The average custodial salary at Bonham Isd was $25,602 , which is 3 percent lower than the average salary for this job in Texas, and 22 percent lower than the national average for this job . Custodial salaries at Bonham Isd typically range from $25,240 to $26,499 (25th to 75th percentile). The highest reported custodial salary was $27,539. There are 16 employees at Bonham Isd with the job title custodial.