How to Modify Child Support in Kansas
Reviewed by DocDraft Legal Team · Kansas · Last updated September 21, 2026
In Kansas, a child support modification is a court order that changes the amount of an existing child support order after a parent shows a material change in circumstances, and Kansas recognizes a specific trigger: a change that would raise or lower the guideline amount on your worksheet by 10 percent or more (Kansas Child Support Guidelines, Section I.E.2). Child support in Kansas is set by a statewide guideline worksheet adopted by the Kansas Supreme Court, so a change in either parent's income, health coverage, or parenting time can push the current amount 10 percent above or below what the guideline would now produce. You can ask for a change in two ways. You can file a motion to modify in the Kansas district court that issued your order, attaching a domestic relations affidavit and a proposed child support worksheet (K.S.A. 23-3002), or, if Kansas DCF Child Support Services manages your case, you can ask that agency to review it. Timing matters: a modification can take effect only back to the first day of the month following the date you file your motion, not to when your circumstances changed (K.S.A. 23-3005), so support that already came due cannot be reduced. Within three years of an order you must show a material change; after three years you can seek review without one. Keep paying your current order until the court changes it. Attorney review of your filing is available through DocDraft.
Find out where you stand in Kansas
Where are you with changing your child support order?
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How do I modify child support in Kansas?
File a motion to modify in the Kansas district court that issued your order, or ask Kansas DCF Child Support Services to review it. You attach a domestic relations affidavit and a proposed child support worksheet (K.S.A. 23-3002), and you show a material change in circumstances, such as a 10 percent change in the guideline amount.
How much does income have to change to modify child support in Kansas?
Kansas recognizes a 10 percent rule: a change that would raise or lower the guideline amount on Line I.2 of your worksheet by 10 percent or more is a material change of circumstances (Kansas Child Support Guidelines, Section I.E.2). Within three years of the order you must show such a change; after three years you need not.
How far back can a child support change go in Kansas?
A modification can take effect only back to the first day of the month following the date you file your motion to modify, not to when your circumstances changed (K.S.A. 23-3005). Support that already came due cannot be reduced, so filing promptly protects you. Keep paying the current order until a judge changes it.
Which court handles child support modifications in Kansas?
The Kansas district court that issued your existing order handles modifications and keeps continuing jurisdiction over it. If Kansas DCF Child Support Services manages your case, you can also ask that agency to review the order and, if warranted, take a modification to the district court. Both paths apply the state guideline worksheet.
Kansas child support modification at a glance
In Kansas, a child support modification is a court changing an existing support order after a parent shows a material change in circumstances. Kansas recognizes a 10 percent rule: a change that would raise or lower the guideline amount on Line I.2 of the worksheet by 10 percent or more is a material change (Kansas Child Support Guidelines, Section I.E.2). Support is set by a statewide guideline worksheet, so an income change, a shift in health coverage, or a new parenting schedule can justify a new amount. You file a motion to modify in the district court that issued your order, or ask Kansas DCF Child Support Services to review it. A change applies only back to the first day of the month following your filing, so support already due cannot be reduced (K.S.A. 23-3005).
Lowering a Kansas order after a pay cut
Suppose your Kansas order was set two years ago and your hours were just cut, so the guideline worksheet would now produce an amount at least 10 percent lower, a recognized material change of circumstances (Kansas Child Support Guidelines, Section I.E.2). You prepare a motion to modify with a domestic relations affidavit and a proposed child support worksheet showing your lower income (K.S.A. 23-3002), and file it in the district court that issued your order. Because a change takes effect only back to the first day of the month following your filing (K.S.A. 23-3005), you file right away rather than waiting, and you keep paying the current amount until the judge rules. At the hearing the judge recalculates support and signs a lower order. Attorney review of your filing is available through DocDraft.
Relevant Laws
K.S.A. 23-3005 (modification and effective date)
Provides that a child support order may be modified on a showing of a material change in circumstances within three years, and that the court may make a modification of child support retroactive to the first day of the month following the filing of the motion to modify, which fixes the earliest date a change can apply.
K.S.A. 23-3002 (determining child support)
Directs the court to follow the Kansas child support guidelines adopted by the supreme court and requires any person filing a motion for a support order or modification to include a completed domestic relations affidavit and a proposed child support worksheet.
Kansas Child Support Guidelines, Section I.E.2 (10% rule)
The Kansas Supreme Court guidelines state that a change of financial circumstances of the parents or the guidelines which would increase or decrease by 10 percent the amount shown on Line I.2 of the worksheet is a material change of circumstances supporting modification.
