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Updated 2025 Tax Year

Mason County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
$0.6427 per $100 assessed value (county base rate), varies by district combination
1st Due
Jan 31
Exemptions
5+ Available
Section 1

How Property Tax Works

Mason County, Texas operates under the state's property tax system to fund essential local services including schools, county operations, emergency services, and infrastructure maintenance. Property taxes are the primary revenue source for these services, with assessments based on the appraised market value of real estate and personal property as of January 1st each year.

The effective property tax rate in Mason County varies by location within the county due to different combinations of taxing entities. For the 2025 tax year, the county adopted a base rate of $0.6427 per $100 of assessed value, representing a 6.53% increase from the previous year. However, your total tax rate will depend on which school district, municipal, and special taxing districts serve your specific property location. Property owners should expect total effective rates that may be higher when all applicable taxing entities are combined.

Property values in Texas are reassessed annually, but homestead properties benefit from a 10% annual assessment increase cap under state law. This cap helps provide predictability for primary residence owners, though it requires proper homestead exemption filing to take effect.

Section 2

What Makes Up Your Tax Bill

ComponentRate (per $100)Description
Mason County$0.6427Base county services, adopted for FY 2025
School District M&OVariesMaintenance & Operations (varies by district)
School District I&SVariesInterest & Sinking fund for debt service
MunicipalVariesCity services (if applicable)
Special DistrictsVariesHospital, water, fire, other special purposes

Note: These rates apply to the 2025 levy year (taxes due in 2025 on 2025 assessments). Your actual total tax rate depends on your property's location within Mason County and which combination of taxing entities serve your area. School district rates vary significantly between districts, and not all properties are subject to municipal taxes. Special district taxes apply only to properties within those district boundaries.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Mason 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 Mason County are triggered when property changes ownership or when new construction is completed and added to the tax roll mid-year. The county reported $176,248 in property tax revenue from new property additions for the current fiscal year, indicating active development and property transfers.

When a supplemental assessment occurs, the additional tax is calculated on a pro-rated basis from the date the change becomes effective through the end of the fiscal year (August 31st in Texas). For example, if you purchase a home in March that was previously under-assessed, or if you complete a home addition in June, you'll receive a supplemental tax bill covering the increased assessed value for the remaining months of the tax year.

Supplemental taxes are billed separately from your annual tax bill and have their own due dates. Property owners typically receive supplemental bills within 30-60 days of the triggering event, with payment due within 30 days of the bill date to avoid penalties.

Example Calculation

Example 1: $300,000 Home with Homestead Exemption

  • Market Value: $300,000
  • School Homestead Exemption: -$100,000
  • Net Taxable Value: $200,000
  • Estimated Total Rate: $2.20 per $100
  • Annual Tax: $4,400
  • Monthly (if escrowed): $367

Example 2: $600,000 Home with Homestead Exemption

  • Market Value: $600,000
  • School Homestead Exemption: -$100,000
  • Net Taxable Value: $500,000
  • Estimated Total Rate: $2.20 per $100
  • Annual Tax: $11,000
  • Monthly (if escrowed): $917

Example 3: $1,000,000 Commercial Property

  • Market Value: $1,000,000
  • Available Exemptions: $0 (commercial)
  • Net Taxable Value: $1,000,000
  • Estimated Total Rate: $2.20 per $100
  • Annual Tax: $22,000
  • Monthly (if escrowed): $1,833

Important: The $100,000 school homestead exemption requires application and applies only to your primary residence. Rates shown are estimates; actual rates vary by taxing district combination. All exemptions must be applied for annually by April 30th.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Mason County require property tax escrow accounts for loans with less than 20% down payment. Your lender collects monthly tax payments along with your mortgage payment, depositing them into an escrow account. The lender then pays your property taxes directly to Mason County when they become due.

Texas property taxes are due by September 1st each year, with a final payment deadline of December 31st without penalty. Lenders typically pay taxes in early fall to avoid any late fees. Your lender must provide an annual escrow analysis showing the account balance, payments made, and any adjustments needed for the coming year.

If you pay taxes directly (without escrow), you can make payments to the Mason County Tax Assessor-Collector. Property owners should verify their tax bills carefully and ensure payments are made by December 31st to avoid penalties and interest charges that begin accruing on February 1st 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 Mason County property taxes due for 2025? A: Property taxes are due September 1, 2025, with a final payment deadline of December 31, 2025, without penalty. Late payments incur penalties starting February 1, 2026.

Q: What homestead exemption is available and how do I apply? A: The primary homestead exemption is $100,000 off assessed value for school district taxes on your primary residence. You must apply by April 30th following the year you establish homestead. The exemption also caps annual assessment increases at 10%.

Q: Are there other tax exemptions available? A: Yes, including exemptions for disabled veterans and surviving spouses, seniors over 65, and disabled persons. Each requires separate application with supporting documentation. Contact the Mason County Appraisal District for specific requirements and deadlines.

Q: How can I appeal my property assessment? A: You can protest your appraisal with the Mason County Appraisal Review Board by May 15th (or within 30 days of receiving your notice). File Form 50-132 with supporting evidence of your property's market value.

Q: What happens if I pay my taxes late? A: Penalties begin at 7% in February, increasing to 8% in March, 9% in April, and 10% in May. Interest accrues at 1% per month. Properties become subject to tax lien foreclosure after becoming delinquent.

Q: Can I pay my property taxes online? A: Contact the Mason County Tax Assessor-Collector's office to confirm available online payment options and accepted payment methods for current tax years.

Q: Why did my taxes increase if my exemptions didn't change? A: Tax increases can result from higher appraisals (up to 10% annually on homesteads), increased tax rates adopted by local taxing entities, or new special district assessments in your area.

Q: Do I need to reapply for my homestead exemption each year? A: No, once approved, the homestead exemption continues automatically as long as you own and occupy the property as your primary residence. You must reapply only if you move or change the property's use.

Q: How are taxes calculated on new construction? A: New construction is assessed when substantially complete, typically at 50% completion for residential properties. You'll receive a supplemental tax bill for the partial year, pro-rated from the completion date through August 31st.

Q: What special districts might affect my property taxes? A: Mason County properties may be subject to additional taxes from hospital districts, emergency services districts, water districts, or other special purpose districts. Your tax bill will itemize all applicable district taxes based on your property's location.

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