A Summary Of The Child Support Guidelines In Arizona

By Bill Bishop, Arizona Divorce and Family Law Attorney
*Certified Family Law Specialist, Arizona Board Of Legal Specialization
Bishop, Del Vecchio & Beeks Law Office
(602) 749-8500


Child Support in Arizona is determined pursuant to the Arizona Child Support Guidelines. The Child Support Guidelines have been recently modified and updated as of January 1, 2022. If you are under a prior child support order, you may be entitled to a modified (different) amount of child support based upon your circumstances.

Once the parties’ incomes, parenting time and certain child costs (such as child care and health insurance) are confirmed, the Court and/or the parties can determine the “presumed” child support obligation by utilizing the child support calculator. Court’s sometimes deviate from the presumed amount of child support depending upon the circumstances. The parties can generally stipulate (agree) to a different amount based upon their individual circumstances.

The Arizona Child Support Guidelines can be somewhat complex in an application where various factors are in dispute. The following is a basic description of how the Child Support Guidelines work for the reader’s ease of understanding.

Child Support is based upon the parties’ combined incomes (i.e. the higher the incomes, the more the combined child support obligation). In order to determine child support pursuant to the Arizona Child Support Guidelines, you first insert both parties’ incomes, which results in a basic child support obligation attributed to both parties. The child support obligation is divided between the parties pursuant to percentage of their respective income.  Where the parties’ combined incomes exceed $30,000 per month, the basic child support obligation no longer increases under the Arizona Child Support Guidelines.  In such instance, it would be up to the child support recipient to show that an upward deviation in the amount of child support is appropriate under the circumstances.

By paying child support, this does not mean you are paying all of the support for the children. Rather, based upon both parents’ incomes, respective parenting time, and the child’s expenses for health insurance, child care costs, and education costs, the child support payor is paying a proportionate share to the other parent so that at the end of the day each party is paying a percentage of the overall base costs for the child proportionate to his and her income.

As a simplified example, if Mother earns $7,500.00 per month, and Father earns $2,500.00 per month, the percentage is 75% Mother and 25% Father. This does not mean that Mother owes Father a child support obligation. If Mother is the primary residential parent, Father may owe Mother 25% of the child support obligation while Mother “assumes” 75% of the obligation through her normal financial support of the children while they are in her primary care.

If one of the parties for example pays the child’s health insurance costs, this is taken into consideration in the child support worksheet so that the other parent pays his or her proportionate share prior to the final calculated amount. Under the above example, if Father is paying the child’s health insurance costs each month, Mother ultimately pays her share of these costs as an offset before the final child support amount is calculated. 

If the parties have equal income and equal parenting time, there may not be a child support order. If one party is the primary residential parent, the other party will generally have to pay child support (but not always depending upon the circumstances).

The more children the parties have, the higher the child support obligation (up to six children). However, such is not a direct correlation (i.e. having two children does not result in a child support that is double that realized if the parties only have one child). Rather, the Child Support Guidelines recognize an economy of scale (i.e. that it does not cost two times more to raise two child rather than one).

As noted above, the obligated party often does not realize the party receiving child support also has an inherent child support obligation. Such is realized pursuant to the assumption that the cost of providing support for the children exceeds the amount received in monthly child support. Thus, the paying parent is paying his or her portion of the overall assumed cost in proportion to the comparative incomes of the parties.

The cost of raising children as determined by the Arizona Child Support Guidelines is not limited to out of pocket costs for health care, meals and clothes. Rather, the Child Support Guidelines take into account national average costs (adjusted by state) for many inherent costs such as home size, utilities and various other costs.

Sometimes a parent will ask the other parent for an accounting or to prove what he or she is using his or her child support payment for. Except for additional costs added to the child support worksheet (health insurance costs, child care costs, educational costs), a parent receiving child support generally does not have to prove what he or she is spending for the child. Rather, it is assumed that each parent is providing the basic needs for the children, including housing, utilities, food, clothing etc.

