Mississippi Child Support — Calculator, Laws & Guide (2026)

Understanding Mississippi child support laws helps both custodial and non-custodial parents know their rights and obligations. This comprehensive Mississippi child support guide covers how payments are calculated, what income counts, when support can be modified, and how orders are enforced. Whether you are going through a divorce, seeking a modification, or dealing with non-payment, this guide explains Mississippi’s child support system in plain language.

Verified against Mississippi statutes and federal OCSE guidelines as of May 2026.

Mississippi Child Support Overview

Mississippi uses the percentage of income model. Child support is calculated as a set percentage of the non-custodial parent’s income, based on the number of children. This model is simpler but considers only one parent’s income.

How Mississippi Calculates Child Support

The Mississippi child support calculation considers multiple factors:

1. Determine each parent’s gross income — wages, salary, commissions, bonuses, self-employment income, investment income, and other sources.
2. Calculate combined parental income — add both parents’ adjusted gross incomes together.
3. Apply the guideline schedule — Mississippi’s guidelines provide a base support amount based on combined income and number of children.
4. Prorate between parents — each parent’s share is proportional to their percentage of the combined income.
5. Add healthcare and childcare costs — these are added to the base amount and divided proportionally.
6. Apply adjustments — parenting time credits, other child obligations, and special circumstances may adjust the final amount.

Online calculator: Use our child support estimator below to calculate your estimated obligation.

What Counts as Income in Mississippi

Adjusted gross income of the non-custodial parent only. Gross income includes wages, salary, self-employment income, commissions, investment income, workers compensation, disability benefits, unemployment benefits, annuities, retirement/IRA benefits, alimony received, and any other payments from any person or entity. Excludes income of the non-custodial parent’s current spouse. Deductions: federal and state income taxes, Social Security (FICA), mandatory retirement contributions, and pre-existing child support obligations for other children.

Imputed income: YES. Courts may impute income to voluntarily unemployed or underemployed parents based on earning capacity, work history, education level, and local job market conditions. As of 2024 (SB 2082), courts are prohibited from treating incarceration as voluntary unemployment.

Deviation factors: Extraordinary medical, psychological, educational, or dental expenses; special needs of the child; shared parenting arrangements where non-custodial parent has substantial time reducing custodial parent’s expenditures; non-custodial parent’s failure to exercise visitation; work-related childcare expenses; high cost-of-living in child’s area; non-custodial parent income over 100000 or under 10000; basic subsistence needs of low-income obligor. Any deviation requires written findings explaining why the guidelines are unjust or inappropriate.

Healthcare & Childcare in Mississippi Child Support

Health insurance: Healthcare is an add-on obligation on top of the basic percentage amount. Courts may order either parent to enroll and maintain the child in a health insurance plan based on available options, employment history, income, and resources. If insurance is not available at reasonable cost, court must make written findings and provide alternative arrangements. Uninsured medical expenses are typically split between parents. Employers must allow payroll deduction for insurance premiums via income withholding.

Childcare costs: Work-related childcare costs are treated as an add-on expense on top of the basic percentage obligation, allocated between parents. They are not included within the percentage calculation itself.

When Does Mississippi Child Support End?

In Mississippi, child support generally ends when the child reaches 21. Earlier emancipation if child marries, enters full-time military service, or receives a felony conviction with sentence of 2 or more years. Court may also emancipate if child discontinues full-time school after age 18, voluntarily leaves custodial home, establishes independent living, or obtains full-time employment discontinuing education before 21. SB 2131 (2024) created rebuttable presumption that support continues past 21 for children with disabilities present during minority.. However, support may continue or end earlier based on:

• The child graduates from high school (if still a minor)
• The child becomes emancipated (marriage, military service, self-supporting)
• The child has special needs requiring ongoing support
• College support: YES. Courts have discretionary authority to order non-custodial parent to contribute to college education expenses including tuition, books, room and board, required fees, and necessary living expenses. Amount is capped at the rate of a Mississippi state-supported institution.

Modifying Mississippi Child Support

When to modify: Material and substantial change in circumstances of the child or either parent since the original decree, plus at least a 15 percent change in the child support obligation. For low-income obligors the threshold is 7.5 percent. Every 3 years MDHS notifies both parents of the right to request a review without proof of material change (Miss. Code Ann. 43-19-34).

How to modify: Either parent can file a petition for modification with the chancery court, or request an administrative review through MDHS Division of Child Support Enforcement. MDHS conducts automatic 3-year reviews and notifies parents of their right to request a review. No proof of material change is required for the 3-year administrative review.

Either parent can request a modification. Changes are typically not retroactive to before the date of filing the modification request.

Mississippi Child Support Enforcement

Mississippi has multiple tools to enforce child support orders when a parent fails to pay:

• Income withholding and wage garnishment; state and federal tax refund interception; driver’s license suspension; professional and occupational license suspension; passport denial for arrears exceeding 2500; liens on real and personal property; credit bureau reporting; contempt of court with up to 6 months jail as last resort

Contact Division of Child Support Enforcement (DCSE), Mississippi Department of Human Services (MDHS) at https://www.mdhs.ms.gov/childsupport/ for enforcement assistance.

Additional Mississippi rules: Mississippi is one of few states using the flat percentage model applied only to non-custodial parent income. HB 1662 (50-50 joint custody default) reached the Governor’s desk April 1 2026 and if signed takes effect July 1 2026 which could significantly impact future calculations. SB 2082 (2024) prohibits treating incarceration as voluntary unemployment. SB 2131 (2024) creates rebuttable presumption of continued support past 21 for children with disabilities present during minority.

Official Sources & Resources

• Division of Child Support Enforcement (DCSE), Mississippi Department of Human Services (MDHS): https://www.mdhs.ms.gov/childsupport/
• Federal OCSE: acf.hhs.gov/css
• Cornell LII — Child Support: law.cornell.edu
• Mississippi Guidelines Statute: Miss. Code Ann. 43-19-101 (percentages and income definition), Miss. Code Ann. 43-19-103 (deviation criteria), Miss. Code Ann. 93-11-65 (termination and emancipation)

Last verified May 2026. Contact us if you notice outdated information.

Estimate Your Child Support

Use our free child support estimator to calculate estimated monthly payments. Enter both parents’ incomes, number of children, and custody arrangement to see a personalized breakdown based on your state’s formula.

Related Guides

• Mississippi Divorce Process Guide
• Mississippi Child Custody Guide
• Mississippi Alimony Guide
• All Child Support Guides