Mississippi calculates child support using the percentage-of-income model under Miss. Code Ann. § 43-19-101, applying a fixed percentage of the non-custodial parent's adjusted gross income. For one child the guideline amount is 14% of adjusted gross income, for two children it is 20%, and for five or more children it is 26%. Mississippi is one of only nine states that uses this single-income model rather than the income shares approach, meaning only the non-custodial parent's earnings factor into the base calculation. A child support calculator for Mississippi applies these statutory percentages after subtracting mandatory deductions from gross income.
| Key Fact | Detail |
|---|---|
| Governing Statute | Miss. Code Ann. § 43-19-101 |
| Calculation Model | Percentage of Income (non-custodial parent only) |
| 1 Child | 14% of adjusted gross income |
| 2 Children | 20% of adjusted gross income |
| 3 Children | 22% of adjusted gross income |
| 4 Children | 24% of adjusted gross income |
| 5+ Children | 26% of adjusted gross income |
| Filing Fee | Approximately $160 (varies by county, as of March 2026) |
| Support Duration | Until age 21 (one of few states extending past 18) |
| Enforcement Agency | MDHS Division of Child Support Enforcement |
| Income Review Threshold | Written findings required if income is below $10,000/year or above $100,000/year |
How the Mississippi Child Support Calculator Works
The Mississippi child support calculator applies a straightforward percentage of the non-custodial parent's adjusted gross income, producing a monthly obligation amount in three steps: determine gross income, subtract allowable deductions, and multiply by the statutory percentage under Miss. Code Ann. § 43-19-101. For a non-custodial parent earning $4,000 per month in adjusted gross income with two children, the calculator yields $800 per month (20% of $4,000). This percentage-of-income model differs from the income shares model used by 41 other states because it does not factor in the custodial parent's earnings.
The calculation process follows a specific sequence that Mississippi chancery courts and the MDHS Division of Child Support Enforcement use when establishing or modifying support orders. Every Mississippi child support worksheet produced by the court incorporates the same formula. Understanding each step allows parents to verify whether a proposed order aligns with statutory guidelines or whether a deviation applies.
Step-by-step, the Mississippi child support worksheet requires:
- Identify all sources of gross income for the non-custodial parent
- Subtract federal, state, and local income taxes (actual liability, not withholding)
- Subtract Social Security contributions (FICA)
- Subtract mandatory retirement or disability contributions
- Subtract any existing court-ordered child support for other children
- Apply the statutory percentage based on the number of children
- The result is the monthly child support obligation
What Counts as Gross Income Under Mississippi Law
Gross income for the Mississippi child support calculator includes all earned and unearned income of the non-custodial parent, encompassing wages, self-employment earnings, commissions, investment income, disability benefits, unemployment compensation, and alimony received from another relationship. Miss. Code Ann. § 43-19-101(3) defines gross income broadly to capture virtually every income source. The statute specifically excludes the income of the non-custodial parent's current spouse or second household members.
Mississippi courts include the following sources when calculating child support:
- Wages, salary, and overtime pay
- Self-employment income (net business revenue minus ordinary and necessary expenses)
- Commissions and bonuses
- Dividends, interest, and trust income
- Workers' compensation benefits
- Disability benefits (Social Security Disability, private disability insurance)
- Unemployment compensation
- Annuity and retirement distributions
- Alimony received from a prior relationship
- Rental income and royalties
Mississippi courts may also impute income to a parent who is voluntarily unemployed or underemployed. However, under SB 2082 (enacted 2024), courts are now prohibited from treating incarceration as voluntary unemployment when establishing or modifying child support orders. This change ensures that incarcerated parents are not assigned earning capacity they cannot achieve while imprisoned.
Allowable Deductions That Reduce Adjusted Gross Income
Mississippi law permits four categories of deductions from gross income to arrive at the adjusted gross income figure used in the child support calculator, reducing the base amount before the percentage is applied. Under Miss. Code Ann. § 43-19-101(3), allowable deductions include taxes, Social Security, mandatory retirement contributions, and pre-existing child support obligations. Voluntary 401(k) contributions, health insurance premiums, and union dues are not automatic deductions under the statute.
