Child-support withholding generally cannot take an employee’s entire disposable paycheck under the federal Consumer Credit Protection Act. The support cap ordinarily ranges from50 to 65 percent, depending on other family support and the age of arrears. State law may provide a lower applicable limit. [1]
Use disposable earnings, not the deposit amount
For this law, disposable earnings means earnings remaining after amounts required by law to be withheld. It is not necessarily take-home pay after every voluntary insurance, retirement, loan, or savings deduction. The statute’s definition must be applied before calculating the percentage. [2]
Earnings include compensation for personal services and specified periodic pension or retirement payments. Collection from a bank account, tax refund, or other asset can raise different rules; do not apply the payroll percentage mechanically to every source of money.
The support percentages
If the employee supports another spouse or dependent child apart from those covered by the order, the ordinary federal ceiling is50 percent. Otherwise it is60 percent. The ceiling increases by five percentage points for qualifying arrears older than the statutory twelve-week period. The exact order and arrears allocation matter. [1]
These are maximum withholding limits, not formulas for setting the underlying support obligation. A court may have ordered a different amount, and an unpaid balance can remain even when payroll cannot withhold all of it at once.
Example: voluntary deductions make the check look smaller
An employee may compare the support deduction with a bank deposit reduced by voluntary retirement contributions and conclude the percentage is wrong. Payroll must instead identify the legally defined disposable earnings and applicable cap. Ask for the calculation before assuming either the employer or employee’s estimate is correct.
Multiple orders require coordination under the applicable rules. They do not create unlimited permission for each creditor to take the maximum separately.
What to do about an excessive deduction
Obtain pay statements, the withholding notice, current support order, arrears statement, and evidence relevant to supporting other dependents. Ask payroll and the issuing agency to explain the income base and percentage used. Seek correction through the appropriate process promptly.
Do not simply stop paying or tell the employer to disregard a valid notice. If the underlying obligation is unaffordable after a job or income change, request modification through the court or agency with authority. A payroll cap does not automatically modify the order or erase accumulated arrears.
SSI raises a different support-enforcement question. Retirement and disability income also require the correct benefit classification.
Primary sources
Sources checked: October 31, 2026.