How to Modify Child Support or Custody After Divorce in Wyoming

Life changes after divorce. Jobs shift, incomes fluctuate, kids get older, and one parent may need to relocate. When circumstances change substantially enough, Wyoming law allows you to modify both child support and custody orders — but you can't just decide on new terms with your ex. You need to go back to court.

Here's what qualifies as grounds for modification, how to file, and what Wyoming District Courts actually look for.

Modifying Child Support

When You Can File

Wyoming uses an income-based child support formula tied to both parents' net incomes. To modify an existing child support order, you must demonstrate a "material change of circumstances" since the original order was entered. Common triggers include:

• A significant increase or decrease in either parent's income (job loss, promotion, disability)
• Changes in the child's needs (medical expenses, educational costs, childcare)
• Changes in the custody arrangement that shift the number of overnights
• One parent's health insurance costs changing substantially

Wyoming also allows a modification review if at least six months have passed since the last order was established or modified — you don't need to prove a material change if the state's Child Support Enforcement unit initiates the review.

How to File

File a Petition to Modify Child Support in the same District Court that issued the original order. You'll need to submit an updated Confidential Financial Affidavit and a new Child Support Computation Worksheet (Form DIVCP-13) showing the proposed calculation based on current incomes.

If your ex-spouse agrees to the modification, you can file a stipulated agreement for the judge's approval, which speeds the process significantly. If they disagree, the court will schedule a hearing where both parties present evidence.

The modified order takes effect from the date of filing, not the date circumstances changed — so file promptly once you have grounds. Back-dating isn't available.

Income Withholding

If child support is paid through wage garnishment, a new Income Withholding Order must be drafted after modification and served on the obligor's employer. Support payments don't automatically adjust just because the court signed a new order — the employer needs the updated withholding directive.

Modifying Custody

The Standard: Best Interests of the Child

Custody modifications in Wyoming require proving both a material change in circumstances and that the modification serves the child's best interests. Courts are generally reluctant to disrupt stable custody arrangements, so the bar is intentionally higher than for support modifications.

Factors that can support a custody modification include:

• One parent's relocation that significantly affects the existing parenting schedule
• A child's preference (courts give increasing weight as children mature)
• Evidence of substance abuse, domestic violence, or neglect
• One parent consistently interfering with the other's parenting time
• Significant changes in a parent's work schedule or living situation

Relocation Rules

If the custodial parent plans to move more than a certain distance or out of state, Wyoming requires advance written notice to the other parent. The non-relocating parent can object, and the court will decide whether the move serves the child's best interests. Relocation disputes are among the most contentious post-divorce custody issues.

Filing the Petition

File a Petition to Modify Custody in the original District Court. Include a proposed parenting plan showing the schedule you're requesting. If both parents agree, a stipulated modification can be submitted directly for judicial approval.

For contested modifications, expect a hearing and potentially a guardian ad litem appointment if the court wants an independent assessment of the child's interests.

Practical Tips

Document everything. If you're filing because of changed circumstances, bring evidence — pay stubs, tax returns, medical records, school records, or communication logs showing parenting time interference.

Don't modify informally. Verbal agreements between parents aren't enforceable. If you and your ex agree to changes, put them in writing and file them with the court. Otherwise, the original order remains the legal standard — and you could face contempt charges for not following it.

Keep your original orders. The court uses your original custody and support orders as the baseline for any modification. If you've lost them, request certified copies from the Clerk of District Court before filing.

The Wyoming After-Divorce Checklist covers support and custody logistics alongside every other post-divorce administrative task, with step-by-step instructions for what to file and where.

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