How to Modify Child Support in Mississippi: Filing Steps and Effective Date

By the FigureMyTax Editorial Team · How we calculate

To modify Mississippi child support, file a petition in chancery court and give the other parent notice, or ask DHS for the three-year review. A change can start only from notice, and a court-approved stipulated agreement works as a modification.

How do you modify child support in Mississippi?

1. Run the guideline amount in the Mississippi child support calculator and see the gap in the modification calculator.
2. File a petition to modify in the chancery court that has your order (Miss. Code 93-11-65), or ask DHS for the three-year review if it enforces your order.
3. Give notice to the other parent: a change can start only from the date notice of the petition is given (43-19-34(4)).
4. Prove a material change unless you are in the DHS three-year review.
5. Keep paying the existing order until the court changes it.

Why does the Mississippi notice date matter?

Because the statute bars retroactive modification except from the date notice of the petition to modify has been given, directly or through the appropriate agent, to the obligee or, where the obligee is the petitioner, to the obligor (43-19-34(4)). A change in January and notice in July leaves six months at the old amount.

Can Mississippi parents agree to modify without a trial?

Yes. In place of legal proceedings, a written stipulated agreement for modification signed by the responsible parent, acknowledged before a clerk or notary and filed with and approved by the judge has the same force and effect, retroactively and prospectively as its terms say, as an order of modification (43-19-34(1)).

How does DHS start a modification?

When DHS determines a modification is appropriate in a case it handles, it sends the defendant a motion and notice of intent to modify with a proposed modified order, by certified mail with restricted delivery or by personal service, stating the hearing date. The defendant can sign and return the proposal before the hearing; if not, the court reviews it on the hearing date and approves it in whole or in part (43-19-34(2)).

What if I owe arrears?

A preexisting arrearage does not bar DHS’s review and adjustment, and if a downward modification is warranted the arrearage cannot be used to contest it in later proceedings (43-19-34(3), (5)). The arrears themselves stay owed.

Which court hears the petition?

The chancery court of the proper county, which may hear suits for the custody, care, support and maintenance of minor children; in a case DHS enforces under Title IV-D the court keeps continuing jurisdiction (93-11-65(1), (6)).

Do I have to keep my address current?

Yes. Each party to a child support proceeding must notify the other within five days after any change of address and update the court and the state case registry with identity, address, phone and employer information; written notice to the last address on file can satisfy service in later enforcement actions (93-11-65(5), (7)).

How much does a late petition cost? An example

If notice happens 3, 6 or 9 months after your change, the relief you lose at a $300 monthly difference is:

What happens to unpaid support while the petition is pending?

It stays owed and can become a judgment after 30 days. See how long Mississippi arrears last and add up your balance.

Frequently asked questions

Official sources

• Miss. Code 43-19-34: review and modification; no retroactive modification
• Miss. Code 43-19-101: child support award guidelines
• Miss. Code 43-19-103: criteria for deviating from the guidelines
• Miss. Code 93-11-65: support of minor children; emancipation
• 42 U.S.C. 666(a)(9): no retroactive modification of support already due

This is general information, not legal advice. It is based on the cited Mississippi statutes, rules and court opinions, and every case turns on its own facts. Confirm how the law applies to your situation with a licensed Mississippi attorney.