MO HB913

Phases out the "Group A" and "Group B" county sales tax distribution system in St. Louis County over three years (2016-2018), transitioning to a population-based distribution formula where all cities, towns, villages, and unincorporated areas receive revenue proportional to their share of total county population

Reduces the annexation adjustment factor from 10% to 6.67% in 2016, then to 3.33% in 2017, before eliminating it entirely in 2018

Changes distribution of sales taxes on motor vehicles, trailers, boats, and outboard motors from a 75%/25% split (with 25% based on transaction location) to 100% population-based distribution by January 1, 2018

Expands municipal sales tax options for cities in charter counties with 900,000+ population from one-eighth or one-fourth percent to also include three-eighths or one-half percent rates, subject to voter approval

Eliminates the point-of-sale distribution advantage for "Group A" municipalities (those with pre-existing city sales taxes) by January 1, 2018, replacing it with equal per-capita distribution across all jurisdictions