The average custodial salary at Llano Isd was $25,542 , 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 Llano Isd typically range from $21,840 to $28,080 (25th to 75th percentile). The highest reported custodial salary was $35,881. There are 14 employees at Llano Isd with the job title custodial.