How Divorce Works: Custody, Child Support, Property Division, and Spousal Maintenance

Child Custody Arrangements

No matter where you live, custody decisions are supposed to be guided by one central question: what arrangement serves the child's best interest? Courts and mediators weigh the whole family picture rather than any single factor — each parent's relationship and history with the child, each parent's ability to provide a stable and safe home, the child's ties to school and community, each parent's willingness to support the child's relationship with the other parent, both parents' health, any history of violence or substance abuse, and, as children get older, their own preferences.

Most states also split custody into two categories that are easy to conflate. **Legal custody** covers decision-making authority over things like education, healthcare, and religious upbringing. **Physical custody** (often called "parenting time") covers where the child actually lives day to day. Either can be awarded solely to one parent or shared jointly, and it's common for parents to share joint legal custody while one has primary physical custody. A growing number of states — Arizona and Kentucky among them — have moved toward presuming roughly equal parenting time when both parents are fit, though this still isn't the rule in most states, and outcomes continue to depend on the specific family.

What Determines Child Support

Child support is calculated using a state-specific guideline formula rather than a judge's personal discretion, and most states fall into one of three models. The majority — around 41 states, including California, New York, and Texas's underlying framework — use the "income shares" model, which estimates what the child would have received if the parents had stayed together and divides that amount between the parents based on their relative incomes. A smaller group of states, including Alaska, Mississippi, Nevada, North Dakota, and Wisconsin, use a "percentage of income" model that bases support on a set percentage of the paying parent's income alone. A few states — Delaware, Hawaii, and Montana — use the more complex Melson formula, which builds in a basic-needs reserve for both parents before calculating support. Whichever model applies, the actual number is shaped by both parents' gross income, the number of children, healthcare and childcare costs, support obligations for other children, and how many overnights each parent has with the child, since more shared parenting time typically reduces the paying parent's obligation. Because the formula is largely mechanical once the inputs are known, child support is often one of the more predictable pieces of a divorce to resolve.

Dividing Assets and Liabilities

How a couple's property and debts get divided depends heavily on which of two systems their state follows. Nine states — Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin — are **community property states**, where nearly everything acquired during the marriage is treated as jointly owned and typically split 50/50, while property owned before the marriage or received individually as a gift or inheritance generally stays separate. The remaining states follow **equitable distribution**, which aims for a fair — not necessarily equal — division based on judicial discretion. Equitable distribution courts typically weigh the length of the marriage, each spouse's age, health, income, and earning potential, each spouse's contribution to acquiring marital property (including non-financial contributions like homemaking or supporting a partner's career), whether either spouse sacrificed career opportunities for the family, the custody arrangement, and, in some states, whether one spouse wasted, hid, or dissipated marital assets. In both systems, debts acquired during the marriage are generally divided using the same framework as assets.

What Factors Determine Spousal Maintenance

Spousal maintenance (also called alimony or spousal support) isn't automatic in every divorce — courts look at whether one spouse needs support and whether the other has the ability to pay it, and then at how much and for how long. The length of the marriage is one of the biggest factors, since a 25-year marriage creates a very different financial picture than a 5-year one, and many states tie the duration of support to a rough ratio of the marriage length. Courts also look closely at each spouse's income and earning capacity — including education, work history, and how much time, if any, was spent out of the workforce raising children or supporting the other spouse's career — as well as the standard of living established during the marriage, both spouses' age and health, the property and debt each spouse is walking away with, and each spouse's household and childcare contributions during the marriage. The goal generally isn't to punish either spouse, but to prevent a dramatic financial cliff for the lower-earning spouse while remaining realistic about what the paying spouse can actually afford.

Why Mediation Works Better for All Four

Because so much of this — custody, child support, property division, and spousal maintenance — comes down to factors a couple usually understands better than a judge ever could from a single hearing, mediated agreements tend to hold up better and cost far less than litigated ones. At Low Flat Fee Divorce Mediation, we help couples work through each of these pieces together, at a predictable flat cost, so you leave with an agreement that fits your actual family and finances — not one imposed on you after months in court.

This overview is general educational information about how divorce-related laws commonly work across the United States. It is not legal advice, and laws, guideline formulas, and procedures vary by state and change over time. For guidance specific to your situation, we recommend speaking with a licensed family law attorney in your state or scheduling a session with one of our mediators.*