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Updated 2025 Tax Year

Summit County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Approximately 7.15% effective rate (varies by special taxing districts and location within county)
1st Due
Dec 1
Exemptions
4+ Available
Section 1

How Property Tax Works

Summit County's property tax system is the primary funding mechanism for essential local services including public schools, county government operations, fire protection, library services, and various special districts. Property taxes in Summit County are assessed annually based on market value, with bills typically mailed in late October and due by December 1st of each year.

The effective property tax rate in Summit County for 2025 is approximately 7.15%, though this represents the total rate before any applicable tax credits. It's important to note that actual tax rates vary significantly by location within the county due to different combinations of special taxing districts such as school districts, fire districts, water districts, and municipal improvement districts. Properties within Park City, for example, may have different district combinations than properties in unincorporated areas of the county, resulting in varying total tax rates even for properties of similar value.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
County General Fund~1.2%Basic county services, administration, public safety
Park City School District~3.8%K-12 education funding (varies by school district)
Fire Protection District~0.4%Local fire and emergency services
Library District~0.2%Summit County Library system
Special Service Districts~0.5-1.5%Water, sewer, parks, recreation (varies by location)
Municipal Services~0.3-0.8%City services (if within municipal boundaries)
Total Estimated Rate~7.15%Combined rate for FY 2025-2026

Note: These rates are estimates for the 2025 levy year and vary by specific location within Summit County. Properties in different areas may be subject to different combinations of special districts, resulting in total rates that can range from approximately 6% to 8% depending on location and applicable district services.

Section 3

When Are Property Taxes Due?

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

First Installment
Dec 1
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 property taxes in Summit County are triggered by changes in property ownership, completion of new construction, or significant property improvements that occur 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 the supplemental tax.

For example, if you purchase a home in Summit County in March 2025 that was previously assessed at $400,000 but sells for $650,000, a supplemental assessment would be conducted. The supplemental tax would be calculated on the difference ($250,000) prorated for the remaining months of the tax year (10 months), resulting in an additional tax bill of approximately $1,488 (($250,000 × 7.15%) × 10/12 months). This supplemental tax bill would be issued separately from the annual property tax bill and would have its own due date, typically 30 days from the issue date.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Primary Residence Credit (45% reduction): -$135,000
  • Net Taxable Value: $165,000
  • Annual Tax ($165,000 × 7.15%): $11,798
  • Monthly Escrow: $983

Example 2: $600,000 Home

  • Market Value: $600,000
  • Primary Residence Credit (45% reduction): -$270,000
  • Net Taxable Value: $330,000
  • Annual Tax ($330,000 × 7.15%): $23,595
  • Monthly Escrow: $1,966

Example 3: $1,000,000 Home (Secondary Residence)

  • Market Value: $1,000,000
  • No Credits Applied: $0
  • Net Taxable Value: $1,000,000
  • Annual Tax ($1,000,000 × 7.15%): $71,500
  • Monthly Escrow: $5,958

Note: The Primary Residence Credit requires annual application by December 1st and reduces the taxable assessed value to 55% of market value for qualifying primary residences. Secondary homes and investment properties are taxed on 100% of market value.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Summit County require borrowers to maintain an escrow account for property tax payments, particularly given the high property values and substantial tax bills common in the area. Lenders typically collect 1/12th of the estimated annual property tax with each monthly mortgage payment, holding these funds in a separate escrow account until taxes become due in December.

The escrow payment process works as follows: your lender receives the property tax bill from Summit County in late October, reviews it for accuracy, and pays the full amount by the December 1st due date using accumulated escrow funds. Lenders are required to conduct an annual escrow analysis, usually performed after tax payments are made, to ensure adequate funds are being collected. If property values have increased significantly (common in Summit County), your monthly escrow payment may be adjusted upward to account for higher tax bills. Property owners should verify that their lender has the correct parcel number and mailing address with the Summit County Treasurer's office to ensure bills are properly delivered and paid on time.

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 Summit County for the 2025 tax year? A: Property taxes for the 2025 levy year are due by December 1, 2025. A 1% penalty is applied to unpaid balances starting December 2, 2025.

Q: What is the Primary Residence Tax Credit and how do I apply? A: The Primary Residence Tax Credit reduces your taxable assessed value to 55% of market value (a 45% reduction) for your primary residence and up to one acre of land. This credit is NOT automatic and requires annual application by December 1st. Applications must be filed with the Summit County Assessor's office.

Q: Are there other tax credits available in Summit County? A: Yes, Summit County offers various tax credits including veteran's exemptions, disabled person credits, and senior citizen credits. All credits require separate applications and proof of eligibility. Contact the Summit County Assessor's office for specific application requirements and deadlines.

Q: How does the homestead credit work for assessment increases? A: Utah does not have a traditional homestead credit that caps assessment increases. However, the Primary Residence Tax Credit provides ongoing relief by maintaining the 55% assessed value ratio as long as you continue to qualify and apply annually.

Q: When are properties assessed and how can I appeal? A: Properties are assessed annually as of January 1st. Assessment notices are typically mailed in August. Property owners have 45 days from the notice date to appeal their assessment with the Summit County Board of Equalization.

Q: What are the penalties for late property tax payments? A: A 1% penalty is applied immediately on December 2nd for unpaid taxes. Additional penalties and interest continue to accrue monthly, and properties can eventually be subject to tax lien sales if taxes remain unpaid.

Q: Can I pay my property taxes online? A: Yes, Summit County offers online payment options through their official website. Payments can be made by electronic check or credit card, though credit card payments may incur processing fees.

Q: Why do property tax rates vary within Summit County? A: Tax rates vary based on which special taxing districts serve your property. Properties in Park City have different district combinations than those in Coalville or unincorporated areas, resulting in different total tax rates ranging from approximately 6% to 8%.

Q: What triggers a supplemental tax assessment? A: Supplemental assessments occur when property changes ownership, new construction is completed, or significant improvements are made after the January 1st assessment date. The supplemental tax is prorated based on when the change occurred during the tax year.

Q: How do special districts affect my tax bill? A: Special districts provide specific services like fire protection, water, sewer, parks, and recreation. Each district adds its own tax rate to your total bill. The specific districts that serve your property depend on your location within Summit County and determine your total tax rate.

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