Quick answer: Missouri uses an income-shares worksheet, Form No. 14, required by Supreme Court Rule 88.01. A new Form 14 and an updated Schedule of Basic Child Support Obligations (the 2024 Child Support Guideline Review) took effect on January 1, 2026. Each parent’s monthly gross income is adjusted for maintenance and other support, the schedule gives a basic child support amount for the combined income and the number of children (one to six, up to $40,000 a month), child care, health insurance and other agreed costs are added, and the total is divided by each parent’s share of the income. The parent paying support gets credit for the additional costs he or she pays and an overnight adjustment of 6% to 34% of the basic amount. The result is a rebuttable presumption.
How Form 14 works
- Adjusted income. Lines 1 to 3: gross income, maintenance received or paid, other child support orders and other children in the home.
- Basic amount. Lines 4 and 5: each parent’s share and the schedule amount. See how Missouri calculates child support.
- Additional costs. Lines 6 to 10: child care, health insurance and other costs. See low income and additional costs.
- Overnight adjustment. Line 11. See the overnight adjustment.
- Presumed amount. Line 12: the paying parent’s share less the credits.
What this calculator checks
The calculator uses the official 2026 schedule and the worksheet steps, and was checked against an independent re-implementation. The child care tax credit is not calculated: enter child care after the credit. Deviations, the court’s adjustments above 34% and income above $40,000 a month are not included.
Child support across Missouri
Form 14 applies in every Missouri circuit court, from Kansas City, St. Louis, Springfield, Columbia, Independence or Lee’s Summit, and in administrative proceedings. The court must find the presumed amount unjust or inappropriate, with findings, before it departs from it.
Frequently asked questions
How is child support calculated in Missouri?
With Form 14: each parent's adjusted gross income, the basic amount from the schedule for the combined income and number of children, additional costs, each parent's share, and credits for costs paid and overnights.
What changed in Missouri child support in 2026?
A new Form 14 and an updated Schedule of Basic Child Support Obligations from the 2024 guideline review took effect on January 1, 2026.
Who pays child support when time is equal in Missouri?
It is a rebuttable presumption that the parent with the higher gross monthly income pays, unless evidence shows the other parent is responsible for the non-duplicated fixed expenses.
What is the Missouri overnight adjustment?
A credit of 6% to 34% of the basic child support amount, based on the overnights the paying parent has the children, subject to income conditions.
What is the highest income in the Missouri schedule?
$40,000 of combined adjusted monthly gross income; above that the court considers the case separately.