

Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services

Website: dfi.wi.gov/Pages/BusinessServices/BusinessEntities/Default.aspx
Phone: (608) 261-7577
Email: DFICorporations@dfi.wisconsin.gov
Mail: Department of Financial Institutions, Division of Corporate and Consumer Services, P.O. Box 93348, Milwaukee, WI 53293-0348
Office: 4822 Madison Yards Way, North Tower, Madison, WI 53705
Hours: 7:45 AM to 4:30 PM Central, Monday to Friday

South Dakota Department of Revenue

Website: dor.sd.gov
Phone: (605) 773-3311
Mail: 445 E Capitol Avenue, Pierre, SD 57501
Hours: 8:00 AM to 5:00 PM Central, Monday to Friday

Wisconsin Department of Revenue

Website: www.revenue.wi.gov
Phone: (608) 266-2776
Mail: Wisconsin Department of Revenue, P.O. Box 268, Madison, WI 53790-0001
Office: 2135 Rimrock Road, Madison, WI 53713
Hours: 7:45 AM to 4:30 PM Central, Monday to Friday

Frequently Asked Questions

Is it cheaper to form an LLC in South Dakota or Wisconsin?

Wisconsin is cheaper at formation ($130) than South Dakota ($150). Ongoing costs are also different: $125 vs $155 per year. Total over three years: $505 vs $615.
Can I form an LLC in South Dakota if I live in Wisconsin?

Yes, but your Wisconsin business will almost certainly need to register as a foreign LLC in Wisconsin too, which means paying Wisconsin's foreign registration fee and any ongoing Wisconsin obligations on top of the South Dakota ones. The "form elsewhere to save" math usually doesn't work for operating businesses; it only works when you have no physical operations tied to any specific state.
How long does it take to form an LLC in South Dakota vs Wisconsin?

South Dakota online: 1 business day; Wisconsin online: 1 business day. South Dakota offers paid expedite from $50. Wisconsin offers paid expedite from $25.
Which state has lower taxes for an LLC, South Dakota or Wisconsin?

South Dakota: no state income tax, no entity-level franchise or LLC tax. Wisconsin: state income tax applies to member-level pass-through income, no entity-level franchise or LLC tax.
Do both states require a registered agent?

Yes. Every US state (and DC) requires every LLC to maintain a registered agent with a physical street address in the state. South Dakota and Wisconsin both have this requirement. You can serve as your own agent if you live in the state; most out-of-state filers use a commercial agent for $50 to $125 per year.
Which state should I pick if I run an online business from home?

Form in the state you actually live in. Your home state's Department of Revenue treats your residence as nexus regardless of where the LLC is filed, which means you owe state income tax there anyway. Forming in South Dakota or Wisconsin to escape your home state's tax doesn't work; it adds paperwork. The non-resident filings make sense when you genuinely operate nowhere in particular: international founders, purely passive holding entities, or real-estate LLCs owning property in other states.

Full state guides

South DakotaOpen South Dakota LLC guide →
WisconsinOpen Wisconsin LLC guide →

More South Dakota and Wisconsin comparisons

More South Dakota vs ...

More Wisconsin vs ...

