Arizona Child Support Deviation Factors and Burden of Proof
Need the burden of proof for a deviation in child support in Arizona? This guide explains who must prove the guideline amount is unjust, which A.R.S. § 25-320(D) factors matter, and what evidence courts expect.
When Arizona Child Support Can Be Changed from the Guideline
Arizona child support guidelines provide a presumptively correct support amount based on the income shares model. However, A.R.S. § 25-320(D) allows courts to deviate from the guideline amount if applying the standard formula would be "inappropriate or unjust" in a particular case.
Deviation means the court orders support different from the guideline calculation—either higher (upward deviation) or lower (downward deviation). The statute lists specific factors courts may consider when deciding whether to deviate. The party requesting deviation bears the burden of proving that guidelines produce an unjust result.
Courts presume the guideline amount is correct. Overcoming this presumption requires clear and convincing evidence that one or more statutory factors justify departure from guidelines and that the proposed deviation serves the child's best interest.
Arizona Child Support Deviation Factors Judges Review
A.R.S. § 25-320(D) lists the following factors courts may consider when evaluating deviation requests:
Financial Resources and Needs
Financial resources and needs of both children and parents
Examples:
- Parent with substantial assets or investment income beyond regular earnings
- Child with special medical or educational needs requiring extraordinary expenses
- Parent with significant debt obligations affecting ability to pay
Standard of Living
Standard of living the child would have enjoyed if parents had not divorced
Examples:
- High-income family accustomed to private schools, travel, luxury lifestyle
- Children attending private school or specialized programs before divorce
- Family with established patterns of high spending on children
Physical and Emotional Condition
Physical and emotional condition of the child and their educational needs
Examples:
- Child with chronic illness, disability, or special medical needs
- Child in therapy or receiving mental health treatment
- Child with learning disabilities requiring specialized education
Financial Resources of Child
Financial resources and earning ability of the child
Examples:
- Child with trust fund, inheritance, or significant savings
- Older child with part-time job or earned income
- Child receiving Social Security or other government benefits
Earning Ability of Parents
Financial resources and earning ability of the parents
Examples:
- Parent voluntarily underemployed or refusing to seek appropriate employment
- Parent with advanced degree or specialized skills not being fully utilized
- Parent with potential for significantly higher income but choosing lower-paying work
Age of Child
Age of the child and appropriateness of the child working
Examples:
- Teenager capable of part-time employment to contribute to expenses
- Young child requiring more intensive childcare and supervision
- College-age child approaching emancipation
Excessive or Unusual Expenses
Excessive or unusual expenses incurred by either parent
Examples:
- Parent with mortgage on expensive home acquired during marriage
- Parent supporting other dependents (elderly parents, disabled family members)
- Parent with extraordinary travel costs for employment or visitation
Income from Property
Income, resources, and property brought to the marriage by either party
Examples:
- Parent with substantial premarital assets generating passive income
- Inherited property or trust income separate from marital estate
- Business or investment income from premarital sources
Fringe Benefits
Fringe benefits of the parents, including pension and health insurance benefits
Examples:
- Parent with employer-provided housing, vehicle, or meals
- Generous retirement plan contributions by employer
- Comprehensive health insurance covering entire family at no cost
Other Relevant Factors
Any other factor the court deems relevant to the child's best interest
Examples:
- Parenting time significantly different from typical arrangements
- Cost-of-living differences if parents live in different regions
- Tax consequences or benefits of support arrangement
Burden of Proof and Process
The parent asking for a deviation carries the burden of proof. In practice, that means showing more than “the guideline number feels wrong” — you need evidence that the presumptive amount is inappropriate or unjust and a clear explanation for the amount you want the court to order instead.
What You Must Prove
- • One or more statutory deviation factors actually apply
- • The guideline amount would be inappropriate or unjust
- • The requested deviation still serves the child's best interest
- • A specific alternative support number can be justified
- • The court can make written findings supporting the departure
What Usually Fails
- • General financial hardship with no statutory hook
- • Voluntary underemployment or lifestyle choices
- • New-family expenses or elective debt the parent chose to take on
- • Attempts to punish or reward the other parent
- • Informal deals the court never approved
Frequently Asked Questions
Use This With Other Arizona Tools
Support pages should route back into the core Arizona calculators and legal explainers.
Legal References & Content Accuracy
Legal References
- statuteA.R.S. § 25-320 – Child support calculation and deviation factors
- officialArizona Child Support Guidelines – Official state guidelines and worksheets
Content Accuracy & Updates
This guide is based on Arizona Revised Statutes and Child Support Guidelines in effect as of January 2025. Arizona child support laws and procedures are subject to legislative amendments and judicial interpretation.
This content is for educational purposes only and does not constitute legal advice. Every child support case is unique, and deviation determinations are highly fact-specific. Courts have broad discretion in evaluating deviation requests. For guidance on your specific situation, consult a licensed Arizona family law attorney.
Last Updated: January 15, 2025
Content Review: Based on current Arizona statutes and case law