Is it cheaper to form an LLC in Idaho or Washington?

Idaho is cheaper at formation ($100) than Washington ($180). Ongoing costs are also different: $100 vs $170 per year. Total over three years: $400 vs $690.

Can I form an LLC in Idaho 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 Idaho 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 Idaho vs Washington?

Idaho online: 7 business days; Washington online: 5 business days. Idaho offers paid expedite from $40. Washington offers paid expedite from $100.

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

Idaho: state income tax applies to member-level pass-through income, 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. Idaho 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 Idaho 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.

Idaho vs Washington LLC comparison

Idaho charges $100 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, Idaho runs about $290 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, Washington typically clears standard online filings faster than Idaho. 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

Idaho $100

Washington $180

Idaho saves $80

Year 1 total estimate

Idaho $200

Washington $350

Idaho saves $150

Ongoing per year

Idaho $100

Washington $170

Idaho saves $70

3-year total

Idaho $400

Washington $690

Idaho saves $290

Key differences at a glance

Idaho costs $80 less to form ($100 vs $180).
Idaho is $70 per year cheaper to maintain ($100 vs $170).
Washington 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 Washington

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.

Idaho Washington

Year 1

$200

$350

Year 2

$300

$520

Year 3

$400

$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 Idaho, business operates there No foreign LLC registration needed. You pay Idaho fees only.	$200	$100	$400
You live in Washington, business operates there No foreign LLC registration needed. You pay Washington fees only.	$350	$170	$690
Non-resident forming in Idaho with operations elsewhere You pay Idaho's fees plus a typical home-state foreign LLC registration of about $200 per year.	$400	$300	$1,000
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

Idaho vs Washington: full comparison

Dimension	Idaho	Washington
Online filing Can you file the formation document online?	Yes	Yes
Online approval time Standard, non-expedited	7 business days	5 business days
Expedited option Paid fast-track filing	$40	$100
Annual report Required in addition to tax	Required, $0	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	Yes	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	$100	$180
State sales tax General statewide rate	6.0%	6.5%

Taxes in Idaho 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.

Idaho tax

No entity-level franchise tax on LLCs. State income tax applies to member-level pass-through income. Corporate rate 5.3%.

Washington tax

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

Ongoing compliance

The recurring filings each state requires after formation.

Idaho

Annual report $0, due on your anniversary month. Registered agent required in Idaho.

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.

Idaho

Check business-name availability on the Idaho entity search.
Appoint a registered agent with a physical Idaho street address.
File Certificate of Organization Limited Liability Company for $100.
Wait for approval. Online typically 7 business days. Paid expedite from $40.
Adopt an operating agreement (recommended, not required by Idaho 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 $0 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 Idaho 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 Idaho 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

Idaho Secretary of State - Business Services Division

Website: sos.idaho.gov
Phone: (208) 334-2301
Mail: Office of the Secretary of State, 450 N 4th Street, PO Box 83720, Boise, ID 83720-0080
Office: 450 N 4th Street, Boise, ID 83702
Hours: 8:00 AM to 5:00 PM Mountain, 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

Idaho State Tax Commission

Website: tax.idaho.gov
Phone: (208) 334-7660
Mail: Idaho State Tax Commission, PO Box 36, Boise, ID 83722-0410
Office: 11321 W Chinden Blvd, Building 2, Boise, ID 83714
Hours: 8:00 AM to 5:00 PM Mountain, 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 Idaho or Washington?

Idaho is cheaper at formation ($100) than Washington ($180). Ongoing costs are also different: $100 vs $170 per year. Total over three years: $400 vs $690.
Can I form an LLC in Idaho 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 Idaho 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 Idaho vs Washington?

Idaho online: 7 business days; Washington online: 5 business days. Idaho offers paid expedite from $40. Washington offers paid expedite from $100.
Which state has lower taxes for an LLC, Idaho or Washington?

Idaho: state income tax applies to member-level pass-through income, 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. Idaho 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 Idaho 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

IdahoOpen Idaho LLC guide →
WashingtonOpen Washington LLC guide →

More Idaho and Washington comparisons

More Idaho vs ...

More Washington vs ...

Sources

Filing fee: sos.idaho.gov/CORP/forms/LLC/LLC%20Cert%20org.pdf · verified April 21, 2026
Idaho SoS Certificate of Organization Limited Liability Company form (Title 30, Chapters 21 and 25, Idaho Code): base filing fee is $100.00. Paper filings add a $20.00 manual processing fee, bringing the paper total to $120.00. Online filings through SOSBiz are the $100 base rate.
Expedited filing: sos.idaho.gov/CORP/forms/LLC/LLC%20Cert%20org.pdf · verified April 21, 2026
Certificate of Organization instructions: expedited service adds $40.00 (8-hour); same-day service adds $100.00. Recording the cheapest expedited tier (8-hour, $40) as the default expedited fee.
Foreign LLC registration fee: sos.idaho.gov/business-forms/ · verified April 21, 2026
Foreign LLC Foreign Registration Statement base filing fee is $100.00 online through SOSBiz; paper filings add the $20 manual processing fee for a $120 paper total.
Operating agreement requirement: legislature.idaho.gov/statutesrules/idstat/Title30/T30CH25/ · verified April 21, 2026
Idaho Uniform Limited Liability Company Act, Idaho Code Title 30, Chapter 25, does not require a written operating agreement. The Certificate of Organization instructions explicitly state: 'Please do not attach operating agreements. They are not filed with this office.' (Idaho Code Section 30-25-201(C)).
Publication requirement: sos.idaho.gov/business-forms/ · verified April 21, 2026
Idaho Uniform LLC Act and SoS filing instructions contain no publication requirement for LLCs.
Annual report fee: sos.idaho.gov/annual-report-help/ · verified April 21, 2026
Idaho annual report filing fee is $0 for online filing through SOSBiz. Paper annual report filings incur the $20 manual processing fee. Due by the end of the anniversary month; administrative dissolution follows 60 days of non-filing.
Franchise tax: tax.idaho.gov/ · verified April 21, 2026
Idaho State Tax Commission imposes no franchise tax on LLCs. C-corps (including LLCs electing C-corp treatment) pay the 5.3% corporate income tax with a $20 minimum; this is an income tax, not a franchise tax.
Corporate income tax rate: tax.idaho.gov/pressrelease/whats-new-for-2025-income-tax-returns/ · verified April 21, 2026
Idaho corporate income tax rate reduced to 5.3% (flat) effective retroactive to January 1, 2025, per House Bill signed in 2025. Previous rate was 5.695%. The 5.3% rate continues in 2026. Corporate minimum tax is $20. Idaho individual rate is also a flat 5.3%.
Sales tax rate: tax.idaho.gov/taxes/sales-use/ · verified April 21, 2026
Idaho statewide sales and use tax rate is 6.0%. A small number of resort cities may impose local option sales taxes, but there is no general local sales tax.
Business name search: sosbiz.idaho.gov/search/business · verified April 21, 2026
Idaho SOSBiz business entity search. Confirm name availability before filing Certificate of Organization (Idaho Code Section 30-21-301 governs LLC name requirements).
Online filing portal: sosbiz.idaho.gov/ · verified April 21, 2026
Idaho SOSBiz is the online business filing portal. Requires free account. Online filings bypass the $20 manual processing fee that applies to paper submissions.
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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