Oklahoma uses an income shares model based on both parents’ gross incomes. A basic support obligation is determined from published guidelines. Each parent pays a pro rata share.
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Oklahoma calculates child support using the Income shares model established under 43 O.S. § 118. 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.
Basic obligation from Oklahoma guidelines schedule based on combined gross income and children. Each parent's share = pro rata.
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, Oklahomarequires 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: 43 O.S. § 118
Income shares model using combined gross income.
Published guidelines schedule.
Health insurance and childcare allocated proportionally.
Deviation available for extraordinary circumstances.
Oklahoma is an equitable distribution state — not community property.
Fault is a factor in both property and alimony.
Answer a few questions about your income, custody, and children. Get your personalized estimate.
Residency Requirement
6 months residency (43 O.S. § 101)
Mandatory Waiting Period
10 days (no minor children) / 90 days (with minor children)
No-Fault Ground
Incompatibility
State Income Tax
Progressive 0.25–4.75%
Oklahoma uses the Income shares model under 43 O.S. § 118. Oklahoma uses an income shares model based on both parents’ gross incomes. A basic support obligation is determined from published guidelines. Each parent pays a pro rata share.
Key factors include both parents' income, the number of children, custodial time share, mandatory add-on expenses (childcare, health insurance), and any applicable deductions. Income shares model using combined gross income.
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.
Basic obligation from Oklahoma guidelines schedule based on combined gross income and children. Each parent's share = pro rata.
Get a personalized child support calculation based on Oklahoma's actual statutory formula.
Start My Free OklahomaEstimate →This tool provides educational estimates based on Oklahoma 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 Oklahoma family law attorney before making decisions. Primary statute: 43 O.S. § 118.