Columbia Student Housing FlexRent Monthly Rent Planner FlexRent Admin Fields Lease Status Active Lease Type Monthly Payment Pre-Paid Residency Type rTx01b rTx02c rTx04e rTx0a Date We created CSH FlexRent options and this monthly rent calculator to help plan your housing budget. There are three ways to lower monthly rent costs: Make a larger upfront payment to reduce each monthly payment Make advance monthly payments to reduce each monthly payment Both: make an upfront payment and advance monthly payments If you are human, leave this field blank. Select Semester and Room Type