Rates are set by fiscal year, effective October 1 each year. Find current rates in the continental United States ("CONUS Rates").
Federal law requires employers to report basic information on new and rehired employees within 20 days of hire to the state where the new employees work. Some states require it sooner.
The information is maintained in the National Directory of New Hires, which child support agencies use to locate a parent who owes child support and issue an income withholding order.
See the Office of Child Support Enforcement site for more information.
Your state's law may require employers to report sooner.
The purpose of the state reporting requirement is to facilitate child support enforcement by allowing child support agencies to locate parents who owe child support and to send income withholding orders to employers.
The idea is to prevent a parent from staying under the radar by moving from state to state to avoid paying child support.
An employer may report new hire information electronically. Many states will accept a completed W-4 with employer information added.
If an employer has employees in two or more states, the employer may elect to report new hires in each state or select one state in which to report all new hires, provided the employers registers with the Secretary of Health and Human Services either using:
Whichever state the employer selects to report all new hires, that state agency will automatically share the reported information with the other states.
For more information see: Office of Child Support Enforcement