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

South Dakota is cheaper at formation ($150) than Washington ($180). Ongoing costs are also different: $155 vs $170 per year. Total over three years: $615 vs $690.

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

Yes, but your Washington business will almost certainly need to register as a foreign LLC in Washington too, which means paying Washington's foreign registration fee and any ongoing Washington 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 Washington?

South Dakota online: 1 business day; Washington online: 5 business days. South Dakota offers paid expedite from $50. Washington offers paid expedite from $100.

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

South Dakota: no state income tax, no entity-level franchise or LLC tax. Washington: no state income tax, 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 Washington 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 Washington 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 Washington LLC comparison

South Dakota charges $150 to form an LLC; Washington charges $180. 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, South Dakota runs about $75 less in total state fees than Washington. Whether that gap matters depends on whether you actually operate in one of these states or are weighing a non-resident filing.

On speed, South Dakota typically clears standard online filings faster than Washington. Both states offer expedited tiers at an additional cost for filers on tight timelines.

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

Washington $180

South Dakota saves $30

Year 1 total estimate

South Dakota $305

Washington $350

South Dakota saves $45

Ongoing per year

South Dakota $155

Washington $170

South Dakota saves $15

3-year total

South Dakota $615

Washington $690

South Dakota saves $75

Key differences at a glance

South Dakota costs $30 less to form ($150 vs $180).
South Dakota is $15 per year cheaper to maintain ($155 vs $170).

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.

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 Washington

Year 1

$305

$350

Year 2

$460

$520

Year 3

$615

$690

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 Washington, business operates there No foreign LLC registration needed. You pay Washington fees only.	$350	$170	$690
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 Washington with operations elsewhere You pay Washington's fees plus a typical home-state foreign LLC registration of about $200 per year.	$550	$370	$1,290

South Dakota vs Washington: full comparison

Dimension	South Dakota	Washington
Online filing Can you file the formation document online?	Yes	Yes
Online approval time Standard, non-expedited	1 business day	5 business days
Expedited option Paid fast-track filing	$50	$100
Annual report Required in addition to tax	Required, $55	Required, $70
State-imposed annual tax Franchise, privilege, or LLC tax minimum	None	None
State income tax On pass-through LLC income at member level	No	No
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	$180
State sales tax General statewide rate	4.2%	6.5%

Taxes in South Dakota and Washington

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.

Washington tax

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

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.

Washington

Annual report $70, due on your anniversary month. Registered agent required in Washington.

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.

Washington

Check business-name availability on the Washington entity search.
Appoint a registered agent with a physical Washington street address.
File Certificate of Formation - Limited Liability Company for $180.
Wait for approval. Online typically 5 business days. Paid expedite from $100.
Adopt an operating agreement (recommended, not required by Washington 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 $70 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 Washington (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 Washington 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

Washington Secretary of State - Corporations & Charities Division

Website: www.sos.wa.gov/corporations-charities
Phone: (360) 725-0377
Email: corps@sos.wa.gov
Mail: Corporations & Charities Division, P.O. Box 40234, Olympia, WA 98504-0234
Office: 801 Capitol Way S, Olympia, WA 98501-1226
Hours: 8:00 AM to 5:00 PM Pacific, 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

Washington State Department of Revenue

Website: dor.wa.gov
Phone: (360) 705-6705
Mail: Washington State Department of Revenue, P.O. Box 47450, Olympia, WA 98504-7450
Office: 6500 Linderson Way SW, Tumwater, WA 98501
Hours: 8:00 AM to 5:00 PM Pacific, Monday to Friday

Frequently Asked Questions

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

South Dakota is cheaper at formation ($150) than Washington ($180). Ongoing costs are also different: $155 vs $170 per year. Total over three years: $615 vs $690.
Can I form an LLC in South Dakota if I live in Washington?

Yes, but your Washington business will almost certainly need to register as a foreign LLC in Washington too, which means paying Washington's foreign registration fee and any ongoing Washington 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 Washington?

South Dakota online: 1 business day; Washington online: 5 business days. South Dakota offers paid expedite from $50. Washington offers paid expedite from $100.
Which state has lower taxes for an LLC, South Dakota or Washington?

South Dakota: no state income tax, no entity-level franchise or LLC tax. Washington: no state income tax, 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 Washington 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 Washington 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 →
WashingtonOpen Washington LLC guide →

More South Dakota and Washington comparisons

More South Dakota vs ...

