There is no meaningful grace period for child support: a payment is legally delinquent the day after the due date in your order, and how late you can be on child support before penalties start depends less on time than on which penalty you’re asking about. Some consequences, like wage withholding and the accrual of an enforceable judgment, attach immediately. Others wait for specific dollar or time thresholds — interest around 30 days late, tax refund interception at as little as $150 in arrears, passport denial at $2,500, and federal criminal charges once you owe more than $5,000 or fall more than a year behind on an out-of-state case.
The Day-After Rule
Your court or administrative order sets a specific due date, typically the first or fifteenth of the month. If the payment isn’t received by that date, it’s late. A negotiated agreement occasionally builds in a short grace window, but that’s the exception.
Federal law goes further than just calling the payment late. Every child support payment becomes a judgment by operation of law on the date it comes due.1Office of the Law Revision Counsel. 42 USC 666 – Requirement of Statutorily Prescribed Procedures to Improve Effectiveness of Child Support Enforcement Unpaid amounts carry the same legal weight as a court judgment the moment they’re overdue, they’re enforceable across state lines, and no state can retroactively erase them. Every month you fall behind adds another enforceable judgment to your record.
If you’re paid through an income withholding order, your employer deducts the payment from wages before you see the money, and late payments are rare.2Administration for Children & Families. Processing an Income Withholding Order or Notice For self-employed parents or anyone paid through channels withholding doesn’t reach, the burden of paying on time is entirely yours.
What Triggers Each Penalty
Enforcement doesn’t turn on one number of days late. Different tools have different triggers, and they stack.
Interest: Around 30 Days
Most states charge interest on unpaid child support, and it typically starts accruing once a payment is a certain number of days overdue, often 30, though the exact trigger depends on state law. Rates vary widely. Some states charge nothing; others go as high as 18 percent per year. Around 6 percent is common, and several states tie their rate to a market benchmark. Interest is automatic — no one files a motion to add it. It just accumulates.
Wage Garnishment: Immediately
Wage garnishment is usually the first tool used, and it doesn’t require you to be a particular number of days late. Once an order is in place, your employer must withhold a portion of your paycheck and send it to the state disbursement unit or the custodial parent, or face penalties.3U.S. Department of Labor. Fact Sheet 30 – Wage Garnishment Protections of the Consumer Credit Protection Act (CCPA) Federal law caps the amount at 50 or 60 percent of disposable earnings depending on whether you support another spouse or child, with an added 5 percent if your arrears are more than 12 weeks old.4Office of the Law Revision Counsel. 15 USC 1673 – Restriction on Garnishment Social Security retirement and disability benefits can also be garnished for child support under the same caps; SSI is generally exempt.5Social Security Administration. Can My Social Security Benefits Be Garnished or Levied
Tax Refund Interception: $150 or $500 in Arrears
The federal Treasury Offset Program intercepts tax refunds from parents who owe child support and applies them to the balance.6Bureau of the Fiscal Service. Treasury Offset Program The thresholds are low: $150 in arrears if the custodial parent receives TANF, $500 if not.7Administration for Children & Families. When Is a Child Support Case Eligible for the Federal Tax Refund Offset Program Most parents with any real arrears qualify. You receive a Pre-Offset Notice explaining the debt and your right to contest it, and a Notice of Offset when funds are actually taken.8Administration for Children & Families. How Does a Federal Tax Refund Offset Work State tax refunds are subject to similar interception under state programs.
License Suspension: Varies by State
All 50 states can suspend or revoke licenses for unpaid support, including driver’s licenses, professional licenses (nursing, law, real estate), business licenses, and recreational permits like hunting and fishing.9National Conference of State Legislatures. License Restrictions for Failure to Pay Child Support Some states also suspend vehicle registrations or concealed carry permits. The delinquency threshold that triggers suspension varies: some states act after a single month of missed payments, others wait until you’re three to six months behind or owe a set dollar amount. You’ll get a notice of intent before suspension, giving you a chance to pay, arrange a payment plan, or request a hearing. Reinstatement typically requires paying arrears in full or entering an approved repayment agreement.
Passport Denial: $2,500
If you owe more than $2,500 in past-due support, the federal government will refuse to issue or renew your passport, and the State Department can revoke or restrict an existing one.10Office of the Law Revision Counsel. 42 USC 652 – Duties of Secretary Clearing the hold means paying through your state agency, which then notifies HHS, which removes your name from the lookout list and reports the change to the State Department. That process runs roughly two to three weeks after payment is confirmed.11U.S. Department of State. Pay Child Support Before Applying for a Passport Paying off the balance the day before an international flight won’t get you on the plane.
Property Liens and Bank Levies: Once Arrears Exist
State agencies and courts can place liens on real estate, vehicles, and financial accounts.12Administration for Children and Families (ACF). Child Support Handbook – Chapter 5 – Collecting Support In many states, liens arise automatically once support is past due, with no separate court action needed. Through the Financial Institution Data Match program, agencies identify bank accounts held by parents who owe arrears and can freeze and seize funds after notice.13Administration for Children and Families. Financial Institution Data Match Overview
Credit Reporting
Agencies can report arrears to the major credit bureaus, and the entry can stay on your credit report for up to seven years, even after you pay the balance off. Agencies generally must notify you first and give you a window, often 30 days, to dispute the accuracy or pay the arrearage.
Civil Contempt and Jail
When other tools fail, the custodial parent or state agency can ask the court to hold you in civil contempt for willful nonpayment. A contempt finding requires the court to determine you had the present ability to pay and chose not to, and the judge typically sets a “purge payment” you must make to avoid or end jail time. Incarceration is treated as a last resort after other enforcement methods have been used.14Administration for Children and Families. Final Rule – Civil Contempt – Ensuring Noncustodial Parents Have the Ability to Pay
Federal Criminal Charges: $5,000 or One Year
Willful nonpayment across state lines can trigger federal prosecution. Owing more than $5,000, or being more than a year behind on payments owed to a child in another state, can support a federal misdemeanor charge. If the amount exceeds $10,000 or the delinquency stretches past two years, it becomes a felony.
If You Can’t Pay, File to Modify Before You Fall Behind
Job loss, reduced hours, disability, or another substantial change in circumstances can support a modification of your support order going forward. The catch: modifications apply only from the date you file the petition, at the earliest. They are never retroactive. Under the Bradley Amendment, every payment that came due before you filed is locked in as an enforceable judgment that no state can reduce or forgive after the fact.15Office of the Law Revision Counsel. 42 USC 666 – Requirement of Statutorily Prescribed Procedures to Improve Effectiveness of Child Support Enforcement Waiting six months in hopes things improve leaves you with six months of arrears at the original amount.
To request a modification, contact your local child support agency or file a petition with the court that issued the original order.16Administration for Children & Families. What Is the Role of the Federal Office of Child Support Enforcement Some states offer a faster administrative process. File before you fall behind, not after.
How Long Arrears Stay Collectible
Arrears don’t disappear when your child turns 18. Enforcement windows range from about five years to indefinite depending on the state, with ten years being common, and many states let the custodial parent renew the judgment. Because each missed payment is its own judgment under federal law, the statute of limitations can reset with each one, making it very hard to wait out. Interest continues accruing the entire time, and every enforcement tool above — garnishment, liens, tax intercepts, passport denial — remains available as long as a balance exists. Child support debt also survives bankruptcy.