Missouri Property Tax Appeal Guide
How to challenge your property tax assessment in Missouri - deadlines, process, and a savings calculator.
What This Data Tells Us About Appeals in Missouri
- Expect $0 for Board; $25 for State Tax Commission when petitioning the County Board of Equalization - later tribunal or court stages may use a different schedule.
- This ACS extract does not store how often Missouri assessments are reduced on appeal; comparable sales and property-record errors are the evidence the named board typically asks for.
- The typical window centers on July; confirm the current county notice date before relying on the statewide summary. Compare Washington's July window before assuming Missouri is early or late.
Primary signal
The filing route can carry a fee
File with the County Board of Equalization / State Tax Commission. The reported filing-fee structure is $0 for Board; $25 for State Tax Commission; later court or tribunal stages may use a different schedule.
Decision signal 2
Missouri's process has its own procedural details
Missouri reassesses every odd year. The STC appeal is a de novo review, you can present new evidence.
Decision signal 3
This extract does not store an appeal-win rate
The ACS county medians on this site do not include how often Missouri assessments are reduced on appeal. Recent comparable sales and documented property-record errors are the evidence boards typically ask for.
Decision signal 4
The filing window centers on July
July 10 deadline for filing with the Board of Equalization (odd-numbered reassessment years). Deadlines can vary by county and assessment cycle, so confirm the current date with the local assessor before relying on this guide.
How to read this guide and disclaimer
Use the ranked signals above as a preparation order, not as a forecast. Start with the filing window and named appeal body because a strong valuation argument cannot cure a missed deadline or a filing sent to the wrong office. Then compare the assessment with recent, genuinely similar properties and document factual errors such as incorrect square footage, condition, or classification.
An estimated success rate is not part of this ACS extract. Keep copies of the assessment notice, evidence, forms, delivery confirmation, and every response from the taxing authority. If a state rule and a county instruction differ, follow the current instruction issued by the office that will hear the appeal.
This guide is for informational purposes only and is not legal or tax advice. Deadlines, filing fees, and procedures vary by county within Missouri and can change year to year. Always verify the current rules with your local assessor's office, or a licensed attorney or tax professional, before filing. Source: Missouri State Tax Commission.
Appeal calendars beside Missouri
Other state boards, not geography. Use them to see whether Missouri's July window is unusual; start with Washington and Arkansas.
| Peer state | Typical month | Filing fee |
|---|---|---|
| Washington Also open Washington appeal steps | July | $0 |
| Arkansas Also open Arkansas appeal steps | August | $0 |
| Colorado Also open Colorado appeal steps | June | $0 |
| Idaho Also open Idaho appeal steps | June | $0 |
| Illinois Also open Illinois appeal steps | August | $0 |
Appeal Deadline
July 10 deadline for filing with the Board of Equalization (odd-numbered reassessment years)
Appeal Body: County Board of Equalization / State Tax Commission
Step-by-Step Appeal Process
- 1
Review your assessment notice in even years (reassessment occurs every odd year, effective the following even year)
- 2
Contact the county assessor informally first
- 3
File an appeal with the County Board of Equalization by July 10
- 4
Attend the Board hearing
- 5
If denied, appeal to the State Tax Commission (STC) by September 30
Missouri-Specific Notes
Missouri reassesses every odd year. The STC appeal is a de novo review, you can present new evidence.
Source: Missouri State Tax Commission
Estimate appeal savings
After you have Missouri's deadline (July) and filing route (County Board of Equalization), project annual savings if an assessment cut sticks. The shared estimator lives on one tools URL so each state page keeps its own process facts instead of reprinting the same form.
Open appeal savings estimator →