South Carolina uses the Income Shares model — both parents’ gross incomes are combined. Updated for 2026 — covers 50/50 custody, arrears, modifications and South Carolina child support laws.
BothParents Income
NoneIncome Cap
18Age Support Ends
14%Arrears Interest
🌴 South Carolina Income Shares Model
South Carolina Child Support Calculator 2026
South Carolina uses the Income Shares model — both parents’ gross incomes are combined.
ℹSouth Carolina uses gross income — Gross = total income before any deductions.
$
$0$20k
$
$0$20k
$
$
Estimated Monthly Child Support
$0
per month
Annual Total
$0
Combined Income
—
Until Age
18
* Estimate using official South Carolina income shares formula. Courts may deviate based on special circumstances. Consult a South Carolina family law attorney for your specific situation.
🌴 How South Carolina Calculates Child Support
ModelIncome Shares — both parents’ combined gross income
Income CapNo set cap — courts use discretion
Minimum Order$100/month minimum regardless of income
Arrears Interest14% annual interest on unpaid arrears
South Carolina Key RuleSouth Carolina uses combined gross income against published Appendix schedule tables
Additional InfoSouth Carolina charges 14% annual interest on arrears — one of the highest rates in the country
⚖ 50/50 Custody in South Carolina
Does Child Support Apply With 50/50 Custody in South Carolina?
In most cases, yes. South Carolina 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 South Carolina family law attorney for exact figures.
📋 South Carolina Arrears Calculator
South Carolina Child Support Arrears Calculator
Calculate total back child support including 14% annual interest South Carolina applies to unpaid arrears.
⚠South Carolina charges 14% annual interest on all unpaid child support arrears.
$
$
$
Total Arrears Owed (with 14% Interest)
$0
including South Carolina 14% 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
18
* South Carolina applies 14% annual interest to unpaid child support. There is generally no statute of limitations on child support debt.
🔄 Modification Estimator
South Carolina Child Support Modification
Estimate your new payment and check if you qualify for a modification in South Carolina.
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?
—
Time Since Order
—
* Qualification estimate only. Consult a South Carolina family law attorney before filing.
📜 Updated 2026
South Carolina Child Support Laws 2026
Key rules, age cutoffs and what you need to know in South Carolina.
FORMULA How South Carolina Calculates Child Support
South Carolina Code Section 63-17-470 governs child support. South Carolina uses Income Shares with published schedule tables. SC charges 14% interest on arrears.
AGE When Does Child Support End in South Carolina?
Child support in South Carolina ends when the child turns 18 — Support ends at 18 or high school graduation. 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 South Carolina
South Carolina charges 14% annual interest on unpaid child support arrears. South Carolina’s rate of 14% is among the higher rates in the country. There is generally no statute of limitations on child support debt.
ENFORCEMENT South Carolina Child Support Enforcement
South Carolina 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 South Carolina
Child support can be modified in South Carolina 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.
📅 South Carolina 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 South Carolina Family Law Attorney?
This calculator provides estimates. For filing, modifying or enforcing a child support order, connect with a local family law attorney.