With regard to determining the child support amount pursuant to the child support worksheet, the parties first insert their respective incomes. After inserting each parties’ incomes, there are various adjustments that take place before determining the final child support obligation:

  1. If one parent pays spousal maintenance to the other parent, the paying parent’s income is decreased and the recipient parent’s income is increased by the amount of such spousal maintenance award (the Court has the discretion to tax effect such payments). This changes the percentages of the parties’ respective incomes, which in turn changes the amount of the child support obligation.
  2. If a party has other children (i.e. children from prior or subsequent relationships), such party generally receives a further downward adjustment to their income in the amount of their child support obligation (or presumed inherent child support obligation pursuant to the guidelines), which results in a change to the percentages. This does not apply to step-children.
  3. The party who pays the health care insurance for the children is credited with the amount of such payments so that each party pays a percentage of such obligation pursuant to the final child support calculation.
  4. In the same regard, the party who pays the child care costs for the children is credited with the amount of such payments so that each party pays a percentage of such obligation pursuant to the final child support calculation.
  5. If one or more children are twelve years old or older, such will result in a 10% increase to the base support obligation for that child.
  6. Child support is also adjusted pursuant to the parenting time that the paying party exercises. The more the parenting time, the higher the adjustment. If the parents share equal parenting time, the largest adjustment applies. In such event, there is merely an equalization of the child support obligations between the two parties based upon their incomes which generally results in an even lower child support obligation (or no child support obligation if the parties’ incomes and child expenses are substantially equal).

The Supreme Court of Arizona provides a child support calculator online which is free of charge. You can merely log on to the website and insert both parties’ incomes and adjustments as described above in order to calculate child support. Because not all factors are not always known, you can insert numerous scenarios (i.e. changes in incomes, anticipated changes in parenting time, termination of child care expenses, etc.) in order to assess various situations.


Here is a more in-depth summary of each section of the Child Support Guidelines provided by our Phoenix child support attorneys. Such descriptions have been drafted for the ease of reading and understanding. Not all sections and provisions of the Child Support Guidelines are addressed herein. For a review of the full text of the Arizona Child Support Guidelines, click here.

Background: The Arizona Child Support Guidelines Follow the “Income Shares Model”. Such is based upon extensive research regarding the approximate amounts which would have been spent on the children if the parents and children were living together. Each parent contributes his / her proportionate share of the total child support amount as described previously.

Author’s Note: The Child Support Guidelines are not perfect for the reason that every situation is different. The guidelines are intended to provide some uniformity, however. The Guidelines do allow for deviations to the guidelines child support amount in some circumstances, however, different judges are often not always consistent with one another regarding the circumstances that they feel warrant a deviation. Deviation cases are discussed in more detail later .

Section 2 – “Premises”

Child Support obligations have priority over all other financial obligations. The existence of other financial commitments and debts is generally not a reason for the failure to pay child support, or for a deviation from the guidelines.

Author’s Note: If your income changes or the other party’s income changes, or if other circumstances change, you will need to file a modification proceeding. We recommend contacting a child support modifications lawyer for counsel. You cannot just reduce your child support without a Court order. For example, if one of the children graduates, that does not mean that you can reduce your child support without a court order. Even if the other party agrees to a reduction, such should be confirmed in writing and stipulated to pursuant to a formal court order. Otherwise, you may have a very unpleasant shock later when the other parent asks for substantial child support arrears that you thought you did not have to pay.

Section 3 – “Presumption”

It is presumed that the child support guidelines amount is the sum to be ordered. Thus, general arguments that the other parent is not spending the child support amounts on the children, and other ‘fairness’ arguments will likely fail. The parent receiving child support has no obligation to show the paying party what he or she is spending the child support funds on.

Other arguments, such as the other party is not working to full capacity, is voluntarily underemployed, that a deviation should be entered, and other issues are still fair game and should be presented to the Court.

