Under South Carolina law, unmarried mothers have sole legal custody of their children from birth until a court orders otherwise. Unmarried fathers must establish paternity before seeking any custody or visitation rights under S.C. Code § 63-17-20(B). Once paternity is legally established, both parents have equal rights under S.C. Code § 63-5-30, and courts determine custody based on 17 statutory best interest factors. The filing fee for a custody action in South Carolina Family Court is $150, with DNA tests showing 95% or higher probability creating a rebuttable presumption of paternity.
Key Facts: Custody for Unmarried Parents in South Carolina
| Factor | Details |
|---|---|
| Filing Fee | $150 (custody action); $25 per motion |
| Default Custody | Mother has sole custody until court orders otherwise |
| Paternity Threshold | 95% DNA probability creates rebuttable presumption |
| Residency Requirement | Child must live in SC 6 months (UCCJEA) |
| Best Interest Factors | 17 statutory factors under § 63-15-240 |
| Parental Preference | No gender preference; parents treated equally |
| Mediation | Mandatory for contested custody cases |
| Guardian ad Litem | $1,500-$5,000 in contested cases |
How Unmarried Mothers Obtain Custody in South Carolina
Unmarried mothers in South Carolina automatically receive sole legal and physical custody of their children at birth under S.C. Code § 63-17-20(B). This statutory presumption means mothers have immediate decision-making authority over education, healthcare, religious upbringing, and daily care without filing any court documents. The mother retains sole custody unless and until a court issues an order transferring or sharing custody rights with the father.
This automatic custody provision exists because South Carolina law does not recognize biological fathers as legal fathers without formal paternity establishment. Even if the father's name appears on the birth certificate, this alone does not grant custody or visitation rights. The mother can legally prevent contact between the child and biological father until paternity is formally established through one of the legal methods available.
What Automatic Custody Includes for Unmarried Mothers
Sole custody grants the unmarried mother exclusive authority over:
- Educational decisions including school selection, special education services, and extracurricular activities
- Medical and dental care including vaccinations, treatments, and therapy
- Religious training and spiritual upbringing
- Residence and living arrangements without father's consent
- Travel with the child including out-of-state and international trips
- Daily caregiving decisions and routine matters
The mother's sole custody continues until a father successfully establishes paternity and petitions the court for custody or visitation rights. Courts in South Carolina processed approximately 8,500 paternity cases in 2024, with the majority resulting in fathers gaining some form of custody or visitation after legal recognition.
How Unmarried Fathers Establish Paternity in South Carolina
Unmarried fathers in South Carolina must legally establish paternity before seeking any custody or visitation rights. DNA testing showing 95% or higher probability of paternity creates a rebuttable presumption under S.C. Code § 63-17-60(A)(3). Once paternity is established, fathers gain equal standing with mothers in custody proceedings, with courts applying the same 17 best interest factors regardless of gender.
Four Methods to Establish Paternity
Voluntary Acknowledgment at Birth: Both parents sign a Paternity Acknowledgment Affidavit at the hospital when the child is born. This form, when properly executed after January 1, 1998, creates a conclusive presumption of paternity under S.C. Code § 63-17-50. The father has 60 days to rescind the acknowledgment; after that period, it can only be challenged based on fraud, duress, or material mistake of fact.
Post-Birth Voluntary Acknowledgment: Unmarried parents can file a Paternity Acknowledgment Affidavit with the South Carolina Department of Health and Environmental Control (SCDHEC) or the county health department where the child was born. Both parents must sign, and the form requires notarization. Processing takes 4-6 weeks, and SCDHEC charges no fee for this service.
Administrative Paternity through DSS: Fathers can establish paternity by filing a Non-Custodial Parent Application for Child Support Services with the South Carolina Department of Social Services. DSS conducts genetic testing through accredited laboratories at no cost to the father if the mother receives public assistance. Testing costs range from $0-$300 depending on circumstances. This method does not require the mother's cooperation.
