Stafford Subsidized Loans are federally guaranteed loans based on financial need. Interest does not accrue on the loan while you are in school at least half time, or during any future deferment periods. The federal government "subsidizes" (or pays) the interest during these times. Additionally, there are maximum amounts you can receive per school year. Stafford Unsubsidized Loans are federally guaranteed loans that are not based on financial need. Interest does accrue from the time the loan is disbursed to the school. Additionally, there are maximum amounts you can receive per school year for dependent and independent students. that is it !