Mississippi calculates child support with a percentage-of-income guideline, set out in Miss. Code Ann. § 43-19-101: a fixed share of the paying parent’s “adjusted gross income” tied to how many children need support, ranging from 14% for one child to 26% for five or more. A calculator applies that math instantly, but it only produces an estimate — the figure becomes an enforceable amount once a judge signs an order, and a judge can deviate from the guideline percentage if written findings support it under Miss. Code Ann. § 43-19-103.
This article is general information about Mississippi child support, not legal advice. It does not create an attorney-client relationship, and it may not reflect the most recent amendments to Mississippi law or court practice. Numbers and thresholds change; always confirm current requirements with the official Mississippi Department of Human Services Child Support program or a licensed Mississippi attorney before relying on any number.
Mississippi’s Percentage-of-Income Model, Explained
Some states split child support between both parents based on their combined income (an “income shares” model). Mississippi does not — and neither does Wisconsin, which applies its own percentage standard with a shared-placement formula on top. Under Miss. Code Ann. § 43-19-101(1), the state applies a single percentage to the paying parent’s adjusted gross income (AGI), and the percentage depends only on the number of children being supported:
- 1 child — 14% of AGI
- 2 children — 20% of AGI
- 3 children — 22% of AGI
- 4 children — 24% of AGI
- 5 or more children — 26% of AGI
These percentages are described in the statute as a “rebuttable presumption in all judicial or administrative proceedings regarding the awarding or modifying of child-support awards” — meaning courts are supposed to start here, but the number can move up or down if the facts justify it. More on that below.
What Counts as “Adjusted Gross Income”
Because the whole calculation rests on AGI, how that term is defined matters more than the percentages themselves. Under § 43-19-101(3), a court starts with gross income from essentially any source reasonably available to the paying parent — wages and salary, self-employment income, commissions, investment and trust income, workers’ compensation, disability and unemployment benefits, retirement and annuity income (including IRA distributions), alimony received, and other payments from any person or government entity. Income from a new spouse’s household is specifically excluded.
From that gross figure, the statute allows a limited, specific list of deductions — not a general “expenses” deduction:
- Federal, state, and local income taxes actually owed for the year (not voluntary overpayment)
- Social Security (FICA) contributions
- Mandatory retirement and disability contributions — voluntary contributions do not count
- Support already being paid under an existing court order for other children
A court may also subtract an amount it deems appropriate if the paying parent has other children living with them, though that deduction is discretionary rather than automatic. Whatever is left, divided by twelve, is the monthly AGI the percentage gets applied to.
A Worked Example (Illustrative Estimate Only)
Say a noncustodial parent earns $48,000 a year in gross wages and has one child due support. For illustration only, assume combined federal and state income tax withholding plus FICA works out to roughly $9,500 for the year — actual tax liability varies by filing status, withholding, and deductions, so this is a simplified stand-in, not a tax calculation.
$48,000 gross minus $9,500 in mandatory deductions leaves $38,500 in annual adjusted gross income, or about $3,208 per month. Applying the 14% guideline for one child: $3,208 × 0.14 ≈ $449 per month.
That is a rough, illustrative number only — it ignores things like existing support orders for other children, health-insurance provisions the court must also address, and any deviation a judge might apply. To run your own numbers with your actual figures, use the free Mississippi child support calculator.
When Income Falls Outside the $10,000–$100,000 Band
The statute doesn’t just hand judges a blank check outside a certain income range — but it does require extra scrutiny. Under § 43-19-101(4), when a parent’s adjusted gross income is more than $100,000 or less than $10,000 per year, the court must make a written finding on the record about whether applying the standard percentage guideline is actually reasonable, and must consider the paying parent’s basic subsistence needs where ability to pay is limited.
This threshold language is confirmed directly in the current Mississippi Code as published by two independent legal databases and in the Department of Human Services’ own guidelines document, so we’re confident it’s accurate as written. That said, the Legislature revisits child support guidelines periodically (Mississippi Department of Human Services conducts a statutory review roughly every four years, and lawmakers have introduced bills in recent sessions proposing changes to the guideline structure that did not pass). Because dollar thresholds like this are exactly the kind of detail a legislative session can change, confirm the current figure directly with MDHS Child Support Enforcement or a Mississippi attorney before treating $100,000 as a hard ceiling in your case.
