Mississippi Child Support Estimator

Mississippi sets guideline child support as a straight percentage of the paying parent’s adjusted gross income — 14% for one child, up to 26% for five or more (Miss. Code § 43-19-101). Enter the paying parent’s income for a rough estimate. It is not legal advice, and the court has the final word.

Unlike Louisiana, Mississippi’s base formula looks at only one income: the parent who will pay (the “non-custodial” parent). The other parent’s income is not part of the basic calculation. Answer a few questions for a ballpark figure.

The estimate

How many children need support in this case? Paying parent’s gross monthly income (before taxes)

Include income from essentially all sources — wages, self-employment, commissions, investment income, workers’ comp, disability, unemployment, retirement, alimony received. Do not include a new spouse’s income.

Monthly taxes and mandatory withholdings

Actual federal, state, and local income tax, Social Security (FICA), and mandatory retirement or disability contributions. Voluntary 401(k) or IRA contributions do not count.

Court-ordered support already paid for other children (monthly, if any) This will be a new custody order entered on or after July 1, 2026 with equal (50/50) parenting time

Please read. This tool is a free educational aid, not legal advice, and using it does not create an attorney-client relationship. It applies the basic Mississippi guideline (Miss. Code § 43-19-101) in a simplified way. A chancellor can deviate from the guideline for the factors in § 43-19-103 (extraordinary medical or school expenses, the child’s own income, seasonal income, special needs, parenting arrangements, and more), and where annual adjusted income is above $100,000 or below $10,000 the court must make its own written finding. Mississippi support generally runs until age 21. If parenting time will be equally shared under a new order, the 2026 equal-time law changes the math — the estimate here is a starting point only. A Louisiana case uses an entirely different two-income formula — use the Louisiana estimator instead. Do not rely on this estimate for any agreement or court filing; have a lawyer run the real numbers with the Rule 8.05 financial statements.

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