The four categories of deductions are:
- Federal, state, and local income taxes based on actual tax liability (overpayments or excess withholding beyond actual liability do not count as deductions)
- Social Security contributions (employee's share of FICA, currently 7.65% of wages up to the Social Security wage base)
- Mandatory retirement or disability contributions required by an employer (voluntary contributions to 401(k) or IRA plans are excluded)
- Court-ordered child support payments for children from other relationships that are actually being paid
The court may also exercise discretion to subtract an amount for other children living in the non-custodial parent's household, though this deduction is not mandatory. A Mississippi child support worksheet should reflect only documented deductions supported by pay stubs, tax returns, or court orders.
Mississippi Child Support Percentage Guidelines
Mississippi applies fixed percentages to adjusted gross income under Miss. Code Ann. § 43-19-101(1), with 14% for one child and increasing incrementally to 26% for five or more children. These percentages have remained unchanged since the statute's original enactment. A proposed revision under SB 2259 (2024) would have restructured the percentages for different income brackets, but that bill died in committee on March 5, 2024.
| Number of Children | Percentage of Adjusted Gross Income | Example ($3,500/mo AGI) |
|---|---|---|
| 1 child | 14% | $490/month |
| 2 children | 20% | $700/month |
| 3 children | 22% | $770/month |
| 4 children | 24% | $840/month |
| 5 or more | 26% | $910/month |
When the non-custodial parent's adjusted gross income falls below $10,000 per year (approximately $833 per month), the court must make a written finding addressing whether the guideline amount is reasonable given the parent's basic subsistence needs. The same written-finding requirement applies when adjusted gross income exceeds $100,000 per year ($8,333 per month). These threshold requirements under Miss. Code Ann. § 43-19-101(2) provide judicial oversight at both extremes of the income spectrum.
When Courts Deviate from the Child Support Calculator
Mississippi chancery courts may deviate from the guideline percentages when applying the standard formula would produce an unjust or inappropriate result, but the court must state specific reasons for any deviation in its written order. Miss. Code Ann. § 43-19-103 lists 10 factors that justify deviation, including extraordinary medical expenses, a child's independent income, and seasonal variations in the parent's earnings. Deviations occur in approximately 15-20% of Mississippi child support cases.
Factors that may justify a deviation from the child support calculator result:
- Extraordinary medical, psychological, educational, or dental expenses of the child
- Independent income of the child (trust funds, employment income, Social Security benefits)
- The obligor paying both child support and spousal support (alimony)
- Seasonal variations in the non-custodial parent's income or employment
- The age of the child (older children may have higher expenses)
- Particular shared custody or visitation arrangements that reduce the custodial parent's expenses
- Total assets available to the obligee, obligor, and child
- Childcare expenses incurred due to employment or the custodial parent's disability
- Transportation costs for visitation
- Any other adjustment the court finds necessary for an equitable result
Shared Custody and the Mississippi Child Support Calculator
Mississippi has no statutory formula for adjusting child support in shared custody arrangements, leaving adjustments to judicial discretion under the deviation factors in Miss. Code Ann. § 43-19-103. When parents share roughly equal parenting time, courts may reduce the non-custodial parent's obligation to account for the increased direct expenses that parent incurs. However, there is no automatic 50/50 offset built into the current Mississippi child support calculator.
Pending legislation may change this calculation significantly. HB 1662 (2026), currently under consideration in the Mississippi Legislature, would establish a rebuttable presumption of joint custody with equal parenting time and create an offset formula for child support when custody is equally shared. Under the proposed offset formula, courts would calculate each parent's support obligation as if each were the non-custodial parent, then subtract the lesser amount from the greater amount. The higher-income parent would pay only the difference to the lower-income parent.
For example, under the proposed HB 1662 offset formula with two children:
- Parent A earns $5,000/month adjusted gross income: $5,000 x 20% = $1,000
- Parent B earns $3,000/month adjusted gross income: $3,000 x 20% = $600
- Parent A pays Parent B the difference: $1,000 minus $600 = $400/month
This bill has a companion measure (SB 2027) in the Senate. As of March 2026, neither bill has been enacted.
