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Free Missouri child support calculator based on official Missouri state guidelines. Calculate child support obligations using income, custody arrangements, and expenses. Our calculator follows Missouri Child Support Guidelines to provide accurate estimates for legal compliance and family court proceedings.
Last updated: February 2, 2026
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$2,240
+$530
Based on Missouri child support guidelines with primary custody arrangement. Combined monthly income of $8,000 results in a basic obligation of $2,240.
This calculator provides estimates based on Missouri child support guidelines. Actual court-ordered support may vary based on specific circumstances, deviations, and judicial discretion. Consult with a qualified family law attorney for legal advice.
Income percentages
20%, 28%, 32%, 35%, 40%
Fixed percentages based on number of children per Missouri guidelines
Custody types
Primary, Joint, Split
Adjusts calculations based on parenting time and custody arrangements
Additional costs
Child Care + Health Insurance
Factors in additional expenses that affect support calculations
Child count
1-5 Children Supported
Uses specific percentage rates for each number of children
Household adjustments
Reduces Basic Obligation
Adjusts support amounts when other children live in the household
Joint custody benefit
10% Reduction Applied
Missouri automatically reduces support for joint custody arrangements
For parents with $4,500 and $3,500 monthly income, 2 children, primary custody:
Monthly Support
$850
Basic Obligation
$1,100
Missouri child support calculations follow the Missouri Child Support Guidelines, which use a percentage of income model to determine support obligations. The calculation considers both parents' gross monthly income, number of children, custody arrangements, and additional expenses like work-related child care and health insurance.
Basic Obligation = Combined Income × Percentage1 child (20%), 2 children (28%), 3 children (32%), 4 children (35%), 5+ children (40%)Joint Custody: Basic Obligation × 0.90 (10% reduction)Missouri uses fixed percentages based on the number of children, making calculations straightforward and predictable. Joint custody arrangements receive an automatic 10% reduction in support amounts.
Missouri child support calculations consider multiple factors to ensure fair and adequate support for children:
Need help with other legal calculations? Check out our Colorado child support calculator and legal deadline calculator.
Get Legal Calculator for Your PracticeResult: Monthly child support = $850
Based on Missouri guidelines with primary custody arrangement and additional expense adjustments.
Same income, joint custody arrangement
Monthly support: $765 (10% reduction applied)
$6,000 and $4,000 monthly income, 3 children
Monthly support: $1,200 (32% rate applied)
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