How to Modify Child Support in Kentucky
Reviewed by DocDraft Legal Team · Kentucky · Last updated September 21, 2026
In Kentucky, a child support modification is a court or agency decision that changes the amount of an existing child support order after a parent's circumstances change, up or down. What sets Kentucky apart is a clear signal: when the state guideline, applied to your current situation, would change the monthly amount by 15 percent or more, that change is rebuttably presumed to be a material change in circumstances (KRS 403.213). To modify at all, you must show a material change in circumstances that is substantial and continuing, so a job loss, an income change, or a new parenting schedule can each support a request. Child support in Kentucky is set by a statewide guideline based on both parents' gross income (KRS 403.212), which is what the court recalculates. You can ask in two ways: file a motion to modify in the Circuit or Family Court that issued your order, or ask the Cabinet for Health and Family Services Division of Child Support to review your case. A change reaches back only to installments accruing after you file your motion, not to when your circumstances changed, so support that already came due cannot be reduced (KRS 403.213). Keep paying your current order until a judge changes it. Attorney review of your filing is available through DocDraft.
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How do I modify child support in Kentucky?
File a motion to modify in the Circuit or Family Court that issued your order, or ask the Cabinet for Health and Family Services Division of Child Support to review your case. You must show a material change in circumstances that is substantial and continuing (KRS 403.213), and the court recalculates support under the state guideline.
How much does support have to change to modify child support in Kentucky?
Kentucky uses a 15 percent test. When the state guideline, applied to your current circumstances, would change the monthly amount by 15 percent or more, that is rebuttably presumed to be a material change in circumstances (KRS 403.213). A smaller change is presumed not to qualify, though you can try to rebut that.
How far back can a child support change go in Kentucky?
A modification reaches only installments accruing after you file your motion to modify, not back to when your circumstances changed (KRS 403.213). Support that already came due cannot be reduced, so filing promptly protects you. Keep paying the current order until a judge signs a new one.
Which court handles child support modifications in Kentucky?
The Circuit Court, or the Family Court division where your county has one, handles modifications, specifically the court that issued your original order. If the Cabinet for Health and Family Services Division of Child Support manages your case, you can also ask that agency to review and adjust the order without a full court hearing.
Kentucky child support modification at a glance
In Kentucky, a child support modification is a court or agency decision changing an existing support order after a parent's circumstances change. To modify, you must show a material change in circumstances that is substantial and continuing (KRS 403.213). Kentucky adds a clear numeric signal: if the state guideline, applied to your current situation, would move the monthly amount by 15 percent or more, that is rebuttably presumed to be a material change. Support is set by a statewide guideline based on both parents' gross income (KRS 403.212). You file a motion to modify in the Circuit or Family Court that issued your order, or ask the Cabinet for Health and Family Services Division of Child Support to review your case. A change applies back only to installments accruing after you file, so support already due cannot be reduced.
Lowering a Kentucky order after a pay cut
Suppose your Kentucky order was set two years ago, your hours were cut, and the guideline now produces a monthly amount at least 15 percent lower, which is rebuttably presumed to be a material change (KRS 403.213). You complete a child support guidelines worksheet with your reduced income, draft a motion to modify, and file it in the Circuit or Family Court that issued your order. You have the other parent served and get a hearing date. Because a change reaches back only to installments accruing after you file (KRS 403.213), you file right away and keep paying the current amount until the judge rules. At the hearing the judge recalculates support under the guideline and signs a lower order effective from your filing date. Attorney review of your filing is available through DocDraft.
Relevant Laws
KRS 403.213 (criteria for modification of child support)
Provides that a child support order may be modified only as to installments accruing subsequent to the filing of the motion for modification, upon a showing of a material change in circumstances that is substantial and continuing, and that a 15 percent or greater change in the monthly amount is rebuttably presumed material.
KRS 403.212 (Kentucky child support guidelines)
Sets out Kentucky's statewide child support guidelines and table, defines gross income, and directs the court to calculate support from both parents' incomes; this is the formula that is recalculated when an existing order is modified.
921 KAR 1:400 (establishment, review, and modification of orders)
Kentucky administrative regulation governing the establishment, review, and modification of child support and medical support orders through the Cabinet for Health and Family Services, including the periodic review of orders on request.
