Answer Capsule
The Kansas child support calculator uses the income shares model established under K.S.A. 23-3001 and the Kansas Child Support Guidelines adopted by the Kansas Supreme Court pursuant to K.S.A. 20-165. Both parents' gross incomes are combined, a base support obligation is drawn from the guidelines schedule, and each parent's share is proportioned by income percentage. The Kansas Supreme Court updated these guidelines effective July 1, 2025, via Administrative Order 2025-RL-121. Kansas courts require every filing party to submit a completed Child Support Worksheet alongside a Domestic Relations Affidavit under K.S.A. 23-3002.
| Key Fact | Detail |
|---|---|
| Calculation Model | Income Shares (both parents' incomes combined) |
| Governing Statute | K.S.A. 23-3001 through K.S.A. 23-3005 |
| Guidelines Authority | Kansas Supreme Court, K.S.A. 20-165 |
| Divorce Filing Fee | $195 (as of March 2026; verify with your local clerk) |
| Residency Requirement | 60 days in Kansas before filing (K.S.A. 23-2703) |
| Waiting Period | 60 days after filing before finalization (K.S.A. 23-2708) |
| Support Terminates | Age 18 (or June 30 of the school year if still in high school) |
| Modification Threshold | 10% change in calculated support amount |
| Parenting Time Credit | Available when noncustodial parent has more than 35% overnights |
| Guidelines Last Updated | July 1, 2025 (Administrative Order 2025-RL-121, issued October 3, 2025) |
What Is the Kansas Child Support Calculator and How Does It Work?
The Kansas child support calculator is a tool that applies the income shares formula mandated by the Kansas Child Support Guidelines to estimate monthly support obligations. Under K.S.A. 23-3002, Kansas courts must follow the guidelines adopted by the Supreme Court, which combine both parents' domestic gross incomes to determine the total child support obligation from a standardized schedule. Each parent's proportionate share is then calculated based on their percentage of combined income.
The income shares model reflects the principle that children should receive the same proportion of parental income they would have received if the household remained intact. Kansas adopted this model because economic research shows that two-parent households spend a predictable percentage of combined income on child-rearing expenses. The guidelines schedule accounts for the number of children and the age categories of those children, with higher support amounts assigned to children aged 12 through 18.
Kansas breaks children into two age categories for calculating support: children aged 0 through 11 and children aged 12 through 18. The guidelines schedule lists combined monthly support obligations ranging from approximately $234 per month at a combined income of $800 per month for one child, up to several thousand dollars per month at higher income levels. For combined monthly incomes exceeding the top of the schedule, courts have discretion to set support at an amount consistent with the child's demonstrated needs.
How Do You Calculate Child Support in Kansas Step by Step?
Kansas child support is calculated using the official Child Support Worksheet, a multi-section form that walks through income determination, adjustments, the guidelines schedule lookup, and allocation of the obligation between parents. Every person filing a motion for child support or modification must submit this completed worksheet to the court under K.S.A. 23-3002.
The Kansas Child Support Worksheet follows these sections in order:
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Section A covers each parent's gross income from all sources, including wages, salaries, commissions, bonuses, self-employment income, investment income, rental income, Social Security benefits, workers' compensation, unemployment insurance, and disability benefits.
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Section B identifies income sources and verifies employment status for both parents. If a parent is voluntarily unemployed or underemployed, the court may impute income at the level the parent could earn based on education, work history, and job market conditions.
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Section C calculates Domestic Gross Income adjustments. Line C.1 establishes each parent's domestic gross income. Line C.2 deducts court-ordered child support paid for other children. Line C.3 deducts court-ordered maintenance (alimony) paid. Line C.4 adds court-ordered maintenance received. Line C.5 produces the adjusted Child Support Income for each parent.
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Section D combines both parents' adjusted incomes and looks up the base child support obligation from the guidelines schedule based on combined monthly income and the number and ages of children.
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Section E allocates the base obligation proportionally. If Parent A earns 60% of the combined income and Parent B earns 40%, Parent A is responsible for 60% of the total child support obligation.
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Section F applies additional adjustments for child care costs, health insurance premiums for the children, and extraordinary medical expenses. These costs are divided between parents in the same income proportion established in Section E.
What Income Is Included in the Kansas Child Support Worksheet?
