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Updated 2025 Tax Year

San Patricio County
Property Tax Guide

Everything you need to know about property taxes in San Patricio 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
Varies by location, approximately 1.8% base plus additional districts (school, municipal, special districts)
1st Due
Jan 31
Exemptions
5+ Available
Section 1

How Property Tax Works

San Patricio County operates under Texas property tax law, which funds essential local services including schools, county operations, emergency services, and infrastructure maintenance. Property taxes are the primary revenue source for these services, with the state's average effective tax rate around 1.8%. In San Patricio County, property owners can expect effective tax rates that vary significantly based on their specific location within the county due to overlapping taxing jurisdictions.

The county's property tax system includes multiple components: county taxes, school district taxes, municipal taxes (if within city limits), and various special district assessments for services like hospital districts, water districts, or emergency services districts. Each taxing entity sets its own rate, meaning two properties of equal value in different parts of the county may have substantially different tax bills. Property owners should verify which specific taxing districts apply to their property, as rates can vary considerably between areas like Sinton, Mathis, Aransas Pass, or unincorporated areas of the county.

Section 2

What Makes Up Your Tax Bill

Based on the most recent data available for San Patricio County taxing entities:

ComponentRate (per $100 value)Description
County Base Rate$0.448694No-new-revenue rate for county operations
County Voter-Approval Rate$0.721410 - $0.737138Maximum rate range without voter approval
School DistrictVaries by ISDIncludes Sinton ISD, Mathis ISD, and others
MunicipalVaries by cityApplies only within incorporated city limits
Special DistrictsVariesHospital districts, water districts, emergency services

Note: These rates apply to the current tax levy year. The voter-approval rate represents the maximum rate the county can adopt without triggering a voter referendum. School district rates vary significantly - for example, Mathis ISD has different rates than other districts in the county. Property owners should contact the San Patricio County Appraisal District at (361) 364-6280 to determine the exact rate combination for their specific property location.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in San Patricio 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 San Patricio County occur when property undergoes changes that affect its assessed value during the tax year. The most common triggers include change of ownership, completion of new construction, or removal/addition of exemptions or special assessments. When these events occur, the county recalculates the tax obligation based on the new circumstances.

The supplemental tax calculation determines the difference between what was already assessed and what should be assessed under the new conditions, prorated for the remaining months in the tax year. For example, if a property sells in June and loses its homestead exemption, the new owner would receive a supplemental bill for the additional taxes owed from June through December. These supplemental assessments are typically issued within 60-90 days of the triggering event and have separate due dates from the regular annual tax bill.

Example Calculation

Example 1: $300,000 Property in Unincorporated Area

  • Assessed Value: $300,000
  • Homestead Exemption Applied: $100,000 (school district portion)
  • Net Taxable Value: $200,000 (for school); $300,000 (for county/other)
  • Combined Effective Rate: ~2.1% (estimated)
  • Annual Tax: ~$5,700
  • Monthly Equivalent: ~$475

Example 2: $600,000 Property with Homestead in City Limits

  • Assessed Value: $600,000
  • Homestead Exemption Applied: $100,000 (school district)
  • Net Taxable Value: $500,000 (school); $600,000 (county/city/special)
  • Combined Effective Rate: ~2.3% (estimated with municipal)
  • Annual Tax: ~$12,800
  • Monthly Equivalent: ~$1,067

Example 3: $1,000,000 Commercial Property

  • Assessed Value: $1,000,000
  • Credits Applied: None (commercial properties don't qualify for homestead)
  • Net Taxable Value: $1,000,000
  • Combined Effective Rate: ~2.2% (estimated)
  • Annual Tax: ~$22,000
  • Monthly Equivalent: ~$1,833

Note: All exemptions and credits require application and approval. Rates vary by specific location and taxing districts. These are estimates - contact San Patricio County Appraisal District for precise calculations.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in San Patricio County require property tax escrow accounts for loans with less than 20% down payment. The lender collects monthly tax payments along with principal and interest, depositing these funds into an escrow account. Since Texas property taxes are due January 31st annually, lenders typically pay the full year's taxes in January or February from the accumulated escrow funds.

Property owners should verify their lender pays taxes correctly and on time, as the property owner remains ultimately responsible for tax obligations even when using escrow. The San Patricio County Tax Office provides online verification tools to confirm payment status. When refinancing or paying off loans, ensure there's a clear transition plan for tax payments to avoid late penalties. Lenders must provide annual escrow statements showing collections, payments, and account balances, typically mailed by January 31st each 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 San Patricio County? A: Property taxes are due January 31st annually for the current tax year. There is no split payment option - the full year's taxes must be paid by this date to avoid penalties.

Q: What tax credits are available and how do I apply? A: The primary credit is the homestead exemption ($100,000 for school district taxes), which requires application to the San Patricio County Appraisal District. Additional exemptions may be available for seniors (65+), disabled persons, and veterans. All require separate applications with supporting documentation.

Q: How does the homestead exemption work? A: The homestead exemption provides two benefits: a $100,000 reduction in assessed value for school taxes, and caps annual assessment increases at 10% for all taxing entities. You must apply by April 30th of the first year you qualify, and it continues automatically while you own and occupy the home as your primary residence.

Q: When can I appeal my property assessment? A: Property owners can appeal assessments through the San Patricio County Appraisal Review Board. Protest deadlines are typically May 15th (or 30 days after notice of value, whichever is later). Contact the Appraisal District at (361) 364-6280 for current year deadlines and procedures.

Q: What are the penalties for late payment? A: Texas law imposes immediate penalties: 6% in February, 7% in March, 8% in April, 9% in May, 10% in June, and 12% July 1st and after, plus 1% interest monthly. Additional attorney and court costs may apply for delinquent accounts.

Q: Can I pay my property taxes online? A: Yes, San Patricio County offers online payment options through their official website. Contact the Tax Office at (361) 364-6233 for current online payment procedures and accepted payment methods.

Q: Why do properties in the same neighborhood have different tax rates? A: San Patricio County contains multiple overlapping taxing districts including different school districts (Sinton ISD, Mathis ISD, etc.), municipalities, hospital districts, and special utility districts. Your exact location determines which combination of taxing entities applies to your property.

Q: What happens if I buy property mid-year? A: Property taxes are prorated at closing based on the closing date. The seller pays taxes through the closing date, and the buyer is responsible from closing forward. However, the tax bill will still be sent to the owner of record on January 1st of the tax year.

Verified Sources

Backed by 10 Official Government Sources

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

01
Tax Doc
Notice About Tax Ratessanpatriciocountytx.gov
02
Tax Doc
2025 TAX RATESsanpatriciocountytx.gov
03
Tax Doc
Notice About 2025 Tax Ratesaptx.gov
04
Tax Doc
Property Tax Today - Texas Comptrollercomptroller.texas.gov
05
Tax Doc
Property Tax Today - Texas.govcomptroller.texas.gov
06
San Patricio Appraisal Districtcomptroller.texas.gov
07
2025 ISD Summary Worksheet - Texas Comptrollercomptroller.texas.gov
08
2024 ISD Summary Worksheet - Texas Comptrollercomptroller.texas.gov
09
Tax Doc
2024 TAX RATESsanpatriciocountytx.gov
10
Tax Doc
96-1717 Handbook of Texas Property Tax Rulescomptroller.texas.gov
All sources verified as of 2025 Tax Year

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