Child Support in Missouri: How It's Calculated
Missouri uses the Income Shares Model (Form 14) to determine child support obligations. This guide walks through how the formula works, what factors Missouri courts consider, and how to modify or enforce an order — with links to official Missouri resources.
Income Shares Model (Form 14) in Missouri
Missouri uses the Income Shares Model, with all calculations performed on a mandatory court form called Form 14. Both parents' gross incomes are combined, and the Schedule of Basic Child Support Obligations determines a combined obligation, which is then divided proportionally.
Missouri's Form 14 is the official calculation tool — all child support orders must include a Form 14 calculation. Missouri provides a parenting time adjustment when the non-primary parent exercises 35% or more of the overnights (approximately 128 nights). The parenting time adjustment is applied directly to the Form 14 calculation. Missouri courts can deviate from the Form 14 amount if the guideline amount is unjust.
Key Factors Missouri Courts Consider
- Both parents' gross monthly income
- Number of children
- Parenting time percentage — 35%+ triggers a parenting time adjustment on Form 14
- Child's health insurance costs
- Work-related childcare costs
- Extraordinary expenses ordered by the court
- Support obligations for other children
Official Missouri Resources
Get an accurate number from an official source
Child support calculations are complex and fact-specific. For an accurate figure, use Missouri's official worksheet or consult a licensed family law attorney. This guide explains the framework — it does not produce a binding calculation.
Step-by-Step: How Missouri's Formula Works
Here is how Missouri applies the Income Shares Model (Form 14) to calculate a child support obligation, step by step:
1. Determine each parent's income
Missouri starts by calculating each parent's income — gross income (before taxes). The specific definition of income is set by Income Shares Model (Form 14).
2. Combine incomes and find the basic obligation
Both parents' incomes are combined and compared to Missouri's child support schedule. The schedule produces a basic child support obligation based on combined income and the number of children.
3. Add health insurance and childcare costs
Health insurance premiums paid for the child and work-related childcare expenses are added to the basic obligation before it is divided between parents.
4. Divide proportionally based on income share
The total obligation is allocated between the parents in proportion to each parent's share of combined income. The parent with the higher income share bears a larger portion of the obligation.
5. Apply parenting time credits
Parenting time percentage — 35%+ triggers a parenting time adjustment on Form 14 parenting time adjustment when the non-primary parent exercises 35% or more of the overnights (approximately 128 nights).
Document Everything for Your Missouri Case
Missouri courts rely on documented records — parenting time logs, expense receipts, and payment histories. ReplyCalmly helps you track all of it and generate organized, exportable reports.
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