Kansas defines domestic gross income broadly to include virtually all sources of revenue a parent receives. Under the Kansas Child Support Guidelines, gross income encompasses wages, salaries, tips, commissions, bonuses, overtime pay, self-employment earnings (gross receipts minus ordinary business expenses), military pay and allowances, investment income (interest, dividends, capital gains), rental income, trust income, Social Security benefits, workers' compensation benefits, unemployment insurance benefits, disability insurance benefits, spousal maintenance received, and annuity payments.
Income sources that are specifically excluded from the Kansas child support calculation include means-tested public assistance benefits such as Temporary Assistance for Needy Families (TANF), Supplemental Nutrition Assistance Program (SNAP) benefits, and Supplemental Security Income (SSI). Child support received for children from other relationships is also excluded from gross income.
When a parent is self-employed, Kansas courts examine gross business receipts minus reasonable and necessary business expenses. Depreciation claimed on tax returns is scrutinized closely because the guidelines treat accelerated depreciation as a non-cash expense that should be added back to income. If a self-employed parent's reported income appears inconsistent with their lifestyle, the court may impute a higher income level based on available evidence.
What Adjustments Does Kansas Allow to Child Support Income?
Kansas permits three primary adjustments to domestic gross income before calculating child support obligations. Court-ordered child support currently being paid for children from other relationships is deducted from gross income under Line C.2 of the worksheet. Court-ordered spousal maintenance (alimony) being paid to a former spouse or the other parent is deducted under Line C.3. Spousal maintenance received from any source is added to income under Line C.4.
These adjustments reflect the principle that a parent's available income for supporting children in the current case should account for pre-existing legal obligations. The adjustments only apply to court-ordered obligations that are actually being paid. Voluntary payments, informal arrangements, and arrearages do not qualify for deduction. The resulting figure on Line C.5, called Child Support Income, is the number used to look up the base obligation in the guidelines schedule.
Kansas courts may also deviate from the guidelines amount by up to 5% without making specific findings on the record. Deviations beyond 5% require the court to state the amount that would have been ordered under the guidelines and to explain why that amount would be unjust or inappropriate. Common reasons for deviation include extraordinary medical expenses, special educational needs, travel costs for long-distance parenting time, and significant independent income or assets of the child.
How Does Parenting Time Affect the Kansas Child Support Calculator?
Kansas reduces child support obligations when the noncustodial parent exercises more than 35% of annual parenting time, which equates to approximately 128 overnights per year. This parenting time adjustment recognizes that a parent who has the child for extended periods incurs direct child-rearing expenses during that time. The adjustment is not automatic and requires documentation of the actual parenting time schedule.
The Kansas Child Support Guidelines provide two methods for shared parenting time adjustments. The Shared Expense Formula applies when parents agree on how to split direct expenses like clothing, school supplies, and activity fees. The Direct Expense Formula applies when parents do not agree on splitting direct expenses and one parent pays all such costs. Courts select the appropriate formula based on the parenting plan filed with the court.
For a practical example, consider two parents with a combined monthly income of $8,000 and one child aged 10. If the noncustodial parent earns 40% of the combined income ($3,200 per month) and has the child 40% of overnights (146 nights per year), the parenting time adjustment would reduce the noncustodial parent's monthly obligation compared to the standard calculation. The precise reduction depends on which shared expense formula the court applies and the documented direct expenses for the child.
Parenting time below the 35% threshold does not trigger any adjustment under Kansas guidelines. A noncustodial parent with every-other-weekend visitation (approximately 26% of overnights) receives no parenting time credit.
When Does Child Support End in Kansas?
Child support in Kansas terminates when a child reaches age 18, but the obligation extends through June 30 of the school year in which the child turns 18 if the child is still attending high school. Under K.S.A. 23-3001, if a child remains a bona fide high school student after that June 30 date, the court may extend support through the school year in which the child turns 19, provided the parents jointly participated in or knowingly acquiesced to the delay in completing high school.
A bona fide high school student is defined as a student enrolled in full accordance with the policy of an accredited high school while pursuing a diploma or GED. The guidelines schedule for children aged 12 through 18 applies to these extended support calculations. Kansas law does not require parents to pay child support through college; however, parents may voluntarily agree in a written separation agreement approved by the court to continue support beyond age 18 for post-secondary education.
Child support also terminates upon a child's marriage, entry into active military duty, or legal emancipation by court order. If a parent has a support obligation for multiple children, the obligation does not simply divide proportionally when one child emancipates. The remaining obligation must be recalculated using the guidelines schedule for the reduced number of children, which typically results in a higher per-child amount than the previous calculation.
