Okla. Stat. » Title 43 — MARRIAGE AND FAMILY
Oklahoma Statutes

Okla. Stat. tit. 43, § 118D (2026)

Computation of child support as percentage of parents'

✓ current as of July 2026
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combined gross income - Prospective adjustment - Transportation expenses - Support order summary form. A. All child support shall be computed as a percentage of the combined gross income of both parents. The Child Support Guideline Schedule as provided in Section 119 of Title 43 of the Oklahoma Statutes shall be used for such computation. The child support obligation of each parent shall be computed. The share of the obligor shall be paid monthly to the obligee and shall be due on a specific date. B. In cases in which one parent has sole physical custody, the adjusted monthly gross income of both parents shall be added together and the Child Support Guideline Schedule consulted for the total combined base monthly obligation for child support. C. After the total combined child support is determined, the percentage share of each parent shall be allocated by computing the percentage contribution of each parent to the combined adjusted gross income and allocating that same percentage to the child support obligation to determine the base child support obligation of each parent. D. 1. In cases of split physical custody, where each parent is awarded physical custody of at least one of the children for whom the parents are responsible, the child support obligation for each parent shall be calculated by application of the child support guidelines for each custodial arrangement. 2. The parent with the larger child support obligation shall pay the difference between the two amounts to the parent with the smaller child support obligation. E. Child support shall be computed as set forth in subsections A through D of this section in every case, regardless of whether the custodial arrangement is designated as sole custody or joint custody. F. The court, to the extent reasonably possible, shall make provision in an order for prospective adjustment of support to address any foreseen changes including, but not limited to, changes in medical insurance, child care expenses, medical expenses, extraordinary costs, and the satisfaction of jointly acquired debt of the parents used as a deduction from the gross income of a parent. G. Transportation expenses of a child between the homes of the parents may be divided between the parents in proportion to their adjusted gross income, so long as the payment of such expenses does not significantly reduce the ability of the custodial parent to provide for the basic needs of the child. H. The social security numbers of both parents and the children who are the subject of a paternity or child support order shall be

included in the support order summary form provided for in Section 120 of Title 43 of the Oklahoma Statutes. I. A completed support order summary form shall be presented to the judge with all paternity and child support orders where the Department of Human Services is not a necessary party pursuant to Section 112 of Title 43 of the Oklahoma Statutes. No such order shall be signed by the judge without presentation of the form. Added by Laws 2008, c. 407, § 5, eff. July 1, 2009.

Notes of Decisions
Cited in 4 cases (2 in the last 5 years), 2011–2021 · leading case: In Re the Marriage of Williamson, 2022 OK CIV APP 14 (Okla. Civ. App. 2021).
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In Re the Marriage of Williamson, 2022 OK CIV APP 14 (Okla. Civ. App. 2021). · cites it 2× “2018, § 118F 43 O.S.2011, § 118D Transportation expenses of a child between the homes of the parents may be divided between the parents in proportion to their adjusted gross income, so long as the payment of such expenses does not significantly reduce the ability of the…”
Marriage of Kingery v. Kingery, 270 P.3d 192 (Okla. Civ. App. 2011). “6 An apparent consequence of the failure to use the child support computation form is that the order on appeal also does not reflect any of the parenting time adjustments provided for in 43 O.S.Supp.2009 § 118D. It does not address how such adjustments may or may not have been…”
Swiney v. Villanueva, 2021 OK CIV APP 37 (Okla. Civ. App. 2021). · cites it 2× “Title 43 O.S. §118D states: G. Transportation expenses of a child between the homes of the parents may be divided between the parents in proportion to their adjusted gross income, so long as the payment of such expenses does not significantly reduce the ability of the custodial…”
In the Interest of the Child. of Knight, 2014 OK CIV APP 2 (Okla. Civ. App. 2013). · cites it 3× “43 O.S. 2011 §118D(A) and (C). Gross income includes both earned income and passive income.”
Okla. Stat. tit. 43, § 118D(A): 1 case
In the Interest of the Child. of Knight, 2014 OK CIV APP 2 (Okla. Civ. App. 2013). “43 O.S. 2011 §118D(A) and (C). Gross income includes both earned income and passive income.”
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