How is child support calculated in Utah?

Utah uses an income-shares model [§ 78B-12-301]. Based on combined adjusted gross income of both parents. The guideline amount represents the presumptive support obligation.

Can child support be modified?

Yes. Either parent can request modification when there is a material change in circumstances [§ 78B-12-301] — a significant change in income, the child's needs, or the custody arrangement. Modifications are not retroactive past the filing date.

What happens if support is not paid?

Utah has multiple enforcement tools including income withholding, property liens, tax refund interception, and contempt of court. Consistent non-payment can result in serious consequences including license suspension and incarceration.

Does overtime count as income for child support?

Yes. Gross income for child support purposes includes regular wages, overtime, bonuses, commissions, and other recurring income [§ 78B-12-301]. Courts evaluate whether overtime is consistent and expected.

When does child support end?

Child support typically continues until the child reaches the age of majority, graduates from high school, or becomes emancipated — whichever occurs later, depending on state law [§ 78B-12-301]. Some orders include provisions for college expenses.

Topic guideUpdated 2026-02-27

Utah Child Support — Calculation & Enforcement

How child support is calculated in Utah — income shares model, guidelines, deviations, and modifications

Child support in Utah is calculated using an income-shares model §78B-12-301. This means both parents' incomes are considered to determine the total support obligation, which is then divided proportionally based on each parent's share of the combined income.

💡Child support is a right of the child, not the parent. Courts will not approve agreements that waive or unreasonably reduce child support, and parties generally cannot bargain away support in exchange for other concessions.

How support is calculated

Based on combined adjusted gross income of both parents
Utah child support tables set presumptive amount
Applies to children under 18 or through high school

Key factors in the calculation

Gross income of both parents (wages, salary, commissions, bonuses, self-employment income)
Number of children requiring support
Cost of health insurance for the children
Work-related childcare expenses
Existing support obligations for other children
Parenting time allocation (overnights with each parent)

Income withholding

Utah law requires or allows income withholding for child support. This means support payments can be deducted directly from the paying parent's paycheck before they receive it, ensuring consistent and timely payment.

Deviating from the guidelines

Courts may deviate from the guideline amount if applying the standard formula would be unjust or inappropriate. Common reasons for deviation include:

Extraordinary medical expenses for the child
Special educational needs
Travel costs for long-distance visitation
Significant disparity in parents' living costs
Shared or split custody arrangements that differ from the assumed standard

✓Deviations require specific written findings by the court explaining why the guideline amount is inappropriate.

Modifying child support

Child support can be modified when there is a Material change in circumstances — a significant change in either parent's income, the child's needs, or the custody arrangement. Common triggers include:

Job loss, promotion, or significant income change
Child starting or finishing school
Change in custody or parenting time
Change in health insurance availability or cost

⚠Modifications are not automatic and are not retroactive to the date circumstances changed. Support can only be modified from the date a motion is filed. If your income changes, file promptly.

Prepare for Your Consultation

Quick checklist (Family Law)

Bring what you have — missing items can be filled in later.

Current custody / support

orders (if any)

Key dates

and communications

Income / expense basics

(if support involved)

General preparation tips only. Procedures vary by court and issues.

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