How Do You Modify a Kansas Child Support Order?
Kansas permits modification of child support orders when a material change in circumstances produces at least a 10% change in the calculated support amount under K.S.A. 23-3005. Within three years of the original order or last modification, the filing parent must demonstrate this material change. After three years, a parent may request modification without proving changed circumstances, and the court will simply recalculate support under current guidelines and incomes.
Common grounds for modification in Kansas include a permanent increase or decrease of 10% or more in either parent's income, loss of employment (involuntary), changes in the child's health insurance costs, changes in child care expenses, changes in the parenting time schedule, the emancipation of one child when multiple children remain, and changes to the Kansas Child Support Guidelines themselves. The October 2025 guideline update (Administrative Order 2025-RL-121) could itself trigger modifications for existing orders where recalculation produces a 10% or greater change.
To file for modification, a parent submits a Motion to Modify Child Support to the court that issued the original order, along with an updated Domestic Relations Affidavit, a proposed Child Support Worksheet reflecting current incomes and circumstances, and the $39 motion filing fee (as of March 2026; verify with your local clerk). The Kansas Department for Children and Families (DCF) Child Support Services can also initiate reviews for families receiving enforcement services.
| Modification Factor | Example | Effect on Support |
|---|---|---|
| Income increase (10%+) | Paying parent gets $800/month raise | Support obligation increases proportionally |
| Job loss (involuntary) | Paying parent laid off | May reduce support; court may impute income |
| Parenting time change | Schedule shifts from 20% to 40% overnights | Triggers parenting time credit |
| Child care cost change | Daycare expense drops by $400/month | Reduces total obligation |
| Health insurance change | Employer plan premium doubles | Adjusts insurance allocation |
| Child emancipation | Oldest of 3 children turns 18 | Recalculate for 2 children |
| Guideline update | 2025 schedule produces different amount | 10% change triggers modification |
What Are the Costs of Filing for Child Support in Kansas?
The filing fee for a divorce petition in Kansas is $195 as of March 2026, which includes the initial child support determination. A standalone motion to establish child support outside of a divorce action carries a separate filing fee. Process server fees for serving the other parent range from $15 to $50 depending on the county. Parents who cannot afford filing fees may apply for a fee waiver based on financial hardship.
Beyond court costs, parents should budget for completing the required Domestic Relations Affidavit and Child Support Worksheet. While these forms are available for free on the Kansas Courts website (kscourts.gov), many parents use professional child support calculation software or hire attorneys to ensure accuracy. Attorney fees for child support matters in Kansas range from $200 to $350 per hour, with uncontested support agreements costing approximately $1,500 to $3,000 in total legal fees and contested support hearings costing $3,000 to $10,000 or more.
Kansas courts can order one parent to contribute to the other parent's attorney fees under K.S.A. 23-2715 when there is a significant disparity in the parties' financial resources. Parents receiving services through DCF Child Support Services may have support established or modified at no cost through the administrative process.
How Does Kansas Handle Imputed Income for Unemployed Parents?
Kansas courts impute income to a parent who is voluntarily unemployed or underemployed, meaning the court assigns an earning capacity based on the parent's education, work history, job skills, and prevailing wage rates in the local job market. The imputed income is then used in the child support calculator as if the parent were actually earning that amount. Kansas courts have consistently held that a parent cannot reduce their support obligation by choosing not to work or by accepting employment substantially below their demonstrated earning capacity.
The burden of proving voluntary unemployment or underemployment falls on the parent requesting imputation. Evidence may include the unemployed parent's employment history, educational credentials, certifications, age, physical and mental health status, job search efforts (or lack thereof), and local labor market conditions. If a parent left a $75,000 per year position to pursue a career that pays $30,000 per year without reasonable justification, the court may impute income at the $75,000 level.
Kansas courts do recognize legitimate reasons for reduced income, including documented disability, enrollment in education or training programs that will increase future earning capacity, and caregiving responsibilities for a very young child (typically under age 2). In these cases, courts may decline to impute income or may impute at a reduced level. The determination is highly fact-specific and falls within the court's discretion.
What Tools Can You Use to Calculate Kansas Child Support in 2026?
