The files "bg_binned_income_proj.csv" and "bk_binned_income_proj.csv" contain income projections in 2015 dollars for Washington state (under census geographic boundary 2020) from 2020 to 2100 at the block group and block level, respectively, based on different Shared Socioeconomic Pathways (SSP2, SSP3, and SSP5). The income projections are represented by the projected number of households for each of the three different income bins. In the files, GISJOIN is the unique identifier for each block (or block group) . Each number of households projection is stored in a column, where the first four characters of the column name represent the projection year (e.g., 2020, 2030), the following four characters represent the SSP (e.g., SSP2, SSP3, SSP5), and the remaining characters indicate the income bin (Income1 represents annual household income less than $18,150, Income2 represents annual household income between $18,150 and $48,396, and Income3 represents annual household income greater than $48,396). For example, "2020SSP2Income1" indicates the household number projection for the first income bin in 2020 under SSP2. "README.txt" describes the general steps for income data generation.