A child support order is built on a snapshot — each parent’s income, the parenting-time schedule, what health insurance and childcare cost at the time the court signed it. Life doesn’t stay put. Jobs change, overnights shift, kids’ needs grow. Indiana law allows a support order to be changed, but only in certain situations, and timing matters more than most parents realize. Here is how it works for families in Greene, Monroe, Lawrence and Owen Counties.
The two ways to qualify for a modification
Under Indiana Code 31-16-8-1, a court can modify child support in one of two situations:
- A substantial and continuing change in circumstances that makes the current order unreasonable. “Substantial” means more than a small bump; “continuing” means it isn’t a one-month blip.
- The 20% / 12-month test. You can show that the current order differs by more than 20% from what the Indiana Child Support Guidelines would produce today, and the order you want changed was issued at least 12 months before you file.
The 12-month clock runs from the last order that actually set or changed the support amount (or denied a modification on the merits). An order that only dealt with custody or parenting time doesn’t restart it.
Changes that commonly come up
- A significant, lasting drop or increase in either parent’s income
- A real change in the number of overnights each parent has, which affects the parenting-time credit
- New or ending childcare costs, or a change in who carries the child’s health insurance and what it costs
- A child’s changed needs, such as medical or educational expenses
- Incarceration, which Indiana law specifically says may count as a substantial and continuing change
One caution: if a parent quits a job or takes much lower pay voluntarily, the court can attribute “potential income” to that parent under the Guidelines. A voluntary income drop doesn’t automatically mean lower support.
Don’t wait: support can’t be reduced retroactively
This is the part that costs people the most. Under IC 31-16-16-6, a court generally cannot go back and reduce support payments that already came due and went unpaid. A modification can reach back only to payments that come due after the other parent has been given notice of your petition.
In practice that means:
- If your income drops, file promptly. Every week you wait is a week that stays at the old amount.
- Keep paying what the current order says while your petition is pending. Arrears that pile up in the meantime can’t simply be erased later.
- The same timing works in reverse: if the other parent’s income has gone up significantly and you’re asking for an increase, the change generally can’t reach back before notice of your petition either.
Handshake agreements are risky
Parents sometimes agree between themselves to a new amount — “just pay me $50 less while you’re between jobs.” Even when both mean well, an informal agreement that a court hasn’t approved generally doesn’t change what’s legally owed. If the relationship sours, the full amount under the existing order can still be enforced. If you both agree on a change, put it in writing and submit it to the court for approval.
The 2024 Guidelines update may matter for older orders
The Indiana Child Support Rules and Guidelines were significantly amended effective January 1, 2024. The weekly support schedule was updated to reflect newer data on what families spend on children, and ordinary uninsured health care expenses are now shared between parents according to their incomes instead of through the old “6% rule.” The Guidelines also set out how a parent should document and request reimbursement for those expenses.
If your order was entered before 2024, running a fresh worksheet under the current Guidelines is one way to see whether the 20% test might apply. It won’t in every case — the numbers depend on your family’s facts.
What to gather before you file
- A copy of your current support order and the worksheet it was based on
- Recent pay stubs, tax returns and W-2s or 1099s
- Proof of any job loss, reduced hours, or new job
- Health insurance premium costs for the child
- Childcare invoices or receipts
- Your actual parenting-time calendar, if overnights have changed
- Receipts for uninsured medical, dental or vision expenses
How the process works
A request to change support is made by filing a petition to modify in the court that entered your current order and giving the other parent notice. The court will look at updated financial information and a child support obligation worksheet under the current Guidelines. Many cases resolve by agreement; others go to a hearing where the judge decides whether the legal standard is met and, if so, what the new amount should be. If your case is handled through a county prosecutor’s child support (Title IV-D) office, you can also ask that office about a review of the order.
Talk it through before the gap grows
Because a modification generally can’t reach back before notice of a petition, the cost of waiting is real. If your circumstances have changed, or the other parent’s have, it’s worth getting clear on your options sooner rather than later.
Sutton Law Office handles family law matters, including child support modifications, in Greene, Monroe, Lawrence and Owen Counties. Call 812-269-2641 to schedule a consultation.
This post is general information about Indiana law, not legal advice for your situation. Every case depends on its own facts.