How Utah Calculates Child Support
Utah uses the Income Shares model for child support. The governing law is Utah Code Section 78B-12-201, along with the Utah Child Support Guidelines. Utah uses gross income as the basis for its calculation and combines both parents' incomes to determine the total obligation. Each parent contributes their proportional share.
Utah has a well-defined threshold for joint physical custody that triggers a distinct calculation. When each parent has at least 111 overnights per year, approximately 30.4 percent of the year, Utah applies its joint physical custody formula rather than the standard sole custody calculation.
The Utah Child Support Formula
Utah's calculation follows four steps for sole custody situations.
Step one is determining each parent's monthly gross income. Step two is combining both gross incomes to produce the combined monthly gross income. Step three is finding the Base Child Support Award from Utah's schedule using the combined income and number of children. Step four is calculating each parent's income share percentage and applying it to the obligation.
A practical example: Parent A earns $5,000 per month. Parent B earns $2,500 per month. Combined income is $7,500. Parent A's income share is 66.7 percent. If Utah's schedule sets the Base Child Support Award at $1,300 for two children at $7,500 combined income, Parent A's base obligation is $867 per month.
For joint physical custody situations, where each parent has at least 111 overnights per year, Utah uses a more complex formula that accounts for both parents' direct spending during their respective custody time and adjusts the obligation accordingly.
What Counts as Income in Utah
Utah uses a broad income definition. Courts include wages, salaries, commissions, bonuses, overtime, self-employment income, rental income, pension and retirement distributions, Social Security benefits, SSDI payments, unemployment compensation, workers' compensation, and income from any other regular source.
Courts can impute income to a parent who is voluntarily unemployed or underemployed. Utah courts evaluate work history, education, skills, and the local job market when setting an imputed income level.
Utah allows deductions from gross income before combining incomes: court-ordered child support currently being paid for children from other relationships. This deduction reduces each parent's adjusted gross income before the proportional shares are calculated.
Utah excludes needs-based public assistance from the income calculation.
Step-by-Step: How to Use This Calculator
Step 1. Get your gross monthly income. Include wages, self-employment income, rental income, and any other regular source. Gross means before taxes and before deductions.
Step 2. Subtract existing court-ordered child support payments you are making for children from other relationships.
Step 3. Estimate the other parent's adjusted gross monthly income using the same method.
Step 4. Count your actual overnights per year. Determine whether you have 111 or more overnights, Utah's joint physical custody threshold at approximately 30.4 percent. If your overnight count is near 111, count carefully. Enter your percentage by dividing overnights by 365.
Step 5. Enter the number of children covered by this order.
Step 6. Add healthcare costs. Enter the monthly premium for the children's health insurance.
Step 7. Add childcare costs. Enter monthly work-related childcare expenses.
Step 8. Review the breakdown and confirm which formula was applied (sole custody or joint physical custody) based on your overnight count.
Parenting Time Adjustments in Utah
Below 111 overnights per year, Utah applies a sliding scale parenting time credit that reduces the paying parent's obligation as overnights increase past the standard visitation level.
At 111 overnights and above, Utah's joint physical custody threshold, the formula switches to the joint physical custody calculation. Both parents' obligations are calculated based on income shares and custody percentages. The parent with the higher net obligation pays the difference.
At equal parenting time with equal incomes, the joint physical custody formula produces a near-zero net obligation. With meaningful income differences, a net payment still flows from the higher earner to the lower earner even at equal time.
The 111-overnight threshold is Utah's key dividing line. A few overnights in either direction near that threshold can determine whether the sole custody or joint physical custody formula applies, and those two calculations can produce meaningfully different results.
Add-On Expenses in Utah
Utah adds healthcare premiums and work-related childcare costs to the base obligation, allocated proportionally by income share. Courts may also address extraordinary medical expenses and educational costs on a case-by-case basis.
Reading Your Results
The results display shows each parent's adjusted gross income, combined gross income, the Base Child Support Award from Utah's schedule, which formula was applied, income share percentages, the parenting time adjustment, add-on costs, and the final monthly obligation.
Confirm which formula was applied. If your overnight count is near 111, the difference of a few nights determines the entire calculation method.
After You Get Your Estimate
Utah courts follow the guidelines in all standard cases. Deviation is allowed when the guideline amount would be unjust, inappropriate, or not in the child's best interests. Courts document deviations with specific written findings.
Modification in Utah requires a substantial change in circumstances. A 15 percent or more change in the calculated obligation is a commonly applied threshold. Income changes, shifts in overnights past the 111-night joint physical custody threshold, and changes in the children's needs are the most common grounds.
A licensed Utah family law attorney can review your calculation and confirm which formula applies. Many offer a free initial consultation.