Kansas DCF Child Support Services
The Kansas Department for Children and Families runs the state IV-D child support program, which can review an existing order, recalculate support under the guideline, and pursue a modification in district court for the families it serves.
Regional Variances
Kansas child support modification rules at a glance
Qualifying threshold
A material change in circumstances (K.S.A. 23-3005). Kansas recognizes a 10 percent rule: a change that would raise or lower the guideline amount on Line I.2 of the worksheet by 10 percent or more (Kansas Child Support Guidelines, Section I.E.2). Within three years of the order a material change must be shown; after three years it need not.
Where to file
The Kansas district court that issued your existing order, which keeps continuing jurisdiction. If Kansas DCF Child Support Services manages your case, you can also ask that agency to review the order and pursue a modification in district court.
Modification form
Kansas does not designate a single numbered statewide petition. You file a motion to modify child support and must attach a completed domestic relations affidavit and a proposed child support worksheet (K.S.A. 23-3002).
Retroactivity
A modification can take effect only back to the first day of the month following the filing of the motion to modify (K.S.A. 23-3005). Support that already came due cannot be reduced.
Periodic review
Within three years of an order you must show a material change; after three years you can seek review without one. If Kansas DCF Child Support Services handles your case, IV-D cases allow a review about every three years under federal rules.
Suggested Compliance Checklist
Estimate the new guideline amount
Before you file days after startingGather current pay stubs, tax returns, and health coverage costs, and run the Kansas guideline worksheet to see whether the amount on Line I.2 would change by 10 percent or more (Kansas Child Support Guidelines, Section I.E.2). Attorney review of your filing is available through DocDraft.
Prepare the domestic relations affidavit and worksheet
As soon as your circumstances change days after startingDraft a motion to modify child support and complete the domestic relations affidavit and proposed child support worksheet that Kansas requires with the filing (K.S.A. 23-3002). Use the Kansas Judicial Branch guidelines and worksheet to calculate the new amount.
File with the district court
Promptly (the change dates back to the month after filing) days after startingFile your motion and attachments with the clerk of the district court that issued your order, and pay the fee or ask about a waiver. Because a change applies only back to the first of the month after filing, file promptly (K.S.A. 23-3005).
Serve the other parent
After filing, before the hearing days after startingServe the other parent with your filed motion and worksheet following Kansas rules, then file proof of service. Proper notice is required before the judge can change the order at the hearing.
Ask about a DCF agency review
Anytime your case is with the agency days after startingIf Kansas DCF Child Support Services manages your case, ask it to review your order. The agency can recalculate support under the guideline and pursue a modification in district court when a material change is shown.
Attend the hearing and get the new order
On your hearing date days after startingGo to the hearing with your income proof, let the judge recalculate support under the guideline, and get the signed order effective back to the first of the month after you filed. Keep paying the current order until then.
| Task | Description | Document | Days after starting |
|---|---|---|---|
| Estimate the new guideline amount | Gather current pay stubs, tax returns, and health coverage costs, and run the Kansas guideline worksheet to see whether the amount on Line I.2 would change by 10 percent or more (Kansas Child Support Guidelines, Section I.E.2). Attorney review of your filing is available through DocDraft. | - | Before you file |
| Prepare the domestic relations affidavit and worksheet | Draft a motion to modify child support and complete the domestic relations affidavit and proposed child support worksheet that Kansas requires with the filing (K.S.A. 23-3002). Use the Kansas Judicial Branch guidelines and worksheet to calculate the new amount. | - | As soon as your circumstances change |
| File with the district court | File your motion and attachments with the clerk of the district court that issued your order, and pay the fee or ask about a waiver. Because a change applies only back to the first of the month after filing, file promptly (K.S.A. 23-3005). | - | Promptly (the change dates back to the month after filing) |
| Serve the other parent | Serve the other parent with your filed motion and worksheet following Kansas rules, then file proof of service. Proper notice is required before the judge can change the order at the hearing. | - | After filing, before the hearing |
| Ask about a DCF agency review | If Kansas DCF Child Support Services manages your case, ask it to review your order. The agency can recalculate support under the guideline and pursue a modification in district court when a material change is shown. | - | Anytime your case is with the agency |
| Attend the hearing and get the new order | Go to the hearing with your income proof, let the judge recalculate support under the guideline, and get the signed order effective back to the first of the month after you filed. Keep paying the current order until then. | - | On your hearing date |
Frequently Asked Questions
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