Lump-Sum Child Support Payments: Limits, Coverage, and Disputes

When you owe back child support and a bonus, severance check, commission, or settlement lands, the agency enforcing your order can take a large share of it in one shot. Federal law caps lump sum child support withholding at 50% to 65% of your disposable earnings from that payment, with the exact percentage set by whether you’re supporting another spouse or child and whether your arrears are more than twelve weeks old. Because the cap runs per payment, a single lump sum can produce a far bigger deduction than any regular paycheck would, and the money usually leaves your employer’s hands before you see it.

How Much Can Be Taken From a Lump Sum

The ceiling comes from the Consumer Credit Protection Act at 15 U.S.C. § 1673(b).¹ The percentages apply to disposable earnings, which the statute defines as what’s left after amounts “required by law to be withheld.”² Federal income tax, Social Security, and Medicare come out first. Voluntary deductions like retirement contributions and elective insurance premiums do not, so the disposable earnings figure is larger than your take-home pay.

The caps are:

50% if you are currently supporting another spouse or dependent child
55% if you are supporting another family and your arrears are more than 12 weeks old
60% if you are not supporting another spouse or dependent child
65% if you are not supporting another family and your arrears are more than 12 weeks old

A quick example. You receive a $10,000 bonus and $2,500 is withheld for federal taxes and FICA. Your disposable earnings from that payment are $7,500. At the 60% rate, up to $4,500 can be routed to child support; at 65%, up to $4,875. You keep at least 35% of your disposable earnings from the payment even in the worst case, because an employer cannot withhold 100% of a lump sum that qualifies as earnings, no matter how large the arrearage.³

Which Lump-Sum Payments Are Covered

Federal law defines income for child support purposes broadly. Under 42 U.S.C. § 666, it includes wages, salaries, commissions, bonuses, worker’s compensation, disability payments, pensions, retirement benefits, and interest.⁴ A lump sum is simply any of these that arrives as a single, non-recurring amount. In practice that covers year-end bonuses, sales commissions paid quarterly, severance packages, signing bonuses, accrued vacation payouts, and insurance settlements.

Child support agencies can also reach lump sums from outside your employer, including unemployment compensation, workers’ compensation benefits, proceeds from judgments and legal settlements, and lottery winnings.⁴ The Administration for Children and Families confirms that child support can be withheld from all of these.⁵

A few narrow payment types sit outside the CCPA caps because they aren’t “earnings” in the statutory sense. A Department of Labor opinion letter identified three: buybacks of company shares, workers’ compensation payments specifically for medical reimbursement, and wrongful termination insurance settlements covering compensatory or punitive damages. Of the 18 payment types the Department of Labor analyzed, 15 were subject to the standard withholding limits.³ If the payment doesn’t qualify as earnings, the CCPA percentage ceiling doesn’t apply to it in the usual way.

How the Withholding Happens

Many states require your employer to notify the child support agency before releasing a lump-sum payment to anyone with an active Income Withholding Order. Thresholds and procedures vary. Reporting minimums commonly fall between $150 and $500, and some states have no separate lump-sum reporting requirement. The agency may send a standard IWO back to the employer, or it may use a different document aimed specifically at the lump sum.³

Once the amount is set, the employer deducts it and sends the money to the State Disbursement Unit rather than directly to the custodial parent. Every state operates an SDU for this purpose, and it must distribute the custodial parent’s share within two business days of receiving the payment when the identifying information is complete.⁶ The employer’s deadline to send the withheld money typically runs one to seven days after the pay date, controlled by the law of the state where you work.⁷

Most states let the employer charge you a small administrative fee for each withholding, usually between $1.50 and $10 per payment.⁸ If the fee plus the child support withholding would push past the CCPA limit, the employer takes the full fee first and sends what’s left toward support. The shortfall doesn’t disappear. It becomes additional arrears on your account.

Employers who ignore an IWO or fail to remit withheld support face penalties in every state, including repayment of the full amount that should have been withheld plus additional fines.⁸ That matters for you because it’s the reason your payroll department will almost always act on a lump-sum order rather than let the money slip past.

