Calculate child support using Oklahoma's income shares model
Free calculator based on Oklahoma child support guidelines. Income shares model with schedule-based support obligations and parenting time adjustments.
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Oklahoma uses an income shares model under Oklahoma Statutes Title 43, Sections 118-120. Both parents' adjusted gross monthly incomes are combined (capped at $15,000) to determine the Basic Monthly Obligation from the official guideline schedule. Each parent pays their proportionate share based on their income percentage. Oklahoma does NOT deduct taxes from gross income - only court-ordered obligations like marital debt, other child support, and spousal support are deducted. Additional expenses like health insurance, childcare, and extraordinary medical costs are allocated proportionally.
Oklahoma law requires a parenting time adjustment when the noncustodial parent has 121 or more overnights per year (approximately 33% of the year). The adjustment formula is: overnights ÷ 365 × combined base monthly obligation. This adjustment is MANDATORY (not discretionary) and reduces the noncustodial parent's support obligation to account for direct expenses like food, utilities, and transportation during parenting time. The 121-overnight threshold was clarified in November 2015 to eliminate a penalty that existed for parents with 121-143 overnights.
Yes, Oklahoma allocates the child-only portion of health insurance premiums between both parents proportionally based on income. Health insurance is considered "reasonable" if the premium does NOT exceed 5% of the providing parent's gross income. If the premium exceeds 5%, the court may find it unreasonable and order alternative arrangements or cash medical support instead. Only the child's portion of the premium is included - not coverage for the parent or other family members.
Child support in Oklahoma terminates when the child reaches age 18, UNLESS the child is still enrolled full-time in high school. If the child is still in high school at age 18, support continues until graduation or age 20, whichever occurs first. Support may extend indefinitely for children with disabilities who cannot support themselves. Support also terminates if the child marries, joins active military service, or is emancipated by court order. For the last or only child, termination is automatic (clarified in 2022). Oklahoma does NOT require parents to pay for college unless they voluntarily agree in writing.
Yes, Oklahoma child support can be modified if there is a material change in circumstances resulting in a 20% change in the support amount but not less than $30 (per Oklahoma Administrative Code 340:25-5-198.2). Common reasons include significant income changes, changes in parenting time, changes in health insurance costs, or changes in childcare expenses. Modification is effective from the filing date, NOT retroactive. To modify support, you must file a Motion to Modify Child Support with the court and provide current financial information.
Oklahoma caps the combined adjusted gross monthly income at $15,000 for purposes of looking up the Basic Monthly Obligation from the guideline schedule. If the combined income exceeds $15,000, the schedule amount at $15,000 is used as the base, but the court has discretion to order additional support based on the children's actual needs. There is no specific formula for above-cap support - the court considers the children's lifestyle and demonstrated expenses. Parents with high incomes should consult an attorney to ensure appropriate support levels.
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This calculator provides estimates based on Oklahoma state guidelines. Actual court orders may differ based on individual circumstances. Consult with a qualified family law attorney for advice specific to your situation.