Rate Breakdown

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

How Property Tax Works in Rio Grande County

Each year the Rio Grande County Assessor’s Office determines the taxable value of every parcel of real and personal property within the county. The process begins with a market‑value appraisal, which reflects what the property would sell for on the open market as of January 1 of the tax year. That market value is then adjusted by any applicable exemptions (see the section below) and multiplied by the county‑wide millage rate to produce the final tax bill.

The millage rate is expressed in mills, where one mill equals one‑tenth of one percent (0.001). Rio Grande County’s total mill rate combines the county levy (road, bridge, and law‑enforcement funding), school district levies, special districts, and any voter‑approved bonds. For the 2024‑2025 tax year, the combined rate is approximately 46.2 mills (or $46.20 per $1,000 of assessed value). The actual amount you owe may vary slightly if your property falls within a special district with a different rate.

Available Exemptions

Colorado law provides several exemptions that reduce the taxable portion of your property’s assessed value. Rio Grande County applies these uniformly, but you must file the appropriate paperwork to receive the benefit.

• Homestead Exemption: Reduces the taxable value of a primary residence by up to $250,000 (or $500,000 for qualifying seniors or disabled owners). An application is required, and the exemption renews automatically each year if no change in ownership occurs.
• Senior Citizen Exemption: Residents age 65 or older, or those receiving a total yearly income of $30,000 or less, may qualify for an additional $250,000 exemption beyond the standard homestead benefit.
• Disability Exemption: Owners with a qualifying physical or mental disability can claim the same $250,000 exemption as seniors, provided the disability is documented by a licensed physician.
• Veteran Exemption: Colorado offers a $5,000 exemption to qualifying veterans or their surviving spouses. Those who served in combat zones may receive an additional $7,000 exemption.

All exemption forms are available on the Colorado Department of Revenue website or at the Rio Grande County Assessor’s office. Submit them by the filing deadline (generally March 1) to ensure they apply to the upcoming tax year.

Payment Schedule & Deadlines

Rio Grande County follows the statewide two‑installment schedule for property taxes:

• First installment: Due on March 1. A discount of 5 % (or 10 % for qualified seniors) is offered if paid by the due date.
• Second installment: Due on September 1. No discount is available, but payment must be made to avoid penalties.

If you choose to pay the entire bill in one lump sum, the March 1 due date still applies. Late payments incur a 1 % penalty per month (or any fraction thereof) and an additional $10 per delinquent bill. Persistent non‑payment may result in a tax lien, tax sale, or collection proceedings.

Appealing Your Assessment

If you believe your property’s assessed value is inaccurate, you have the right to appeal. The process in Rio Grande County is as follows:

• Review your notice: The assessment notice is mailed in early February. Verify the market value, exemption claims, and any calculation errors.
• File a petition: Submit a written appeal to the Rio Grande County Assessor’s Office by the statutory deadline—usually July 15 of the tax year. Include supporting evidence such as recent comparable sales, independent appraisals, or photographs.
• Informal hearing: The assessor will schedule an informal hearing where you can present your case. A written decision follows within 30 days.
• Formal appeal: If the informal decision is unsatisfactory, you may appeal to the Colorado Board of Assessment Appeals (BOAA) by filing a Notice of Appeal within 30 days of the assessor’s decision.

Throughout the process, maintain copies of all correspondence and documentation. Engaging a qualified property tax consultant or attorney can improve the likelihood of a favorable outcome.