Kentucky Cabinet for Health and Family Services: Division of Child Support
The Division of Child Support administers Kentucky's IV-D child support program, including reviewing and adjusting existing orders and, when appropriate, pursuing a modification through the court.
Regional Variances
Kentucky child support modification rules at a glance
Qualifying threshold
You must show a material change in circumstances that is substantial and continuing (KRS 403.213). A 15 percent or greater change in the monthly guideline amount is rebuttably presumed to be a material change; a smaller change is presumed not to qualify.
Where to file
The Circuit Court, or the Family Court division in counties that have one, that issued your original order. If the Cabinet for Health and Family Services Division of Child Support manages your case, you can ask it to review and adjust the order.
Modification form
Kentucky has no single statewide motion-to-modify form. You file a written motion to modify in the Circuit or Family Court with a completed Kentucky child support guidelines worksheet showing current income for both parents.
Retroactivity
A modification reaches only installments accruing after you file your motion, not back to when circumstances changed (KRS 403.213). Support that already came due cannot be reduced.
Periodic review
In agency cases handled by the Division of Child Support, you can generally request a review about every three years without showing a change, and sooner when a material change occurs.
Suggested Compliance Checklist
Confirm and document your changed circumstances
Before you file days after startingCollect current pay stubs, tax returns, and proof of the change, and estimate the new guideline amount to see whether it moves at least 15 percent (KRS 403.213). Attorney review of your filing is available through DocDraft.
Complete the child support guidelines worksheet
As soon as circumstances change days after startingFill out the Kentucky child support guidelines worksheet with both parents' current gross income (KRS 403.212). Kentucky has no single statewide modification form, so this worksheet supports the written motion you will file.
Draft your motion to modify
Before filing days after startingPrepare a written motion asking the Circuit or Family Court to change support, describing the material change in circumstances that is substantial and continuing and attaching the completed guidelines worksheet (KRS 403.213).
File in the Circuit or Family Court
Promptly (the change dates back to filing) days after startingFile your motion with the clerk of the court that issued your order and pay the fee, or ask about a fee waiver. Because a change reaches back only to your filing date, file promptly (KRS 403.213).
Serve the other parent
Before the hearing days after startingHave the other parent formally served with your motion and the hearing notice, then file proof of service. Proper service is required before a judge can change the order at the hearing.
Attend the hearing and get the new order
On your hearing date days after startingGo to the hearing with proof of income and the change, let the judge recalculate support under the guideline, and get the signed order effective back to your filing date. Keep paying the current order until then.
| Task | Description | Document | Days after starting |
|---|---|---|---|
| Confirm and document your changed circumstances | Collect current pay stubs, tax returns, and proof of the change, and estimate the new guideline amount to see whether it moves at least 15 percent (KRS 403.213). Attorney review of your filing is available through DocDraft. | - | Before you file |
| Complete the child support guidelines worksheet | Fill out the Kentucky child support guidelines worksheet with both parents' current gross income (KRS 403.212). Kentucky has no single statewide modification form, so this worksheet supports the written motion you will file. | - | As soon as circumstances change |
| Draft your motion to modify | Prepare a written motion asking the Circuit or Family Court to change support, describing the material change in circumstances that is substantial and continuing and attaching the completed guidelines worksheet (KRS 403.213). | - | Before filing |
| File in the Circuit or Family Court | File your motion with the clerk of the court that issued your order and pay the fee, or ask about a fee waiver. Because a change reaches back only to your filing date, file promptly (KRS 403.213). | - | Promptly (the change dates back to filing) |
| Serve the other parent | Have the other parent formally served with your motion and the hearing notice, then file proof of service. Proper service is required before a judge can change the order at the hearing. | - | Before the hearing |
| Attend the hearing and get the new order | Go to the hearing with proof of income and the change, let the judge recalculate support under the guideline, and get the signed order effective back to your filing date. Keep paying the current order until then. | - | On your hearing date |
Frequently Asked Questions
Other Kentucky guides
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Adverse Possession in Kentucky: Fifteen Years, or Seven With Record Title
Asset Protection Planning in Kentucky (2026)
Dealing With Debt Collectors in Kentucky (2026)
Delinquent Property Taxes in Kentucky: Twelve Percent Interest, and a Fee Stack That Dwarfs It
Expunging a Criminal Record in Kentucky (2026)
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