St. Charles County property tax appeals
Appeal Season is a property tax appeal co-pilot. We are expanding county by county to high-tax areas like St. Charles County. We are not there yet, so we cannot check a Missouri assessment today. Leave your email and we will tell you the day we cover St. Charles County, and nothing else.
Missouri assesses homes at 19 percent of market value and lets you appeal to the county board of equalization by the second Monday in July, then to the State Tax Commission by September 30. An appeal makes sense when comparable sales show your value is too high.
- Recent comparable sales show your market value is too high.
- Your home is valued higher than similar homes nearby.
- Your county just reassessed (odd year) and the value overshot the market.
- Your bill went up but your value is fair. Local levies set the rate, not the assessor.
- You missed the second Monday in July. The board cannot take a late appeal.
Read the full explanation
In Missouri, your county assessor sets your home's market value in odd numbered years and assesses residential property at 19 percent of that value. You appeal the value, not your tax bill, to the county board of equalization by the second Monday in July. If the board denies you, you can appeal to the State Tax Commission by September 30. An appeal helps when recent comparable sales show your value is too high. It usually will not help just because your bill went up, since local levies set the tax rate. This is general information, not tax advice.
Source: Missouri State Tax Commission · checked 2026-07-17. We're preparing coverage here and will publish St. Charles County's own verified schedule once our review of the county's records is complete.
- 2026 filing deadline:
- Monday, July 13, 2026
- Filing window:
- You appeal your value to the county board of equalization by the second Monday in July, which is July 13 in 2026. Residential property is assessed at 19 percent of market value, so a value cut lowers your assessment in that proportion. If the board denies you, you can appeal to the State Tax Commission by September 30. Filing is free.
- Where to file:
- St. Charles County Board of Equalization
- Filing fee:
- Filing an appeal is free.
- Phone:
- 636-949-7431
- County portal:
- www.sccmo.org/181/Appeal-Process
Verified against official sources, approved 2026-07-17.