Section 4 – “Duration of Child Support”

The presumptive duration for child support is until the youngest child turns 18 or graduates from high school, whichever is later (but in no event later than 19 years old). There are some exceptions regarding special needs children which may lead to a child support obligation past 18 years old and in some situations for life.

Author’s Note: You should always request that the court stop any order of assignment at least 60 days in advance of the presumptive termination of the child support order to avoid being over-garnished.

Section 5 – “Determination of The Child Support Income of the Parents”

One of the most litigated issues in child support proceedings is what income to attribute to one or both of the parties. This can be very complicated when dealing with parties that are self-employed and pay personal expenses through the business or do not include all of their income (i.e. under the table income).

Child Support Income or purposes of the Guidelines may be different than gross income for tax reasons. Child Support Income includes income from “any” source. Such includes but is not limited to salaries, commissions, bonuses, employment benefits that reduce personal expenses, investment income, severance pay, pensions, interest, trust income, social security benefits for the parent, unemployment benefits, disability benefits, recurring gifts, spousal maintenance etc. Seasonal or fluctuating income is to be annualized (i.e. you take the yearly amount and divide it by 12 to come up with an average monthly amount). If the income is not recurring or continuing, the Court has the discretion not to include it. Courts generally do not include overtime or income from second jobs unless such income is consistent and regular and expected to continue in the future. State or federal assistance is generally not included in an income determination. Child support received pursuant to another child is not included as income. If a parent receives military disability payments, different rules may apply.

Certain employment benefits such as a company providing an employee a car for personal use may be counted as additional income.

Income from self employment means gross receipts minus ordinary and necessary expenses required to produce such income. Thus, the Court can add back certain types of write offs such as equipment and automobile depreciation, personal car expenses run through the business, and other more personal type of expenses – even if such are legitimate tax write-offs. The issue is whether such expenses “reduce personal living expenses”. If so, such may be added to a person’s income.

Author’s Note: The determination of a party’s “child support income” can be one of the most controversial issues in a child support case. When one of the parties is self employed, receives cash, writes off business expenses through the company, etc., it can be difficult to determine a fair amount of income to attribute to such person. You can always ask the Court to appoint a C.P.A. to provide an analysis of such person’s true child support income. We and/or the CPA often find ourselves reviewing bank statement deposits, credit card statements and other financial documents of the other party to establish that a party is earning more income than they claim.

If a person is unemployed or working below full earning capacity, the Court may attribute additional income depending upon the circumstances. It depends upon whether such is a voluntary choice and not for reasonable cause. If such unemployment or reduction of income is not for reasonable cause, the Court may attribute additional income up to a party’s earning capacity. Generally a party is attributed at least minimum wage on a 40 hour per week basis. If income is attributed however, appropriate child care costs may also be attributed (i.e. a parent who is staying home with a child, thus avoiding child care costs, should not be attributed full income without also assessing child care costs). Reasonable cause for unemployment or underemployment may include such things as a parent’s physical or mental disabilities, whether a parent is engaged in reasonable career or occupational training or education, or has a child with unusual needs that limit a parent’s ability to work.

A parent’s new spouse’s income is not treated as income under the guidelines. However, if a spouse is not employed because he or she is relying upon her spouse’s income, the Court should still attribute income to the non-working spouse (if physically and mentally able to work) as the decision not to work would be voluntary.

Author’s Note: A parent’s spouse’s income may provide a legitimate basis for a child support deviation as addressed in Section 20 below.

Section 6 – “Adjustments To Gross Income”

This section regards adjustments to one’s Child Support Incomefor purposes of calculating the child support percentages, and adjustments to the child support award itself.