What Happens if You Have Other Garnishments

Child support must be withheld before other garnishments, with one exception. An IRS tax levy entered before the date your underlying child support order was established takes priority.⁷ Everything else—wage assignments, non-tax federal debts, state and local tax obligations, and creditor garnishments—falls below child support. When both a tax levy and a child support order exist and the support order came first, the IRS will release from the levy whatever amount is needed to pay the court-ordered support.⁹

Federal Tax Refunds Are a Separate Grab

Employer withholding is not the only route to a one-time payment. The Federal Tax Refund Offset Program, authorized by 42 U.S.C. § 664, lets states intercept your federal refund when a state agency certifies that you owe at least $500 in arrears. The Treasury then withholds up to the full arrearage from the refund and charges a processing fee of up to $25 per case.¹⁰

Tax refund offsets are not subject to the CCPA percentage caps. The Treasury can take the entire refund up to what you owe. If you have arrears, treat your refund as at risk every filing season.

Independent Contractors

Federal withholding was built around W-2 employment, and independent contractors sit in a gray zone. The CCPA’s limits focus on the employer-employee relationship and do not clearly apply to payments made to independent contractors. Federal law also does not currently require entities that hire contractors to report them to the State Directory of New Hires, which is the data system that triggers automatic income withholding for traditional employees.

Some states still allow their child support agencies to send withholding orders to businesses paying contractors, including orders aimed at lump sums, but enforcement is more manual. State caps on how much of a contractor payment can be withheld vary—many states have no statutory percentage limit, while a smaller number cap withholding at around 50%. Because contractor payments cover business expenses as well as income, aggressive withholding can threaten the contractor’s ability to keep working.¹¹

Disputing a Lump-Sum Withholding

Only the obligor—the parent who owes support—can dispute the terms of an Income Withholding Order. Your employer cannot contest it for you.⁷ The dispute goes to the agency or court that issued the order. The Department of Labor does not handle arrearage calculations or garnishment priority questions.¹²

The common grounds for challenging a lump-sum deduction are that the arrearage balance is wrong (often because past payments weren’t credited), that the payment type isn’t earnings under the CCPA, or that the wrong percentage was applied given your current family situation. Speed matters. Once the money reaches the SDU and is paid out to the custodial parent, getting it back is much harder than correcting the amount before it leaves your employer.

You Cannot Be Fired for the Garnishment

Federal law prohibits an employer from firing you because your wages are being garnished for any single debt. Under 15 U.S.C. § 1674, an employer who violates this rule faces a fine of up to $1,000, imprisonment of up to one year, or both.¹³ The protection applies even when the withholding comes from a large lump sum that creates extra payroll work. It covers garnishment for “any one indebtedness,” so a single child support order is clearly within it; whether the shield extends when multiple orders from different cases exist is less clear.

1
Office of the Law Revision Counsel. 15 USC 1673 – Restriction on Garnishment
2
Office of the Law Revision Counsel. 15 USC 1672 – Definitions
3
Administration for Children and Families. Bonus/Lump Sum Reporting – Answers to Employers’ Questions
4
Office of the Law Revision Counsel. 42 USC 666 – Requirement of Statutorily Prescribed Procedures to Improve Effectiveness of Child Support Enforcement
5
Administration for Children and Families. Income Withholding
6
Office of the Law Revision Counsel. 42 USC 654b – Collection and Disbursement of Support Payments
7
Administration for Children and Families. Processing an Income Withholding Order or Notice
8
Administration for Children and Families. Income Withholding – Answers to Employers’ Questions
9
Internal Revenue Service. Information About Wage Levies
10
Office of the Law Revision Counsel. 42 USC 664 – Collection of Overpayments of Title IV-A, Title IV-E, and Title XIX Payments; Collection of Past-Due Support From Federal Tax Refunds
11
U.S. Department of Health and Human Services. Independent Contractors and Nontraditional Workers
12
U.S. Department of Labor. Fact Sheet 30 – Wage Garnishment Protections of the Consumer Credit Protection Act
13
Office of the Law Revision Counsel. 15 USC 1674 – Restriction on Discharge From Employment by Reason of Garnishment