SUI is an acronym for "state unemployment tax." This deduction from your paycheck is used to provide funds to your state for temporary support of workers who have lost their jobs. State unemployment benefits are generally limited to a specific time period, and those who receive them must be actively searching for a job.
SDI is an acronym for "state disability insurance." Some states call it TDI for "temporary disability insurance." Not every state has this tax, but those that do require payroll deductions that help fund short-term (generally a maximum of six months) disability benefits for workers who become disabled. Generally, these benefits are limited and are not intended to replace a worker's entire income.
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