Income shares on combined GROSS monthly income. Table-based. Low-income threshold $1,951/mo (2023). Recodified Sept 2024 from Title 78B to Title 81.
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Utah calculates child support using the Income shares (combined gross) established under Utah Code §81-6-304 (formerly §78B-12-301). This is a statutory formula that leaves limited room for judicial discretion on the base calculation amount, ensuring consistency and predictability for families across the state.
Combined gross → schedule percentage → prorated by income share.
The calculation begins with determining each parent's net disposable income, which includes virtually all sources of income minus taxes, mandatory payroll deductions, and certain hardship deductions. The court then applies the statutory formula using the time each parent has primary physical responsibility for the children and the applicable income allocation brackets.
Beyond the base formula amount, Utahrequires additional contributions for mandatory add-on expenses. These typically include childcare costs necessary for the custodial parent's employment or education, uninsured healthcare expenses for the children, and in some cases, educational and travel costs. These add-ons are split between parents in proportion to their respective incomes.
Primary statute: Utah Code §81-6-304 (formerly §78B-12-301)
Income shares on combined GROSS income.
Low-income threshold $1,951/mo.
Shared custody offset for 111+ overnights.
Recodified: §78B-12-301 → §81-6-304 (Sept 2024).
Recodified Sept 2024 (Title 78B → Title 81).
Low-income threshold raised to $1,951 (2023).
Flat 4.5% state income tax.
Answer a few questions about your income, custody, and children. Get your personalized estimate.
Residency Requirement
90 days in county
Mandatory Waiting Period
90-day mandatory waiting period
No-Fault Ground
Irreconcilable differences
State Income Tax
Flat 4.5%.
Utah uses the Income shares (combined gross) under Utah Code §81-6-304 (formerly §78B-12-301). Income shares on combined GROSS monthly income. Table-based. Low-income threshold $1,951/mo (2023). Recodified Sept 2024 from Title 78B to Title 81.
Key factors include both parents' income, the number of children, custodial time share, mandatory add-on expenses (childcare, health insurance), and any applicable deductions. Income shares on combined GROSS income.
Yes. Either parent can request a modification if there has been a material change in circumstances, such as a significant change in income, custody arrangements, or the needs of the child. The court will recalculate support using the same statutory formula.
Combined gross → schedule percentage → prorated by income share.
Get a personalized child support calculation based on Utah's actual statutory formula.
Start My Free UtahEstimate →This tool provides educational estimates based on Utah family law and does not constitute legal advice. Child support calculations are approximations of the statutory formula and may differ from court-ordered amounts. Consult a licensed Utah family law attorney before making decisions. Primary statute: Utah Code §81-6-304 (formerly §78B-12-301).