Wyoming allows parents to modify child support when recalculating the obligation under current guidelines produces an amount differing by 20% or more from the existing order, as established in Wyo. Stat. § 20-2-311. The District Court processes all child support modification petitions, with filing fees ranging from $70 to $160 depending on county. Parents must wait at least six months after the original order or last modification before filing, unless extraordinary circumstances exist. The Wyoming Child Support Program through the Department of Family Services offers free modification assistance regardless of income level.
Key Facts: Wyoming Child Support Modification
| Requirement | Details |
|---|---|
| Filing Fee | $70-$160 (varies by county) |
| Waiting Period | 6 months after last order |
| Modification Threshold | 20% or more change in support amount |
| Three-Year Review | Available without showing material change |
| Calculation Method | Income Shares Model (Wyo. Stat. § 20-2-304) |
| Self-Support Reserve | $1,255/month (2026 federal poverty level) |
| Retroactive Modifications | Not permitted before petition filing date |
| Free Help Available | Wyoming Child Support Program (DFS) |
What Qualifies as Grounds for Modification in Wyoming
Wyoming courts grant child support modifications when applying current guidelines produces a support amount that differs by 20% or more from the existing order, or when a material change in circumstances substantially affects either parent's financial situation. Under Wyo. Stat. § 20-2-311, either parent or the Department of Family Services may petition for modification. The statute specifically requires that six months must pass since the last order was entered or adjusted before filing a new petition.
Three distinct pathways exist for modifying child support in Wyoming. First, the 20% threshold modification applies when the current order is at least six months old and recalculation shows at least a 20% change. Second, a substantial change in circumstances allows modification at any time when significant events alter the financial picture. Third, every three years upon request, the court must review and adjust the support order without requiring proof of changed circumstances.
Common Grounds That Qualify for Modification
Job loss constitutes a material change in circumstances that typically justifies modification under Wyoming law. The court examines whether the unemployment was voluntary or involuntary, with voluntary unemployment potentially resulting in income imputation at the parent's earning capacity. A parent earning $5,000 monthly who becomes unemployed involuntarily would likely see significant modification eligibility, while one who voluntarily quits may face imputed income calculations.
Significant income changes for either parent create modification grounds when the change affects the support calculation by 20% or more. Income increases exceeding 25-30% typically trigger reconsideration, as do substantial decreases from documented economic hardship. Wyoming courts analyze whether income changes are temporary or permanent, with temporary fluctuations receiving less modification consideration than permanent alterations to earning capacity.
Changes in custody or parenting time arrangements directly affect support obligations under Wyoming's income shares model. When a parent's overnight percentage increases from 20% to 35% of the year (exceeding the 25% shared custody threshold), the calculation method shifts from sole custody to shared custody, multiplying the base obligation by 150% and applying offsets between parents. Such changes frequently produce modifications exceeding the 20% statutory threshold.
The 20% Threshold Rule Explained
Wyoming's 20% modification threshold operates as a statutory presumption under Wyo. Stat. § 20-2-311, meaning the court presumes a material change exists when current guidelines produce an amount differing by 20% or more per month from the existing order. This mathematical test applies to the total monthly obligation, not to specific components like health insurance or childcare costs. For an existing order of $800 per month, a recalculated amount of $960 or higher (20% increase) or $640 or lower (20% decrease) would satisfy this threshold.
The 20% rule provides objective criteria for both parents and courts to evaluate modification viability before expending resources on litigation. Parents contemplating modification should run calculations using the Wyoming Child Support Calculator at childsupport.wyoming.gov before filing. If the calculated amount differs by less than 20%, the petition may face dismissal unless the parent can demonstrate extraordinary circumstances beyond simple financial changes.
Importantly, the 20% threshold does not apply to modifications brought within three years of the last order when the moving party relies solely on the three-year review provision. After three years, either parent may request recalculation and adjustment without proving any specific change in circumstances, making this pathway valuable when gradual changes accumulate without crossing the 20% threshold individually.
