Arizona Child Support Calculator
Estimate Arizona child support with Income Shares principles, parenting-time credits, and mandatory add-ons before you meet with counsel.
Run Your Arizona Scenario
Enter each parent’s monthly income, parenting days, and mandatory add-ons. The tool approximates the Arizona Income Shares formula and applies a parenting-time offset for the paying parent.
Which best describes you?
Arizona Child Support Estimate
Arizona Child Support Guidelines (Income Shares Model)
Need more information
Enter each parent’s monthly gross income and the number of children to generate a guideline estimate.
How Arizona Calculates Child Support
Arizona follows the Income Shares model: both parents’ adjusted incomes are combined, a basic support obligation is located in the statewide schedule, and the obligation is split according to each parent’s income percentage. Parenting time, childcare, and insurance costs modify the core obligation before a final monthly payment is determined.
Key Components
- Adjusted gross income for both parents (spousal support and other child support orders are netted out).
- Basic Child Support Obligation (BCSO) sourced from the statewide schedule.
- Parenting time credit based on annual parenting days.
Mandatory Add-Ons
- Work-related childcare expenses.
- Children’s health, dental, and vision insurance premiums.
- Extraordinary medical costs may be allocated separately.
How the Estimate Is Calculated
- Combine adjusted incomes. Each parent’s gross income is adjusted for spousal support and other court-ordered obligations.
- Determine the base obligation. The combined income is multiplied by a guideline rate to approximate the state schedule.
- Allocate by income share. Each parent owes a percentage equal to their share of the combined income.
- Apply parenting time credit. The paying parent’s share is reduced when overnight parenting time crosses key thresholds.
- Add childcare and insurance. Mandatory add-ons are apportioned and added to the final transfer payment.
Frequently Asked Questions
Does this follow the official Arizona Child Support Guidelines?
The calculator mirrors the Income Shares structure but uses simplified rates. Always confirm final numbers with the official Arizona Supreme Court schedule or your attorney.
How are parenting time credits handled?
The tool applies a proportional credit when the payor exceeds roughly 54 parenting days (15% of the year). Highly customized schedules may require manual adjustments.
Can I include childcare and insurance add-ons?
Yes. Enter the monthly costs for work-related childcare and the marginal cost of the children’s health coverage. The add-ons are prorated by each parent’s income share.
When does support terminate in Arizona?
Support usually ends when the youngest child turns 18, but it can extend through high school graduation or age 19 if the child is still enrolled. The calculator flags this rule in the summary.
Use This Estimate to Prepare for Court or Mediation
Bring the results to your attorney or financial professional. Confirm numbers with the official Arizona schedule before filing pleadings or stipulations.
Recalculate Child SupportThis tool provides an educational estimate. Arizona courts rely on the official statewide schedule and may deviate after reviewing evidence. Consult an Arizona family law attorney for legal advice.