Sources

Filing fee: sdsos.gov/general-information/filing-fees.aspx · verified April 21, 2026
SD SoS filing fee schedule: Domestic LLC Articles of Organization filed electronically online is $150; filed via paper is $165 (includes the $15 paper filing fee). Online is the default; filingFee captures the online amount.
Expedited filing: sdsos.gov/general-information/filing-fees.aspx · verified April 21, 2026
SD SoS offers expedited processing for any filing at an additional $50 flat fee, defined as completion sooner than the normal course of business on request. Typical expedited turnaround is 24 hours.
Foreign LLC registration fee: sdsos.gov/general-information/filing-fees.aspx · verified April 21, 2026
Foreign LLC Certificate of Authority online filing fee is $750; paper is $765 (includes $15 paper filing fee). This is materially higher than the $150 domestic fee; South Dakota is one of the most expensive states for foreign LLC registration.
Operating agreement requirement: sdlegislature.gov/Statutes/47-34A · verified April 21, 2026
SDCL 47-34A (Uniform Limited Liability Company Act) defines an operating agreement under 47-34A-103 as any valid agreement, written or oral, governing relations among members, managers, and the LLC. The statute does not require the operating agreement to be in writing.
Publication requirement: sdlegislature.gov/Statutes/47-34A · verified April 21, 2026
SDCL 47-34A contains no newspaper publication requirement for LLC formation. Only NY, AZ, and NE require publication.
Annual report fee: sdsos.gov/general-information/filing-fees.aspx · verified April 21, 2026
SD SoS filing fee schedule: LLC Annual Report filed electronically online is $55; filed via paper is $70 (includes the $15 paper filing surcharge). Due first day of the anniversary month each year.
Franchise tax: dor.sd.gov/businesses/taxes/ · verified April 21, 2026
SD Department of Revenue confirms South Dakota does not impose a general corporate income tax or franchise tax. A narrow bank franchise tax applies only to financial institutions under SDCL 10-43.
Corporate income tax rate: dor.sd.gov/businesses/taxes/ · verified April 21, 2026
South Dakota has no corporate income tax. Field set to null.
Sales tax rate: dor.sd.gov/businesses/taxes/sales-use-tax/ · verified April 21, 2026
SD Department of Revenue: the state sales and use tax rate is 4.2%. Municipalities may impose up to 2% additional general sales tax.
Business name search: sosenterprise.sd.gov/BusinessServices/Business/FilingSearch.aspx · verified April 21, 2026
SD SoS Enterprise business information search. Use before filing Articles of Organization to confirm name availability.
Online filing portal: sosenterprise.sd.gov/BusinessServices/Business/RegistrationInstr.aspx · verified April 21, 2026
SD SoS Enterprise online business registration portal. Online LLC filings are typically approved immediately or within one business day; paper filings take about 3-5 business days plus mail transit.
Certificate of Formation form: sdsos.gov/docs/business/llc-domestic-articlesoforganization.pdf · verified April 21, 2026
Official Domestic LLC Articles of Organization fillable PDF published by the SD SoS, used for paper filings.
Filing fee: dfi.wi.gov/Pages/BusinessServices/BusinessEntities/Fees.aspx · verified April 21, 2026
Wisconsin DFI Corporation Fee Schedule: Articles of Organization $170 paper, $130 online. Online fee recorded as the default filingFee. Authority: Wis. Stat. 183.0114.
Expedited filing: dfi.wi.gov/Pages/BusinessServices/BusinessEntities/Fees.aspx · verified April 21, 2026
Wisconsin DFI expedited service: $25 for next business day processing (paper filings), $250 for 4-hour in-person, $500 for 1-hour in-person. Online filings are typically processed within one business day without extra expedite fee; $25 next-day tier recorded.
Annual report fee: dfi.wi.gov/Pages/BusinessServices/BusinessEntities/Fees.aspx · verified April 21, 2026
Wisconsin domestic LLC annual report: $25 online, $40 by mail. Foreign LLC annual report: $65 online, $80 by mail. Online fee recorded. Authority: Wis. Stat. 183.0212 (2023 WULLCL) for reporting requirement, DFI fee schedule for fee amounts.
Franchise tax: www.revenue.wi.gov/Pages/FAQS/ise-crpginfo.aspx · verified April 21, 2026
Wisconsin DOR Corporation Income/Franchise Tax FAQ: corporations and LLCs treated as corporations pay franchise or income tax at 7.9%. Standard LLCs (partnerships or disregarded entities) are not subject to the entity-level franchise tax. There is no flat minimum LLC tax in Wisconsin.
Corporate income tax rate: www.revenue.wi.gov/Pages/FAQS/ise-crpginfo.aspx · verified April 21, 2026
Wisconsin corporate franchise/income tax rate is a flat 7.9% under Wis. Stat. 71.27. Applies to C corps and LLCs taxed as C corps.
Sales tax rate: www.revenue.wi.gov/Pages/FAQS/pcs-taxrates.aspx · verified April 21, 2026
Wisconsin statewide sales and use tax is 5%. County tax adds 0.5% in most counties; premier resort area taxes apply in a few localities. Statewide base rate recorded here.
Foreign LLC registration fee: dfi.wi.gov/Pages/BusinessServices/BusinessEntities/Fees.aspx · verified April 21, 2026
Wisconsin DFI fee schedule: Foreign LLC Application for Certificate of Registration $100. Authority: Wis. Stat. 183.1002.
Operating agreement requirement: docs.legis.wisconsin.gov/statutes/statutes/183/i/0105 · verified April 21, 2026
Wis. Stat. 183.0105 (Wisconsin Uniform Limited Liability Company Law, effective Jan. 1, 2023): operating agreement may be oral, written, implied, or a combination. Not required for LLC validity. Default statutory rules under Chapter 183 apply when no operating agreement is adopted.
Publication requirement: docs.legis.wisconsin.gov/statutes/statutes/183 · verified April 21, 2026
Wisconsin Chapter 183 contains no publication or newspaper notice requirement for LLC formation.
Business name search: www.wdfi.org/apps/CorpSearch/Search.aspx · verified April 21, 2026
Wisconsin DFI CorpSearch. Used to confirm name availability before filing Form 502.

Legal Disclaimer: FreeNetLaw provides general legal information, not legal advice. The information on this site is not a substitute for consultation with a licensed attorney. Laws vary by jurisdiction and change frequently. Always verify information with official sources and consult a qualified attorney for advice about your specific situation.