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New Mexico—Company Registration

Learn how to register a new business in New Mexico and comply with tax requirements.

Rachel avatar
Written by Rachel
Updated this week

Overview: When hiring employees in New Mexico, you must register for Withholding Tax, the Workers’ Compensation Fee, and Unemployment Insurance (UI) Tax. The New Mexico Taxation and Revenue Department and the Department of Workforce Solutions manage these registrations. Employers with three or more employees are also required to carry a Workers’ Compensation insurance policy, in addition to paying the state fee.

Important! This guide does not constitute legal or tax advice. You can consult a CPA or attorney for official guidance.

Taxes You Must Register For:


New Mexico Withholding Tax and Workers' Compensation Fee

Registration Steps

Register for a New Mexico Business Tax Identification Number and Workers’ Compensation Fee

  • Under Businesses, click Apply for a New Mexico Business Tax ID and complete the registration steps.

  • During this registration, you will also enroll in the Workers’ Compensation Fee program.

  • A TAP account will be created during the process. Log in post-approval at TAP.

Workers' Compensation Requirements

  • All employers with 3 or more employees (including part-time, leased, or temporary) must carry Workers’ Compensation insurance.

  • The fee is not the same as insurance coverage. Employers must still obtain a workers’ compensation insurance policy.


Unemployment Insurance Tax (UI)

Registration Steps

  1. Register for a New Mexico UI Employer Account Number

  2. Create a UI System Login

    • After receiving your Employer Account Number:

      • Visit the UI System

      • Click Employer Login

      • Enter your UI credentials to access your account.

Third-Party Administrator (TPA) Access

  • Click UI System Login

  • Log in with your credentials

  • Select Account Maintenance > TPA Authorization

  • Click New, and enter Check’s TPA ID: 500002855

  • Assign the following roles:

    • Account Maintenance View Only

    • Payments Update and Submit

    • Employment Wage Detail Update and Submit

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