Arizona uses an income shares model with a published guidelines schedule from the Arizona Supreme Court. Combined income ranges from $1,000 to $30,000/month. A parenting time adjustment applies when the non-custodial parent has 92+ days.
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Arizona calculates child support using the Income shares model with Arizona Supreme Court Guidelines schedule established under A.R.S. § 25-320. 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.
Basic obligation from Arizona Supreme Court Guidelines schedule based on combined income and children. Parenting time adjustment for 92+ days.
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, Arizonarequires 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: A.R.S. § 25-320
Combined income schedule: $1,000–$30,000/month.
92+ days parenting time = downward adjustment for the non-custodial parent.
Approximate percentages: 1 child = 16%, 2 = 24%, 3 = 28%, 4 = 32%, 5+ = 35%.
Minimum wage presumption: $15.15/hour (2026).
Health insurance and childcare added, split proportionally.
Arizona Supreme Court publishes and periodically updates the guidelines schedule.
ASRS (Arizona State Retirement System) requires specific division orders.
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Residency Requirement
90-day residency requirement
Mandatory Waiting Period
60-day waiting period after service before finalization
No-Fault Ground
Irretrievably broken ("without regard to marital misconduct")
State Income Tax
Flat 2.5% (2023 Prop 211 reform)
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Arizona uses the Income shares model with Arizona Supreme Court Guidelines schedule under A.R.S. § 25-320. Arizona uses an income shares model with a published guidelines schedule from the Arizona Supreme Court. Combined income ranges from $1,000 to $30,000/month. A parenting time adjustment applies when the non-custodial parent has 92+ days.
Key factors include both parents' income, the number of children, custodial time share, mandatory add-on expenses (childcare, health insurance), and any applicable deductions. Combined income schedule: $1,000–$30,000/month.
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.
Basic obligation from Arizona Supreme Court Guidelines schedule based on combined income and children. Parenting time adjustment for 92+ days.
Get a personalized child support calculation based on Arizona's actual statutory formula.
Start My Free ArizonaEstimate →This tool provides educational estimates based on Arizona 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 Arizona family law attorney before making decisions. Primary statute: A.R.S. § 25-320.