How Oklahoma Calculates Child Support
Oklahoma uses the Income Shares model to determine child support obligations. This page explains the guidelines, formula, and key factors.
Model Type
Income Shares
Oklahoma computes support under 43 O.S. § 118D by combining both parents' adjusted gross incomes, locating the total obligation on the statutory schedule (43 O.S. § 119), and dividing it by each parent's income share. A parenting-time adjustment applies once the non-custodial parent's overnights cross a statutory threshold (43 O.S. § 118E).
Income Basis & Definitions
gross
Selects the base-support amount from the schedule/table.
Source: 43 O.S. §118 child support guidelines schedule/worksheetsParent A gross income used by guideline.
Source: Income definition / worksheet income line(s)Parent B gross income used by guideline.
Source: Income definition / worksheet income line(s)Parenting Time Handling
Calculator selects custody model/worksheet (sole/shared/split/joint) and applies corresponding formula.
Source: Custody/worksheet applicability and parenting-time adjustmentShared parenting time adjustment uses parenting time/overnights/days input as reflected in official computation guidance.
Source: Parenting time input / shared parenting adjustmentDeductions & Adjustments
Adjustments/credits for other dependents or court-ordered support for other children (state-specific).
Source: Other children / preexisting support adjustmentIf the guideline adjusts for spousal support (paid/received), capture amount.
Source: Spousal support (alimony/maintenance) adjustmentAdd-Ons & Allocation
Work-related childcare costs added and allocated between parents.
Source: Childcare add-onChild’s health insurance premium share and uninsured/unreimbursed medical allocation.
Source: Medical support (insurance + uninsured medical)Caps, Minimums & Deviations
If guideline table caps at an income level, above-cap support is typically discretionary with findings.
Source: Maximum schedule income / above-cap handlingDeviation allowed for enumerated factors; requires findings (court-determined).
Source: Deviation factors / findings