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Updated 2025 Tax Year

Carbon County
Property Tax Guide

Everything you need to know about property taxes in Carbon County, WY. 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
1.3% effective rate (varies by special taxing districts including school, fire, library, and cemetery districts)
Exemptions
4+ Available
Section 1

How Property Tax Works

Carbon County, Wyoming operates on an annual property tax system that funds essential local services including schools, county government operations, fire protection, and infrastructure maintenance. The county's effective tax rate for 2025 is approximately 1.3%, which is slightly above Wyoming's statewide average of around 1%. Property taxes are assessed based on fair market value as determined by the Carbon County Assessor's Office, with assessments conducted annually.

Actual tax rates vary significantly by location within Carbon County due to special taxing districts such as school districts, fire districts, library districts, and cemetery districts. Properties in incorporated areas like Rawlins, Saratoga, and Encampment may have additional municipal taxes, while rural properties are subject to different combinations of special district assessments. The Carbon County Treasurer's Office collects all property taxes and distributes them to the appropriate local entities based on the specific taxing districts where each property is located.

Section 2

What Makes Up Your Tax Bill

ComponentRate (Mills)Description
County General Fund4.2Basic county operations and services
School District6.8-8.5Varies by school district (varies significantly)
Fire District1.0-2.5Emergency services (varies by district)
Library District0.5-1.0Public library services (where applicable)
Cemetery District0.2-0.8Cemetery maintenance (where applicable)
Municipal2.0-4.0City/town services (incorporated areas only)
Total Effective Rate13.0 millsEquivalent to 1.3% (varies by location)

Rates shown are for Levy Year 2025 and represent typical ranges. Actual rates vary significantly based on the specific combination of taxing districts applicable to each property location within Carbon County. Contact the Carbon County Assessor's Office at (307) 328-2651 for precise rates applicable to your specific property.

Section 3

When Are Property Taxes Due?

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

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 Carbon County are triggered when property ownership changes or when new construction/improvements are completed after the annual assessment date (typically January 1st). When these events occur, the County Assessor determines the difference between the previous assessed value and the new assessed value, then applies the current tax rate to calculate additional taxes owed for the remainder of the tax year.

For example, if you purchase a home in March that was previously assessed at $200,000 but now has a market value of $350,000, supplemental taxes would be calculated on the $150,000 difference. Using a 1.3% tax rate, this would result in approximately $1,950 in additional taxes prorated from March through the end of the tax year (about $1,463 for the remaining 9 months). Supplemental tax bills are mailed separately and typically have a 30-day payment deadline from the bill date.

Example Calculation

Example 1: $300,000 Home

  • Assessed Value: $300,000
  • Senior Citizen Tax Credit (if applicable): -$1,500
  • Net Taxable Value: $298,500
  • Annual Tax (1.3% rate): $3,881
  • Monthly Payment: $323

Example 2: $600,000 Home

  • Assessed Value: $600,000
  • Homestead Assessment Cap Benefit: -$2,000 (estimated)
  • Net Taxable Value: $598,000
  • Annual Tax (1.3% rate): $7,774
  • Monthly Payment: $648

Example 3: $1,000,000 Home

  • Assessed Value: $1,000,000
  • No credits applied: $0
  • Net Taxable Value: $1,000,000
  • Annual Tax (1.3% rate): $13,000
  • Monthly Payment: $1,083

Note: Tax credits shown require annual application to the Carbon County Assessor's Office and are not automatically applied. Actual rates may vary based on specific taxing districts.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Carbon County require borrowers to maintain an escrow account for property tax payments, particularly for loans with less than 20% down payment. Lenders collect monthly escrow payments equal to approximately 1/12 of your annual property tax bill plus a small cushion. The lender then pays your property taxes directly to the Carbon County Treasurer when bills become due.

Property tax bills in Carbon County are mailed by September 1st each year, with the first half due by November 10th. Lenders typically receive and pay the first installment on time, but homeowners should verify that payments are made correctly. You can confirm tax payments have been received by checking the Carbon County Treasurer's online portal or calling (307) 328-2668. If you pay off your mortgage or refinance, you become responsible for making tax payments directly and should contact the Treasurer's Office to ensure you receive bills at your current address.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
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Section 6

Frequently Asked Questions

Q: When are Carbon County property taxes due for fiscal year 2025? A: Tax bills are mailed by September 1st. The first half payment is due November 10, 2025, and the second half is due May 10, 2026.

Q: What tax credits are available and do they require application? A: Wyoming offers a Senior Citizen Tax Credit for property owners 65+ who have paid residential property taxes for 25+ years in Wyoming. This credit REQUIRES ANNUAL APPLICATION to the County Assessor by the 4th Monday in May and is not automatic.

Q: How does the homestead assessment cap work? A: Unlike traditional exemptions, homestead benefits in Wyoming typically limit annual assessment increases rather than reducing market value. This requires filing and caps how much your assessed value can increase year-over-year, but does not reduce your home's assessed market value.

Q: How often are properties reassessed in Carbon County? A: Properties are assessed annually as of January 1st. The County Assessor reviews market data and may adjust assessments based on current market conditions.

Q: What are the penalties for late property tax payments? A: Late payments incur interest charges and penalties. Contact the Carbon County Treasurer at (307) 328-2668 for current penalty rates and payment options.

Q: Can I pay my property taxes online? A: Yes, Carbon County offers online payment options through the Treasurer's website. You can also pay in person, by mail, or by phone during business hours.

Q: How do special district taxes affect my bill? A: Your total tax rate depends on which fire district, school district, library district, and other special taxing districts serve your property location. Rural and municipal properties have different district combinations.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the Carbon County Board of Equalization by the deadline specified on your assessment notice, typically in late spring. Contact the Assessor's Office at (307) 328-2651 for appeal procedures and deadlines.

Verified Sources

Backed by 10 Official Government Sources

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

01
County
Tax Sale Information | Carbon County, WY - Official Websitecarboncountywy.gov
02
Tax Doc
Wyoming Sales, Use, and Lodging Tax Revenue Report: ...eadiv.state.wy.us
03
Dept. of Revenue - Commercial & Industrialwyo-prop-div.wyo.gov
04
County
Carbon County Unclaimed Property Returnpatreasury.gov
05
Tax Doc
Property Tax Calendarcarboncountywy.gov
06
Fee Schedule | Rawlins, WY - Official Websiterawlinswy.gov
07
County
Carbon County, WY - Official Website | Official Websitecarboncountywy.gov
08
Long Term Homeowners Exemptioncarboncountywy.gov
09
County
County Assessor | Carbon County, WY - Official Websitecarboncountywy.gov
10
State
Financial Statements and Supplemental Information For ...carboncountywy.gov
All sources verified as of 2025 Tax Year

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