Rate Breakdown

Property taxes in Union County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.

How Property Tax Works in Union County

Property taxes in Union County, New Mexico, are determined by a combination of the property's assessed value and the local millage rates. The process begins with the County Assessor, who determines the market value of a property. This value is then multiplied by a state-mandated assessment rate to determine the taxable value.

The actual tax amount is calculated using "mills." A mill represents one-tenth of a cent per dollar of taxable value. Different taxing jurisdictions—including the county, school districts, and municipal governments—each set their own millage rates. These rates are subject to change annually based on the approved budgets of these local entities.

Available Exemptions

New Mexico offers several tax relief programs to reduce the financial burden on eligible homeowners. These exemptions lower the taxable value of the property, thereby reducing the overall tax bill.

• Head of Family Exemption: Available to homeowners who are the head of their household, providing a significant reduction in taxable value.
• Veteran's Exemption: Available to honorably discharged veterans or surviving spouses, depending on service status and disability levels.
• Senior Citizen & Disability Exemptions: Specific tax credits and freezes may be available for residents over 65 or those with permanent disabilities to prevent sudden tax spikes.

Payment Schedule & Deadlines

Property taxes in Union County are typically billed annually. It is critical to adhere to the payment schedule to avoid unnecessary costs.

• Deadlines: Tax bills are generally mailed in the fall. Payments are typically due by the end of the calendar year, though specific deadlines can vary by jurisdiction.
• Installments: While most taxes are paid in a single lump sum, some taxpayers may request payment plans through the County Treasurer's office.
• Late Consequences: Failure to pay by the deadline results in late penalties and interest. If taxes remain unpaid for an extended period, the property may be subject to a tax lien or foreclosure.

Appealing Your Assessment

If you believe your property has been overvalued by the Assessor's office, you have the right to appeal. The appeals process must be initiated within a specific window—usually shortly after the notice of value is mailed.

To begin an appeal, you must file a formal request with the Union County Board of Equalization. It is recommended to provide supporting evidence, such as recent appraisals of your home or data on comparable properties in your immediate neighborhood that have sold for less than your assessed value. The board will review the evidence and determine if an adjustment to the valuation is warranted.