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FL-643Optional

Declaration About Parent's Income or Earning Capacity During Judgment Periods (Governmental)

California · Judicial Council of California · Effective January 1, 2026

This form is a declaration used to tell the judge that the child support amount was based on an income that was higher than what the person actually earned at the time. It asks for details about the actual income and earning capacity for specific time periods.

The court describes it as: Tell the judge why the child support amount was based on more money than you were actually making at the time.

Open the official PDFfrom Judicial Council of California

Where this fits in a case

Judgment

Stage: Judgment

This form is used when a Judgment Regarding Parental Obligations was entered using a person's earning capacity or presumed income, but the actual income was different.

Either party may file.

Common questions

Who fills out this form?
The form is for the parent who is ordered to pay support, the person ordered to receive support, or a representative of the local child support agency. The form is marked as optional use.
What does this form ask for?
It asks for the actual income and other factors needed to calculate the correct support amount for specific time periods listed in the judgment.
Does this form require a fee?
The provided text does not mention any filing fees.

Revision history

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

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