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

Arizona is cheaper at formation ($50) than Idaho ($100). Ongoing costs are also different: $100 vs $100 per year. Total over three years: $350 vs $400.

Can I form an LLC in Arizona if I live in Idaho?

Yes, but your Idaho business will almost certainly need to register as a foreign LLC in Idaho too, which means paying Idaho's foreign registration fee and any ongoing Idaho obligations on top of the Arizona 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 Arizona vs Idaho?

Arizona online: 14 business days; Idaho online: 7 business days. Arizona offers paid expedite from $35. Idaho offers paid expedite from $40.

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

Arizona: state income tax applies to member-level pass-through income, no entity-level franchise or LLC tax. Idaho: 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. Arizona and Idaho 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.

Does Arizona or Idaho have a publication requirement?

Arizona does. New LLCs must publish a formation notice in approved newspapers, which can add $50 to $1,800 to your first-year cost depending on the county where the LLC is based. Idaho has no publication requirement.

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 Arizona or Idaho 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.

Arizona vs Idaho LLC comparison

Arizona charges $50 to form an LLC; Idaho charges $100. 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, Arizona runs about $50 less in total state fees than Idaho. Whether that gap matters depends on whether you actually operate in one of these states or are weighing a non-resident filing.

On speed, Idaho typically clears standard online filings faster than Arizona. 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

Arizona $50

Idaho $100

Arizona saves $50

Year 1 total estimate

Arizona $150

Idaho $200

Arizona saves $50

Ongoing per year

Arizona $100

Idaho $100

Tied

3-year total

Arizona $350

Idaho $400

Arizona saves $50

Key differences at a glance

Arizona costs $50 less to form ($50 vs $100).
Arizona requires newly formed LLCs to publish a formation notice in local newspapers; this can add $50 to $1,800 depending on county.
Arizona has no annual report filing at all. Idaho requires an annual (or biennial) report every reporting period.

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 Arizona

No annual report

Only Idaho

No publication requirement

Both states

Online filing
Paid expedited tier
No entity-level franchise or LLC tax
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.

Arizona Idaho

Year 1

$150

$200

Year 2

$250

$300

Year 3

$350

$400

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 Arizona, business operates there No foreign LLC registration needed. You pay Arizona fees only.	$150	$100	$350
You live in Idaho, business operates there No foreign LLC registration needed. You pay Idaho fees only.	$200	$100	$400
Non-resident forming in Arizona with operations elsewhere You pay Arizona's fees plus a typical home-state foreign LLC registration of about $200 per year.	$350	$300	$950
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

Arizona vs Idaho: full comparison

Dimension	Arizona	Idaho
Online filing Can you file the formation document online?	Yes	Yes
Online approval time Standard, non-expedited	14 business days	7 business days
Expedited option Paid fast-track filing	$35	$40
Annual report Required in addition to tax	None	Required, $0
State-imposed annual tax Franchise, privilege, or LLC tax minimum	None	None
State income tax On pass-through LLC income at member level	Yes	Yes
Publication requirement Newspaper publication after formation	Required	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	$150	$100
State sales tax General statewide rate	5.6%	6.0%

Taxes in Arizona and Idaho

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.

Arizona tax

No entity-level franchise tax on LLCs. State income tax applies to member-level pass-through income. Corporate rate 4.9%.

Idaho tax

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

Ongoing compliance

The recurring filings each state requires after formation.

Arizona

No annual state filing. Registered agent required in Arizona.

Idaho

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

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.

Arizona

Prepare a publication-ready notice (required in Arizona).
Check business-name availability on the Arizona entity search.
Appoint a registered agent with a physical Arizona street address.
File Articles of Organization (Form L010) for $50.
Wait for approval. Online typically 14 business days. Paid expedite from $35.
Adopt an operating agreement (recommended, not required by Arizona statute).
Apply for a federal EIN (free from the IRS).
Open a business bank account to separate personal and business finances.
No annual state filing required in Arizona.

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.

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 Arizona and Idaho (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 Arizona or Idaho 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

Arizona Corporation Commission - Corporations Division

Website: azcc.gov/corporations/home
Phone: (602) 542-3026
Email: answers@azcc.gov
Mail: Arizona Corporation Commission, Corporations Division, 1300 West Washington Street, Phoenix, AZ 85007-2996
Office: Arizona Corporation Commission, 1300 West Washington Street, Phoenix, AZ 85007-2996
Hours: 8:00 AM to 5:00 PM Mountain, Monday to Friday

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

Arizona Department of Revenue

Website: azdor.gov
Phone: (602) 255-3381
Mail: Arizona Department of Revenue, 1600 W Monroe St, Phoenix, AZ 85007
Office: 1600 W Monroe St, Phoenix, AZ 85007
Hours: 8:00 AM to 5:00 PM Mountain, 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

Frequently Asked Questions

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

Arizona is cheaper at formation ($50) than Idaho ($100). Ongoing costs are also different: $100 vs $100 per year. Total over three years: $350 vs $400.
Can I form an LLC in Arizona if I live in Idaho?

Yes, but your Idaho business will almost certainly need to register as a foreign LLC in Idaho too, which means paying Idaho's foreign registration fee and any ongoing Idaho obligations on top of the Arizona 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 Arizona vs Idaho?

Arizona online: 14 business days; Idaho online: 7 business days. Arizona offers paid expedite from $35. Idaho offers paid expedite from $40.
Which state has lower taxes for an LLC, Arizona or Idaho?

