New Mexico Workers' Compensation: Who Must Carry It and the WC Fee Filed With TRD

If you are forming a business in New Mexico, workers' compensation is one of the first compliance questions you will face, and it is one of the most misunderstood. The short version: a New Mexico LLC or corporation is expected to carry coverage at any headcount, a licensed contractor needs it at any headcount, and other employers must carry it once they reach three or more employees. Separately, covered employers pay a fee that the Taxation and Revenue Department (TRD) collects. The fee is not insurance, and paying it does not satisfy the coverage requirement.

This guide explains the New Mexico workers compensation requirements for each business type, how the WC fee is reported, and where to confirm the details. It is informational content, not legal or tax advice. Coverage questions depend on your exact facts, so confirm your situation with the Workers' Compensation Administration (WCA) or a qualified attorney before you hire.

Who must carry workers' compensation in New Mexico

The WCA Employer Compliance Bureau identifies three groups that need coverage. Each one stands on its own, so meeting any one of them means you must carry a policy.

1. Licensed contractors (any headcount)

Contractors licensed under the Construction Industries Licensing Act must carry coverage regardless of how many workers they have, including none. If you hold or plan to hold a construction license, treat coverage as part of licensing readiness rather than as a decision you make when you first hire.

2. LLCs and incorporated businesses

Any business registered as a limited liability company or incorporated is expected to carry coverage, whatever its headcount. This is the rule founders miss most often. Forming an LLC costs $50 for the Articles of Organization, but the filing fee is the cheap part. Once the entity exists, a policy may be required even if you have not hired anyone yet. The bureau notes that some exceptions may apply, so ask before you assume you are exempt. Contact [email protected] or (505) 841-6000.

3. Businesses with three or more employees

Under NMSA 52-1-6, a business with three or more employees must carry workers' compensation. This headcount rule is what matters most for sole proprietors and general partnerships that have not formed an LLC or corporation.

Fewer than three employees: the election option

An employer with fewer than three employees may elect coverage. A two-person shop that wants the protection of a policy can buy one. Electing coverage is voluntary, but once you are covered, the policy and the WC fee obligations apply in the same way as for any other covered employer.

Common scenarios

The rules are easier to apply to real situations. The table below shows how the three triggers typically sort common setups. The "likely outcome" column is a starting point, not a determination, and every row needs confirmation with WCA.

Situation	Likely outcome
Single-member LLC, no employees, not a licensed contractor	Coverage expected because the entity is an LLC. Ask WCA whether an exception applies.
Sole proprietor, two part-time employees, not licensed	Below the three-employee trigger. Coverage is optional, but confirm how WCA counts part-time workers.
Licensed electrician with one helper	Coverage required because of the contractor license, regardless of headcount.
Sole proprietor with four seasonal workers	Three-or-more trigger met. Confirm how seasonal workers are counted.
Corporation with only the owner working	Corporation rule applies. Confirm the exception and how working owners are treated.

Exclusions and unclear counting rules

The statute excludes private domestic servants. Older TRD instructions also list real estate salespeople as excluded. If you run a brokerage or sell real estate, confirm the current treatment with WCA before you rely on the older instructions.

Headcount is where most small businesses get stuck. Part-time, seasonal and temporary workers, and working owners, may be counted differently from full-time staff. Do not assume a simple payroll count settles the question. Ask the bureau how each category is counted before you decide whether you are over or under the three-employee line.

Buying the policy

Every covered employer must buy a workers' compensation insurance policy. Paying the WC fee does not replace the policy, and a policy does not replace the fee. Premiums depend on your payroll and on how each job is classified, so get quotes from carriers that write New Mexico business rather than estimating from another state's costs. Keep the policy on file, because you will need proof of coverage when you bid on work or are audited.

The WC fee: NMSA 52-5-19 and form TRD-41431

Separate from coverage, New Mexico charges a fee that funds WCA administration. The fee is set by NMSA 52-5-19 and collected by the Taxation and Revenue Department. Covered employers and covered employees each pay a share. For the period from July 1, 2025 to before July 1, 2028, the amounts are:

Share	Amount per worker	Who pays
Employer share	$2.55	The covered employer
Employee share	$2.25	The covered employee

The fee is reported on form TRD-41431, the Workers' Compensation Fee Return, and filed quarterly. Get the current form from the TRD website at https://www.tax.newmexico.gov/ rather than using an old copy saved on your computer. Before your first filing, confirm with TRD the period over which the per-worker amount is computed and how the employee share is collected and reported. The form instructions control those details.

What the fee is not

The WC fee is an administrative charge. It funds WCA administration, but it does not buy you coverage and does not show that a policy is in force. New owners often pay the fee on time and assume they are covered. They are not, unless a policy is also in place.

Compared with other states

If you formed a business somewhere else, you may remember a five-employee threshold, which some states use. New Mexico works differently. The rule turns first on entity type and contractor licensing, and second on the three-employee trigger. An LLC in New Mexico may need a policy with no employees at all, while a sole proprietor with two workers may not. Do not carry a threshold from another state into a New Mexico decision.

Steps to take before you hire

1. Confirm your entity type and filing status with the Secretary of State at https://enterprise.sos.nm.gov/. New Mexico LLCs file no annual or biennial report, but the formation filing and its requirements still apply.
2. Check whether you hold, or need, a license under the Construction Industries Licensing Act.
3. Write down your expected headcount, including part-time, seasonal and temporary workers, and ask WCA how each category is counted.
4. Email [email protected] or call (505) 841-6000 to confirm whether any exception applies to your business.
5. Buy a policy before the first covered worker starts, and keep the proof of coverage on file.
6. Register with TRD for a Business Tax Identification Number (BTIN). The BTIN is free, but it is a tax registration, not a license. Then calendar the quarterly TRD-41431 filings.

Local rules still apply

New Mexico has no state general business license. Cities and some counties may charge their own flat annual registration, so check with the city or county where you operate. Activity-specific licenses come through the Regulation and Licensing Department. For help working through these questions, the New Mexico Small Business Development Center at https://www.nmsbdc.org/ offers business advising.

Where to confirm the details

• WCA Employer Compliance Bureau: [email protected] or (505) 841-6000, for coverage, exceptions and headcount questions.
• Taxation and Revenue Department: https://www.tax.newmexico.gov/, for form TRD-41431, the quarterly WC fee and the BTIN.
• Secretary of State: https://www.sos.nm.gov/business-services/, for entity filings and fees.

Disclaimer and when to get professional help

This article is informational only. It is not legal or tax advice, and reading it does not create an attorney-client or accountant-client relationship. Workers' compensation coverage and fee obligations turn on specific facts, and the figures and rules described here can change. Confirm your obligations with WCA and TRD, and consult a New Mexico attorney or a qualified CPA before you hire, restructure or change your entity type.