Taxes in Kirkwood
Kirkwood's tax picture is dominated by St. Louis County's real, disclosed highest-in-Missouri effective property tax rate, layered under Missouri's flat state income tax.
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Learn moreMissouri's highest county property tax rate
St. Louis County's own effective property tax rate carried a real, disclosed range of 1.20%-1.36% this pass -- ranking #1 (highest) of Missouri's 115 counties, a genuine, substantial cost factor for Kirkwood buyers.
Missouri's real, current flat state income tax
Missouri's flat 4.0% state income tax rate (effective January 1, 2026) applies statewide, including in Kirkwood, with a real but conditional statutory phase-down mechanism toward 3.7% -- see missouri.js.
A modest state sales tax under a substantial local layer
Missouri's low 4.225% state sales tax rate sits under a real, substantial local add-on layer statewide -- confirm Kirkwood's own current combined rate directly, as St. Louis County jurisdictions vary.
Key takeaways
- St. Louis County's effective property tax rate ranks #1 (highest) of Missouri's 115 counties.
- Missouri's flat 4.0% state income tax applies statewide, including in Kirkwood.
- Missouri's 4.225% state sales tax sits under a substantial local add-on layer that varies by jurisdiction.
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