Indiana Child Support Laws (2026): How Payments Are Calculated, Modified, and Enforced

Fritch Law Office, P.C. · Jasper, Indiana · 2026 · Family Law · fritchlaw.com

Child support is one of the most frequently misunderstood and most hotly contested areas of Indiana family law. Whether you are the parent receiving support or the parent ordered to pay it, understanding exactly how Indiana calculates, modifies, and enforces child support is essential to protecting your rights and your child’s financial wellbeing.

Indiana child support is governed by Indiana Code § 31-16-6-1 and the Indiana Child Support Guidelines, adopted by the Indiana Supreme Court. These guidelines apply statewide - in every county, in every court - and judges must follow them unless specific circumstances justify a deviation. This guide explains the complete child support system in Indiana as it stands in 2026.

What Is Child Support and Who Pays It?

Child support is a court-ordered financial obligation requiring one parent to contribute to the costs of raising a child. In Indiana, child support is not a punishment or a reward - it is a legal recognition that both parents share financial responsibility for their children, regardless of their relationship status or custody arrangement.

Either parent can be ordered to pay child support depending on the custody arrangement and each parent’s income. The parent who has the child for fewer overnights per year is typically the “paying parent,” while the parent with more parenting time is typically the “custodial parent” who receives support. However, even in joint physical custody arrangements where parenting time is equal, one parent may still owe support if there is a meaningful income difference between the two.

How Indiana Calculates Child Support: The Income Shares Model

Indiana uses the Income Shares Model under Indiana Code § 31-16-6-1 to calculate child support. This model is based on the principle that a child should receive the same proportion of each parent’s income they would have received if the parents had remained together in an intact household.

Rather than looking at only the paying parent’s income, the Income Shares Model considers both parents’ adjusted gross incomes and divides the total child-rearing obligation proportionally between them.

Step 1: Determine Each Parent’s Gross Income

Gross income for child support purposes is broadly defined and includes wages, salaries, overtime, bonuses, commissions, self-employment income after reasonable business expenses, rental income, investment income, pensions, Social Security benefits, disability benefits, and unemployment compensation.

The following are excluded from gross income: means-tested public assistance such as TANF, Supplemental Security Income (SSI), and Food Stamps (SNAP); income of the parent’s new spouse; and child support received for children from prior relationships.

Step 2: Calculate Each Parent’s Adjusted Gross Income (AGI)

Allowable deductions include existing court-ordered child support obligations for other children, court-ordered spousal maintenance, and health insurance premiums paid for the child.

Step 3: Calculate Combined Weekly AGI and Each Parent’s Percentage Share

Indiana uses weekly income figures. Each parent’s percentage share is calculated by dividing their AGI by the combined total.

Step 4: Apply the Basic Child Support Obligation from the Schedule

The Basic Child Support Obligation is taken from the official schedule table based on combined weekly AGI and number of children. Additional costs, including childcare and health insurance, are added and divided proportionally.

Step 5: Apply the Parenting Time Credit

The noncustodial parent receives a parenting time credit that increases with more overnights, starting at 52 overnights per year. In equal parenting time, support can be significantly reduced or reversed based on income.

Healthcare Costs and Childcare Expenses

Health insurance premiums for the child’s portion and work-related childcare costs are added to the basic obligation and divided proportionally. Uninsured medical expenses are also split according to each parent’s income share. The old 6% rule was eliminated in 2024.

When Does Child Support End in Indiana?

Under Indiana Code § 31-16-6-6, child support ends when the child turns 19. Support may end earlier in cases of marriage, military service, emancipation, or self-support. Support can continue beyond 19 if the child is incapacitated or still in high school.

College Expenses and Post-Secondary Educational Support

Courts may order parents to contribute to college expenses under IC § 31-16-6-2, but the petition must be filed before the child turns 19.

How to Modify a Child Support Order in Indiana

Modification is possible through:

• Substantial and continuing change in circumstances: This may include job loss, income change, parenting time change, or other major financial or family changes.
• The 20% Rule: If the current order differs by more than 20% from the current guideline amount after 12 months, modification may be appropriate.

Child Support Enforcement in Indiana

Enforcement tools include wage garnishment, tax refund intercepts, license suspension, passport denial, credit reporting, contempt of court, and property liens. Arrears accrue interest at 18% per year and remain enforceable indefinitely.

When Courts Deviate From the Child Support Guidelines

Courts may deviate only with written findings that the guideline amount is unjust or inappropriate.

Final Thoughts on Indiana Child Support Laws

Knowing how Indiana child support laws work — and reviewing your order whenever your income or parenting time changes — is the best way to protect both your children and your finances.

Indiana’s child support system is designed to ensure both parents contribute fairly to their children’s needs. Whether establishing, modifying, or enforcing support, experienced legal guidance is highly recommended.