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Updated 2025 Tax Year

Castro County
Property Tax Guide

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

10 Official Sources
8 min read
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Quick Facts
Tax Rate
Typically $2.50-$3.00 per $100 assessed value, varies by taxing districts (county, school, hospital, special districts)
1st Due
Jan 31
Exemptions
5+ Available
Section 1

How Property Tax Works

Castro County, Texas operates under the state's property tax system, where property taxes serve as the primary funding source for local government services, schools, hospitals, and special districts. The county's effective tax rate typically ranges from approximately $2.50 to $3.00 per $100 of assessed value, though this varies significantly based on your specific location within the county due to different combinations of taxing entities.

Property taxes in Castro County fund essential services including the county government operations, Dimmitt Independent School District, Castro County Hospital District, and various special districts such as water districts and emergency services districts. Your actual tax rate depends on which taxing jurisdictions serve your property location. The Texas Property Tax Code governs assessment practices, including the important 10% annual assessment cap for homestead properties and various exemption programs that require separate applications.

Section 2

What Makes Up Your Tax Bill

ComponentRate (per $100)Description
Castro County$0.5094County government services, roads, law enforcement
School District~$1.20-$1.40Local independent school district (varies by district)
Hospital District~$0.30-$0.50Castro County Hospital District operations
Emergency Services~$0.10-$0.20Emergency medical services, fire protection
Water/Utility Districts~$0.05-$0.15Special utility districts (location-dependent)
Total Estimated$2.20-$2.80Combined rate varies by location

Rates shown are for FY 2025 levy year. The Castro County voter-approval rate is $0.5240 per $100. Actual total rates vary significantly based on your property's location within specific school districts, hospital districts, and special taxing districts. Contact the Castro County Appraisal District for your exact rate combination.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Castro 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 Castro County are triggered when there are changes in property ownership, new construction completion, or significant improvements that increase assessed value mid-year. These taxes are calculated based on the difference between the old and new assessed values, prorated for the remaining months in the tax year.

For example, if you complete a $100,000 home addition in March and your total tax rate is $2.60 per $100, the supplemental tax would be approximately $2,600 ($100,000 ÷ 100 × $2.60) prorated for 10 months (April through January), resulting in about $2,167 in supplemental taxes due within 30 days of the supplemental assessment notice.

Example Calculation

Example 1: $300,000 Home with Homestead

  • Market Value: $300,000
  • Homestead Exemption: $100,000 (school portion)
  • Net Taxable Value: $200,000 (for school), $300,000 (for other entities)
  • Annual Tax: ~$6,500
  • Monthly Escrow: ~$542

Example 2: $600,000 Home with Homestead

  • Market Value: $600,000
  • Homestead Exemption: $100,000 (school portion)
  • Net Taxable Value: $500,000 (for school), $600,000 (for other entities)
  • Annual Tax: ~$14,500
  • Monthly Escrow: ~$1,208

Example 3: $1,000,000 Home with Homestead

  • Market Value: $1,000,000
  • Homestead Exemption: $100,000 (school portion)
  • Net Taxable Value: $900,000 (for school), $1,000,000 (for other entities)
  • Annual Tax: ~$25,000
  • Monthly Escrow: ~$2,083

Note: Homestead exemption requires application and only applies to your primary residence. Additional exemptions for seniors, veterans, and disabled persons require separate applications with specific deadlines.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Castro County require property tax escrow accounts, collecting monthly payments equal to 1/12th of your annual tax bill plus a small cushion. Lenders typically pay your taxes directly to Castro County before the January 31 deadline to avoid penalties and protect their lien interest.

You should receive an annual escrow analysis from your lender showing tax payments made and any account adjustments needed. If your property taxes increase due to rising assessments or rate changes, your monthly escrow payment will be adjusted accordingly. Property owners without mortgages are responsible for making direct payments to Castro County by January 31st each year to avoid penalty and interest charges.

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 Castro County property taxes due for FY 2025? A: Property taxes are due January 31, 2025, in a single annual payment. There is no split payment option in Castro County.

Q: What homestead exemption is available and how do I apply? A: The homestead exemption provides $100,000 off your home's value for school district taxes only, and caps annual assessment increases at 10%. You must apply with the Castro County Appraisal District by April 30th following the year you establish homestead.

Q: Are there other tax exemptions available? A: Yes, additional exemptions include senior citizen (65+), veteran, and disability exemptions. Each requires a separate application with the Castro County Appraisal District by April 30th, along with supporting documentation.

Q: When are property values assessed? A: The Castro County Appraisal District assesses all properties annually as of January 1st, with notices typically mailed in April-May. You have until May 31st to file a protest if you disagree with your assessment.

Q: What are the penalties for late payment? A: Taxes paid after January 31st incur penalties of 6% in February, 7% in March, 8% in April, 9% in May, 10% in June, and 12% beginning July 1st, plus 1% interest per month.

Q: Can I pay my taxes online? A: Yes, Castro County typically offers online payment options through their official website. Contact the Castro County Tax Assessor-Collector's office for current online payment procedures and any associated convenience fees.

Q: How do special districts affect my tax bill? A: Your location determines which special districts (hospital, emergency services, water, etc.) apply to your property. Each district adds to your total tax rate. The same property in different locations within Castro County can have significantly different total tax rates.

Q: What if I disagree with my property assessment? A: You can file a protest with the Castro County Appraisal Review Board by May 31st (or within 30 days of receiving your notice, whichever is later). The protest process is free and can be done online, by mail, or in person.

Verified Sources

Backed by 10 Official Government Sources

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

01
County
Notice of 2025 Tax Rates - Castro County, Texasco.castro.tx.us
02
County
FY 25-26 Approved Budget - Castro County, Texasco.castro.tx.us
03
County
Notice of Public Hearing on Tax Rate - Castro County, Texasco.castro.tx.us
04
Tax Doc
96-1717 Handbook of Texas Property Tax Rulescomptroller.texas.gov
05
Tax Doc
Property Tax Today - Texas Comptrollercomptroller.texas.gov
06
Tax Doc
Property Tax Today - Texas Comptrollercomptroller.texas.gov
07
County
Castro County Appraisal Districtcomptroller.texas.gov
08
County
aviso de elección de bonos - Castro County, Texasco.castro.tx.us
09
County
CASTRO COUNTY, TEXASco.castro.tx.us
10
County
CASTRO COUNTY APPRAISAL DISTRICT PLAN FOR ...comptroller.texas.gov
All sources verified as of 2025 Tax Year

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