Skip to content
LitigationForms
FL Modify 521Mandatory

Motion to Adjust Child Support Order

Washington · Washington State Courts · Effective July 1, 2023

This form is used to ask the court to change an existing Child Support Order. It is used when at least two years have passed since the last order, and the only reasons for the change are that the parents' income, the economic table, or child support standards have changed.

Open the official PDFfrom Washington State Courts

Where this fits in a case

Motions

Stage: Motions

This form is used when a parent believes that the child support order needs to be adjusted because of changes in income, economic standards, or the passage of time.

Either party may file.

Common questions

Who should fill out this form?
The person asking the court to adjust the Child Support Order fills out this form. This person is filing and serving proposed Child Support Schedule Worksheets with it.
What must I do if I file this motion?
The person filing must schedule a hearing for this motion. They must also file their original documents with the Superior Court Clerk and serve copies on all other parties.
What if I disagree with this motion?
If a party does not agree with the requests, they can file a statement explaining why the court should not approve the requests.

Revision history

No changes recorded since we started tracking this form on October 9, 2026. The current version took effect July 1, 2023.

Related forms

  • FL All Family 001

    Confidential Information

    This form is used to provide private details about people involved in a family law case. It asks for personal information, details about any existing protection orders, and information about any children involved.

    MandatoryWord4 translations
  • FL All Family 011

    Sealed Financial Source Documents (Cover Sheet)

    This form acts as a cover sheet to keep financial documents private from the public in family law and guardianship cases. It is used to organize and mark documents that need to be kept confidential by the court.

    MandatoryWord
  • FL All Family 012

    Sealed Personal Health Care Records (Cover Sheet)

    This form is a cover sheet used to keep personal health information private from the public in court files. It is used to mark documents that contain sensitive health records so they are kept confidential.

    MandatoryWord
  • FL All Family 013

    Sealed Confidential Report (Cover Sheet)

    This form acts as a cover sheet to keep certain parts of a report private from the public in family law or guardianship cases. It is used to mark documents that contain confidential information.

    MandatoryWord
  • FL All Family 120

    Notice of Address Change

    This form lets a person tell the court and the other people in the case that their mailing address has changed. It asks for the new physical address and an optional email address where legal papers can be sent.

    MandatoryWord
  • FL All Family 131

    Financial Declaration of (name): _______________

    This form asks for a detailed look at a person's money situation, including income, expenses, and assets. It collects information about both the person filing the form and the other party in the case.

    MandatoryWord4 translations
  • FL All Family 135

    Declaration of (name): _________________

    This form is a declaration that allows a person to state facts under penalty of perjury. It asks the person filling it out to state their age, whether they are the Petitioner, Respondent, or other, and to sign it to confirm the facts are true.

    MandatoryWord
  • FL All Family 185

    Notice of Hearing

    This form is a Notice of Hearing that tells everyone involved in a case that a court hearing has been set. It provides the date, time, and location for the hearing and explains what the hearing is about.

    MandatoryWord4 translations