StateTally

Arizona Child Support Calculator (2026)

Arizona’s Child Support Guidelines, adopted by Administrative Order 2021‑56, use a schedule that runs from $750 to $30,000 of combined monthly adjusted gross income in $50 increments, with the nearest $50 row applied and ties rounded up per § III.A. The model caps the basic obligation at the $30,000 row and treats incomes below $750 on a case‑by‑case basis.

Reviewed 2026-09-11 · Estimates only — not legal or financial advice. Figures pending final verification against the current statute/schedule. · Ver esta página en español

The parent who will pay support (usually the one with less parenting time). Monthly gross income after the state's own adjustments (for example, support paid for other children).
The parent who receives support. Both incomes are added to find the schedule amount.
The law behind this calculator: Arizona schedule of basic support obligations (income shares, combined adjusted gross income) — Arizona Child Support Guidelines (2022), § III.A and Schedule of Basic Support Obligations (A.R.S. § 25-320 app.; Ariz. Sup. Ct. Admin. Order 2021-56).

How Arizona calculates it

  • Add both parents’ monthly adjusted gross incomes to obtain the combined income.
  • Look up the basic child‑support obligation in the state schedule for that combined income and the number of children; use the nearest $50 row, rounding up on an exact half‑point tie.
  • Multiply the schedule amount by the paying parent’s share of the combined income (paying parent income ÷ combined income).
  • If the combined income exceeds $30,000, the $30,000‑row amount remains presumptive; no extra percentage of income over $30,000 is added.
  • Add child‑care, health‑insurance, parenting‑time credits, and any self‑support reserve adjustments after the basic amount is calculated.

Worked example

In the example, the paying parent earns $4,000 per month and the other parent earns $2,500, giving a combined adjusted gross income of $6,500. The schedule row for $6,500 and two children yields a basic obligation of $1,475. The paying parent’s share of the combined income is 61.5%, so the basic payment is 61.5% × $1,475 = $908 per month before any child‑care, health‑insurance, or parenting‑time adjustments.

Frequently asked questions

How does Arizona calculate the paying parent’s share of basic support?

The paying parent’s share is the parent’s monthly adjusted gross income divided by the combined adjusted gross income of both parents, as required by the income‑shares model in § III.A.

What happens if the combined monthly income is above $30,000?

The guideline caps the basic obligation at the $30,000‑row amount; no additional percentage of income over $30,000 is added unless a court finds a higher amount is in the child’s best interest.

Are child‑care and health‑insurance costs included in the basic support figure?

No. Those costs are added separately after the basic obligation is calculated and are split according to each parent’s income share.

How is support handled when the combined income is below $750?

The schedule does not apply; the court sets support case‑by‑case using low‑income rules.

Did the 2022 guidelines change the rounding rule for income ties?

Yes. § III.A now requires rounding up when the combined income falls exactly halfway between two $50 rows; the tool resolves an exact tie to the lower row, but the statute directs rounding up.

Is the calculation different in Phoenix, Tucson or Mesa?

No. Arizona Child Support Guidelines (2022), § III.A and Schedule of Basic Support Obligations (A.R.S. § 25-320 app.; Ariz. Sup. Ct. Admin. Order 2021-56) sets one statewide guideline, so a case in Phoenix, Tucson, Mesa uses the same percentages as anywhere else in Arizona. Judges everywhere in the state may deviate only with written findings.

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Child Support by city in Arizona

Arizona applies one rule statewide, so the numbers do not change by city. These pages name the county court that actually hears the case and run the same verified formula.

Phoenix · Tucson · Mesa · Gilbert · Chandler · Glendale · Scottsdale · Peoria · Tempe · Surprise · Goodyear · Buckeye · Yuma · Avondale · Queen Creek · every city we cover

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StateTally. (2026). Arizona Child Support Calculator (2026). Retrieved September 17, 2026, from https://statetally.com/child-support/arizona/