Click on tab to return FAQs listings. Frequently Asked Questions Topic: Wage Attachments Q:How long does it take for payments to be deducted from the non-custodial parent's paycheck? If could take four (4) to six (6) weeks. The following percentages of the net income of the paying parent are what the D.C. child support guidelines are based on: # of Children Age Percentage of Net Income (Dependent on Level of Income) 1 0-6  20-23%  1  7-12  22-25.3%  1  13-21  23-26.45%  2  0-6  26-29%  2  7-12  28.6-31.9%  2  13-21  29.9-33.5%  3  0-6  30-33%  3  7-12  33-36.3%  3  13-21  34.5-37.95%  4+  0-6  32-35%  4+  7-12  35.2-38.5%  4+  13-21  36.8-40.25%  Child Support Income Available Under the Federal Consumer Protection Act The total amount actually withheld for support, the child's insurance premium, if ordered, and employer withholding fee may not exceed the maximum amount permitted by Section 303(b) of the Federal Consumer Credit Protection Act 15USC 1673(b); or 2) the amounts allowed by the State of the employee's principal place of employment. The federal limit applies to the aggregate disposable weekly earnings (ADWE). ADWE is the net income left after making mandatory deductions such as: state, federal, local taxes; Social Security taxes; and Medicare taxes. The federal CCPA limit is 50 percent of the ADWE for child support and alimony, which is increased by: 1) 10 percent if the employee does not support a second family; and/or 2) 5 percent if arrears are more than 12 weeks old.