Millions of university graduates are set to see the interest rate on their student loans rise from September. Student loan interest rates are usually set each September using the RPI rate from March of the same year. This figure was today confirmed to be 4.1% so the vast majority of repayment plans will see their interest rate increase by this rate. This includes graduates on a Plan 1, Plan 4 and Plan 5 student loan, of which the current rate is 3.2%. For those with Plan 2 or Plan 3