MO SB1790

Amends RSMo Section 137.073 to add new definitions for "data center" (facilities of 10,000+ square feet used for computing, cloud computing, or data storage) and "data center property" (all real and personal property associated with data centers)

Excludes data center property from being classified as "new construction and improvements" for purposes of calculating property tax levy revisions, meaning data center assessed values will be treated as existing property rather than new growth

Requires that when a data center is constructed or equipment is placed in service, the assessed value must be included in the total assessed valuation used to calculate required tax rate reductions, effectively preventing political subdivisions from raising additional revenue from data center development without voter approval

Maintains existing provisions requiring political subdivisions to reduce tax rates when assessed valuations increase to produce substantially the same revenue as the previous year, with the inflationary growth factor capped at the consumer price index or 5%, whichever is lower