Support in Idaho

How Idaho Calculates Child Support

Idaho uses an income shares model established under the Idaho Child Support Guidelines (Idaho Rules of Civil Procedure, Rule 126). The model is based on the economic principle that children should receive the same proportion of parental income they would have received had the family remained intact.

The calculation begins with each parent’s gross income, which includes wages, salaries, commissions, bonuses, self-employment income, Social Security benefits, workers’ compensation, unemployment compensation, pensions, dividends, interest, trust income, rental income, and other recurring earnings. Courts may impute income to a parent who is voluntarily unemployed or underemployed without reasonable cause.

After determining gross income, certain adjustments are made, including deductions for taxes and pre-existing child support or spousal maintenance obligations. The parents’ adjusted incomes are combined, and the guidelines schedule identifies the basic support obligation based on the combined income and the number of children. Each parent’s share of the obligation is proportional to their percentage of the combined income. Work-related child care costs and health insurance premiums for the child are added and apportioned similarly.

For a general overview of income shares models, see our guide on how child support is calculated. You can also estimate your potential obligation with our child support calculator.

Deviations from the Guidelines

The Idaho guidelines create a rebuttable presumption that the calculated amount is correct. However, the court may deviate from the guidelines if strict application would be unjust or inappropriate. Recognized grounds for deviation include:

• Shared or split physical custody arrangements
• Extraordinary medical expenses not covered by insurance
• Extraordinary educational expenses
• The needs of other dependents of either parent
• Tax planning considerations that benefit the child
• Any other factor the court deems relevant to the best interests of the child

Any deviation must be accompanied by a written finding explaining why the guidelines amount is inappropriate.

Modifying or Terminating Child Support

Either parent may petition for modification by demonstrating a material and substantial change of circumstances that is permanent and relates to the needs of the child or the ability of either parent to pay. Idaho also allows modification when the existing order deviates significantly from the current guidelines amount.

Child support in Idaho generally continues until the child turns 18, or until age 19 if the child is still attending high school. Support terminates upon the child’s marriage, emancipation, or entry into military service. Idaho courts do not typically order parents to pay for post-secondary education expenses.

Enforcement of Child Support Orders

Idaho’s Department of Health and Welfare, through the Child Support Program, and the courts enforce child support orders through multiple methods:

• Income withholding from wages
• Interception of state and federal tax refunds
• Suspension of driver’s licenses and professional or recreational licenses
• Liens on real and personal property
• Contempt of court proceedings
• Passport denial for arrearages exceeding $2,500
• Credit bureau reporting

Arrearages accrue interest and cannot be retroactively reduced. Any modification takes effect from the date the petition is filed.

Spousal Maintenance in Idaho

Idaho law authorizes spousal maintenance under Idaho Code Section 32-705 but does not use a formula to calculate it. The court exercises broad discretion, and maintenance is available only when the requesting spouse demonstrates both a need for support and a lack of sufficient property to provide for their own reasonable needs.

The primary types of maintenance include:

• Temporary maintenance. Support during the pendency of the divorce proceedings.
• Rehabilitative maintenance. Support for a defined period to allow a spouse to acquire education, training, or work experience to become self-supporting.
• Transitional maintenance. Short-term support to help a spouse adjust to post-divorce financial circumstances.
• Permanent maintenance. Ongoing support in cases where the spouse cannot become self-supporting due to age, health, or other factors, typically awarded after long marriages.

Factors in Maintenance Determinations

Idaho courts consider the following factors under Idaho Code Section 32-705:

• The financial resources of the party seeking maintenance, including marital property apportioned to that party
• The time necessary to acquire education or training for appropriate employment
• The duration of the marriage
• The age and physical and emotional condition of the spouse seeking maintenance
• The ability of the other spouse to meet their own needs while paying maintenance
• The tax consequences to each party
• The fault of either party

Fault in the breakdown of the marriage may be considered by Idaho courts when determining maintenance, though it is one of many factors and is not necessarily dispositive.

When to Seek Legal Guidance

Idaho’s income shares model for child support and its discretionary approach to spousal maintenance both involve fact-intensive analyses that benefit from professional guidance. If you are evaluating a child support calculation or considering a maintenance claim, schedule a free consultation with an experienced Idaho family law attorney.

Statutes referenced: Idaho Rules of Civil Procedure Rule 126 (child support guidelines); Idaho Code Sections 32-705 through 32-709 (spousal maintenance).