How Long Child Support Lasts in Mississippi
Child support in Mississippi continues until the child reaches age 21, making Mississippi one of only a handful of states where the support obligation extends beyond age 18. Under Miss. Code Ann. § 93-11-65, the obligation does not terminate automatically at the age of majority. The paying parent must obtain a court order to stop payments even after the child reaches 21 or otherwise becomes emancipated.
Emancipation events that terminate child support before age 21 include:
- The child marries
- The child enlists in full-time active military service
- The child is convicted of a felony and sentenced to 2 or more years of incarceration
- The child discontinues full-time school enrollment after reaching age 18 (unless the child has a disability)
- The child voluntarily moves out of the custodial parent's home, establishes independent living, obtains full-time employment, and discontinues education before age 21
SB 2131 (enacted 2024) amended Miss. Code Ann. § 93-11-65 to allow courts to extend child support beyond age 21 for a child with a disability that was present during minority and prevents the child from living independently. This amendment provides ongoing financial protection for disabled adult children.
Filing for Child Support in Mississippi
Filing for child support in Mississippi costs approximately $160 at the county chancery clerk's office, though fees vary by county. Parents can file a Complaint for Child Support in the chancery court of the county where the child resides, where the non-custodial parent resides, or where personal jurisdiction can be established over the non-custodial parent. Unlike Mississippi's 6-month residency requirement for divorce, there is no minimum residency duration required to file for child support.
Parents who cannot afford the filing fee may submit a Pauper's Affidavit to request a fee waiver. The MDHS Division of Child Support Enforcement also assists parents in establishing, enforcing, and modifying child support orders at no cost to the applicant. MDHS handles both intrastate and interstate cases under the Uniform Interstate Family Support Act (UIFSA).
Key steps to file for child support in Mississippi:
- Gather financial documentation (pay stubs, tax returns, W-2s, 1099s for the prior 2 years)
- Complete the Mississippi child support worksheet with income and deduction information
- File the Complaint for Child Support at the county chancery clerk's office (approximately $160 filing fee as of March 2026; verify with your local clerk)
- Serve the other parent with process
- Attend the hearing where the court applies the guideline percentages or considers deviation factors
- Receive the child support order specifying the monthly obligation amount
Mississippi Child Support Enforcement
The MDHS Division of Child Support Enforcement collects over $300 million annually in child support payments across Mississippi, using wage garnishment as the primary enforcement tool for non-paying obligors. Under Mississippi law, enforcement mechanisms escalate from income withholding to incarceration for contempt of court. The federal government supplements state enforcement by denying passports to parents who owe more than $2,500 in arrearages.
| Enforcement Tool | Trigger | Consequence |
|---|---|---|
| Income Withholding | Automatic with every new order | Employer deducts support from paycheck |
| Tax Refund Interception | Arrearages reported to state/federal | Federal and state refunds seized |
| Driver's License Suspension | MDHS request upon non-payment | License suspended until payment plan established |
| Professional License Revocation | MDHS request upon non-payment | State-issued professional licenses revoked |
| Credit Bureau Reporting | 60+ days delinquent | Arrearages reported, credit score impacted |
| Property Liens | Court order | Lien placed on real and personal property |
| Passport Denial | Arrearages exceed $2,500 | Federal passport denial or revocation |
| Contempt of Court | After other remedies exhausted | Up to 6 months in county jail |
Modifying a Mississippi Child Support Order
Mississippi allows modification of child support when a material change in circumstances has occurred since the original order, such as a 25% or greater change in either parent's income, a change in the number of children, or a significant change in the child's needs. Under Miss. Code Ann. § 43-19-101 and § 93-11-65, either parent may petition the chancery court for a modification. The court applies the same guideline percentages and deviation factors to the modified calculation.
