The average custodial salary at Ferris Isd was $25,191 , which is 4 percent lower than the average salary for this job in Texas, and 24 percent lower than the national average for this job . Custodial salaries at Ferris Isd typically range from $21,736 to $27,643 (25th to 75th percentile). The highest reported custodial salary was $42,322. There are 25 employees at Ferris Isd with the job title custodial.