Adjustments to income include spousal maintenance, i.e, if you are paying spousal maintenance (alimony) to the other parent, your income is reduced and the other parent’s income is increased by such amount. As noted previously, the Court has the discretion to tax effect this since spousal maintenance can no longer be written off on your taxes and is not included as income on the other party’s taxes. If you have other children that are not part of the child support award (for example, children with your new spouse), your income is reduced as well. Keep in mind that there is no adjustment for step children. Rather, you must be the biological or adoptive parent for such adjustment to apply.

Adjustments to the child support award once incomes are determined are made in order to reflect each party’s respective contributions towards the child’s insurance, necessary education costs, and child care costs. Thus, even if one parent is paying the entire amount, the child support award will be adjusted so that the other parent’s proportionate percentage of such obligation is factored.

Section 8

In this section, it explains that the guidelines stop at the combined gross income of $30,000.00 per month between the two parents. If the combined incomes exceed this, such excess income is relevant only to the final percentages. The base child support amount stops at the combined gross income of $30,000.00. Such also stops at six children, so if there are more than six children, there is no increase in child support absent a deviation. A party can always attempt to argue a higher child support obligation than this, but has the burden to prove that a higher amount is reasonable and supported by the evidence (See Section 20 regarding deviations to the guidelines child support amount). Courts cannot provide for significant deviations from the guidelines without specific reasons for doing so.

Section 9.A.

This section addresses medical and other health care insurance for the children.  Unless the children are on AHCCS (Arizona Health Care Cost Containment System), the Court is required to order that one of the parents provide such coverage, although both parents generally share the cost through the overall child support calculation. As stated in the initial portion of this article, the cost for such insurance is divided pursuant to income and child support contribution. If such coverage covers other persons other than the children in question, the amount of insurance payment applicable to the children at issue is generally pro-rated.  Unless ordered by the Court, parents are not obligated to provide dental and vision coverage, but will generally receive credit if they do provide such coverage.

The courts generally assign each parent a percentage he or she is required to pay toward reasonable and necessary uncovered health care expenses. Such is based again on the percentage of adjusted income / child support contribution.

Requests for reimbursement of medical and other health care expenses that are not covered by insurance are supposed to be made within 180 days after the date of services. The other party is supposed to pay his or her reimbursement share within 45 days of receipt of request. Such requests for reimbursement should include proof of services provided, proof of what the insurance company covered, and proof of the net payment made for the remaining sums owed. A parent who does not pay his or her share may be held in contempt as addressed in the Child Support Enforcement section of our website.

Section 9.B

Section 9.B of the Arizona Child Support Guidelines addresses child care costs. Such are to be annualized (for example, if you only use summer child care, you would take the overall expense and divide such by 12 to come up with a monthly average). As noted in the initial section of this article, child care costs are divided proportionate to adjusted income / child support contribution. One party is generally assigned the overall cost, but then the other parent pays their portion through the final child support calculation. Tax credits for child care costs are included in the final calculations so that both parties share such benefit even if only one party can claim it on his or her tax returns.

Private school costs may be included in the overall child support calculations. However, such must generally be ordered by the Court or agreed upon by the parents.

Special needs children: The Guidelines may be adjusted to provide for special needs or handicapped children.

Necessary educational costs: Because these may vary, we generally assign a percentage that each party pays rather than include a set amount in the child support worksheet.

Older child adjustment: 10% is added to the basic child support obligation for children over 12. Such is pro-rated if some children are over 12 and others are under 12 (for example if one child is over 12, and one child is under 12, a 5% adjustment will apply).

Section 11 – “Adjustment For Costs Associated With Parenting Time

The Child Support Guidelines attempt to further apportion the costs associated with the children pursuant to each parties’ respective parenting time. The Guidelines assume that the more parenting time one has, the more he or she spends for the benefit of the children.

The parenting time adjustments set forth by the Guidelines are rounded up. Such are set forth as follows:

Once you add the total number of days during the year, the parenting time adjustment is inserted. For example, 115 – 129 days per year requires an adjustment of .2 or 20%. See the Child Support Guidelines for the specific adjustment chart.

