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Handling Child Support in Joint Custody Arrangements

by | Feb 19, 2025 | Child Custody

How does child support work when both parents share custody?

Co-parenting can be a great way for kids to stay close to both parents. But when money gets involved, things can get messy. Who pays for what? What happens if one parent makes more? What if expenses change over time? A Tacoma family law attorney can help you answer these questions and ensure child support arrangements are fair for both parents and, most importantly, the child.

The right guidance and advice on joint custody arrangements matter. A knowledgeable family law attorney can explain legal options, help with agreements, and intervene when conflicts arise. Read on to learn how child support works in joint custody, common challenges, and how to protect your child’s well-being. 

Quick Summary: 

  • In Washington, both parents must contribute financially to their child’s upbringing, even in a shared custody arrangement. Payments are calculated based on combined net income, considering wages, taxes, and deductions. Even with equal parenting time, the higher-earning parent may still be required to support and maintain stability across both households.
  • Washington law assumes child support is paid to the parent with primary custody, but this can be complicated in joint custody cases. Judges consider several factors, including income, medical needs, and financial responsibilities for other children. Even with equal time-sharing, the court ensures that financial contributions remain fair and balanced.
  • Child support orders can be adjusted based on a parent’s income, unexpected expenses, or specific child-related needs. Courts may modify support to reflect changes in financial circumstances, but payments cannot exceed 45% of a parent’s net income. Low-income parents are required to pay a minimum of $50 per child.
  • Clear communication, consistent routines, and shared responsibilities help reduce conflicts in joint custody arrangements. Parents should create structured parenting plans, avoid speaking negatively about each other, and work together to make decisions. Flexibility and cooperation ensure a smoother transition for children between both homes.

Understanding Joint Custody Arrangements in Washington

In Washington, both parents must financially support their children, even when they share custody. Child support is determined using the Washington State Child Support Schedule, which calculates payments based on parents’ combined net income and the number of children. Even with a 50/50 custody split, one parent may still have to pay child support if their income is higher.

Who Pays Child Support Obligations in Joint Custody Situations in Washington?

Washington law assumes that child support is paid to the parent who has the children most of the time. However, this can create confusion in shared custody situations. Courts don’t automatically assume a 50/50 split is best. Still, they encourage joint custody when both parents can provide a stable home.

The parent who has the child more often is called the custodial parent. The other parent, the non-custodial parent, usually pays child support. The state assumes custodial parents meet their financial responsibility by covering daily expenses like housing, food, and clothing.

Judges can adjust child support payments based on several factors, including:

  • A child’s medical or special needs
  • The lifestyle the child had before the parents separated
  • Whether a parent has financial responsibilities for children from another relationship
  • Whether the child spends equal time with both parents

Why One Parent May Still Pay Support in a 50/50 Custody Arrangement?

Even when parenting time is equal, the court may still order support payments to maintain financial consistency between both households. If one parent earns significantly more, they may need to pay child support so the child can access similar resources in both homes. Washington courts aim to prevent financial imbalances affecting a child’s well-being.

Limits on Child Support Payments

Washington law caps the maximum child support a parent can be required to pay at 45% of their net income. This ensures no parent is burdened with an unmanageable payment. The minimum child support obligation for lower-income parents is $50 per child, preventing undue financial hardship.

Understanding child support obligations in joint custody situations in Washington can be difficult. A Tacoma family law attorney can help parents ensure a fair arrangement that prioritizes their child’s needs.

Factors that Affect Child Support in Washington in Joint Custody

Washington courts consider several factors when determining child support obligations when parents share custody. The goal is to ensure that parents contribute fairly to their child’s needs. See below for factors that affect child support in joint custody cases.

Income and Financial Resources

The court examines both parents’ earnings, including wages, salaries, overtime, commissions, and other income sources. However, the fundamental child support obligation is based only on the parent’s income. Net income is used for calculations, meaning taxes, Social Security, Medicare, state industrial insurance, mandatory union dues, and pension contributions are deducted before determining child support.

Number and Ages of Children

The Washington State Support Schedule provides a formula that calculates child support based on the number of children. The court may increase the amount when a child turns 12 to account for higher expenses, such as school costs, extracurricular activities, and general living expenses.

Childcare and Healthcare Costs

Child support calculations include daycare, after-school care, and medical expenses, including insurance premiums and out-of-pocket costs. Both parents are expected to contribute based on their share of the total income.

Impact of Parenting Time on Child Support

Even when both parents share custody, child support payments may still apply. Washington uses a standardized model to account for parenting time. Support payments may decrease if a child spends more time with a parent who earns less. However, a 50/50 custody arrangement does not automatically cancel child support. The parent with the higher income may still be responsible for payments.

Tips on How to Handle Joint Custody and Co-Parenting 

Co-parenting can be challenging, but a healthy approach dramatically impacts a child’s well-being. In Washington, parents who share custody need to work together to create a stable and supportive environment. Here are some essential ways to make co-parenting smoother.

Keep Communication Open and Respectful

Active listening, avoiding blame, and using clear language can reduce tension and keep things focused on the child. Parents who communicate well can handle changes and disagreements more smoothly.

Set Clear Expectations

A well-structured parenting plan should outline decision-making responsibilities, discipline approaches, and schedules for holidays, school events, and pick-ups. Sticking to these agreements creates stability for the child.

Stay Consistent Across Both Homes

Children do better when they know what to expect. Kids feel more secure when parents agree on rules, discipline, and routines like meal times, bedtimes, and homework. Keeping similar expectations across households makes transitions easier.

Put the Child First

The child’s needs should always come before disagreements. Avoid speaking negatively about the other parent or using children as messengers. Before presenting plans to the child, discuss them with the co-parent to ensure clarity and fairness.

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