What Is CA SUI SDI Tax?

For tax purposes, in California, SUI stands for State Unemployment Insurance and SDI stands for State Disability insurance, according to the State of California Employment Development Department. In 2014, the CA SUI tax rate is Schedule F+. Employers are taxed between 1.5 percent and 6.2 percent on each employee's income up to $7,000. The 2014 CA SDI tax rate is 1 percent on income up to $101,636; the maximum withholding is $1,016.36 per employee.