Step-by-Step Process to Modify Child Support
Filing a child support modification petition in Wyoming requires systematic preparation of documents, proper court filing, and service of process on the other parent. The Wyoming Judicial Branch provides official form packets (Packet 5 for child support modification alone, Packet 7 for combined custody and support modification) updated May 2025, available free online at wyocourts.gov or for $10 printed from the Clerk of District Court office.
Step 1: Gather Financial Documentation
Both parents must complete Wyoming's Confidential Financial Affidavit, a court-approved form requiring comprehensive income and expense disclosure. Required attachments include the two most recent federal income tax returns with all schedules, the three most recent pay stubs showing year-to-date earnings, proof of health insurance costs and coverage, documentation of childcare expenses, and evidence of any special needs or extraordinary expenses for the children.
Self-employed parents face additional documentation requirements including business profit and loss statements for the past two years, business tax returns, documentation of business expenses claimed as deductions, and evidence of actual versus reported income. Courts may impute income to self-employed parents who appear to underreport earnings or take excessive deductions that reduce apparent income.
Step 2: Calculate the Proposed New Support Amount
Use the official Wyoming Child Support Calculator to determine whether modification meets the 20% threshold. The calculator requires both parents' net monthly income (gross income minus federal taxes, state taxes, FICA, mandatory retirement contributions, union dues, and health insurance premiums). At combined net monthly income of $5,000, presumptive support equals $693 for one child and $1,046 for two children under the statutory tables in Wyo. Stat. § 20-2-304.
Step 3: File the Petition with District Court
File the modification petition in the same District Court that issued the original order. Filing fees range from $70 to $160 depending on county; verify the exact amount with your local Clerk of District Court before filing. Parents unable to afford the filing fee may request a waiver by filing an Affidavit of Indigency demonstrating financial hardship.
The petition must specifically allege that applying presumptive child support guidelines will change the support amount by 20% or more per month, or identify other grounds for modification such as substantial change in circumstances or the three-year review provision. Include the case number from the original action and specify all children covered by the existing order.
Step 4: Serve the Other Parent
After filing, you must serve the petition on the other parent through methods authorized under Wyoming Rules of Civil Procedure. Acceptable service methods include personal service by the county sheriff or private process server, certified mail with return receipt requested (if the other parent signs), or acceptance of service signed by the other parent and notarized. Service establishes the effective date from which any modification can apply; no retroactive modification before service is permitted under Wyo. Stat. § 20-2-311(d).
Step 5: Attend the Hearing
If the other parent contests the modification, the court schedules a hearing where both parties present evidence and testimony. Bring original copies of all financial documentation, the completed child support calculation worksheet, and any evidence supporting your claimed change in circumstances. Wyoming courts typically issue modification decisions within 30-60 days of the hearing, though complex cases involving disputed income or custody issues may take longer.
Wyoming's Income Shares Calculation Model
Wyoming calculates child support using the income shares model codified in Wyo. Stat. § 20-2-304, which determines support based on the economic principle that children should receive the same proportion of parental income they would have enjoyed if their parents lived together. The model combines both parents' net monthly incomes, applies a statutory table to determine the total child support obligation, then allocates that obligation between parents proportionally to their income shares.
The statutory support schedule covers combined net monthly incomes from $833 to higher amounts, with courts extrapolating for incomes exceeding the table's upper limits. At $8,000 combined monthly net income, presumptive support reaches approximately $1,021 for one child, $1,540 for two children, and $1,848 for three children. These amounts represent the total obligation before proportional allocation between parents.
Three Calculation Methods Under Wyoming Law
The sole custody calculation applies when one parent has physical custody exceeding 75% of overnights annually (more than 274 nights per year). Under this method, the non-custodial parent pays their proportional share of the total obligation directly to the custodial parent. If combined monthly net income equals $6,000 and the non-custodial parent earns $4,000 (67% of combined income), they pay 67% of the $790 total obligation for one child, equaling $529 monthly.