The official Kansas Child Support Worksheet is available as a downloadable PDF from the Kansas Courts website at kscourts.gov. This is the form that must be filed with any child support motion under K.S.A. 23-3002, and it reflects the current guidelines schedule adopted by the Kansas Supreme Court. Parents can complete the worksheet manually by following the line-by-line instructions provided with the form.
Several online child support calculator tools can estimate Kansas child support obligations before completing the official worksheet. The Divorce.law Kansas Child Support Calculator provides an interactive estimator that applies the current Kansas income shares formula, accepts inputs for both parents' incomes, number and ages of children, child care costs, and health insurance premiums. Third-party software tools from Bradley Software and eFamilyTools are used by many Kansas attorneys and courts to produce official worksheet calculations.
Important disclaimer: No online child support calculator produces a legally binding result. The calculator provides estimates based on the inputs entered, but Kansas courts have discretion to deviate from guidelines amounts by up to 5% without specific findings and by greater amounts with stated justification. Actual child support orders depend on the specific facts presented to the court, including evidence of income, parenting time, and the children's needs.
Frequently Asked Questions
How is child support calculated in Kansas?
Kansas calculates child support using the income shares model under K.S.A. 23-3001. Both parents' domestic gross incomes are combined, the base obligation is found in the guidelines schedule by income level and number of children, and each parent pays their proportionate share. The Kansas Supreme Court updated these guidelines effective July 1, 2025.
What is the Kansas child support worksheet?
The Kansas child support worksheet is a court-mandated form required under K.S.A. 23-3002 for every child support filing. The worksheet contains sections for gross income (Section A-B), income adjustments (Section C), guidelines schedule lookup (Section D), proportional allocation (Section E), and additional expenses like child care and health insurance (Section F).
Can I use an online child support calculator for Kansas?
Yes, online tools like the Divorce.law Kansas Child Support Calculator can estimate your obligation using the Kansas income shares formula. However, no online child support calculator Kansas tool produces a legally binding result. Courts require the official Child Support Worksheet filed with a Domestic Relations Affidavit, and judges retain discretion to deviate up to 5% without specific findings.
What income counts for Kansas child support?
Kansas includes virtually all income sources: wages, salaries, bonuses, commissions, self-employment earnings, investment income, rental income, Social Security benefits, workers' compensation, unemployment insurance, disability benefits, and spousal maintenance received. Excluded sources include TANF, SNAP benefits, and SSI. Self-employed parents must report gross receipts minus ordinary business expenses.
How much does it cost to file for child support in Kansas?
The divorce filing fee in Kansas is $195 as of March 2026, which includes the initial child support determination. Process service costs an additional $15 to $50. A motion to modify existing child support costs approximately $39 in filing fees. Fee waivers are available for parents demonstrating financial hardship. Verify current fees with your local district court clerk.
At what age does child support end in Kansas?
Child support in Kansas terminates at age 18 under K.S.A. 23-3001. If the child is still in high school at 18, support continues through June 30 of that school year. Courts may extend support through the school year when the child turns 19 if the child remains a bona fide high school student and the parents participated in decisions that delayed graduation.
How do I modify child support in Kansas?
Under K.S.A. 23-3005, Kansas allows modification when a material change produces a 10% or greater change in the calculated support amount. Within 3 years of the current order, you must prove the material change. After 3 years, no showing of changed circumstances is required. File a Motion to Modify with an updated worksheet and Domestic Relations Affidavit.
Does parenting time reduce child support in Kansas?
Kansas reduces child support when the noncustodial parent has more than 35% of annual overnights (approximately 128 nights per year). Below 35%, no parenting time credit applies. The guidelines provide two adjustment formulas: the Shared Expense Formula (when parents agree on splitting direct costs) and the Direct Expense Formula (when they do not agree).
What happens if a parent refuses to pay child support in Kansas?
Kansas enforces child support through income withholding orders, tax refund intercepts, professional license suspension, driver's license suspension, passport denial for arrearages exceeding $2,500, contempt of court proceedings (up to 6 months in jail), and property liens. The Kansas DCF Child Support Services division handles enforcement for families enrolled in their program at no cost.
Can Kansas courts deviate from the child support guidelines?
Kansas courts may deviate up to 5% from the guidelines amount without making specific findings on the record. Deviations exceeding 5% require the court to state the guidelines amount and explain why that amount would be unjust or inappropriate. Common deviation reasons include extraordinary medical needs, special education expenses, long-distance travel costs for parenting time, and a child's independent income or assets.