The average custodial salary at Newton Isd was $24,161 , which is 8 percent lower than the average salary for this job in Texas, and 27 percent lower than the national average for this job . Custodial salaries at Newton Isd typically range from $14,355 to $19,504 (25th to 75th percentile). The highest reported custodial salary was $104,357. There are 12 employees at Newton Isd with the job title custodial.