Arizona: state income tax applies to member-level pass-through income, no entity-level franchise or LLC tax. Idaho: 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. Arizona and Idaho 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.
Does Arizona or Idaho have a publication requirement?

Arizona does. New LLCs must publish a formation notice in approved newspapers, which can add $50 to $1,800 to your first-year cost depending on the county where the LLC is based. Idaho has no publication requirement.
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 Arizona or Idaho 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

ArizonaOpen Arizona LLC guide →
IdahoOpen Idaho LLC guide →

More Arizona and Idaho comparisons

More Arizona vs ...

More Idaho vs ...

Sources

Filing fee: azcc.gov/docs/default-source/corps-files/fee-schedules/fee-schedule-ll… · verified April 21, 2026
Arizona Corporation Commission Schedule of Fees - Limited Liability Companies (A.R.S. Title 29), Rev. 3.2026. 'Articles of Organization' = $50 regular, $85 expedited (the $85 figure is the total, i.e. $50 base + $35 expedited surcharge).
Expedited filing: azcc.gov/docs/default-source/corps-files/fee-schedules/fee-schedule-ll… · verified April 21, 2026
Regular expedited processing for Articles of Organization totals $85 ($35 surcharge on top of the $50 base fee) and is generally completed within 3-5 business days. Arizona also offers Same Day/Next Day Accelerated Processing on top of expedited: Next Day = $100, Same Day = $200, 2-Hour = $400. We record the cheapest expedited tier (the $35 surcharge, approx 5 business days) in the struct.
Foreign LLC registration fee: azcc.gov/docs/default-source/corps-files/fee-schedules/fee-schedule-ll… · verified April 21, 2026
Foreign Registration Statement = $150 regular, $185 expedited. We record the regular fee.
Operating agreement requirement: www.azleg.gov/ars/29/03105.htm · verified April 21, 2026
A.R.S. §29-3105 (Arizona Limited Liability Company Act) recognizes an operating agreement as the governing document among members and permits it to be oral, written, implied, or any combination. There is no statutory requirement that an LLC adopt an operating agreement, so this is recorded as not required.
Publication requirement: www.azleg.gov/ars/29/03201.htm · verified April 21, 2026
A.R.S. §29-3201(G) requires newspaper publication of the notice of LLC formation in the county of the statutory agent's street address for three consecutive publications within 60 days after filing the Articles of Organization, unless the statutory agent's street address is in a county with a population of more than 800,000, in which case the Commission inputs the notice into its public notice database. Only Maricopa County and Pima County exceed that population threshold, so LLCs with statutory agents in those two counties are exempt (covering roughly 75% of Arizona's population). LLCs in the remaining 13 counties must arrange publication; typical newspaper cost is $60-$120.
Franchise tax: azdor.gov/forms/corporate-income-tax-highlights · verified April 21, 2026
Arizona has no franchise tax on LLCs or corporations. The Arizona Department of Revenue levies only a corporate income tax (4.9% on C-corp taxable income, $50 minimum) and the Transaction Privilege Tax (a gross-receipts-style sales tax at 5.6% statewide plus local rates), neither of which functions as a traditional franchise tax.
Corporate income tax rate: azdor.gov/forms/corporate-income-tax-highlights · verified April 21, 2026
Arizona corporate income tax is a flat 4.9% of Arizona taxable income (A.R.S. §43-1111) with a $50 minimum tax. LLCs are pass-through by default and do not owe corporate income tax unless they elect to be taxed as a C-corp. Recorded here for the maxCorporateRate informational field.
Sales tax rate: azdor.gov/business/transaction-privilege-tax · verified April 21, 2026
Arizona's statewide Transaction Privilege Tax (TPT) rate is 5.6%. TPT is technically a tax on the vendor's privilege of doing business rather than a consumer sales tax, but it functions as the state's sales tax. Counties and municipalities add their own TPT rates, with combined effective rates commonly ranging 7.5% to 11.2% across Arizona. Only the 5.6% statewide rate is recorded in salesTaxRate.
Business name search: arizonabusinesscenter.azcc.gov/businesssearch · verified April 21, 2026
The Arizona Corporation Commission retired the legacy eCorp system on January 12, 2026 and replaced it with the Arizona Business Center (ABC). The ABC portal hosts the current public business entity search and online filing system. The previous ecorp.azcc.gov URLs no longer resolve.
Online filing portal: arizonabusinesscenter.azcc.gov/homepage · verified April 21, 2026
Arizona Business Center is the ACC's official online business filing portal as of January 12, 2026. Articles of Organization, foreign registrations, and most maintenance filings are submitted here. Approval times are generally 12-15 business days for regular online filings, faster with the expedited surcharge.
Certificate of Formation name: www.azcc.gov/docs/default-source/corps-files/forms/l010-articles-of-or… · verified April 21, 2026
Form L010 - Articles of Organization (domestic LLC). Filers using the online Arizona Business Center portal complete an equivalent on-screen form. Instructions are published at azcc.gov as form L010i.
Annual report: www.azcc.gov/corporations/forms/llc-forms · verified April 21, 2026
Unlike Arizona corporations, Arizona LLCs do not file an annual report. The Arizona Corporation Commission's LLC forms page lists no annual report form for LLCs, and the LLC fee schedule does not include an annual report fee. This is confirmed by A.R.S. Title 29, Chapter 7, which imposes no annual report duty on LLCs.
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.

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