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State Guide · Oregon
Child Support in Oregon: How It's Calculated, Modified & Enforced
A plain-English guide to Oregon child support — the guideline model, how the number is computed, the modification and enforcement process, and where to find the official worksheet.
Direct answer
The guidelines presume every parent can pay at least $100/month (OAR 137-050-0755).
Oregon uses the Income Shares Model on combined ADJUSTED gross monthly income, with the basic obligation read from the Scale of Basic Support Obligations (OAR 137-050-0725). The scale caps at $30,000/month combined; obligations for more than ten children equal the ten-child amount. A self-support reserve applies, the minimum order is $100/month, and parenting-time credits reduce the obligation based on overnights.
Open the Oregon child support calculator to see your own number under the current guideline: Oregon calculator.
How a support order is established in Oregon
Determine each parent\'s gross income from all sources.
Subtract allowed deductions (union dues, own health insurance, spousal support paid, non-joint children) to get adjusted income.
Combine both adjusted incomes.
Look up the basic support obligation on the Scale of Basic Support Obligations by combined income and number of children.
Apply parenting-time credits based on overnights and add the child\'s health insurance and childcare.
Split the obligation by each parent\'s percentage share of adjusted income.
Worked examples
Illustrative example - combined $5,000/mo, 1 child, 60% obligor — Combined adjusted gross monthly income $5,000; one child. Scale basic obligation ~$664/month. Obligor earns 60%, so pays 60% x $664 = about $398/month. For two children the scale amount is ~$953, so the obligor pays about $572/month (before credits/add-ons). Oregon\'s scale gives the total base obligation; the paying parent covers only their income-share percentage.
Modifying or enforcing an order
Orders in Oregon can be modified when there is a substantial change in income, custody, or circumstances. Use the modification eligibility check and the cross-state comparison tool to see how a move would change the outcome. Enforcement runs through the state agency and can include income withholding and contempt proceedings.
Official sources
Oregon DOJ - Child Support (Guidelines) — https://www.doj.state.or.us/child-support/
OAR 137-050-0725 (Basic Support Obligation) — https://oregon.public.law/rules/oar_137-050-0725
What is Oregon\'s minimum child support?
The guidelines presume every parent can pay at least $100/month (OAR 137-050-0755).
Is there a cap on Oregon\'s scale?
Yes. Combined adjusted income above $30,000/month uses the $30,000 obligation; more than ten children uses the ten-child amount.
Oregon child support calculator
Estimate for Oregon
Oregon uses the Income Shares model.
Enter the paying parent’s gross (pre-tax) monthly income.
Oregon Child Support Worksheet — Planning Estimate
Generated September 22, 2026 · Model: Income Shares · Income basis: gross · Statute: Or. Rev. Stat. § 25.275
This is an informal planning estimate, not a court worksheet and not legal advice. Confirm the current guideline with the state child-support agency or a licensed family-law attorney.
Estimated monthly support$676.67per month
Official schedule: Oregon Administrative Rules 137-050-0725, Scale of Basic Support Obligations (combined adjusted GROSS monthly income). Representative figures below are published points from the state scale (Oregon DOJ). (2024)
Annual estimate$8,120.04
Effective rate13.5%
MethodIncome Shares: combined income → official Oregon schedule → split by income share (+ add-ons, parenting-time credit)
View calculation breakdown
Combined parental income
$9,000
Total basic obligation (schedule)
$1,218
Obligor income share
55.6%
Obligor basic obligation
$677
Estimated monthly support
$677
How the basic obligation splits between parents
56%
44%
Paying parent: $677 Other parent: $541
Each parent pays their proportional share of the combined basic obligation.
Estimated monthly support by number of children
At the incomes you entered, for 2 children.
This article is general education, not legal or tax advice. For your exact number, open your state calculator.
Not legal or financial advice. This estimate follows the state’s statutory guideline formula but cannot capture every factor a court considers (health insurance, childcare, prior orders, deviations, imputed income).
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