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How Form 14 works under the updated Rule 88.01 schedule that took effect January 1, 2026

Missouri calculates child support using a standardized worksheet called Form 14, and on January 1, 2026, a new Schedule of Basic Child Support Obligations took effect under Missouri Supreme Court Rule 88.01 — which can change the presumed child support amount even when nothing else about a family's situation has changed. Here's how the calculation works, what changed, and when an existing order may be eligible for modification.