The 2023 Federal Poverty Level (FPL) Calculator for Illinois. Please select your household size. Then you will see poverty levels for 100%, 133%, 150%, 200%, 250%, 300% and 400% thresholds. These numbers are for annual calculations. If you are searching for monthly figures, please check here. These figures are for Illinois State and other 47 Contiguous States and D.C. Alaska and Hawaii have different Poverty Level figures.