Child Support When You Have Another Child
A new child from another relationship can lower (but not erase) an existing support obligation — how multi-family adjustments work in percentage and income-shares states.
A new child does not automatically reduce support, but most states account for obligations to other children. Percentage states (like Texas) use a sliding multi-family chart — e.g., a 1+1 case calculates at a reduced rate per order. Income-shares states consider other-child support as an adjustment in the guideline worksheet.
What to file
- A modification request citing the new dependent (birth certificate + support order for the new child).
- In percentage states, cite the multi-family chart in the statute (e.g., Tex. Fam. Code § 154.129).
- In income-shares states, the new child’s support is typically deducted before the combined income split.
Modification Eligibility Checker
Uses Florida’s real, documented modification threshold (data retrieved 2026-08-09).
Your recomputed change is 24% ($279/mo), which meets Florida’s 15% or $50/mo threshold — you likely qualify to modify.
Florida rule: Florida presumes a substantial change when recomputed support differs by 15% or $50, whichever is greater (Fla. Stat. § 61.14).