How to Modify Child Support in Kentucky: Filing Steps and Effective Date
To modify Kentucky child support, file a motion in the court that has your decree. Only installments accruing after the filing can change, and the change must be a material change that is substantial and continuing.
How do you modify child support in Kentucky?
- Run the guideline amount in the Kentucky child support calculator and check the 15% line in the modification calculator.
- File a motion to modify in the court that has your decree (KRS 403.213(1)). Only installments accruing after the filing can change, so file as soon as your circumstances change.
- Serve the other parent and bring current income documents; the guidelines are applied to the parties’ circumstances at the time of the motion.
- Prove a material change that is substantial and continuing, using the 15% presumption if it applies.
- Keep paying the existing order until the court changes it.
Why does the Kentucky filing date matter?
Because the statute lets a decree be modified only as to installments accruing after the filing of the motion. Earlier installments stay as ordered, so a layoff in January and a motion in July leaves six months at the old amount.
Can the Kentucky agency file for me?
An agency substantially contributing to the child’s support may use the guidelines as the basis for updates and modifications (403.213(1)); the guideline rules, including the $60 minimum, are in KRS 403.212. If the Division of Child Support is handling your case, ask whether it will review or file.
What if the paying parent dies?
Support is not terminated by the death of a parent obligated to pay. If the paying parent dies, the amount may be modified, revoked or commuted to a lump-sum payment, to the extent just and appropriate in the circumstances (403.213(3)).
What does the motion need to say?
State the decree and its date, the change in circumstances, the date it began, the guideline amount you calculate and the relief you ask for, and attach current income proof for both parents. The court applies the guidelines to the parties’ circumstances at the time of the motion (KRS 403.213(2)), so the date you file is also the snapshot date.
What if the other parent files first?
The same filing-date rule applies to either parent. If the other parent files a motion to increase support, installments accruing after that filing can change, so gather your own income proof right away.
Who can use the guidelines to update support?
The parent, the custodian or an agency substantially contributing to the child’s support (403.213(1)). That includes the Cabinet in a case where it has been supporting the child.
How is the guidelines table kept current?
A commission reviews the child support guidelines table at least once every four years and recommends changes to the General Assembly (403.213(4)), so a guideline update is one reason to recalculate.
How much does a late motion cost? An example
If you file 3, 6 or 9 months after your change, the relief you lose at a $300 monthly difference is:
| Delay before filing | Relief lost |
|---|---|
| 3 months | $900 |
| 6 months | $1,800 |
| 9 months | $2,700 |
Where do I find the Kentucky guidelines worksheet?
The guidelines statute directs the Cabinet to promulgate a child support obligation worksheet by administrative regulation (KRS 403.212(1)). The Division of Child Support and the circuit clerk can give you the current form.
What happens to unpaid support while the motion is pending?
It stays owed. See how long Kentucky arrears last and add up your balance.
Frequently asked questions
How do I modify child support in Kentucky?
File a motion to modify in the court that has your decree and serve the other parent.
Can Kentucky change support that came due before I filed?
No. Only installments accruing after the filing can be modified.
What happens to Kentucky child support if the paying parent dies?
It does not end automatically; the amount may be modified, revoked or commuted to a lump sum.
Can an agency use the Kentucky guidelines to modify support?
Yes, an agency substantially contributing to the child's support may use them.
How often are the Kentucky guidelines reviewed?
At least once every four years.
Official sources
- KRS 403.213: modification, emancipation and death of a parent
- KRS 403.212: child support guidelines; potential income; $60 minimum
- KRS 360.040: interest on judgments, including child support
- 42 U.S.C. 666(a)(9): no retroactive modification of support already due
A local family law attorney can review your situation — many offer a free consultation.
This is general information, not legal advice. It is based on the cited Kentucky statutes, rules and court opinions, and every case turns on its own facts. Confirm how the law applies to your situation with a licensed Kentucky attorney.