Oregon Child Support
Calculator (2026)
Oregon uses an income shares model with the official support scale (OAR 137-050-0725, eff. July 1, 2026) covering combined adjusted income from $0 to $30,000/month in $50 brackets. Parenting time earns a CONTINUOUS credit starting from the first overnight (OAR 137-050-0730 formula) — there is no overnight-threshold cliff or 1.5x multiplier in Oregon.
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How Child Support Is Calculated in Oregon
Oregon calculates child support using the Income shares model with the official Oregon scale established under ORS 25.275; OAR 137-050-0700 to -0765. This is a statutory formula that leaves limited room for judicial discretion on the base calculation amount, ensuring consistency and predictability for families across the state.
The Formula
Basic obligation from the official scale. Each parent's share = pro rata by adjusted income, with the continuous parenting-time credit applied; the parent with the greater net obligation pays their own net amount.
The calculation begins with determining each parent's net disposable income, which includes virtually all sources of income minus taxes, mandatory payroll deductions, and certain hardship deductions. The court then applies the statutory formula using the time each parent has primary physical responsibility for the children and the applicable income allocation brackets.
Beyond the base formula amount, Oregonrequires additional contributions for mandatory add-on expenses. These typically include childcare costs necessary for the custodial parent's employment or education, uninsured healthcare expenses for the children, and in some cases, educational and travel costs. These add-ons are split between parents in proportion to their respective incomes.
Primary statute: ORS 25.275; OAR 137-050-0700 to -0765
Key Child Support Rules in Oregon
Official scale: $0–$30,000/month combined adjusted income ($50 brackets; flat $50 row below $1,000; income between rows uses the lower row).
Parenting time credit: continuous formula from the first overnight (OAR 137-050-0730) — no cliff threshold.
Self-support reserve: $1,729/month (eff. July 1, 2026).
Minimum order: $100/month total (not per child).
Adjusted income deducts own health insurance premium, spousal support paid, and a non-joint-child deduction; the obligor is the parent with the greater net obligation.
What Makes Oregon Child Support Unique
Oregon is a pure no-fault state — irreconcilable differences is the sole ground.
No mandatory waiting period — one of few states with no waiting period.
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Oregon Divorce Procedure at a Glance
Residency Requirement
6 months residency required only if the marriage was not solemnized in Oregon (ORS 107.075)
Mandatory Waiting Period
No mandatory waiting period
No-Fault Ground
Irreconcilable differences (pure no-fault — ORS 107.025)
State Income Tax
Progressive 4.75–9.9% (among the highest in the US)
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Frequently Asked Questions About Oregon Child Support
How is child support calculated in Oregon?
Oregon uses the Income shares model with the official Oregon scale under ORS 25.275; OAR 137-050-0700 to -0765. Oregon uses an income shares model with the official support scale (OAR 137-050-0725, eff. July 1, 2026) covering combined adjusted income from $0 to $30,000/month in $50 brackets. Parenting time earns a CONTINUOUS credit starting from the first overnight (OAR 137-050-0730 formula) — there is no overnight-threshold cliff or 1.5x multiplier in Oregon.
What factors affect Oregon child support amounts?
Key factors include both parents' income, the number of children, custodial time share, mandatory add-on expenses (childcare, health insurance), and any applicable deductions. Official scale: $0–$30,000/month combined adjusted income ($50 brackets; flat $50 row below $1,000; income between rows uses the lower row).
Can Oregon child support be modified after the divorce?
Yes. Either parent can request a modification if there has been a material change in circumstances, such as a significant change in income, custody arrangements, or the needs of the child. The court will recalculate support using the same statutory formula.
What is the Oregon child support formula?
Basic obligation from the official scale. Each parent's share = pro rata by adjusted income, with the continuous parenting-time credit applied; the parent with the greater net obligation pays their own net amount.
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Start My Free OregonEstimate →This tool provides educational estimates based on Oregon family law and does not constitute legal advice. Child support calculations are approximations of the statutory formula and may differ from court-ordered amounts. Consult a licensed Oregon family law attorney before making decisions. Primary statute: ORS 25.275; OAR 137-050-0700 to -0765.