The Arizona Child Support Guidelines are the rules used to calculate presumptive child support in Arizona. Arizona uses an Income Shares model meaning both parents' gross incomes are combined to estimate what the family would have spent on the child if the parents had stayed together. Each parent then contributes to that estimated amount in proportion to their respective incomes.

The guidelines produce a presumptive amount. Courts can deviate from the guidelines amount if the standard calculation would be inappropriate or unjust in a particular case. Deviation requires written findings.

The guidelines are periodically updated. Confirm you are using the current version before advising any client about child support amounts.