New Mexico LLC Tax Filing Requirements (2026)

Fact-checked by the LegalGlass editorial team against primary sources · Published Aug 6, 2026 · Last updated Aug 6, 2026

A New Mexico LLC is taxed by federal default as a disregarded entity (single owner) or a partnership (multiple owners), so profit passes through to the members, who report it on the New Mexico personal income tax return (PIT-1). An LLC can instead elect S-corp treatment on IRS Form 2553. Separately, New Mexico imposes a gross receipts tax - not a traditional sales tax - on the business's receipts.

Federal Default Tax Classification for a New Mexico LLC

An LLC is a state-law entity, and the federal tax code does not have a dedicated "LLC" tax class. Instead, the IRS applies default classifications under the check-the-box rules. A New Mexico LLC with one member is, by default, a disregarded entity - the IRS looks through it and taxes its activity on the owner's own return, typically Schedule C with Form 1040. A New Mexico LLC with two or more members is, by default, a partnership, which files Form 1065 and issues Schedule K-1s to the members, who report their shares on their own returns. See single-member LLCs and our business tax overview for background.

Either way, the default is pass-through taxation: the LLC generally pays no federal income tax at the entity level, and the profit is taxed once, in the members' hands. That federal classification is the starting point for New Mexico too, because New Mexico income tax builds on federal taxable income. Members who are individuals also owe federal self-employment tax of 15.3% on their share of active business earnings. Understanding your default class is the first step, because it determines which New Mexico and federal returns you file - and whether an election makes sense.

Electing S-Corp or C-Corp Treatment

An LLC can change its federal tax treatment by election. Filing IRS Form 8832 elects to be taxed as a C corporation, which is a separate taxpayer that files its own return and pays tax at the entity level. Filing IRS Form 2553 elects S corporation status, a pass-through that can reduce self-employment tax on a portion of profit paid out as distributions rather than salary. The S-corp election generally must be filed within 2 months and 15 days after the beginning of the tax year in which it is to take effect. Compare the trade-offs in S-Corp vs LLC.

New Mexico generally follows the federal election: an LLC taxed federally as an S corporation is treated as a pass-through for New Mexico purposes and files the applicable New Mexico pass-through/S-corporation return, while an LLC taxed as a C corporation files and pays New Mexico corporate income tax. An S corporation must pay owner-employees a reasonable salary subject to payroll tax, so the strategy only makes sense at a certain profit level. Because the election changes which returns you file at both levels, confirm the current New Mexico filing requirements with the Taxation and Revenue Department before you elect.

New Mexico Income Tax (Personal and Corporate)

How New Mexico taxes your LLC's income follows its federal classification. When the LLC is a pass-through - the default, or after an S-corp election - the members pay New Mexico personal income tax on their shares of the profit on the PIT-1 return, regardless of whether the cash was distributed. New Mexico personal income tax is calculated at graduated rates on New Mexico taxable income, which starts from federal figures. Members typically make estimated payments during the year if enough tax is not otherwise paid in.

When an LLC has elected to be taxed as a C corporation, it instead files a New Mexico corporate income tax return and pays tax at the entity level; its owners are then taxed again on dividends they receive, the classic "double taxation" of a C corporation. Most small New Mexico LLCs keep pass-through treatment to avoid that second layer. Because rates, brackets, and forms are updated periodically, verify the current New Mexico personal and corporate income tax rates and return forms with the Taxation and Revenue Department rather than relying on a figure you saw elsewhere.

New Mexico Gross Receipts Tax (Not a Sales Tax)

New Mexico is unusual in that it does not have a traditional sales tax. Instead, it imposes a gross receipts tax (GRT) on the seller for the privilege of doing business in the state. Legally the tax is on the business's gross receipts, though in practice sellers usually pass it through to customers as a separately stated amount, so it looks like a sales tax at the register. The GRT applies broadly - to sales of most goods and many services - which is wider than a typical sales tax that covers only tangible goods.

The gross receipts tax is administered by the New Mexico Taxation and Revenue Department. The rate you charge depends on your business location because it combines a statewide rate with local option increments, so two addresses can have different combined GRT rates. Certain receipts are deductible or exempt, and some sales use a nontaxable transaction certificate. Because rates change twice a year and location matters, look up the current combined rate for your business location on the Department's rate schedule, and see our business licensing overview for related permits.

Registering, Forms, and Due Dates

To handle these taxes, a New Mexico LLC first registers with the Taxation and Revenue Department and obtains a Business Tax Identification Number (BTIN). You register - and later file and pay - through the Department's Taxpayer Access Point (TAP), its online portal. You will also want a federal EIN from the IRS, which is free, before you register at the state level and open a bank account.

