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Updated 2025 Tax Year

McMullen County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Varies by district - County base rate plus McMullen County ISD and applicable special districts
1st Due
Jan 31
Exemptions
5+ Available
Section 1

How Property Tax Works

McMullen County, Texas operates under the state's property tax system, which serves as the primary funding mechanism for local government services, schools, and infrastructure. Property taxes in McMullen County fund essential services including public education through McMullen County ISD, county operations, emergency services, and various special districts. The county follows Texas Property Tax Code requirements, with taxes based on the assessed value of real and personal property as of January 1st each year.

Property tax rates in McMullen County vary by location within the county due to overlapping taxing jurisdictions. While the county sets its base rate, property owners may also pay taxes to the school district, special utility districts, hospital districts, or other local entities depending on their property's location. The combined effective tax rate typically ranges from approximately 1.2% to 1.8% of assessed value, though this varies significantly based on the specific taxing districts serving each property. All taxing entities operate on different fiscal years, so rate adoptions and payment schedules may differ between jurisdictions.

Section 2

What Makes Up Your Tax Bill

ComponentRate (per $100)Fiscal YearDescription
McMullen County ISD$0.6002FY 2025-2026School district operations and debt service
McMullen County~$0.40-0.60FY 2025County government services and infrastructure
Emergency Services DistrictVariesFY 2025Fire protection and emergency medical services
Hospital DistrictVariesFY 2025Local healthcare services (if applicable)
Water/Utility DistrictsVariesFY 2025Water, sewer, and utility infrastructure

Total Combined Rate Range: $1.20-1.80 per $100 of assessed value

Note: Actual rates vary significantly by property location within McMullen County. Special districts may not apply to all properties. Contact the McMullen County Appraisal District for your specific tax rate combination.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in McMullen 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 tax bills in McMullen County are issued when property ownership changes, new construction is completed, or when property improvements are added after the January 1st assessment date. These supplemental assessments ensure that property taxes reflect current ownership and property conditions throughout the tax year.

When a supplemental tax is triggered, the McMullen County Appraisal District calculates the additional tax owed based on the change in assessed value, prorated for the remaining months in the tax year. For example, if a property sells in June with a higher assessed value than the previous assessment, or if new construction is completed mid-year, the new owner receives a supplemental bill covering the tax difference from the effective date through the end of the tax year. The calculation uses the same tax rates as the original assessment but applies only to the increased value and remaining time period.

Example Calculation

Example 1: $300,000 Property Value

  • Assessed Value: $300,000
  • Homestead Exemption Applied: -$100,000 (school district portion)
  • Net Taxable Value: ~$290,000 (varies by district)
  • Tax Rate: ~1.50% effective rate
  • Annual Tax: ~$4,350
  • Monthly Escrow: ~$363

Example 2: $600,000 Property Value

  • Assessed Value: $600,000
  • Homestead Exemption Applied: -$100,000 (school district portion)
  • Net Taxable Value: ~$590,000
  • Tax Rate: ~1.50% effective rate
  • Annual Tax: ~$8,850
  • Monthly Escrow: ~$738

Example 3: $1,000,000 Property Value

  • Assessed Value: $1,000,000
  • Homestead Exemption Applied: -$100,000 (school district portion)
  • Net Taxable Value: ~$990,000
  • Tax Rate: ~1.50% effective rate
  • Annual Tax: ~$14,850
  • Monthly Escrow: ~$1,238

Note: All exemptions require application and approval. Rates vary by specific taxing districts. These examples assume qualification for homestead exemption on primary residence.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in McMullen County require property tax escrow accounts to ensure timely payment of property taxes. Lenders collect monthly escrow payments along with principal and interest, typically calculating 1/12 of the annual tax bill plus a cushion amount. The lender pays property taxes directly to the appropriate taxing entities when due, usually by the January 31st deadline for most jurisdictions.

Property owners should verify that their lender has current tax information, especially after assessments change or exemptions are approved. The McMullen County Tax Assessor-Collector provides verification statements and tax certificates that lenders can use to confirm accurate escrow calculations. If your property taxes increase due to rising assessments or new special district taxes, your lender will adjust escrow payments accordingly, typically providing 60 days notice of payment changes. Property owners remain ultimately responsible for ensuring taxes are paid even when using escrow services.

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 McMullen County? A: For FY 2025, property taxes are typically due January 31, 2025, though some special districts may have different due dates. Contact the McMullen County Tax Office for specific deadlines affecting your property.

Q: What homestead exemption is available and how do I apply? A: McMullen County offers the state-mandated $100,000 homestead exemption for school district taxes on your primary residence. This exemption requires application with the McMullen County Appraisal District by April 30th. The exemption also provides a 10% annual cap on assessment increases.

Q: Are there other tax credits available? A: Yes, including senior citizen exemptions (age 65+), disability exemptions, and veteran exemptions. All require separate applications with supporting documentation filed by April 30th. Contact the appraisal district for specific eligibility requirements and forms.

Q: How does the 10% assessment cap work? A: The homestead cap limits annual increases in your property's assessed value to 10%, regardless of market value increases. This benefit requires filing for homestead exemption and only applies to your primary residence.

Q: When can I appeal my property assessment? A: Property owners can protest assessments through the McMullen County Appraisal Review Board. Protest deadlines are typically May 15th or 30 days after receiving your notice of appraised value, whichever is later.

Q: What are the penalties for late payment? A: Late payments incur penalty and interest charges starting February 1st. Penalties begin at 6% for February, increasing monthly, plus annual interest rates set by state law.

Q: Can I pay property taxes online? A: Contact the McMullen County Tax Assessor-Collector's office for current online payment options and accepted payment methods.

Q: Why did my tax bill increase if I didn't change anything? A: Tax increases can result from rising property values, new or increased special district taxes, school district rate changes, or loss of previous exemptions. The homestead cap helps limit increases for qualifying primary residences.

Q: What special districts might affect my property taxes? A: Depending on location, you may pay taxes to emergency services districts, hospital districts, water districts, or other special purpose districts. These vary significantly by area within McMullen County.

Q: How do I verify what taxing districts apply to my property? A: Contact the McMullen County Appraisal District with your property address or account number to receive a complete breakdown of all taxing entities and their current rates for your specific location.

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