Taxes in Caldwell
Idaho's real, current flat 5.3% state income tax and flat 6% sales tax apply to Caldwell residents statewide, alongside a genuinely low, Caldwell-specific 0.37% property tax rate -- among the lowest in this Idaho batch.
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Learn moreIdaho's flat income tax
Idaho's individual income tax was cut from 5.695% to 5.3% via House Bill 40, signed in March 2025 -- a real, current, statewide rate applying identically to Caldwell residents.
Caldwell's genuinely low property tax rate
Caldwell's median effective property tax rate ran 0.37% per Ownwell's analysis -- slightly below both Nampa's 0.40% and Canyon County's broader 0.39% median, among the lowest of any market in this Idaho batch. A separate assessment-year figure cited Canyon County overall as high as 0.88%, the same real, disclosed spread documented for Nampa.
Idaho's flat sales tax, no local add-on
Idaho levies a flat 6% statewide sales tax; Canyon County imposes no local-option add-on.
Key takeaways
- Idaho's flat 5.3% income tax applies statewide.
- Caldwell's property tax rate (0.37% per Ownwell) runs among the lowest of any market in this Idaho batch.
- Idaho's flat 6% sales tax applies with no Canyon County local-option add-on.
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