How Much Back Child Support Is a Felony in Oregon?

Oregon sets no dollar threshold that turns back child support into a felony. Under ORS 163.555, criminal nonsupport is a Class C felony from the outset, so any knowing failure to pay court-ordered support can be prosecuted at the felony level regardless of the balance owed.¹ There is no $5,000 line, no $25,000 line, and no misdemeanor-to-felony ladder based on arrears. A conviction carries up to five years in prison and a fine as high as $125,000.

That flat rule surprises people, because many states do use tiered systems. Oregon does not. What matters under state law is not how much you owe but whether the state can prove you knowingly failed to pay when you had the ability to earn.

What the State Has to Prove

A person commits criminal nonsupport if they are a parent, legal guardian, or someone else legally responsible for a child under 18 and they knowingly fail to provide support.¹ “Knowingly” is doing real work in that sentence. The prosecution must show a court-ordered obligation, awareness of it, an ability to generate income, and the absence of payment. Missed payments alone are not the whole case.

The statute also shuts down several arguments parents commonly raise. It is not a defense that either parent remarried, that new children were born from a later relationship, or that someone else is currently supporting the child.¹ A stepparent’s income or a grandparent picking up the slack does not erase criminal exposure.

Penalties for a Conviction

The sentence depends on how the offense is finally classified:

Class C felony: up to five years in prison and a fine of up to $125,000.²
Class A misdemeanor, if reduced: up to 364 days in county jail and a fine of up to $6,250.³

A criminal conviction does not erase the underlying debt. Every dollar of arrears remains owed, and a felony record follows the parent through job applications, housing screenings, and professional licensing long after any sentence ends.

How Prosecutors Decide Whether to Charge a Felony

The statute puts the ceiling at a felony, but district attorneys have discretion. A case can be filed as a Class A misdemeanor, or a felony charge can be reduced through a plea agreement. Several factors shape that call: the amount of arrears, how long the non-payment has lasted, the parent’s prior criminal history, and their overall circumstances. A parent who fell behind by a few months after a job loss looks very different to a prosecutor than someone who has dodged payments for years. A prior conviction for criminal nonsupport makes felony-level charging almost certain the next time around.

So while the answer to “how much” is technically “any amount,” the practical answer is that larger arrears and longer periods of willful non-payment push a case toward the felony end of what the statute already allows.

The Lawful Excuse Defense

Oregon law provides one path to defeat a criminal nonsupport charge: proving a “lawful excuse” for the failure to pay.¹ The statute does not define what counts, leaving courts to evaluate case by case. A serious medical disability that genuinely prevented any work might qualify. Being unemployed or underemployed when you could have earned more likely will not.

There is a procedural trap. If you plan to rely on this defense, you must give the district attorney written notice at least 30 days before trial describing the nature of the excuse. Miss that deadline without good cause, and the court can bar you from presenting any evidence of your lawful excuse at trial.¹ That is the kind of rule that makes getting a lawyer early genuinely necessary.

When Federal Dollar Thresholds Do Apply

If the parent who owes support lives in a different state from the child, federal law adds a second track, and here dollar thresholds actually exist. Under 18 U.S.C. § 228, it is a federal crime to willfully fail to pay support for a child in another state when the debt has gone unpaid for more than one year or exceeds $5,000. A first offense at that level is punishable by up to six months in prison.⁴

The penalties climb sharply if the parent crosses state lines specifically to avoid paying, if the debt exceeds $10,000, or if the obligation has been unpaid for more than two years. Those situations carry up to two years in federal prison, and the sentencing court must order restitution equal to the full unpaid balance.⁴ The HHS Office of Inspector General investigates these cases on referral from state agencies, and the Department of Justice decides whether to prosecute.⁵

So the short answer for interstate cases: $5,000 or one year of non-payment for the lower federal offense, $10,000 or two years for the higher one. Neither threshold changes the Oregon rule that state charges start at felony.

Modify the Order Before Arrears Grow

This is where parents get into trouble. Income drops, a health crisis hits, a job disappears, and instead of going back to court they simply stop paying. Arrears compound. By the time the situation reaches a prosecutor, the balance is enormous and the pattern looks willful.

Under ORS 107.135, a court can modify child support when there has been a substantial change in economic circumstances, including job loss, a significant income reduction, disability, or a major change in the child’s needs.⁶

The critical limit: modifications only work going forward. Federal law under 42 U.S.C. § 666(a)(9)(C) prohibits courts from retroactively reducing child support that has already come due.⁷ Every missed payment becomes a judgment the moment it is due, and no judge can forgive it after the fact. A court may adjust the amount only from the date a modification petition is formally filed and the other party is notified. Waiting even a month to file locks in another month of arrears permanently, and those arrears are the raw material a prosecutor uses to build a criminal nonsupport case.

1
Oregon State Legislature. Oregon Code 163.555 – Criminal Nonsupport
2
Oregon State Legislature. Oregon Code 161.605 – Maximum Terms of Imprisonment for Felonies
3
Oregon State Legislature. Oregon Code 161.615 – Maximum Terms of Imprisonment for Misdemeanors
4
Office of the Law Revision Counsel. 18 USC 228 – Failure to Pay Legal Child Support Obligations
5
Office of Inspector General. About the Child Support Enforcement Program
6
Oregon Public Law. Oregon Code 107.135 – Vacation or Modification of Judgment
7
Office of the Law Revision Counsel. 42 USC 666 – Requirement of Statutorily Prescribed Procedures to Improve Effectiveness of Child Support Enforcement