Last updated: April 2026

Child Support Garnishment: The Employer Playbook

Child support garnishment outranks every other wage attachment an employer will see. Not credit cards. Not federal tax levies. Not student loans. When an Income Withholding Order lands on your desk, it goes to the top of the stack before anything else gets calculated.

Miss the deadline and the liability is yours, not the employee's.

What an Income Withholding Order Actually Requires

The form is federal: OMB 0970-0154, the standardized IWO. Every state child support agency, every private attorney, and every tribal agency uses the same two-page template. If you receive something that looks different, it is not a valid order and you should not withhold on it.

A valid IWO tells you five things: the obligor's name and Social Security number, the dollar amount per pay period, where to send the money, when to start, and how long to keep going. You convert the stated frequency to match your payroll cycle. If the order says 462 per month and you run biweekly, you multiply by 12 and divide by 26. The math lives on you.

The clock starts the day you receive the order.

Federal rules give you no more than 10 business days from the first pay date after receipt to begin withholding. Funds must hit the state disbursement unit within 7 business days of the paycheck. Some states tighten that to 2 or 3 days. California, for example, expects electronic remittance to the SDU within 7 calendar days through its CA SDU portal at Sacramento.

The 50 to 65 Percent Child Support Garnishment Ceiling

The Consumer Credit Protection Act sets a withholding cap that most payroll clerks misquote. Title III of the CCPA allows deductions for support obligations up to these exact limits on disposable earnings:

The cap is 50 percent when the worker supports a second family and is current on the obligation. The rate rises to 55 percent if that same worker is more than 12 weeks in arrears. Without a second family, the ceiling is 60 percent when current and 65 percent with more than 12 weeks behind. Those four numbers are the only ceilings the federal statute recognizes, and the order should tell you which bracket applies.

Disposable earnings means gross pay minus legally required deductions: federal income tax, Social Security, Medicare, state income tax, and mandatory state programs like SDI. Health insurance, 401(k) contributions, union dues, and charitable deductions do not reduce the disposable figure. Workers assume their 401(k) shrinks the withholding base. It does not.

A worker earning 1,200 gross per week with 240 in required taxes has 960 in disposable earnings. The maximum that can be withheld for a single-family, current obligor is 576. If the order says 650, you withhold 576 and report the shortage on the IWO return section. You do not fabricate the extra 74 out of the 401(k) or the health premium.

The tradeoff: state law can be stricter than federal law, and several states cap lower. If your employee lives in a state with a tighter limit, use the state number. The order itself usually tells you which ceiling applies.

Priority When Multiple Orders Hit the Same Paycheck

Support obligations beat everything else. A federal tax levy served Monday and a support order served Friday means the support order still takes precedence. The IRS itself gives way to any child support order that was in place before the levy attached. Creditor garnishments, student loan AWGs, and state tax levies all wait their turn.

What happens with two support orders on one worker? You prorate. If total orders exceed the CCPA ceiling, divide the available amount across each order by the ratio each order bears to the total ordered. A worker with two IWOs for 400 and 300 weekly, and a 576 disposable ceiling, gets 329 toward the first and 247 toward the second.

Some states require a different method. Texas, for instance, pays current support in full before any arrears on a second order. Read the order.

The Personal Liability Trap

Here is the part that turns a paperwork problem into a lawsuit. Under section 466(b)(6)(D) of the Social Security Act, an employer who fails to withhold under a valid IWO becomes personally liable for the full amount that should have been withheld. Not a penalty. The actual missed support.

State laws stack additional penalties on top. Florida charges 250 per missed payment. New York charges up to 500 plus the withheld amount.

Ohio assesses a 50 per pay period penalty and allows the state to sue for treble damages. The 2019 Kansas case Kelly v. VinZant Trucking saw a carrier hit with 41,000 in back support plus fees for ignoring an IWO for 14 months.

This is the trap: the ex-spouse does not sue the obligor. The state sues the employer. You become the collection target because you had the paycheck and did not act.

The exception worth knowing: if the employee quits or is fired before the first pay period affected by the order, you owe nothing. You return the IWO with termination details and the last known address within 10 days. Do this in writing.

Fees, Notice, and the Employee Conversation

Most states let employers charge a small administrative fee per withholding. Illinois allows 5 per pay period. Texas permits 10 per month.

California allows 1.50 per transaction. You deduct this from the employee's wages, not from the support payment. The amount going to the SDU stays whole.

You must give the employee a copy of the order. No sit-down conversation is required, and none is advised. Hand them the paperwork, point to the HR contact, and move on.

Do not discipline, demote, or fire a worker because of a support order. Federal law prohibits it. So does every state statute on the topic. Penalties for retaliation start at 1,000 and climb.

The order stays active until the issuing agency sends a termination notice. Not when the employee says their kid turned 18. Not when the ex remarries. Only a written release from the state ends the obligation.

Remittance Mechanics and the State Disbursement Unit

Every state operates a single SDU that receives all support payments and routes them to custodial parents. You send money to that one address, even if the order came from a different state. The interstate matching is the state's job, not yours.

Electronic payment is now the rule in most jurisdictions. Employers with 50 or more workers must use EFT or EDI in states like New Jersey, Pennsylvania, and Michigan. Paper checks are still accepted by some SDUs but slow down processing and invite lost-payment disputes. If you have the choice, pay electronically.

Include the case number, the obligor's Social Security number, and the pay date on every remittance. An unidentified payment sits in a suspense account and does not credit the worker's balance. The state blames you when the custodial parent calls asking where the money went.

When this is wrong: if you operate in a state that still runs its own county-level collection offices, confirm with the court that issued the order whether the statewide SDU applies. A handful of tribal orders route outside the SDU system entirely.

Frequent Mistakes That Cost Real Money

Payroll processors see the same errors on repeat. Four show up more than any others.

First, treating the IWO as advisory until the employee confirms it. The order is self-executing. You act on it the day it arrives, not after a phone call with the worker.

Second, using gross pay instead of disposable earnings as the CCPA base. This inflates what you withhold and creates a claim from the employee for wrongful deduction.

Third, stopping withholding when the employee says the case is closed. Only a written termination notice from the state ends it.

Fourth, paying the custodial parent directly because the worker asked you to. Do not. Every dollar routes through the SDU or the case does not credit. The worker still owes the money.

However, the single costliest error is missing the first pay period after receipt because the order sat in someone's inbox. Set a 48-hour intake rule and log every IWO the day it arrives.

Your Action Steps This Week

Pull every active IWO in your files and verify three things per order: the disposable earnings base, the current withholding amount against the CCPA ceiling, and the SDU address. If any of those are stale, fix them before the next payroll run.

Build an intake checklist. Date received, date of first affected paycheck, frequency conversion math, employee notification sent, first remittance confirmed. Keep it with the order in a locked HR file for the full period plus three years after termination.

Confirm your payroll software routes child support to a separate GL account. Mixed in with creditor garnishments, it gets harder to audit and harder to defend if a state agency questions a late payment.

If you are dealing with a worker who has multiple orders, stacked levies, or a contested balance, read our guide on employer garnishment obligations before your next pay run. For a worker asking how to fight an order, point them to how to stop wage garnishment. If the deduction is bumping into exemption territory, the garnishment exemptions breakdown explains what the worker can actually protect. The full picture lives on the wage garnishment hub. If the worker crosses state lines for work, confirm withholding jurisdiction on our multi-state payroll guide first.

When the order itself looks wrong, go to the source: the federal Office of Child Support Enforcement employer page publishes the current IWO form and a state-by-state contact directory.

This is not legal or financial advice. Consult a qualified professional for your specific situation.