Reviewed August 2026
Child Support in Idaho
Idaho calculates child support with the Idaho Child Support Guidelines. This is an income shares model built into the state's Standard Child Support Worksheet under the Idaho Rules of Family Law Procedure. The worksheet adds both parents' monthly income together. It then calculates each parent's percentage share of that combined income. The state's schedule sets a basic child support obligation, which the worksheet divides between the parents. Idaho's district courts hear child support cases through their magistrate divisions. This applies to cases filed as part of a divorce, a paternity action, or a standalone petition. The Idaho Department of Health and Welfare's Child Support Services program helps parents apply for services and enforce existing orders.
Virdix's document-preparation product currently prepares divorce paperwork for California and Florida cases. This page explains how child support works under Idaho law for people researching before they file. It is not legal advice, and Virdix does not prepare or file Idaho paperwork. See how Virdix works for California divorces.
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The income shares worksheet
The Standard Child Support Worksheet comes from the Idaho Rules of Family Law Procedure. It starts with each parent's monthly income under the Idaho Child Support Guidelines. The two figures are added together for a combined total. The worksheet calculates each parent's percentage share of that combined income. It then applies the combined income to Idaho's Child Support Schedule to find the basic child support obligation. That obligation is split between the parents in proportion to their income shares. The worksheet must be filed with the district court in any case that establishes or changes support.
Applying for services
The Idaho Department of Health and Welfare runs the state's Child Support Services program, Idaho's IV-D agency. A parent can apply through the department to establish paternity, set up a new support order, or collect and enforce an order that already exists. The department represents the state's interest in these cases, not either parent individually.
Who hears an Idaho child support case
Idaho's district courts, generally through their magistrate divisions, hear child support matters. This covers cases from divorce, paternity, and standalone support petitions. Filings, including the Standard Child Support Worksheet and the supporting income affidavit, go through the district court for the county where the case is filed.
Modifying an existing order
An Idaho child support order can be modified when a parent shows a substantial and material change in circumstances since the order was entered. This commonly includes a significant change in either parent's income, a change in custody or parenting time, or a change in the child's needs. A parent seeking a modification files an updated Standard Child Support Worksheet with current income for the court to review.
Enforcement tools
Idaho's Child Support Services program can pursue income withholding directly from a paying parent's wages. It can also intercept state and federal tax refunds from a parent who falls behind. A parent who ignores a district court support order can be held in contempt of court. Unpaid support keeps accruing as arrears, and those arrears remain legally collectible.
Sources: Idaho Rules of Family Law Procedure, Standard Child Support Worksheet (Form 6), Idaho Courts, Rules of Family Law Procedure page, Idaho Department of Health and Welfare, Child Support
Not independently confirmed
- Exact numeric modification threshold (percentage variance) in the current Idaho Child Support Guidelines rule text
- Whether Idaho's self-help center currently publishes a standalone online child support calculator
Child Support in Idaho: frequently asked questions
Does Idaho use the income shares model for child support?+
Yes. The Idaho Child Support Guidelines combine both parents' monthly income. They calculate each parent's percentage share of that combined income. That figure is applied to the state's Child Support Schedule to set a basic obligation. The Standard Child Support Worksheet then divides that obligation between the parents.
How do I apply for child support services in Idaho?+
You apply through the Idaho Department of Health and Welfare's Child Support Services program, the state's IV-D agency. The department can help establish paternity, set up a new support order, or collect and enforce an order that already exists.
What court hears child support cases in Idaho?+
Idaho's district courts, generally through their magistrate divisions, hear child support matters. This is true whether the case comes from a divorce, a paternity action, or a standalone petition. Filings go through the district court for the county where the case is brought.
When can I modify my Idaho child support order?+
You generally need to show a substantial and material change in circumstances since the last order. This can include a significant change in either parent's income, custody, or the child's needs. You file an updated Standard Child Support Worksheet with current income for the court to review.
What happens if a parent stops paying child support in Idaho?+
Idaho's Child Support Services program can pursue income withholding and intercept state and federal tax refunds from a parent who falls behind. A parent can also be held in contempt of court. Unpaid support remains collectible as arrears.
Is there an official Idaho child support worksheet?+
Yes. The Idaho Rules of Family Law Procedure include a Standard Child Support Worksheet, Form 6, that walks through the income shares calculation. The Idaho Supreme Court's website publishes it for use in every case establishing or changing support.
This page is general information about child support in Idaho, not legal advice for your situation. Laws, fees, and procedures change over time; confirm current details with Idaho's own courts before relying on anything here. Virdix is not a law firm and is not licensed to practice law in Idaho. Virdix does not prepare or file Idaho divorce paperwork. It is not a substitute for an attorney licensed in Idaho.
More Idaho divorce guides
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