Missouri Property Tax Calculator (Assessed Value & Millage Rates)

Missouri homeowners pay an average effective property tax rate of 0.79%, which places the state at #23 of 50 (tied with Washington), just below the national median. Nationally, the average effective rate runs close to 1.0%, which puts Missouri below the national average of roughly 1.0%. That's also well below the Midwest regional average of about 1.35%.

For buyers and investors evaluating Missouri real estate, that rate is not just a sticker number: it funds the local school district, county services, and municipal budget that shape a property's long-run carrying cost and its resale economics.

Missouri counties handle the mechanics of periodic reappraisal and millage-setting locally, so the statewide average above is a useful benchmark but actual bills still hinge on the specific county, school district, and any exemptions or appeals the owner has filed in a given year.

Missouri assesses residential property at 19% of market value and then, under the Hancock Amendment, forces local taxing districts to roll their rates back when a general reassessment increases the tax base. Growth in value does not automatically become growth in revenue here.

None of that detail is asked for here. This calculator works one level up, applying Missouri's average effective property tax rate of 0.79% to the value you enter. That rate is the ratio of property taxes actually paid to home value across the state, so the assessment ratios, caps, and exemptions described above are already baked into it.

Working through it in order:

1. Start from appraised value. Counties reassess in odd-numbered years, and the 19% residential ratio produces assessed value.
2. Take off exemptions and credits. The Missouri property tax credit reimburses qualifying senior and disabled owners through the income tax rather than the county bill.
3. Multiply by the effective rate. At 0.79%, a $400,000 home in Missouri comes to $3,160 a year before any exemption you enter above.
4. Divide by twelve for escrow. That same home works out to $263.33 a month set aside in a mortgage escrow account.
5. Compare it against your own bill. The rollback applies to reassessment growth, not to new construction, so districts still capture revenue from development. Your county's number is the one that governs; this figure tells you whether it is roughly where a Missouri home of that value ought to land.

Using this calculator's baseline inputs: a $400,000 home in Missouri, taxed at the state's 0.79% average effective rate (rank #23 of 50 states).

1. Start with the assessed value. The home is assessed at its full $400,000.00 market value, with no homestead exemption applied in this baseline scenario.
2. Apply the effective rate. $400,000.00 × 0.79% = $3,160.00 in annual property tax, Missouri's statewide average effective rate.
3. Convert to a monthly escrow. Lenders typically collect property tax in twelve equal installments alongside principal and interest: $3,160.00 ÷ 12 = $263.33 per month.
4. Project a five-year hold. At a flat rate, five years of ownership totals $3,160.00 × 5 = $15,800.00, before any reassessment, exemption change, or millage increase.

At 0.79%, Missouri lands just below the middle nationally, ranking #23 of 50 states. That is a moderate but still material carrying cost for homeowners.

The engine multiplies taxable value by a single effective rate of 0.79%, so the twelve-row value sweep is a straight line with no threshold in it. The three questions it can answer are what the exemption is worth, what a change in value costs, and what value hits a target escrow figure.

Pricing the exemption. On the baseline $400,000 home the engine returns $3,160.00 a year with no exemption, or $263.33 a month. Apply the calculator's $25,000 homestead scenario and it returns $2,962.50 a year, or $246.88 a month. The exemption is therefore worth exactly $197.50 a year in Missouri, which is $25,000 multiplied by the 0.79% rate. That figure scales with the exemption and not with the home: a $25,000 exemption saves $197.50 on a $300,000 home and on a $3,000,000 home alike.

The marginal cost of the next unit. Each additional $10,000 of assessed value costs $79.00 a year. The engine returns $3,160.00 at $400,000 and $3,239.00 at $410,000. At $300,000 the annual bill is $2,370.00 and the monthly escrow $197.50; at $500,000 they are $3,950.00 and $329.17. There is no bracket anywhere in the sweep, so the cost per $10,000 is identical at the bottom and the top of the range.

The reverse question. Buyers usually work from an escrow ceiling rather than a tax figure. Holding the monthly Missouri escrow to $197.50 a month, or $3,600 a year, means an assessed value of $455,696.20, which the engine confirms exactly. Every further $100 a month of escrow tolerance corresponds to about $151,899 of additional assessed value.

Where the sweep table and the headline disagree. The twelve-row schedule steps assessed value from one sixth to two times the value entered, but it computes each row from the raw value, not from the value after the homestead exemption. Set the exemption to $25,000 and the headline drops to $2,962.50 while row 6 of the table, which sits at the entered $400,000, still reads $3,160.00. The gap is the $197.50 the exemption is worth, and it appears in every row of the table. The table is the correct answer to "what would this cost with no exemption at each value"; it is not a projection of the exempted bill.

A Missouri-specific caution about the exemption field. Missouri assesses residential property at 19% of market value and then applies locally set levies to that assessed figure, whereas this calculator applies a single statewide effective rate directly to full market value. The exemption input subtracts from market value rather than from the 19% assessed value, so the $197.50 above is a value-based illustration rather than a model of Missouri's assessment ratio or of the Missouri Property Tax Credit for seniors and disabled residents, neither of which appears in this code path.

What the single rate cannot express. 0.79% is a statewide average effective rate, and Missouri sets millage locally, so no individual parcel is taxed at exactly this figure. The engine holds one number per state, has no field for county or municipality, and applies no reassessment schedule of any kind. The rank of #23 of 50 is likewise a stored figure rather than something recomputed from the other 49 states inside this page.

• Specific hyper-local county and municipal millage district variations within Missouri.
• Community Improvement District (CID), Neighborhood Improvement District (NID), and Transportation Development District (TDD) assessments. Missouri municipalities, especially in the St. Louis and Kansas City areas, use these districts to levy additional property tax, sales tax, or special assessments on properties within a defined boundary to fund infrastructure and services beyond the base county and municipal millage.
• Commercial vs residential assessment classification differentials.
• Property tax appeal reductions or localized board of equalization adjustments.

• Confusing Market Fair Value with Assessed Basis: Some jurisdictions assess property at fractional ratios rather than 100% of market value.
• Failing to File Homestead Paperwork: Homestead exemptions are rarely automatic; homeowners must file timely paperwork with the county appraisal district.
• Underestimating Post-Sale Supplemental Assessments: Purchasing a newly constructed or reassessed property often triggers catch-up supplemental tax bills.
• Ignoring Property Tax Appeal Windows: Missing the annual 30-to-60 day statutory protest window forfeits the right to challenge over-assessed property values for that tax year.

• U.S. Census Bureau: American Community Survey (ACS) Real Estate Assessment Benchmark Data. census.gov/programs-surveys/acs

Also consulted: State Tax Commission of Missouri: Property Tax Assessment Guidance.