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Updated 2025 Tax Year

Dallam County
Property Tax Guide

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

8 Official Sources
8 min read
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Quick Facts
Tax Rate
Approximately 1.8% of assessed value, varies by taxing district combination
1st Due
Jan 31
Exemptions
4+ Available
Section 1

How Property Tax Works

Dallam County, Texas operates under the state's property tax system, which serves as the primary funding mechanism for local government services, schools, and special districts. Property taxes in Dallam County fund essential services including public education, county operations, emergency services, and various municipal functions. The county follows Texas Property Tax Code requirements, with assessments based on market value and subject to the state's 10% annual assessment increase cap for homestead properties.

Property tax rates in Dallam County vary by location within the county due to different combinations of taxing entities, including the county, school districts, cities, and special districts. The effective tax rate typically ranges around 1.8% of assessed value, though this can vary significantly based on your specific location and the applicable taxing jurisdictions. Property owners should note that most tax credits and exemptions require formal application and are not automatically applied to your tax bill.

Section 2

What Makes Up Your Tax Bill

ComponentEstimated RateDescription
County General Fund~0.3%Basic county services, roads, law enforcement
School District~1.0-1.3%Local school district operations and debt service
City/Municipal~0.2-0.5%City services (varies by municipality)
Special Districts~0.1-0.3%Fire districts, hospital districts, other special purposes
Total Estimated Rate~1.6-2.1%Combined rate varies by location

Note: These are estimated ranges for FY 2025-2026. Actual rates vary significantly based on your specific location within Dallam County and the combination of taxing entities that serve your property. The 2025 voter-approval tax rate includes unused increment rates as determined by local elections. Contact the Dallam County Appraisal District for your exact tax rate combination.

Section 3

When Are Property Taxes Due?

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

First Installment
Jan 31
Delinquent after Dec 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 Dallam County are additional tax bills issued when there are changes to property ownership, improvements, or corrections to assessments during the tax year. Common triggers include new construction completion, property ownership transfers, or discovery of previously unassessed improvements. When supplemental taxes are issued, they are calculated based on the difference between the old and new assessed values, prorated for the portion of the tax year remaining.

For example, if you complete a $50,000 home addition in July and your local tax rate is 1.8%, you would owe supplemental taxes of approximately $450 ($50,000 × 1.8% × 6/12 months remaining in the tax year). Supplemental tax bills are typically issued within 60 days of the triggering event and have separate due dates from your regular property tax bill.

Example Calculation

Example 1: $300,000 Home with Homestead Exemption

  • Market Value: $300,000
  • School District Homestead Exemption: -$100,000
  • Net Taxable Value: $200,000
  • Tax Rate: 1.8%
  • Annual Tax: $3,600
  • Monthly Escrow: $300

Example 2: $600,000 Home with Homestead and Over-65 Exemptions

  • Market Value: $600,000
  • School District Homestead Exemption: -$100,000
  • Additional Local Over-65 Exemption: -$10,000 (estimated)
  • Net Taxable Value: $490,000
  • Tax Rate: 1.8%
  • Annual Tax: $8,820
  • Monthly Escrow: $735

Example 3: $1,000,000 Commercial Property

  • Market Value: $1,000,000
  • No Exemptions Applied: $0
  • Net Taxable Value: $1,000,000
  • Tax Rate: 1.8%
  • Annual Tax: $18,000
  • Monthly Escrow: $1,500

Note: All exemptions require formal application and approval. Contact Dallam County Appraisal District to apply.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Dallam County require property tax escrow accounts to ensure timely tax payments. Your lender collects monthly escrow payments as part of your mortgage payment, typically calculated as your annual tax bill divided by 12, plus a cushion amount. The lender pays your property taxes directly to the county when due, usually by the January 31st deadline.

Lenders are required to provide annual escrow account statements showing deposits, payments, and any shortages or surpluses. If your property taxes increase due to reassessment or rate changes, your monthly escrow payment may be adjusted at your annual escrow review. Property owners can verify that their taxes were paid correctly by checking with the Dallam County Tax Collector's office or accessing records online. If you pay taxes directly without escrow, remember that Texas allows for split payments, with the first installment due by September 1st and the final payment due by January 31st of the following year.

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 in Dallam County for the current fiscal year? A: Property taxes can be paid in installments with the first payment due by September 1st and the final payment due by January 31st of the following year. You can also pay the full amount by January 31st without penalty.

Q: What is the homestead exemption and how do I apply? A: The homestead exemption provides a $100,000 reduction in assessed value for school district taxes on your primary residence. It also caps annual assessment increases at 10%. You must apply with the Dallam County Appraisal District, typically by April 30th of the tax year. This is NOT automatic and requires formal application.

Q: Are there additional tax credits for seniors or disabled persons? A: Yes, additional exemptions may be available for residents over 65, disabled persons, and disabled veterans. These require separate applications with supporting documentation submitted to the Dallam County Appraisal District by April 30th annually.

Q: How often is my property reassessed? A: Texas requires annual assessments, but the homestead cap limits increases to 10% per year for primary residences. Commercial properties and non-homestead residential properties can increase to full market value annually.

Q: What if I disagree with my property assessment? A: You can file a protest with the Dallam County Appraisal Review Board, typically by May 31st following the assessment notice. Informal and formal hearing options are available.

Q: What are the penalties for late property tax payments? A: Late payments incur penalties and interest charges that accrue monthly. Penalties start at 6% for the first month and can reach up to 48% annually, plus attorney fees for delinquent accounts.

Q: Can I pay my property taxes online? A: Yes, most Texas counties offer online payment options. Contact the Dallam County Tax Collector's office or visit their website for current online payment methods and any associated convenience fees.

Q: Why do property tax rates vary within Dallam County? A: Tax rates vary based on the combination of taxing entities serving your property, including different school districts, cities, and special districts like fire or hospital districts. Each entity sets its own rate, and your total rate is the sum of all applicable entities.

Verified Sources

Backed by 8 Official Government Sources

Every fact in this guide is sourced from official county, state, and federal documents.

01
County
2025 Tax Rate Calculation Worksheet - Dallam Countyco.dallam.tx.us
02
County
County Rates and Levies (XLSX)comptroller.texas.gov
03
Tax Doc
TEXAS SALES AND USE TAX RATES – January 2026comptroller.texas.gov
04
Tax Doc
96-1717 Handbook of Texas Property Tax Rulescomptroller.texas.gov
05
County
Dallam County Appraisal District Board of Directors Manualcomptroller.texas.gov
06
County
Dallam County Appraisal Districtcomptroller.texas.gov
07
Texas Constitution and Statutesstatutes.legis.state.tx.us
08
FR-2003-12-19.xmlgpo.gov
All sources verified as of 2025 Tax Year

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