Oklahoma Child Support Calculator
Estimate your monthly child support under Oklahoma's Income Shares guidelines (43 O.S. §§118–119) in seconds, then get your exact figure from an Oklahoma City family law attorney.
Estimate your Oklahoma child support
Built on Oklahoma's Income Shares guidelines (43 O.S. §119) and the parenting-time adjustment (§118E). Free and private, with no signup to see your range.
Roughly: every other weekend ≈ 52 nights, alternating weeks ≈ 182. Oklahoma's shared-parenting adjustment starts at 121.
A Hopson Legal family law attorney reviews every estimate personally. No obligation.
This tool provides a general estimate based on Oklahoma's Income Shares guidelines (43 O.S. §§118–119) and the information you enter. It uses your stated gross monthly income; an actual case adjusts gross income under §118B and can add health-insurance, childcare, and other costs under §118F. This is not legal advice and does not create an attorney-client relationship. Speak with a Hopson Legal attorney for guidance specific to your situation.
This page explains general Oklahoma law and the arithmetic of the statewide guideline. It is not legal advice, does not account for the facts of any particular case, and does not create an attorney-client relationship.
The model Oklahoma actually uses
Oklahoma does not set support by a flat percentage of one parent's pay. It uses the Income Shares model in 43 O.S. §§118–119, which starts from the idea that a child should receive the same proportion of parental income they would have if the parents shared a household. Three steps drive the result:
| 1. Combined income | Both parents' gross monthly incomes are added together to a single combined figure. |
| 2. Base obligation | That combined figure and the number of children are looked up on the §119 schedule to find the total monthly base support amount. |
| 3. Each parent's share | The base is split between the parents in proportion to their share of the combined income. The parent with fewer overnights generally pays their share to the other. |
A worked example, start to finish
Take two parents with two children. One earns $5,000 a month gross, the other $3,000. The higher earner has the children about 100 nights a year (under the shared-parenting threshold).
| Combined income | $5,000 + $3,000 = $8,000 |
| Base obligation (§119, 2 children) | The $8,000 row for two children on the schedule is about $1,303 per month |
| Higher earner's income share | $5,000 ÷ $8,000 = 62.5% |
| Their guideline share | 62.5% × $1,303 ≈ $814 per month |
Because that parent has fewer overnights, they are the paying parent, and their income share of the base is what the guideline presumes. The other parent's share is presumed spent directly on the children in their care.
How parenting time lowers the number
Oklahoma rewards shared parenting once a threshold is crossed. Under 43 O.S. §118E, if the noncustodial parent is granted 121 or more overnights a year, a parenting-time adjustment applies. The combined base is multiplied by a factor set by the overnight count, then each parent's share is offset against the time the child spends with the other parent:
| Noncustodial overnights per year | Adjustment factor |
|---|---|
| 121 to 131 | 2 |
| 132 to 143 | 1.75 |
| 144 or more | 1.5 |
The two shares are then offset: the parent who owes more pays the difference, and the other is set to zero. Because both incomes and overnights feed the result, a change in either one can move the figure, which is why parenting schedules are so often negotiated alongside support. A parent with more than 205 overnights is not ordered to pay, and the adjustment can never raise support above the amount that would apply without it.
Gross income is broader than your paycheck
The schedule runs on gross monthly income as defined by 43 O.S. §118B, which reaches wages, salary, commissions, bonuses, self-employment income, and many other sources, then allows limited adjustments such as support already paid for other children. The calculator above uses the gross figure you enter directly; a court would rebuild it from pay records and tax returns.
Where the guideline figure and a final order diverge
The guideline number is a presumption, not a ceiling. Two things account for most of the gap between a calculated figure and a signed order.
Add-ons. Under §118F and related sections, the cost of the children's health-insurance coverage, work-related childcare, and certain medical expenses are added on top of the base and split between the parents in proportion to income. None of these are inside the base figure the calculator produces.
Deviation. A court can order an amount different from the guideline where following it would be unjust or inappropriate in the particular case, but any departure has to be justified on the record.
When a support order can change
A guideline figure is a snapshot of the inputs on the day it is run. Because the formula is driven by income and overnights, a material change in either can justify revisiting the order. Oklahoma allows a parent to request a modification of an existing support order when circumstances have changed materially. Running the calculator with the old inputs and again with the new ones is a quick way to see whether a change is large enough to be worth pursuing. Until a court modifies the order, the existing order stands and arrears can accrue on it, so an informal agreement between parents does not by itself change what is legally owed.
Where this applies
The §119 schedule is statewide, so the same numbers apply in every Oklahoma county. Hopson Legal handles child support and family law matters across the Oklahoma City metro:
- Family law in Oklahoma City
- Family law in Midwest City
- Family law in Del City
- Family law in The Village
- Family law in Bethany
Support rarely stands alone. It is usually decided alongside custody and the parenting schedule that sets the overnights, and in a divorce it sits beside property division and, in some cases, spousal support (estimate it with our Oklahoma alimony calculator). Where one parent's income is variable, self-employed, or tied to a business, establishing the gross income figure itself becomes the contested question.
Oklahoma child support: common questions
What model does Oklahoma use for child support?
The Income Shares model in 43 O.S. §§118–119. Both parents' gross incomes are combined, a base obligation is read from the statewide schedule, and it is split in proportion to income. Every county uses the same schedule.
Does Oklahoma use gross or net income?
Gross monthly income, as defined by §118B, with limited adjustments. It is broader than take-home pay and reaches most income sources.
Does more parenting time reduce child support?
It can. Once the noncustodial parent has 121 or more overnights a year, the §118E parenting-time adjustment applies and can substantially lower the obligation. A parent with more than 205 overnights is not ordered to pay.
Does 50/50 custody mean no child support?
Not necessarily. With equal time but unequal incomes, the higher earner usually still pays something, because the guideline is driven by income as well as overnights. Only when incomes and time are both roughly equal does the offset approach zero.
How is support calculated for more than one child?
The schedule lists a higher base obligation for each additional child, and that combined base is what gets split and adjusted. The increase per child gets smaller as the number of children rises.
How accurate is this calculator?
It implements the §119 schedule and the §118E parenting-time adjustment faithfully. Its accuracy for your case depends on your inputs, particularly whether your gross figure and overnight count match your real situation, and it does not apply §118F add-ons or any deviation. For a precise figure, speak with a Hopson Legal attorney.