HonestCasa logoHonestCasa
Updated 2025 Tax Year

Platte County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
0.4885% county base rate, total effective rates 1.5-2.5% (varies by district)
Exemptions
5+ Available
Section 1

How Property Tax Works

Platte County, Missouri operates under a property tax system that funds essential local services including schools, roads, public safety, and county operations. Property taxes are assessed based on the assessed value of real estate, which is typically a percentage of the property's fair market value as determined by the County Assessor. The county reassesses real property every two years to ensure current valuations.

The effective tax rate in Platte County varies significantly by location within the county due to multiple overlapping taxing jurisdictions, including school districts, fire protection districts, library districts, and municipal services. For 2025, the base county general revenue rate is 0.4885%, but total effective rates typically range from approximately 1.5% to 2.5% when all taxing districts are combined. Property owners should note that their specific tax rate depends on which special taxing districts serve their particular address, making each property's tax calculation unique to its location within Platte County.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
Platte County General Revenue0.4885%FY 2025 base county operations and services
City of Platte City (example)0.4572%FY 2025 municipal services (varies by city)
School DistrictsVariesTypically 3.0-4.5% depending on district
Fire Protection DistrictsVariesUsually 0.3-0.8% where applicable
Library DistrictsVariesTypically 0.1-0.3% where applicable
Road DistrictsVariesAdditional levy for road maintenance
Special AssessmentsVariesBonds, TIF districts, other special levies

Note: These rates apply to the FY 2025 levy year. Total effective rates vary by specific location within Platte County based on which combination of taxing districts serve each property. Property owners receive a detailed tax bill showing all applicable district rates for their specific address.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Platte 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 Platte County are additional property tax assessments that occur when there are changes to property ownership, valuation, or improvements outside of the regular assessment cycle. The most common triggers include new construction completion, major renovations that increase property value, ownership transfers that prompt reassessment, or corrections to previous assessments.

Supplemental taxes are calculated using the same tax rates that apply to regular property taxes, but they're prorated based on the number of months remaining in the tax year when the change occurred. For example, if a new home is completed and receives its certificate of occupancy in March, the supplemental tax would cover the remaining 10 months of that tax year (March through December). The calculation takes the increased assessed value multiplied by the applicable tax rate, then prorated for the partial year.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessed Value (19% of market): $57,000
  • Senior Tax Credit (if applicable): -$1,000
  • Net Taxable Value: $56,000
  • Total Tax Rate (example district): 2.1%
  • Annual Tax: $1,176
  • Monthly Escrow: $98

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessed Value (19% of market): $114,000
  • Homestead Tax Credit (if applicable): -$1,500
  • Net Taxable Value: $112,500
  • Total Tax Rate (example district): 2.3%
  • Annual Tax: $2,588
  • Monthly Escrow: $216

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Assessed Value (19% of market): $190,000
  • No Credits Applied: $0
  • Net Taxable Value: $190,000
  • Total Tax Rate (example district): 2.4%
  • Annual Tax: $4,560
  • Monthly Escrow: $380

Note: Tax credits require separate applications and are not automatically applied. Actual rates vary by specific taxing districts serving each property location.

See How Taxes Affect Your Payment

Property taxes are just part of your total monthly cost. Get the full picture.

Calculate Now
Section 5

Escrow & Property Taxes

Most mortgage lenders in Platte County require property tax escrow accounts for borrowers with less than 20% down payment. The lender collects 1/12 of the estimated annual property tax bill with each monthly mortgage payment, plus an initial escrow cushion at closing. Property taxes in Platte County are typically due in two installments: the first half due by December 31st and the second half due by June 30th of the following year.

Lenders usually pay property taxes directly to Platte County on behalf of homeowners when bills become due. Property owners should verify their tax bills match their lender's escrow analysis, as assessment changes or new special district levies can cause escrow shortages. The county mails tax bills to both the property owner and mortgage company when an escrow account exists. Homeowners can monitor their account online through the Platte County Collector's website and should review their annual escrow statement to ensure adequate funding for the upcoming tax 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 Platte County property taxes due for FY 2025? A: Personal property taxes are due by December 31st. Real estate taxes are typically split into two payments - first half due December 31st, second half due June 30th of the following year. The first half becomes delinquent May 1st if unpaid.

Q: What tax credits are available and how do I apply? A: Common credits include the Senior Citizen Tax Credit (age 65+), Disabled Person Tax Credit, and Homestead Preservation Credit. All credits require separate applications filed with the County Assessor's office and are NOT automatically applied to your tax bill.

Q: How does the Homestead Credit work? A: The Homestead Credit limits annual assessment increases on your primary residence, typically capping growth at 10% per year rather than allowing unlimited increases. You must file an application with the County Assessor to receive this protection - it's not automatic.

Q: When does Platte County reassess properties? A: Real property is reassessed every two years. Personal property is assessed annually as of January 1st. Assessment forms for personal and business property are considered late after March 1st.

Q: How do I appeal my property assessment? A: Appeals must be filed with the Platte County Board of Equalization during the specified appeal period, typically in June-July following reassessment. Contact the County Assessor's office for specific deadlines and required forms.

Q: What are the penalties for late payment? A: Delinquent taxes accrue interest and penalties. The first half becomes delinquent May 1st if unpaid from the December 31st due date, with additional penalties and interest applied monthly thereafter.

Q: Can I pay my property taxes online? A: Yes, Platte County offers online payment options through their official website. Check with the County Collector's office for accepted payment methods and any associated convenience fees.

Q: Why did my tax rate increase when I didn't vote for any tax increases? A: Your total rate includes multiple taxing districts (school, fire, library, etc.) that may pass separate ballot measures. Additionally, Tax Increment Financing (TIF) districts and special assessments can affect your rate even if you didn't vote on them directly.

Q: Do I qualify for a personal property tax waiver? A: You may qualify for a waiver if you don't own taxable personal property above the minimum threshold. Check the County Assessor's website to determine eligibility and file the appropriate waiver application.

Q: How do special taxing districts affect my bill? A: Your property location determines which fire district, school district, library district, and other special districts serve you. Each adds its own rate to your total tax bill, which is why rates vary significantly across different areas of Platte County.

See the Full Picture of Your Home Costs

Property taxes are just one piece of homeownership. HonestCasa helps you understand your total monthly cost and explore safe ways to access your home equity.

Total Monthly Cost

Mortgage + taxes + insurance + HOA

Equity Growth

Track how your equity grows over time

Safe Equity Access

Options for projects or debt payoff

Free • No credit check • 2-minute estimate