Quick answer: In South Carolina, a family court can modify child support on a showing of changed circumstances. The statutes we read set no percentage; the state child support agency treats a new amount 20% lower than the old as substantial. Only payments that accrue after the modification can change, and a request does not stop enforcement of the existing order.
This South Carolina child support modification calculator applies S.C. Code 63-17-830. Enter your current order and the amount the guidelines give today (you can get it from the South Carolina child support calculator), say whether circumstances have substantially changed, and it shows the monthly gap, the agency’s 20% reference and what the gap adds up to.
South Carolina child support modification at a glance
| Rule | What South Carolina says |
|---|---|
| Standard | Changed circumstances; the division can object to a request that does not show them, and the family court decides (S.C. Code 63-17-830) |
| What can change | Only payments accruing after the modification (63-17-830(C)) |
| Enforcement | A request does not stop enforcement of the existing order meanwhile (63-17-830(B)) |
| Court power | Orders touching the maintenance of children may be made from time to time after final judgment (20-3-160) |
| Agency reference | The state agency treats a new amount 20% lower than the old as substantial (court self-help packet) |
| Reduction form | A parent can file a Support Reduction Complaint (SCCA451) after a substantial change (South Carolina Judicial Department FAQ) |
How does child support modification work in South Carolina?
- Know what counts as a substantial change. See what counts as a substantial change in South Carolina.
- File promptly. See how to modify child support in South Carolina.
- Income problems and incarceration. See child support after job loss or incarceration in South Carolina and, for what stays owed, the South Carolina child support arrears calculator.
What does this modification calculator check?
The calculator checks whether you report a substantial change, shows the monthly gap against the guideline amount, whether it reaches the agency’s 20% reference and the accrued difference. It cannot decide whether a family court will find a change substantial.
Frequently asked questions
What do I have to show to modify South Carolina child support?
A substantial change in circumstances since the order.
Is there a South Carolina percentage for child support modification?
Not in the statutes we read; the state agency treats a new amount 20% lower than the old as substantial.
Can South Carolina modify support that already accrued?
No. Only payments accruing after the modification may be modified.
Does filing to modify stop South Carolina child support enforcement?
No. A request does not preclude enforcing and collecting on the existing order.
How do I ask South Carolina to reduce my child support?
File a Support Reduction Complaint (SCCA451) with the family court and serve the other parent.