Shared custody calculations apply when each parent has overnights exceeding 25% of the year (at least 92 nights annually). Wyoming multiplies the basic obligation by 150% before allocation, reflecting increased costs when children maintain two households. The calculation then offsets each parent's proportional share, with the higher-earning parent paying the difference to the other. This adjustment frequently reduces the net payment compared to sole custody calculations with identical incomes.
Split custody applies when parents have multiple children and each parent has primary physical custody of at least one child. Courts calculate separate support obligations for each parent based on the children in the other parent's physical custody, then offset the amounts with the parent owing more paying the net difference.
Deviation from Presumptive Guidelines
Wyoming courts may deviate from presumptive child support when strict application would be unjust or inappropriate under Wyo. Stat. § 20-2-307. The statute enumerates specific factors courts must consider when evaluating deviation requests, placing the burden of proof on the party seeking deviation. If a party unsuccessfully seeks deviation, the court may order that party to pay the other side's attorney fees and costs for the deviation proceedings, creating significant risk in pursuing marginal deviation arguments.
Statutory deviation factors include the child's age and any special needs, extraordinary educational or medical expenses, transportation costs for visitation across substantial distances, the standard of living the child would have enjoyed absent the divorce, each parent's financial resources and earning capacity, responsibility for supporting children from other relationships, and the value of services contributed by either parent (such as stay-at-home parenting). Wyoming uniquely allows courts to consider a parent's violations of custody and visitation orders when deciding deviation requests, provided the judge finds those violations relevant to the support determination.
The Self-Support Reserve Protection
Wyoming protects low-income obligors through a self-support reserve equal to the federal poverty guideline for one person, set at $1,255 per month ($15,060 annually) in 2026. When a parent's net income falls below this threshold, the court reduces the support obligation to prevent pushing the obligor below poverty level. If a parent earning $1,400 monthly net income would owe $300 under normal calculations, the court may reduce the obligation to preserve at least $1,255 for the obligor's basic needs.
Free Help Through Wyoming Child Support Program
The Wyoming Child Support Program, administered by the Department of Family Services, provides free modification assistance to any parent regardless of income level. Services include case review and financial analysis, preparation of modification petitions, representation by Child Support Program attorneys in modification hearings, income verification and investigation, and assistance with service of process. Contact the program at (307) 777-5300 or toll-free (888) 570-9914, or visit childsupport.wyoming.gov.
Parents receiving public assistance (TANF, Medicaid) must cooperate with the Child Support Program as a condition of benefits unless they qualify for the Family Violence Option exemption. Any proposed modification may affect benefit eligibility, making consultation with both your DFS caseworker and child support office essential before filing. The program automatically reviews cases every three years for potential modification when support is assigned to the state.
Critical Rules About Retroactive Modification
Wyoming law under Wyo. Stat. § 20-2-311(d) prohibits retroactive modification of child support except in two narrow circumstances: when both parties agree in writing to retroactive adjustment, or when the modification applies to any period during which a modification petition was pending (but only from the date the respondent received service of the petition). This strict limitation makes timing critical when circumstances change.
The practical effect requires immediate action when modification grounds arise. A parent who loses their job in January but waits until June to file a modification petition cannot obtain reduced support for the intervening five months. Arrears accumulate at the original rate throughout the delay, potentially creating substantial debt that cannot be forgiven through later modification. Courts have no authority to excuse arrears that accrued before the petition filing date.
During modification proceedings, the original order remains fully enforceable. Continue making payments at the current amount while awaiting court resolution. Stopping payments or unilaterally reducing amounts based on expected modification creates arrears subject to all enforcement remedies including wage garnishment, tax refund interception, license suspension, and contempt proceedings.
When to Hire an Attorney vs. Self-Representation
Self-representation works well for straightforward modifications where both parents agree on the need for adjustment and the new amount. The Wyoming Judicial Branch's form packets provide comprehensive instructions designed specifically for pro se litigants. Simple income-based modifications with clear documentation often proceed smoothly without attorney involvement, particularly when using the Child Support Program's free services.
