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Oklahoma Child Support Calculator & Guidelines (2026)

Estimate Oklahoma child support under 43 O.S. § 118 — Income Shares model, current caps and percentages, with a step-by-step worked example.

This state uses a worksheet/table-based guideline that cannot be fully reproduced in a simplified tool. The range above is an approximation — use the official state calculator for the guideline figure. Official state calculator →

Estimate Your Child Support

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Oklahoma Child Support Rules at a Glance

Guideline model Income Shares
Income basis Gross (pre-tax) income
How it works Both parents’ incomes are combined, a basic obligation is taken from the state’s official schedule, and each parent pays in proportion to their share of combined income.
Statute / rule 43 O.S. § 118
Parameters verified pending full verification (model and statute confirmed)

Worked Example: $5,000 + $3,000 Income, Two Children

  1. Paying parent’s monthly income: $5,000 - other parent’s: $3,000 - two children, primary custody.
  2. Simplified income shares estimate: combined income $8,000 x 24% (two children) = $1,920 basic obligation.
  3. Paying parent’s share: 62.5% of $1,920 = $1,200 - shown as a range of $1,020-$1,380 to reflect state schedule differences.
  4. For the exact figure use the official state calculator linked below - this state’s guideline uses its own obligation schedule.

Result: $1,020 - $1,380 per month (simplified range)

Oklahoma Child Support FAQ

How is child support calculated in Oklahoma?

Oklahoma uses the income shares model under 43 O.S. § 118: both parents’ incomes are combined, a basic obligation is determined, and each parent is responsible for their proportional share. The paying parent’s share becomes the support order.

Does Oklahoma use gross or net income for child support?

Oklahoma calculates support on gross (pre-tax) income as defined in 43 O.S. § 118.

Can a Oklahoma court order more or less than the guideline amount?

Yes. The guideline amount under 43 O.S. § 118 is presumptive, not absolute - courts may deviate with written findings for factors like extraordinary medical or educational needs, other children supported, or very high income beyond the guideline range.

How do I apply for or modify child support in Oklahoma?

Apply through the Oklahoma child support agency or the family court in your county. Existing orders can be modified on a substantial change in circumstances - typically a significant income change, job loss, or a change in custody. The official calculator/worksheet is linked on this page (oklahoma.gov).

Official Oklahoma Resources

Related Calculators & States

About This Estimate

Estimate only — not legal advice. Based on Oklahoma guidelines (43 O.S. § 118). Courts may deviate. For an official figure use the official Oklahoma calculator.