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Idaho Child Support Calculator

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To use the child support calculator, select or enter the appropriate information next to each statement.

When you have completed the form, click on the calculate button to get an estimate of the amount of child support that the non-custodial parent will have to pay to the custodial parent in Idaho.

Disclaimer: Please remember that these calculators are for informational and educational purposes only. The amount of child support a court will order for any particular case may be different from the amount estimated by the calculator.

For the most part, these calculators assume that all of the children at issue will primarily live with one parent. They are not intended to estimate child support for joint physical custody or split custody arrangements.

These calculators do not take into account any possible adjustments for children who are not subject to the custody order, but who are living with one of the parents. Finally, these calculators may be based on older or outdated state guidelines or calculations and may not take into consideration state or federal tax implications on income.

These and many other factors can affect a child support order entered by a court.

Idaho Child Support Services

In Idaho, Child Support Services (CSS) – a division of the Department of Health and Welfare – handles matters relating to child support. Idaho law declares that children deserve the economic benefits of both parents even if the family unit is not still together. Designed to protect children of divorce and ensure that they receive the same amount of care as if their parents were still married, CSS can do the legwork to ensure that a non-custodial parent pays child support, among other things.

CSS offers many services to parents. It can help you:

  • Locate a non-custodial parent
  • Establish paternity
  • Establish child support requirements
  • Enforce child support payment
  • Ensure medical support is provided
  • Modify a child support order 

For more information about Idaho child support guidelines in places like Idaho Falls, Meridian, Nampa, Coeur d'Alene, Idaho Falls, Boise, and other places around the state, please visit: On the CSS website, you can set up an online payment, learn about custody and visitation rights, and find forms related to child support, such as:

  • Modification Request form
  • Medical Insurance Information
  • Instructions for Affidavit to Give Credit or Forgive Support
  • Direct Deposit Enrollment form 

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