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Updated 2025 Tax Year

Rio Arriba County
Property Tax Guide

Everything you need to know about property taxes in Rio Arriba County, NM. Rates, due dates, exemptions, and how it affects your monthly payment.

10 Official Sources
8 min read
Quick Facts
Tax Rate
0.85% base rate, varies significantly by special taxing districts (school, fire, hospital districts)
1st Due
Nov 10
2nd Due
Apr 10
Exemptions
4+ Available
Section 1

How Property Tax Works

Rio Arriba County's property tax system is the primary funding mechanism for essential local services including education, public safety, infrastructure maintenance, and county operations. Property owners pay taxes based on their property's assessed value multiplied by the applicable tax rate for their specific location within the county. The overall tax rate for Rio Arriba County is approximately 0.85% for the 2025 levy year, though this represents a composite rate that varies significantly by location due to special taxing districts.

Your actual property tax rate depends on which special taxing districts serve your property, such as school districts, fire districts, hospital districts, and other municipal service areas. These additional levies can cause the effective tax rate to vary considerably across different areas of Rio Arriba County. Property taxes in New Mexico are assessed annually based on market value, with residential properties typically assessed at approximately one-third of their market value.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
County General Fund~0.25%Basic county services, administration, roads
School Districts~0.35%Local school district operations and bonds
Regional Education Cooperative~0.10%Educational support services
Special Districts~0.15%Fire, hospital, water, and other local districts
Total Composite Rate~0.85%Combined rate for FY 2025-2026

Note: These rates are estimates for the 2025-2026 levy year. Your actual rate will vary based on the specific combination of taxing districts that serve your property location. Contact the Rio Arriba County Assessor's Office for your property's exact rate calculation and applicable special district assessments.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Rio Arriba County, property taxes are due in two installments:

First Installment
Nov 10
Delinquent after Dec 10
Second Installment
Apr 10
Delinquent after Apr 10
Pro tip: If you pay through mortgage escrow, your lender splits these payments across your monthly mortgage. If you pay directly, set calendar reminders to avoid late penalties.
Section 4

Supplemental Tax Bills

Supplemental taxes in Rio Arriba County are additional property tax bills issued when there are changes in property ownership, new construction, or improvements that increase a property's assessed value mid-year. These taxes cover the difference between the old and new assessed values for the remaining portion of the tax year.

Common triggers include purchasing a home, completing major renovations, adding structures like garages or pools, or subdividing property. For example, if you purchase a $400,000 home in March that was previously assessed at $300,000, you would receive a supplemental tax bill for the increased assessed value ($100,000 difference) prorated from March through the end of the tax year. The supplemental bill would be calculated as: ($100,000 ÷ 3 assessment ratio) × 0.85% tax rate × 9 months remaining ÷ 12 months = approximately $213.

Example Calculation

$300,000 Home Value:

  • Assessed Value: $100,000 (33.3% of market value)
  • Less: Homestead Tax Credit: -$2,000 (if applied for)
  • Net Taxable Value: $98,000
  • Annual Tax: $98,000 × 0.85% = $833
  • Monthly Escrow: $69

$600,000 Home Value:

  • Assessed Value: $200,000 (33.3% of market value)
  • Less: Homestead Tax Credit: -$2,000 (if applied for)
  • Net Taxable Value: $198,000
  • Annual Tax: $198,000 × 0.85% = $1,683
  • Monthly Escrow: $140

$1,000,000 Home Value:

  • Assessed Value: $333,000 (33.3% of market value)
  • Less: Homestead Tax Credit: -$2,000 (if applied for)
  • Net Taxable Value: $331,000
  • Annual Tax: $331,000 × 0.85% = $2,814
  • Monthly Escrow: $234

Note: These calculations assume the homestead tax credit has been applied for and approved. Tax credits are not automatic and require annual application to the County Assessor's Office.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Rio Arriba County require borrowers to maintain an escrow account for property taxes and insurance. Your lender collects 1/12th of your estimated annual property tax bill with each monthly mortgage payment, then pays your tax bills directly to the county when they become due. Lenders typically collect an initial escrow deposit at closing equal to 2-4 months of taxes and insurance.

Property taxes are due in two installments: the first half is due November 10th, and the second half is due April 10th of the following year. Your lender will make these payments automatically from your escrow account. Each year, your lender conducts an escrow analysis to ensure adequate funds are available, which may result in an increase or decrease to your monthly payment. You can verify that payments have been made by checking with the Rio Arriba County Treasurer's Office or reviewing your annual escrow statement from your lender.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
  • Plan ahead instead of being surprised by "shortage" letters
Section 6

Frequently Asked Questions

Q: When are property taxes due for the current fiscal year? A: For FY 2025-2026, the first installment is due November 10, 2025, and the second installment is due April 10, 2026.

Q: What tax credits are available and how do I apply? A: The primary credit is the Homestead Tax Credit, which can reduce your taxable assessed value by up to $2,000 annually. Additional credits may be available for veterans, seniors, and disabled persons. All credits require annual application through the Rio Arriba County Assessor's Office, typically due by March 1st.

Q: How does the Homestead Tax Credit work? A: The Homestead Credit limits annual assessment increases to 10% and provides up to $2,000 in assessed value reduction. It does NOT reduce your home's market value but caps how much your assessed value can increase year-over-year. You must file an application annually to maintain this benefit.

Q: When are properties reassessed and how can I appeal? A: Properties are revalued annually with new assessments typically mailed in April. You have 30 days from the postmark date to file an appeal with the County Assessor's Office if you disagree with your assessed value.

Q: What are the penalties for late payment? A: A 1% penalty is added on the day after the due date, followed by an additional 1% penalty each month thereafter. Interest accrues at 1% per month on the unpaid balance.

Q: Can I pay my property taxes online? A: Yes, Rio Arriba County offers online payment options through their official website. You can pay by electronic check or credit card, though credit card payments may include processing fees.

Q: Why is my tax rate different from my neighbor's? A: Tax rates vary based on the special taxing districts that serve your specific property location. Different areas may have different school districts, fire districts, or other special assessments that affect the total rate.

Q: What happens if I receive a supplemental tax bill? A: Supplemental bills are due 30 days from the issue date and cannot be paid through your mortgage escrow account. You must pay these directly to the county treasurer to avoid penalties and potential tax lien placement.

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