Child Support Estimate Calculator accuracy and testing

Formula source

• Estimated support = max(0, adjusted monthly need * Parent B income share - overnight adjustment - direct payment credits), where overnight adjustment = base support * Parent B overnight percent * user-entered adjustment rate.

Test cases

Known limitations

• This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
• Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

• This is a planning and organization estimate only, not legal advice or court guidance.
• The calculator does not replace a family-law attorney, mediator, court order, or official state calculator.
• Inputs are processed locally in the browser and are not stored by Calwarden.

Unit handling

• Parent A Monthly Income accepts values in $.
• Parent B Monthly Income accepts values in $.
• Monthly Child Cost/Need accepts values in $.
• Monthly Childcare Cost accepts values in $.
• Monthly Insurance Cost accepts values in $.
• Parent B Overnight Percentage accepts values in %.
• Overnight Adjustment Rate accepts values in %.
• Direct Payment Credits accepts values in $.
• Estimated Monthly Support is displayed as currency.
• Parent B Income Share is displayed as a percentage.
• Adjusted Monthly Need is displayed as currency.
• Overnight Adjustment is displayed as currency.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Currency outputs are displayed with standard US dollar formatting.
• Percent outputs are displayed with two decimal places.
• Input precision follows configured step values where provided.

Version history

Change log