Life changes, and when it does, your child support order may need to change too. California allows either parent to request a modification when circumstances have changed significantly.
When Can You Modify?
You can petition for modification when there’s been a material change in circumstances since the last order. Common qualifying changes include:
For Reducing Support
- ✅ Job loss or significant income reduction
- ✅ Disability or serious illness
- ✅ Increased custody time (you now have the children more)
- ✅ Other parent’s income has increased significantly
- ✅ New children from another relationship (limited impact)
- ✅ Incarceration (in some cases)
For Increasing Support
- ✅ Paying parent got a significant raise or new income source
- ✅ Children’s needs have increased (medical, educational)
- ✅ Receiving parent’s income has decreased
- ✅ Change in custody reducing the paying parent’s time
- ✅ Original order was below guideline
The Process
Step 1: Gather Financial Documentation
Before filing, collect: – Recent pay stubs (both parties if possible) – Tax returns (2 years) – Evidence of the changed circumstance (termination letter, medical records, new custody order) – Current Income and Expense Declaration (FL-150)
Step 2: File the Motion
| Form | Purpose |
| FL-300 | Request for Order (the main motion) |
| FL-150 | Income and Expense Declaration (updated) |
| FL-311 | Child Support Information and Order Attachment |
| MC-031 | Attached Declaration (explaining the changed circumstances) |
Filing fee: $60–$80
Step 3: Serve the Other Parent
The other parent must be served with all filed documents at least 16 court days before the hearing (plus 5 days if served by mail).
Step 4: The Hearing
Both parents present their financial information. The court runs the guideline calculation with updated numbers. The judge issues a modified order.
Important: Modifications are generally effective from the date you file — not retroactive to when the change occurred. File as soon as circumstances change.
What If the Other Parent Won’t Cooperate?
If the other parent: – Refuses to provide financial information → The court can impute income based on earning capacity – Doesn’t show up to the hearing → The court can modify based on your information alone – Is hiding income → Request a vocational evaluation or subpoena financial records
How Superior Court Docs Can Help
Superior Court Docs prepares your complete modification package — FL-300, FL-150, FL-311, and supporting declarations.
Starting at $599. 📞 (213) 973-7248 or get started.
Related: Complete Child Support Guide | Child Support Calculator
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