Author’s Note: All of these percentages etc. sound complicated, but the Child Support Guidelines calculator only requires that you insert the base information. The program then calculates the support obligation for you based upon the information inserted.

Section 12 – “Equal Parenting Time”

If the time spent with each parent is essentially equal, the child support obligation is generally affected to the most substantial degree. A parenting time adjustment no longer applies. Rather, you take each party’s child support obligation (after including health care and other expenses) and divide it by two so that there is merely an equalization sum paid from the higher income parent (i.e. 50% of the difference between the parties’ respective child support obligation amounts). The child support pursuant to an equal time sharing arrangement is generally much less than child support where a party has less than equal time and receives a percentage adjustment.

Section 16 – “Multiple Children, Divided Custody”

Things get a bit more complicated where the parties have divided custody, i.e., where one parent is the primary custodial parent for one or more of the children, while the other parent is primary custodian for one or more of the other children.

Generally speaking, you would prepare a child support worksheet which calculates the child support mother owes father based upon the children in his care, and another child support worksheet which calculates the child support father owes mother based upon the children in her care. You then offset the two. The party with the higher child support obligation thus owes the other party the difference.

Section 18 – “Travel Expenses Associated With Parenting Time”

If the parents reside in different states (or over 100 miles apart), the Court may allocate travel costs associated with parenting time. Travel costs can be very expensive, especially when the children are young and cannot fly alone. The Courts will generally consider the parents’ respective incomes in determining the allocation of travel costs, as well as the reason for the parents residing in different states (i.e. did a parent voluntarily move to the different state, thus creating the situation?). The Court also considers whether travel expenses will make it preclusive for a parent to see the children, and should thus take such into account. The Court has broad discretion in determining how such travel expenses are divided or whether one of the parents should pay the entire amount of the children’s travel expenses to see the other parent.

Section 20 – “Deviations”

The amount that is produced by the Child Support Guidelines is the presumed amount that the Court should order unless it is convinced that such amount is not appropriate under the circumstances. The Court has the ability to deviate from the Child Support Guidelines. This means that the Court can order a higher or lower amount of child support pursuant to specific reasons and so long as such is in the children’s best interests.

The Court can deviate from the guidelines if it finds that the application of the guidelines would be inappropriate in the particular case, the best interests of the child is considered, and other procedural requirements are followed. The Court can look to what the children’s standard of living would be in an intact household (i.e. where the parents and the children were all residing together), and adjust the child support amount so that the parents can provide a similar standard of living for the children in both households (it is not the parent’s standard of living that applies to this analysis, but the children’s). These are fairly broad factors, thus the Court has a great deal of discretion in providing for an upwards or downwards deviation in child support. It is often very beneficial to employ a CPA or other financial expert when presenting a deviation case to the Court.

Example: One of the parents is able to take the children on expensive vacations that the other parent cannot afford, or can purchase things for the children that the other parent cannot afford.  This does not mean that the children should live an excessive life-style. However, the Court can provide a deviation so that the parent who cannot afford to provide the children with a similar standard of living can at least come closer to doing so.

Example:  One of the parties is remarried and as a result can provide a much higher standard of living for the children. The income of such parent by itself may not reflect the standard of living provided to the children in that household.

Section 27 – “Federal Tax Credit For Dependent Children”

The tax benefits for the minor children are generally divided proportionate to adjusted gross income / child support contribution. For example, if one parent pays 67 % of the overall child support obligation, such parent should be able to claim the children two out of every three tax years. One must generally be current in his or her child support payments (including any scheduled arrears payments) by the end of the year in order to be able to claim such tax benefits.

Head of household filing status is an issue that should also be included in any final Court orders. These are dependent upon federal tax regulations.


While a party’s base child support obligation is pretty much standard in man respects, the Court does have substantial discretion regarding some of the sub-issues, such as determining what income should be attributed toward a party, and whether a deviation is appropriate.