Mississippi uses the Percentage of Income model — only the paying parent’s adjusted gross income is used. Updated for 2026 — covers 50/50 custody, arrears, modifications and Mississippi child support laws.
14%1 Child Rate
NoneIncome Cap
21Age Support Ends
8%Arrears Interest
🌿 Mississippi Percentage of Income Model
Mississippi Child Support Calculator 2026
Mississippi uses the Percentage of Income model — only the paying parent’s adjusted gross income is used.
ℹMississippi uses adjusted gross income — Gross = total income before any deductions.
From this parent only — Mississippi does not use the other parent’s income
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$0$20k
From this relationship only
Reduces available income
Portion covering the child only
$
Daycare, after-school care
$
Estimated Monthly Child Support
$0
per month
Annual Total
$0
Rate Applied
—
Until Age
21
MISSISSIPPI CHILD SUPPORT SCHEDULE 2026
* Estimate using official Mississippi percentage formula. Courts may deviate based on special circumstances. Consult a Mississippi family law attorney for your specific situation.
🌿 How Mississippi Calculates Child Support
ModelPercentage of Income — paying parent’s adjusted gross income only
Income CapNo set cap — courts use discretion
Minimum Order$100/month minimum regardless of income
Arrears Interest8% annual interest on unpaid arrears
Mississippi Key RuleMississippi uses adjusted gross income — gross minus certain allowable deductions
Additional InfoMississippi child support ends at age 21, unlike most states that end at 18
⚖ 50/50 Custody in Mississippi
Does Child Support Apply With 50/50 Custody in Mississippi?
In most cases, yes. Mississippi does not automatically eliminate child support with equal parenting time.
✓General rule: With 50/50 custody, the higher-earning parent typically pays the lower-earning parent. The amount is reduced vs sole custody but rarely reaches $0.
$
$0$15k
$
$0$15k
Estimated Monthly Payment
$0
per month
Without Custody Adj.
$0
Custody Reduction
$0
Net Payment
$0
* 50/50 custody calculations are complex. This is an approximation. Consult a Mississippi family law attorney for exact figures.
📋 Mississippi Arrears Calculator
Mississippi Child Support Arrears Calculator
Calculate total back child support including 8% annual interest Mississippi applies to unpaid arrears.
⚠Mississippi charges 8% annual interest on all unpaid child support arrears.
$
$
$
Total Arrears Owed (with 8% Interest)
$0
including Mississippi 8% annual interest
Base Arrears
$0
Interest Accrued
$0
Clear in 1 Year
$0
Clear in 2 Years
$0
Clear in 3 Years
$0
Support Ends Age
21
* Mississippi applies 8% annual interest to unpaid child support. There is generally no statute of limitations on child support debt.
🔄 Modification Estimator
Mississippi Child Support Modification
Estimate your new payment and check if you qualify for a modification in Mississippi.
ℹModification rule: Most states allow modification when the new amount differs by 15-20% or $100/month, OR when there is a material and substantial change in circumstances (job loss, new child, custody change).
$
36+ months = eligible for routine review
$
Estimated New Monthly Payment
$0
per month
Current Order
$0
New Calculated
$0
Difference
$0
% Change
0%
Likely Qualifies?
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Time Since Order
—
* Qualification estimate only. Consult a Mississippi family law attorney before filing.
📜 Updated 2026
Mississippi Child Support Laws 2026
Key rules, age cutoffs and what you need to know in Mississippi.
FORMULA How Mississippi Calculates Child Support
Mississippi Code Section 43-19-101 governs child support guidelines. Mississippi is notable for support ending at 21 rather than 18. The state applies 8% annual interest on unpaid arrears.
AGE When Does Child Support End in Mississippi?
Child support in Mississippi ends when the child turns 21 — Mississippi support ends at age 21 — one of the highest in the country. Support also ends upon the child’s death, marriage or emancipation. Important: In most cases support does not stop automatically — you need a court order. Stopping payments without a court order creates arrears even after the child reaches the cutoff age.
INTEREST Arrears Interest in Mississippi
Mississippi charges 8% annual interest on unpaid child support arrears. There is generally no statute of limitations on child support debt.
ENFORCEMENT Mississippi Child Support Enforcement
Mississippi has broad enforcement powers including wage garnishment, tax refund interception, driver’s license suspension, professional license suspension, passport denial, and credit bureau reporting. Criminal charges may apply for significant or long-term non-payment.
MODIFY Modifying Child Support in Mississippi
Child support can be modified in Mississippi when there is a material and substantial change in circumstances — typically a significant income change, job loss, new children from another relationship, or change in custody. Most states also allow a periodic review every 3 years. File a petition with the court — private agreements to change support are not legally enforceable.
📅 Mississippi Payment Calendar
Child Support Payment Calendar 2026
Generate your personal payment schedule and track payments month by month.
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Monthly Total
$0
Annual Total
$0
Next Payment
—
Days Until Due
—
Payments Remaining
—
Marked Paid
$0
* Click Mark as Paid to track payments. Always keep payment receipts.
Need a Mississippi Family Law Attorney?
This calculator provides estimates. For filing, modifying or enforcing a child support order, connect with a local family law attorney.