Oregon Child Support Calculator
Estimate your child support obligations in Oregon using the income shares model. Understand how support is calculated, what factors matter, and what to expect. Updated for 2026.
Oregon uses the Income Shares Model under ORS § 25.275 and OAR 137-050-0700 through 137-050-0765. The model calculates support based on both parents' combined income and the number of children. The child is entitled to benefit from the income of both parents to the same extent as if the family unit remained intact. Each parent's share is proportional to their percentage of combined income. The guidelines consider health insurance, childcare costs, extraordinary medical expenses, and parenting time credits.
Official Oregon calculator →Estimate Your Child Support
Interactive Calculator Coming Soon
Our Oregon child support calculator will let you estimate payments based on your income, custody arrangement, and number of children. Sign up to get notified when it launches.
Get Started with Divorce.aiWhat Goes Into the Oregon Calculation?
Income
Both parents' gross income from all sources:
Deductions
Allowable deductions that may reduce gross income:
Adjustments
Additional factors that can adjust the base support amount:
Get your full financial picture
Divorce.ai's income and expense tracker helps you accurately report your finances for the Oregon child support worksheet.
How the Income shares Model Works
Determine Combined Income
Add both parents' adjusted gross income together to get the combined income figure.
Look Up Base Obligation
Using Oregon's guidelines table, find the base child support amount for your combined income and number of children.
Prorate Between Parents
Each parent's share is proportional to their income. If Parent A earns 60% of the combined income, they are responsible for 60% of the obligation.
Apply Adjustments
Add or subtract adjustments for healthcare, childcare, shared parenting time, and extraordinary expenses.
Complete your child support worksheet
Divorce.ai auto-fills the Oregon child support worksheet based on your financial information. Accurate and court-ready.
Modifying Child Support in Oregon
Child support orders are not permanent. You can request a modification when there is a substantial change in circumstances. Common reasons include: