The BID draws a specific geographic boundary of which it then collects an annual assessment from each commercial property owner within that boundary. For example, The Gateway to Milwaukee BID #40 commercial property owners each contribute 85 cents for every 1000 dollars of property value they are assessed by the City. This assessment is on the lower end of the spectrum compared to BIDs city-wide, and has remained consistent since the creation of the BID in 2006. The map below shows the detailed geography of the Airport Gateway Business Improvement District #40 boundary.