How are property tax rates determined in Missouri?

Property tax rates in Missouri are set by each taxing district (municipality, school district, park district, library, etc.) based on their annual levy (the amount of tax revenue they need). The rate is calculated by dividing the levy by the total assessed value of all property in the district.

What is the composite tax rate?

The composite tax rate is the sum of all overlapping taxing district rates that apply to a specific property. A typical property may be taxed by several overlapping districts. The composite rate determines your total tax bill when multiplied by your property's assessed value.

Why do tax rates vary within the same town?

Properties within the same municipality can have different composite rates because overlapping districts (school, park, fire, library) have different boundaries. A home in one school district may have a different rate than a home two blocks away in a different school district.

Lake St. Louis, MO Property Tax Rate 2026 — Full Breakdown by District

Showing latest tax year with year-over-year changes. Full rate history available with a paid plan. View plans →

Property Tax — Tax Year 2025 (payable 2026)i

MO DOR

Composite Ratei

6.5460%-3.1%YoY

Municipal Portioni

0.3910%-4.2%YoY6% of total

Effective Ratei

1.24%

Est. Annual Taxi

$5K$421/mo

Median Home Valuei

$405,900

Rate Trend — click a year to explorei

20242025

Municipal

Other Districts

Where Your Tax Dollar Goesi

$0.49 Wentzville R-IV School District - Operating Funds-Schools

$0.14 Wentzville R-IV School District - Debt Service

$0.13 Lake St. Louis FPD - General Revenue

$0.06 City of Lake St. Louis - General Revenue

$0.03 Wentzville R-IV School District - Operating Funds-Temp

$0.03 Lake St. Louis FPD - Debt Service

$0.03 Wentzville R-IV School District - Operating Funds-Temp 1

$0.03 St. Charles County - Road & Bridge

$0.02 St. Charles County Community College - General Revenue

$0.02 St. Charles County - Developmental Dis. Board

$0.01 East Central College - Debt Service

$0.01 St. Charles County - Dispatch

$0.00 St. Charles County Community College - Debt Service

$0.00 Lake St. Louis FPD - Pension

$0.00 St. Charles County - Johnson Grass

$0.00 St. Charles County - General Revenue

Estimated Tax by Home Valuei

$200K

$2,487

$207/mo

$300K

$3,731

$311/mo

$400K

$4,975

$415/mo

$500K

$6,219

$518/mo

$600K

$7,462

$622/mo

$700K

$8,706

$726/mo

$800K

$9,950

$829/mo

Highlighted value is closest to median home value ($406K)

16 Overlapping Taxing Districtsi

Wentzville R-IV School District - Operating Funds-Schools

49%3.2072%

Wentzville R-IV School District - Debt Service

14.2%0.9304%

Lake St. Louis FPD - General Revenuei

13%0.8499%

City of Lake St. Louis - General Revenuei

6%0.3910%

Wentzville R-IV School District - Operating Funds-Temp

3.3%0.2132%

Lake St. Louis FPD - Debt Servicei

3.1%0.2000%

Wentzville R-IV School District - Operating Funds-Temp 1

2.8%0.1851%

St. Charles County - Road & Bridgei

2.6%0.1687%

St. Charles County Community College - General Revenue

2%0.1323%

St. Charles County - Developmental Dis. Boardi

1.6%0.1068%

East Central College - Debt Service

1.3%0.0839%

St. Charles County - Dispatchi

0.5%0.0324%

St. Charles County Community College - Debt Service

0.4%0.0246%

Lake St. Louis FPD - Pensioni

0.3%0.0205%

St. Charles County - Johnson Grassi

0%0.0000%

St. Charles County - General Revenuei

0%0.0000%