Cost of Living in Arnold

Arnold's cost of living runs close to Missouri's statewide norms on housing, with one real, notable exception: a combined sales tax rate substantially above the state average.

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Housing priced close to the statewide average

Arnold's average home value ran approximately $279,059 this pass (Zillow, ZIP 63010, up 3.6% year-over-year), close to Missouri's own $268,423 statewide average.

A notably high combined sales tax rate

Arnold's combined sales tax rate ran a real, disclosed 11.6% this pass -- substantially above Missouri's statewide average combined rate (8.44%), driven in part by the Arnold Retail Corridor Transportation Development District.

A property tax rate that runs modestly below Missouri's average

Jefferson County's own effective property tax rate, on the one rate-based source found this pass (0.79%), runs modestly below Missouri's own 0.89% statewide average -- though this record discloses real, lower confidence in this specific figure given its single-source origin.

A median household income modestly below the national figure

Arnold's median household income ran approximately $78,370 (2024-vintage), running modestly below the national median.

Key takeaways

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Last reviewed: 2026-08-27. Independent research; not financial, tax, or legal advice -- confirm current figures with a local professional before making a decision.