Common grounds for modification of Mississippi child support include:
- Job loss, pay reduction, or pay increase of 25% or more
- Disability or serious illness affecting earning capacity
- Change in the number of children requiring support
- Change in custody or parenting time arrangement
- Child reaching age 21 or experiencing an emancipating event
- Incarceration of the obligor (SB 2082, 2024, prohibits imputing income during incarceration)
- Significant increase in the child's medical, educational, or special needs
To modify an existing order, file a Petition to Modify Child Support in the chancery court that issued the original order. The court retains continuing exclusive jurisdiction under UIFSA as long as the obligor, obligee, or child continues to reside in Mississippi.
Frequently Asked Questions
How is child support calculated in Mississippi?
Mississippi calculates child support by applying a fixed percentage to the non-custodial parent's adjusted gross income under Miss. Code Ann. § 43-19-101. The percentages are 14% for one child, 20% for two children, 22% for three, 24% for four, and 26% for five or more. Only the non-custodial parent's income is used in the base calculation.
What income is included in the Mississippi child support calculator?
The Mississippi child support calculator includes all earned and unearned income: wages, salary, self-employment, commissions, investments, workers' compensation, disability benefits, unemployment, retirement distributions, and alimony received. The income of the non-custodial parent's current spouse is excluded under Miss. Code Ann. § 43-19-101(3).
Does Mississippi use the income shares model for child support?
Mississippi does not use the income shares model. Mississippi is one of only nine states that uses the percentage-of-income model, which considers only the non-custodial parent's adjusted gross income. The income shares model, used by 41 states, factors in both parents' incomes. Mississippi's model under Miss. Code Ann. § 43-19-101 applies fixed percentages ranging from 14% to 26%.
At what age does child support end in Mississippi?
Child support in Mississippi ends when the child reaches age 21, not age 18 as in most states. Under Miss. Code Ann. § 93-11-65, support may end earlier if the child marries, joins the military, is convicted of a felony with a 2-plus-year sentence, or discontinues full-time education after age 18. SB 2131 (2024) allows courts to extend support past 21 for disabled children.
How much does it cost to file for child support in Mississippi?
Filing for child support in Mississippi costs approximately $160 at the county chancery clerk's office, though exact fees vary by county. As of March 2026, verify the current amount with your local clerk. Parents who cannot afford the fee may file a Pauper's Affidavit for a fee waiver. The MDHS Division of Child Support Enforcement also assists with cases at no cost.
Can child support be modified in Mississippi?
Mississippi allows child support modification when a material change in circumstances occurs, such as a 25% or greater income change for either parent, a change in custody arrangements, or a significant change in the child's needs. Either parent may petition the chancery court that issued the original order. The court recalculates using the same guideline percentages under Miss. Code Ann. § 43-19-101.
How does shared custody affect child support in Mississippi?
Mississippi has no statutory formula for adjusting child support in shared custody situations. Courts use judicial discretion under the deviation factors in Miss. Code Ann. § 43-19-103 to reduce the obligation when the non-custodial parent has substantial parenting time. HB 1662 (2026), currently pending, would create an offset formula where the higher-income parent pays the difference between the two parents' calculated amounts.
What happens if child support is not paid in Mississippi?
Mississippi enforces child support through escalating mechanisms: automatic wage garnishment, federal and state tax refund interception, driver's license suspension, professional license revocation, credit bureau reporting after 60 days of delinquency, property liens, passport denial for arrearages exceeding $2,500, and contempt of court carrying up to 6 months in jail. The MDHS Division of Child Support Enforcement administers collections.
Can a new spouse's income affect child support in Mississippi?
A new spouse's income does not factor into the Mississippi child support calculator. Miss. Code Ann. § 43-19-101(3) explicitly excludes the income of the non-custodial parent's current spouse or second household members from the gross income calculation. However, a court exercising deviation authority under Miss. Code Ann. § 43-19-103 may consider the total household resources when determining whether the guideline amount is appropriate.
Does Mississippi impute income to unemployed parents for child support?
Mississippi courts may impute income to a parent who is voluntarily unemployed or underemployed based on that parent's education, work history, and earning capacity. However, SB 2082 (enacted 2024) now prohibits courts from treating incarceration as voluntary unemployment when establishing or modifying child support orders. Courts must distinguish between a parent who chooses not to work and one who is physically unable to earn income due to confinement.