Idaho vs New Mexico LLC: fees, taxes, and which to pick
Data last updated: Apr 21, 2026Idaho charges $100 to form an LLC; New Mexico charges $50. 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, New Mexico 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, New Mexico 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.
Key differences at a glance
- New Mexico costs $50 less to form ($50 vs $100).
- New Mexico 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 Idaho
- Paid expedited tier
Only New Mexico
- No annual report
Both states
- Online filing
- 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.
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 New Mexico, business operates there No foreign LLC registration needed. You pay New Mexico fees only. | $150 | $100 | $350 |
| 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 New Mexico with operations elsewhere You pay New Mexico's fees plus a typical home-state foreign LLC registration of about $200 per year. | $350 | $300 | $950 |
Idaho vs New Mexico: full comparison
| Dimension | Idaho | New Mexico |
|---|---|---|
| Online filing Can you file the formation document online? | Yes | Yes |
| Online approval time Standard, non-expedited | 7 business days | 3 business days |
| Expedited option Paid fast-track filing | $40 | Not offered |
| Annual report Required in addition to tax | Required, $0 | None |
| 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 | 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 | $100 |
| State sales tax General statewide rate | 6.0% | 4.9% |
Taxes in Idaho and New Mexico
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%.
New Mexico tax
No entity-level franchise tax on LLCs. State income tax applies to member-level pass-through income. Corporate rate 5.9%.
Ongoing compliance
The recurring filings each state requires after formation.
Idaho
Annual report $0, due on your anniversary month. Registered agent required in Idaho.
New Mexico
No annual state filing. Registered agent required in New Mexico.
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.
New Mexico
- Check business-name availability on the New Mexico entity search.
- Appoint a registered agent with a physical New Mexico street address.
- File Articles of Organization for a Domestic Limited Liability Company for $50.
- Wait for approval. Online typically 3 business days. No paid expedite offered.
- Adopt an operating agreement (recommended, not required by New Mexico 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 New Mexico.
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 New Mexico (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 New Mexico 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
- 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
New Mexico Secretary of State - Business Services Division
- Website
- www.sos.nm.gov/business-services
- Phone
- (505) 827-3600
- Business.Services@sos.nm.gov
- New Mexico Capitol Annex North, 325 Don Gaspar, Suite 300, Santa Fe, NM 87501
- Hours
- 8:00 AM to 5:00 PM Mountain, Monday to Friday (walk-in Business Services closed Fridays; phone and online available)
Idaho State Tax Commission
- Website
- tax.idaho.gov
- Phone
- (208) 334-7660
- 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
New Mexico Taxation and Revenue Department
- Website
- www.tax.newmexico.gov
- Phone
- (866) 285-2996
- New Mexico Taxation and Revenue Department, P.O. Box 630, Santa Fe, NM 87504-0630
- Office
- 1200 South St. Francis Drive, Santa Fe, NM 87504
- Hours
- 8:00 AM to 5:00 PM Mountain, Monday to Friday
Frequently Asked Questions
-
Is it cheaper to form an LLC in Idaho or New Mexico?
New Mexico 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 Idaho if I live in New Mexico?
Yes, but your New Mexico business will almost certainly need to register as a foreign LLC in New Mexico too, which means paying New Mexico's foreign registration fee and any ongoing New Mexico 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 New Mexico?
Idaho online: 7 business days; New Mexico online: 3 business days. Idaho offers paid expedite from $40. New Mexico does not offer paid expedite.
-
Which state has lower taxes for an LLC, Idaho or New Mexico?
Idaho: state income tax applies to member-level pass-through income, no entity-level franchise or LLC tax. New Mexico: 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. Idaho and New Mexico 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 New Mexico 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
More Idaho and New Mexico comparisons
More Idaho 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: law.justia.com/codes/new-mexico/chapter-53/article-19/section-53-19-63… · verified April 21, 2026
NMSA 1978 Section 53-19-63 (Filing, service and copying fees) sets the fee for filing original articles of organization and issuing a certificate of organization at fifty dollars ($50.00). Also referenced in 12.3.4.11 NMAC (Domestic Limited Liability Companies), which directs domestic LLCs to pay applicable fees required in Section 53-19-63. - Foreign LLC registration fee: law.justia.com/codes/new-mexico/chapter-53/article-19/section-53-19-63… · verified April 21, 2026
NMSA 1978 Section 53-19-63 sets the fee for issuing a certificate of registration to a foreign limited liability company at one hundred dollars ($100.00). Foreign LLCs must obtain a certificate of registration under NMSA 1978 Section 53-19-48 before transacting business in New Mexico. - Online filing portal: www.sos.nm.gov/business-services/ · verified April 21, 2026
All New Mexico business filings moved to online-only as of December 9, 2024. The Secretary of State no longer accepts paper filings for any business application. All LLC Articles of Organization must be filed through the SOS Enterprise portal at enterprise.sos.nm.gov. Typical processing time for online filings is 1-3 business days. - Operating agreement requirement: nmonesource.com/nmos/nmsa/en/item/4400/index.do · verified April 21, 2026
NMSA 1978 Chapter 53, Article 19 (the New Mexico Limited Liability Company Act) permits but does not require an LLC to adopt an operating agreement. Section 53-19-19 contemplates operating agreements that may be oral or written. No statutory requirement to adopt or file one exists. - Annual report: www.sos.nm.gov/business-services/ · verified April 21, 2026
The New Mexico LLC Act imposes no annual or biennial report requirement, and the Secretary of State's Business Services fee list contains no annual report line item for LLCs. This absence of annual filing is a long-standing feature of the New Mexico LLC Act and one of the main reasons anonymous-LLC strategies favor New Mexico. - Franchise tax: www.tax.newmexico.gov/businesses/corporate-income-franchise-tax-overvi… · verified April 21, 2026
New Mexico's $50 Corporate Franchise Tax applies to entities taxed as corporations for federal purposes, including LLCs that have elected C-corp or S-corp treatment. LLCs that default to pass-through partnership or disregarded-entity treatment do not owe the $50 franchise tax and file no corporate-level franchise return in New Mexico. For default-tax-classification LLCs (the overwhelming majority), no state-level franchise tax applies. - Corporate income tax rate: www.tax.newmexico.gov/all-nm-taxes/current-historic-tax-rates-overview… · verified April 21, 2026
Effective for tax year 2025 and later, New Mexico replaced its two-bracket corporate income tax (4.8% on the first $500,000 and 5.9% above) with a single flat rate of 5.9% on all corporate taxable income. Confirmed by the Tax Foundation 2026 State Tax Competitiveness Index (Oct 2025) and the NM Taxation and Revenue Department. LLCs pay this rate only if they elect C-corp federal taxation; default pass-through LLCs do not. - Sales tax rate: www.tax.newmexico.gov/businesses/gross-receipts-overview/ · verified April 21, 2026
New Mexico's Gross Receipts Tax (GRT) functions as the state's sales tax. Effective July 1, 2025 the statewide GRT rate is 4.875%. The GRT is imposed on the seller's receipts rather than the buyer's purchase, so it applies more broadly than a typical sales tax (including to many services and business-to-business transactions). Counties and municipalities add layered local GRT rates, resulting in combined rates that typically range from 6.5% to 9%. Only the statewide 4.875% rate is recorded here. - Business name search: enterprise.sos.nm.gov/search · verified April 21, 2026
Current New Mexico Secretary of State business entity search, hosted on the SOS Enterprise portal. The legacy portal.sos.state.nm.us URL used in prior agency seed data no longer resolves after the December 2024 migration to enterprise.sos.nm.gov.