How Washington Courts Decide Custody: The 16 Factors Explained

The legal framework

RCW 26.09.187 governs how Washington courts establish parenting plans. The statute requires the court to consider:

• The strength of each parent's relationship with the child
• The ability of each parent to perform parenting functions
• Each parent's involvement in caregiving before separation
• The child's emotional needs and developmental level
• The child's relationship with siblings and other significant adults
• The child's involvement in school and activities
• Each parent's wishes and the child's wishes (if mature enough)
• Each parent's employment schedule and willingness to facilitate

The court is also required to consider whether to limit one parent's parenting because of misconduct: domestic violence, abuse, neglect, substance abuse, abandonment, or willful refusal to perform parenting functions. These limiting factors are in RCW 26.09.191.

Factor 1: The strength of the parent-child relationship

What courts measure: The depth and quality of the existing bond between each parent and the child. This isn't about love; it's about functional involvement: who attends school events, who knows the child's friends, who notices when something's wrong.

Strong evidence: Photos showing daily involvement, school records signed by you, medical appointments you attended, declarations from teachers, coaches, doctors describing your involvement.

Weak position: Long absences, missed school events you knew about, unfamiliarity with child's daily routine.

Factor 2: Past parenting performance

What courts measure: What each parent has actually done in the years before separation. Not what they say they'll do; what they've already done. Courts give heavy weight to past behavior as the best predictor of future behavior.

Strong evidence: Long-running involvement in caregiving (cooking, bedtime, homework), photos and records over a long period, sustained pattern.

Weak position: Sudden involvement that started after separation, declarations contradicted by historical records.

Factor 3: Each parent's emotional ties to the child

What courts measure: How well each parent understands and responds to the specific child's emotional needs. A child with anxiety needs different parenting than a child with ADHD; the parent who knows this and adjusts wins this factor.

Strong evidence: Specific examples of recognizing emotional cues, working with therapists, adjusting routines for the child.

Weak position: One-size-fits-all parenting, dismissive of child's expressed feelings.

Factor 4: Past misconduct (RCW 26.09.191)

What courts measure: The "limiting factors", domestic violence, abuse, substance abuse, abandonment, willful refusal to perform parenting. If proven, these can result in supervised visitation or no contact.

Strong evidence: Police reports, protection orders, criminal records, medical records of injuries.

Weak position: Allegations without documentation; unsubstantiated claims tend to backfire.

Factors 5 through 16: The full framework

The remaining factors include: child's wishes (weighted by maturity), each parent's wishes, each parent's employment schedule, geographic proximity, the child's school and community ties, sibling relationships, the child's developmental needs, each parent's mental and physical health, willingness to facilitate the other parent's relationship, history of cooperation, ability to make joint decisions, and the child's adjustment to home, school, and community.

Each one has a similar pattern: specific evidence beats general claims. Documents beat declarations. Long patterns beat recent changes.

Common mistakes pro se parents make

Confusing "best parent" with "best for this child"

The court isn't comparing parents in the abstract. It's deciding what parenting arrangement serves this specific child. The "better" parent on paper doesn't always get more time if the parenting plan that works best for the child is different.

Attacking the other parent instead of supporting your own case

If 80% of your declarations are about how bad the other parent is and only 20% about your own parenting, the court reads that as a signal. Build your own case first; address the other parent's issues only where you have concrete evidence.

Confusing presence with parenting

"I'm with the kids every weekend" isn't enough on its own. The court wants to know what you do during that time, what you know about each child specifically, how you handle problems when they come up.

Working with us on parenting plans

Documenting your case across 16 factors is the kind of work where a structured drafting approach helps. Our most relevant services for parenting plan work:

• Parenting Plan Audit ($149) - review of an existing plan
• Standard Package ($895) - petition + parenting plan + declaration
• Complex Package ($1,795) - full filing set including parenting plan, declarations, and proposed orders
• "What Judges Look For" book ($19) - deep dive on every factor with evidence examples

Key takeaways

• Specific evidence beats general claims on every factor
• Past behavior is the heaviest weight; sudden changes look like trial preparation
• Build your own case first; address the other parent only with documented evidence
• Take the Custody Self-Assessment to find your weak factors
• If you want to go deep on this, the "What Judges Look For" book covers every factor with examples