More Washington 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: www.sos.wa.gov/corporations-charities/frequently-asked-questions-faqs/… · verified April 21, 2026
WA SoS Corporations & Charities Division Fee Schedule. Under 'Limited Liability Companies (RCW 25.15)': Original Filings = $180. Same $180 fee applies whether filed online through CCFS or by mail. Washington does not charge an online-vs-mail differential for the Certificate of Formation itself.
Expedited filing: www.sos.wa.gov/corporations-charities/frequently-asked-questions-faqs/… · verified April 21, 2026
Expedited service = $100 per business entity, generally processed within three working days. Same-day service = $150 per business entity (front-counter submission only). Mail-in expedited requests must include $100 and label envelope 'EXPEDITE'. We record the $100 three-business-day (approx 72-hour) tier.
Foreign LLC registration fee: www.sos.wa.gov/corporations-charities/business-entities/limited-liabil… · verified April 21, 2026
Foreign Registration for a non-WA LLC = $180 filing fee, matching the domestic Certificate of Formation fee.
Operating agreement requirement: app.leg.wa.gov/rcw/default.aspx?cite=25.15.018 · verified April 21, 2026
RCW 25.15.018 (Washington Limited Liability Company Act) recognizes an LLC agreement that may be oral, written, or implied. There is no statutory requirement that LLCs adopt an operating agreement, so this is recorded as not required. If none is adopted, the default provisions of RCW 25.15 govern.
Publication requirement: app.leg.wa.gov/rcw/default.aspx?cite=25.15 · verified April 21, 2026
Washington imposes no publication requirement on LLCs. RCW Chapter 25.15 contains no publication mandate.
Annual report fee: www.sos.wa.gov/corporations-charities/frequently-asked-questions-faqs/… · verified April 21, 2026
Annual Report fee for profit business entity types (including LLCs) is $70, increased per WAC 434-112-085(7) and codified in RCW 23.95.515. Annual Report with delinquency fee = $95. Initial or Amended Annual Report = $10.
Franchise tax: dor.wa.gov/taxes-rates/business-occupation-tax · verified April 21, 2026
Washington has no franchise tax on LLCs. Washington's Business & Occupation (B&O) tax is a gross-receipts tax, not a franchise tax. B&O rates in 2026: retailing 0.471%, wholesaling 0.484%, manufacturing 0.484%, service & other activities 1.5% (less than $1M in prior-year taxable income), 1.75% ($1M-$5M), 2.1% (over $5M effective Oct 1, 2025). Additional 0.5% surcharge on WA taxable income over $250M from Jan 1, 2026. Because the B&O is structurally a gross-receipts tax on business activity rather than a capital-based franchise tax, franchiseTax.applies is set to false.
Corporate income tax rate: dor.wa.gov/taxes-rates/business-occupation-tax · verified April 21, 2026
Washington has no corporate income tax; maxCorporateRate is recorded as null. The state's business tax is the B&O gross-receipts tax (captured in franchiseTax.notes). Washington also has no state personal income tax, only a 7% long-term capital gains excise tax for individuals above the threshold.
Sales tax rate: dor.wa.gov/taxes-rates/sales-use-tax-rates · verified April 21, 2026
Washington's statewide sales and use tax rate is 6.5%. Cities and counties add local sales taxes, bringing combined rates to roughly 7% to 10.6% depending on jurisdiction. Only the 6.5% statewide rate is recorded here.
Business name search: ccfs.sos.wa.gov/#/AdvancedSearch · verified April 21, 2026
Corporations and Charities Filing System (CCFS) advanced search. Same platform used for online filings.
Online filing portal: ccfs.sos.wa.gov/ · verified April 21, 2026
Washington's Corporations and Charities Filing System (CCFS) portal. Standard online approvals typically complete within 5 business days. Filers can bundle the free Initial Report with the Certificate of Formation to satisfy the 120-day initial report requirement at no extra cost.
Certificate of Formation name: www.sos.wa.gov/sites/default/files/2022-09/12.10.2020---certificate-of… · verified April 21, 2026
Mail-in paper form titled 'Certificate of Formation - Limited Liability Company'. Online filers use the equivalent CCFS on-screen form.

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