The forms and due dates depend on how the LLC is taxed and what it sells. Gross receipts tax is filed on a monthly, quarterly, or seasonal cycle that the Department assigns based on your reporting history and volume. Income tax returns follow the federal calendar - New Mexico personal income tax returns generally track the April 15 federal deadline, and entity returns have their own due dates. Because filing frequency, exact form numbers, and deadlines can change and depend on your facts, confirm them on the Taxation and Revenue Department's forms and instructions before you file, and keep copies of every return with your records.

Pass-Through Entities and Owner Withholding

New Mexico has special rules for pass-through entities - partnerships and S corporations, including LLCs taxed that way - that have owners who are not New Mexico residents. In general, a pass-through entity may be required to withhold New Mexico income tax on the net income allocable to its non-resident owners and remit it to the state, so that New Mexico collects tax on income earned in the state even when the owner lives elsewhere. The entity reports each owner's share and the tax withheld on the applicable New Mexico information return and owner statements.

These pass-through rules interact with the members' own PIT-1 returns: amounts withheld by the entity are credited against what the member owes. New Mexico has also, like many states, provided for entity-level tax elections in some circumstances that can affect how pass-through income is reported. Because these provisions are detailed and change with legislation, a multi-member New Mexico LLC - especially one with out-of-state members - should confirm the current withholding and entity-level filing requirements with the Taxation and Revenue Department or a tax professional. See New Mexico registered agent and how to form an LLC in New Mexico for related compliance steps.

Frequently Asked Questions

How is a New Mexico LLC taxed?

By federal default a single-member LLC is a disregarded entity and a multi-member LLC is a partnership, so profit passes through to the owners. New Mexico taxes that income on the owners' New Mexico personal income tax return (PIT-1). An LLC can instead elect S-corp or C-corp treatment.

Does New Mexico have a sales tax?

New Mexico does not have a traditional sales tax. Instead it imposes a gross receipts tax (GRT) on the seller for the privilege of doing business in the state. Sellers generally pass the GRT on to customers, and it is reported to the New Mexico Taxation and Revenue Department.

Does a New Mexico LLC pay state income tax?

The LLC itself usually pays no entity-level income tax when taxed as a pass-through; the members pay New Mexico personal income tax on their shares. An LLC that elects to be taxed as a C corporation instead files and pays New Mexico corporate income tax.

How do I register a New Mexico LLC for gross receipts tax?

Register with the New Mexico Taxation and Revenue Department to obtain a Business Tax Identification Number (BTIN). You then report and pay gross receipts tax on the schedule the Department assigns. Registration is available through the Department's Taxpayer Access Point online system.

Can a New Mexico LLC be taxed as an S corporation?

Yes. An LLC can elect S corporation treatment for federal tax by filing IRS Form 2553, generally within 2 months and 15 days of the start of the tax year. New Mexico recognizes the federal election, and the entity files the applicable New Mexico pass-through or S-corp return.

When are New Mexico LLC tax returns due?

New Mexico personal income tax returns generally follow the federal April 15 deadline, and gross receipts tax is filed on a monthly, quarterly, or seasonal cycle assigned by the Department. Confirm the exact due dates and filing frequency with the Taxation and Revenue Department.

Related

• Business tax (cluster hub)
• How to form an LLC in New Mexico
• New Mexico registered agent
• S-Corp vs LLC
• How to get an EIN
• Single-member LLC taxation
• Self-employment tax calculator

Sources

1. New Mexico Taxation & Revenue - Gross Receipts Tax Overview (GRT, not a sales tax).
2. New Mexico Taxation & Revenue - Register Your Business (BTIN).
3. New Mexico Taxation & Revenue - Gross Receipts Location Code and Tax Rate Map.
4. New Mexico Taxation & Revenue - Personal Income Tax (PIT-1).
5. New Mexico Taxation & Revenue - Corporate Income Tax Overview.
6. New Mexico Taxation & Revenue - Pass-Through Entity Withholding.
7. New Mexico Taxation & Revenue - Forms & Publications.
8. New Mexico Secretary of State - Start a Business.
9. Justia - New Mexico Statutes, Chapter 7, Article 9 (Gross Receipts and Compensating Tax).
10. Justia - New Mexico Statutes, Chapter 7, Article 2 (Income Tax).
11. IRS - Limited Liability Company (LLC) (default classification).
12. IRS - About Form 2553 (S corporation election).
13. IRS - About Form 8832 (entity classification election).
14. IRS - Get an Employer Identification Number (free EIN).
15. Cornell LII - 26 CFR 301.7701-3 (entity classification election).

LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. Laws, rates, forms, and due dates change; verify current requirements with the New Mexico Taxation and Revenue Department and the IRS before acting.