Oklahoma Child Support Calculator

Estimate Oklahoma child support for 2026 using the Income Shares guideline model under 43 O.S. §§ 118-118I. Enter both parents' incomes and the parenting-time split to see what you may owe or receive.

Oklahoma follows the Income Shares model under 43 O.S. §§ 118-118I. The court combines both parents' monthly gross incomes, looks up the basic support obligation on the state's guideline schedule for that income level and number of children, then prorates the obligation between the parents according to each parent's percentage share of the combined income.

Oklahoma uses a shared-care formula when parents split time more evenly. A parenting-time computation kicks in only when each parent has the child for at least 121 overnights per year. Below that threshold the standard Income Shares math applies, so a parent with occasional weekends usually will not see the obligation adjusted for time. Once both parents cross 121 overnights, the worksheet shifts to the shared parenting calculation, which can lower the paying parent's amount.

The cost of the child's health insurance premium is treated as an add-on to the basic support obligation in Oklahoma, not buried inside the base number. Under 43 O.S. sections 118 to 118I, the parent who pays the premium gets credit for it, and the total is divided between the parents in proportion to each one's share of the combined gross income. The on-page calculator is only an estimate, so confirm the exact premium handling on the official Oklahoma worksheet.

Work-related child care and daycare costs are also added to the basic obligation in Oklahoma rather than absorbed into the guideline base. The reasonable cost of care that lets a parent work or look for work is split between both parents in proportion to their percentage shares of combined gross income. Because daycare bills change often, the figure you enter into the calculator is an estimate, and the controlling number comes from the official Oklahoma child support worksheet.

Oklahoma's guideline amount is presumed correct, but a judge may deviate when applying the guideline would be unjust or not in the child's best interest. The parent asking for a number different from the worksheet result carries the burden of showing why a deviation is justified, and the court must put its reasons in writing. Common grounds include unusual medical needs, special travel costs, or other circumstances under 43 O.S. sections 118 to 118I.

Frequently asked questions

How is child support calculated in Oklahoma?

Oklahoma uses the Income Shares model under 43 O.S. sections 118 to 118I. The court adds both parents' monthly gross incomes together, looks up the basic support obligation on the state's guideline schedule for that combined income and the number of children, then splits that obligation between the parents based on each one's percentage share of the combined income. Add-ons like health insurance and child care are layered on top and divided the same way. Our on-page tool gives you a quick estimate, but the official Oklahoma worksheet and a licensed attorney control the final number.

What is the official Oklahoma child support worksheet, and does it control my case?

Oklahoma has an official guideline worksheet that the court uses to set support, and it is the controlling form, not any quick online estimate. The worksheet walks through both parents' gross incomes, the basic obligation from the state schedule, each parent's percentage share, and add-ons such as health insurance and child care. Oklahoma Child Support Services, part of the Department of Human Services, provides calculation resources to help you complete it. Use our calculator to get a ballpark figure, then rely on the official Oklahoma worksheet and legal advice for the amount a judge will actually order.

What counts as income for Oklahoma child support?

Oklahoma starts from gross income from almost any source. Under the guideline, that includes wages, self-employment earnings, commissions, bonuses, severance, pensions, retirement, Social Security, workers' compensation, unemployment benefits, and recurring gifts. Because the state uses gross rather than net income, taxes and most paycheck deductions do not reduce the figure that goes into the calculation. If a parent is self-employed or paid through commissions, expect the court to look closely at the full income picture. The calculator on this page is only an estimate, so the official Oklahoma worksheet and an attorney should confirm what income applies in your case.

How do overnights and 50/50 parenting change the support amount in Oklahoma?

Parenting time only changes the math in Oklahoma once each parent has the child for at least 121 overnights per year. At that point the worksheet switches to a shared parenting computation, which can reduce the paying parent's obligation to reflect the time and costs each parent carries. If one parent has fewer than 121 overnights, the standard Income Shares calculation under 43 O.S. sections 118 to 118I applies and time is not separately adjusted. A true 50/50 split typically triggers the shared-care formula, but the final figure still comes from the official Oklahoma worksheet, not this estimate.

Can income be imputed to an unemployed or underemployed parent in Oklahoma?

Yes. When a parent is voluntarily unemployed or underemployed, an Oklahoma court can impute income, meaning it assigns earning capacity rather than using the parent's actual low or zero income. The judge looks at things like work history, education, skills, and local job opportunities to decide a fair amount. This keeps a parent from dodging support by quitting or taking a smaller paycheck. Because gross income drives the Income Shares calculation, imputed income can meaningfully raise the number. Our calculator cannot predict imputation, so the official Oklahoma worksheet and a licensed attorney should address it for your situation.

When does child support end in Oklahoma?

Oklahoma child support generally ends when the child turns 18. If the child is still attending high school at that point, support can extend until the child finishes or reaches age 20. Support does not automatically stop on its own in every case, so review your order and confirm the correct end date. For a child who is disabled and unable to be self-supporting, continuing support into adulthood may be available. These rules come from 43 O.S. sections 118 to 118I, and a licensed Oklahoma attorney can tell you exactly how termination applies to your order.

How do I modify or enforce an Oklahoma child support order?

To change support, you can file a motion in district court or request a review through Oklahoma Child Support Services. Oklahoma generally allows modification when there is a variance of 20 percent or 25 dollars per month between the existing order and a fresh guideline calculation, or a substantial and continuing change in circumstances. For enforcement, Oklahoma CSS can use immediate income withholding, tax intercept, license suspension, liens, credit reporting, and contempt referrals. The calculator here only estimates a new guideline figure, so confirm any modification or enforcement step with the agency or a licensed attorney.