Hiring a family law attorney becomes advisable when the other parent contests the modification, complex income situations exist (self-employment, multiple income sources, stock options, or commissions), custody changes accompany the support modification request, deviation from guidelines is sought, substantial arrears or enforcement issues complicate the case, or domestic violence concerns affect the proceedings. Attorney fees for contested modifications typically range from $2,500 to $7,500 depending on complexity and whether the case proceeds to hearing.
H2 Frequently Asked Questions
How much does it cost to modify child support in Wyoming?
Filing fees for child support modification in Wyoming range from $70 to $160 depending on your county, as of May 2026. Parents unable to afford the fee may file an Affidavit of Indigency requesting a waiver. The Wyoming Child Support Program provides free modification services regardless of income. Verify exact fees with your local Clerk of District Court before filing.
How long does child support modification take in Wyoming?
Uncontested modifications typically take 60-90 days from filing to entry of the new order when both parents agree. Contested cases requiring a hearing may take 4-6 months or longer depending on court calendars and case complexity. Emergency modifications for substantial income loss may receive expedited processing, though temporary orders during litigation remain rare in Wyoming practice.
Can I reduce child support if I lose my job in Wyoming?
Job loss constitutes a material change in circumstances qualifying for modification under Wyoming law. File your modification petition immediately upon losing employment to minimize arrears accumulation at the original rate. Courts examine whether job loss was voluntary or involuntary, with voluntary unemployment potentially resulting in income imputation at your earning capacity rather than actual (zero) income.
What is the 20% rule for Wyoming child support modification?
Wyoming presumes a material change exists when recalculating support under current guidelines produces an amount differing by 20% or more from the existing order. For an $800 monthly order, the new calculation must equal $960+ (increase) or $640 or less (decrease) to meet this threshold. Use the official Wyoming Child Support Calculator at childsupport.wyoming.gov to test your case before filing.
How often can I request child support modification in Wyoming?
Wyoming requires waiting at least six months after the last order or modification before filing a new petition based on the 20% threshold. However, substantial changes in circumstances (job loss, disability, custody changes) may justify modification at any time. Every three years, either parent may request review and adjustment without proving any specific change in circumstances under Wyo. Stat. § 20-2-311.
Can Wyoming modify child support retroactively?
No, Wyoming prohibits retroactive modification except from the date you served the modification petition on the other parent, or when both parties agree to retroactive adjustment in writing. Courts cannot reduce support for periods before the petition filing date under Wyo. Stat. § 20-2-311(d). File immediately when grounds arise to prevent accumulating arrears at the old rate.
Do I still pay child support during modification proceedings?
Yes, the existing order remains fully enforceable until the court enters a modified order. Continue paying the current amount throughout modification proceedings. Stopping or reducing payments unilaterally creates arrears subject to wage garnishment, tax interception, license suspension, and contempt penalties. Any modification granted applies only from the date of service forward.
What if the other parent won't provide financial information?
Wyoming courts can compel financial disclosure through discovery mechanisms including interrogatories, document requests, and subpoenas to employers or financial institutions. If a parent refuses to comply, the court may impute income based on available evidence, enter default judgment using estimates, hold the non-complying party in contempt, or award attorney fees to the complying party. The Child Support Program can assist with income verification through state databases.
Can I modify child support if my ex gets remarried?
Remarriage alone typically does not justify modification because Wyoming child support is based on the parents' incomes, not stepparents' income. However, if remarriage substantially changes your ex-spouse's financial circumstances (reduced housing costs, shared expenses, ability to work more hours), indirect effects may create grounds. A stepparent's income may become relevant only when the biological parent voluntarily reduces work hours or becomes voluntarily underemployed.
What forms do I need to modify child support in Wyoming?
Use Packet 5 (Child Support Modification - Petitioner) for support-only modifications, or Packet 7 (Custody and Child Support Modification - Petitioner) when also changing custody. Required forms include the Petition for Modification, Confidential Financial Affidavit with attachments, Child Support Calculation Worksheet, and proposed Order Modifying Child Support. Download free at wyocourts.gov or purchase printed packets for $10 from your Clerk of District Court.