Reviewed August 2026
Child Support in Oregon
Oregon calculates child support with the income shares model, authorized by Oregon Revised Statute 25.275. The Oregon Administrative Rules add both parents' gross incomes together and apply a statewide schedule to that total. The resulting obligation is then split between the parents, based on each parent's share of the combined income. A parent can get a support order as part of a circuit court family law case. Or a parent can apply through the Oregon Child Support Program, run by the Department of Justice. That program is the state's IV-D agency for establishing and enforcing support. Oregon circuit courts hear contested support matters. The Child Support Program can also set up and modify orders administratively for parents who apply for its services.
Virdix's document-preparation product currently prepares divorce paperwork for California and Florida cases. This page explains how child support works under Oregon law for people researching before they file. It is not legal advice, and Virdix does not prepare or file Oregon paperwork. See how Virdix works for California divorces.
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The Oregon income shares guideline
Oregon's guideline comes from ORS 25.275 and is detailed in the Oregon Administrative Rules. It combines both parents' gross incomes, then looks up the basic obligation the state's schedule assigns to that combined amount. That obligation is then split between the parents, in proportion to their income share.
The guideline also factors in health insurance costs and work-related child care expenses. And it includes an adjustment for parenting time, based on the actual number of overnights each parent has with the child.
Applying through the Oregon Child Support Program
The Oregon Child Support Program sits inside the Department of Justice. It is the state's IV-D agency. A parent can apply through the program's website for paternity establishment, a support order, or enforcement.
A parent already in a circuit court case for divorce, custody, or paternity can also have support decided as part of that case.
Which court hears the case
Oregon circuit courts hear contested child support matters tied to divorce, custody, and paternity cases. The Oregon Judicial Department publishes self-help resources for family and child support matters.
Cases the Child Support Program opens administratively can also reach a circuit court, when a party requests a hearing.
Modifying an Oregon order
An Oregon order can be modified after a substantial change in circumstances since it was set. A significant change in either parent's income or the parenting time schedule counts. The Child Support Program also runs periodic administrative reviews of the orders it manages. It can request a modification when reapplying the guideline to current circumstances produces a materially different result.
A parent seeking modification files with the circuit court that issued the order. Or they request a review through the Child Support Program, for agency-managed cases.
Enforcement
The Oregon Child Support Program enforces orders with standard IV-D tools. These include income withholding, intercepting state and federal tax refunds, credit bureau reporting, and license suspension for significant arrears.
A parent owed support who needs enforcement help can open a case with the program. This works even when the original order came from a private circuit court filing.
Sources: Oregon Administrative Rules, Division 1401, child support guidelines, Oregon Revised Statutes Chapter 25, Oregon Child Support Program, Oregon Judicial Department, family and child support help
Not independently confirmed
- The exact overnight thresholds used in Oregon's parenting-time adjustment should be confirmed against the current administrative rule text at filing time.
- The direct online application URL for Oregon Child Support Program services could not be pinned to a specific working page at drafting time.
Child Support in Oregon: frequently asked questions
What model does Oregon use for child support?+
Oregon uses the income shares model under ORS 25.275 and the state's administrative rules. The guideline combines both parents' gross incomes and applies a statewide schedule to the combined amount. It then divides the resulting support obligation between the parents, based on each parent's income share.
How do I apply for child support services in Oregon?+
Through the Oregon Child Support Program, part of the Department of Justice and the state's IV-D agency. A parent can apply through the program's website for paternity establishment, a new support order, or enforcement of an existing order.
Which court hears child support cases in Oregon?+
Oregon circuit courts hear contested support matters tied to divorce, custody, and paternity cases. The Child Support Program can also establish and modify orders administratively. Circuit court review is available when a party requests a hearing.
How do I modify an Oregon child support order?+
By showing a substantial change in circumstances, including a significant income or parenting time change. File this with the circuit court that issued the order. Or request a periodic administrative review through the Child Support Program, for agency-managed cases.
Does parenting time affect an Oregon child support calculation?+
Yes. Oregon's guideline includes an adjustment based on the actual number of overnights each parent has with the child. The support amount can shift depending on how parenting time is actually divided, not just on each parent's income.
What enforcement tools does Oregon use for unpaid child support?+
The Child Support Program can withhold income, intercept state and federal tax refunds, report arrears to credit bureaus, and pursue license suspension once a parent falls significantly behind. A parent owed support can open a case with the program to start enforcement, regardless of how the original order was obtained.
This page is general information about child support in Oregon, not legal advice for your situation. Laws, fees, and procedures change over time; confirm current details with Oregon's own courts before relying on anything here. Virdix is not a law firm and is not licensed to practice law in Oregon. Virdix does not prepare or file Oregon divorce paperwork. It is not a substitute for an attorney licensed in Oregon.
More Oregon divorce guides
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