The Guideline Is a Rebuttable Presumption — Not a Guarantee
Because the percentage guideline is a rebuttable presumption rather than a mandatory formula, a judge can order an amount above or below the guideline number, but only by making a written or specific on-the-record finding that applying the guideline would be unjust or inappropriate. Miss. Code Ann. § 43-19-103 lists the criteria courts use to make that call, including:
- Extraordinary medical, psychological, educational, or dental expenses
- Independent income belonging to the child
- A parent already paying both child support and spousal support
- Seasonal swings in either parent’s income or expenses
- The age of the child, since older children often cost more
- The specific shared-parenting arrangement and how much time the noncustodial parent spends with the child
- Each party’s total available assets
- Child-care costs the receiving parent pays in order to work
In practice, this means two families with identical incomes and the same number of children can end up with different support orders once a judge weighs these factors. A calculator can’t know about your extraordinary medical bills or your custody schedule — only a completed case file and a judge (or a settlement both parents agree to) can.
Turning an Estimate Into an Actual Order
A calculator result is a starting point for negotiation or for preparing your paperwork — it is not the order itself. Getting to an actual, enforceable number means documenting both parents’ income where relevant, filing the right forms with the court, and, if either parent’s circumstances later change, going back to court rather than just agreeing verbally to a new amount. Different states use different tools to verify income at this stage; if you’re curious how another state formalizes that step, our guide to Florida’s financial affidavit forms walks through one example. If your Mississippi order already exists and your income or your co-parent’s income has changed, see our guide on requesting a modification without a lawyer before you assume a new calculator number will apply automatically.
If you’re building your case from scratch, our forms interview walks you through the documents pro-se Mississippi parents typically need, step by step. For a fuller walkthrough of the whole child support process from first filing to enforcement, Navigating Child Support covers it in plain language.
FAQ
What percentage of income does Mississippi use for one child?
Fourteen percent of the paying parent’s adjusted gross income, per Miss. Code Ann. § 43-19-101. That percentage rises with additional children — 20% for two, 22% for three, 24% for four, and 26% for five or more — and a judge can still deviate from it with written findings.
Is Mississippi child support based on both parents’ income?
The core guideline percentage is applied to the noncustodial (paying) parent’s adjusted gross income, not a combined household figure. That said, both parents’ financial circumstances can become relevant if a judge is deciding whether to deviate from the guideline under § 43-19-103, so it’s worth having accurate figures for both sides.
What happens if my income is above $100,000 or below $10,000 a year?
The statute requires the court to make a written finding about whether the standard guideline percentage is reasonable in that situation, and to consider the paying parent’s basic subsistence needs. Because income thresholds like this can be amended by the Legislature, confirm the current figure with Mississippi DHS Child Support Enforcement or an attorney rather than relying solely on this article.
Can a judge order a different amount than the calculator shows?
Yes. The guideline percentage is a rebuttable presumption, not a fixed rule. A judge can order more or less if there’s a written finding that the guideline amount would be unjust or inappropriate, based on factors listed in Miss. Code Ann. § 43-19-103, such as extraordinary medical expenses, shared custody time, or a parent’s total assets.
Does a free online calculator give the exact amount the court will order?
No. A calculator applies the same percentage-of-income math the statute describes, but it can’t account for deviation factors, existing support orders, health-insurance provisions, or errors in the income figures you enter. Treat any calculator result as a planning estimate, then confirm the real number through your case file, a signed agreement, or a judge’s order.
Mississippi’s child support math looks simple on paper — multiply adjusted gross income by a percentage tied to the number of children — but the details inside “adjusted gross income,” the income thresholds that trigger extra scrutiny, and the list of factors a judge can use to deviate all shape the final number. A calculator gets you a starting estimate fast; getting to an actual court order still means working through your paperwork carefully and, where the stakes are high or your income sits outside the standard range, getting a licensed Mississippi attorney to look at your specific numbers.
Second reminder: nothing in this article is legal advice, and Mississippi child support law can change; verify current percentages, thresholds, and procedures with the Mississippi Department of Human Services Child Support program or a licensed Mississippi attorney before acting on any number.
