St. Charles County, MO property tax rate
St. Charles County · Missouri · #4 of 115 in the state
Median annual property tax $3,480 · median home value $320,800
$3,480 a year · $290 a month using the area benchmark. Enter a value such as 350,000 or 350,000.00.
A rough planning estimate, not a tax quote.
Above the U.S. benchmark 0.94% (1.16×), above the Missouri benchmark 0.85%.
Ranked among 115 Missouri counties with available benchmarks.
What this benchmark means
Median real estate taxes paid ÷ median owner-occupied home value, ACS 2020–2024 — a ratio of two medians, not a statutory rate, not the median of individual bills and not your property's rate. Exemptions people already claim are reflected in the survey; your bill depends on taxable value, local districts, exemptions and reassessment after a sale.
Census figures behind this page
| Median real estate taxes paid | $3,480 |
|---|---|
| With a mortgage / without | $3,522 / $3,382 |
| Median home value | $320,800 |
| Median household income | $104,692 · tax is 3.3% of it |
| Median gross rent | $1,370 / mo |
| Owner-occupied | 81% of 161,311 homes |
| Population | 414,535 |
When it's due in Missouri
All states| Annual payment | Due Dec 31 Late after Jan 1 under state law — the exact cutoff time, weekend/holiday carry-over and this year's date are on your bill. |
|---|---|
| Late penalty | 2% penalty for the first month, plus up to 2% per month thereafter (max 18%) plus 2% collector commission (Mo. Rev. Stat. § 140.100) |
| Appeal window | second Monday in July to county Board of Equalization (Mo. Rev. Stat. § 137.275, § 137.385); State Tax Commission appeal by Sept 30 |
Taxes due upon receipt of bill and delinquent after December 31. Regular annual schedule; tax year: calendar 2026, bills mailed Nov. Source: Mo. Rev. Stat. § 140.010, § 140.100, rules checked 2026-09-19. Confirm the amount and deadline on your official tax bill.
Missouri counties with a similar rate
All 115How this benchmark was computed
Median real estate taxes paid by owner-occupied households in St. Charles County ($3,480) divided by the median value of those homes ($320,800), both from the Census Bureau's American Community Survey 2020–2024 5-year estimates. It is a ratio of two medians — a reasonable area benchmark, not the assessor's mill rate and not any one household's rate. Newly purchased homes are often reassessed to sale price, so a buyer's first bill can run above it. Data & method