Kansas City Property Tax Calculator

Updated for 2025 local levies — eight Kansas City-area counties

Coverage spans Johnson, Leavenworth, Miami, and Wyandotte counties in Kansas, plus Cass, Clay, Jackson, and Platte counties in Missouri. Rates come from published 2025 county levy sheets and county assessor or clerk tax rate data, combined by tax district so the county, city, and school district portions are all included in one figure. Levies are set annually and can change in a future year; nothing here projects a rate beyond the 2025 levy year.

Why a new construction home's first tax bill is usually low

Assessment happens as of a set date each year, so a home that did not exist yet — or was not finished — is valued on what was actually there at that point, in many cases the vacant lot. The improvement is picked up later, which is why the first bill on a brand-new home can look far smaller than the steady-state number, and why the bill after that can jump.

In Missouri, that timing is set out in RSMo § 137.082. Under that section, newly constructed residential property that has never been occupied is not assessed as improved real property until occupancy, or the first day of January of the fourth year following the year construction was completed. In counties that have adopted the section, a newly constructed and occupied home is then assessed as of the first day of the month following occupancy, prorated across the remaining part of that year at that year's tax rates. Whether the occupancy-based provision applies depends on the county adopting it, so the practical result varies by county.

This is general information about how assessment timing works, not tax or legal advice for a specific parcel. Confirm your situation with the county assessor, your lender, title company, or a tax professional.

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