Court-Ordered Paternity: Either parent can file a paternity action in South Carolina Family Court for $150. The court may order genetic testing under S.C. Code § 63-17-800, with results showing 95% or higher probability establishing a rebuttable presumption. Court proceedings typically take 3-6 months from filing to final order.
Evidence Admissible in Paternity Hearings
Under S.C. Code § 63-17-60, South Carolina Family Courts accept the following evidence:
| Evidence Type | Legal Effect |
|---|---|
| DNA test (95%+ probability) | Rebuttable presumption of paternity |
| Signed birth certificate | Rebuttable presumption of paternity |
| Voluntary acknowledgment (post-1998) | Conclusive presumption, limited challenge |
| Foreign paternity determination | Conclusive presumption |
| Expert testimony on conception timing | Admissible as expert evidence |
| Refusal to submit to genetic testing | Negative inference allowed |
Custody Rights After Paternity Is Established
Once paternity is legally established in South Carolina, both parents have equal rights and responsibilities toward their children under S.C. Code § 63-5-30. Courts apply the same 17 best interest factors to custody determinations for formerly unmarried parents as they do for divorcing couples. The established father can petition for sole custody, joint custody, or visitation rights through South Carolina Family Court for a $150 filing fee.
Types of Custody Available to Unmarried Parents
Legal Custody: The authority to make major decisions about the child's education, healthcare, religious training, and extracurricular activities. Courts may award sole legal custody to one parent or joint legal custody requiring both parents to agree on major decisions.
Physical Custody: Determines where the child primarily resides and who provides daily care. Sole physical custody means the child lives primarily with one parent; joint physical custody means significant time with both parents, though not necessarily 50/50.
Joint Custody: Both parents share decision-making authority (legal) and/or physical time with the child. Joint custody does not automatically mean equal time; the actual schedule depends on the child's best interests and practical considerations.
Sole Custody: One parent has exclusive decision-making authority and physical custody. The non-custodial parent typically receives visitation rights unless the court finds contact would harm the child.
Filing Requirements for Custody After Paternity
Unmarried fathers seeking custody after establishing paternity must:
- File a Summons and Complaint for Custody in South Carolina Family Court ($150 filing fee)
- Serve the mother with legal documents through personal service or certified mail ($50-$100 process server fees)
- Submit a proposed parenting plan detailing requested custody arrangement
- Attend mandatory mediation if custody is contested ($100-$350 per hour)
- Participate in any guardian ad litem investigation if ordered ($1,500-$5,000)
- Attend temporary and final custody hearings
Best Interest Factors in South Carolina Custody Cases
South Carolina Family Courts determine custody for unmarried parents using 17 statutory factors under S.C. Code § 63-15-240(B). Judges must evaluate all relevant factors and issue written findings explaining their custody decision. No single factor is determinative; courts weigh the totality of circumstances to identify the arrangement serving the child's best interests.
The 17 Statutory Best Interest Factors
- Temperament and developmental needs of the child — Courts assess the child's personality, special needs, medical conditions, and developmental stage
- Parental capacity to meet the child's needs — Each parent's ability to understand and address the child's physical, emotional, and educational requirements
- Child's preferences — Given weight based on age, maturity, and ability to express reasoned preferences
- Parental wishes regarding custody — Each parent's proposed custody arrangement
- Parent-child relationship history — Past and current interactions between the child and each parent, siblings, and significant others
- Encouragement of parent-child relationship — Each parent's willingness to support the child's relationship with the other parent
- Manipulation or coercive behavior — Whether either parent involves the child in parental disputes inappropriately
- Disparaging the other parent — Negative comments about the other parent in front of the child
- Parental availability — Each parent's ability to be actively involved in the child's daily life
- Child's adjustment — Stability in the child's current home, school, and community
- Residential stability — Quality and stability of each parent's current and proposed living situation
- Mental and physical health — Health of all individuals involved, though disability alone is not determinative
- Cultural and spiritual background — The child's heritage and religious upbringing
- Abuse or neglect history — Any history of child abuse or neglect by either parent
- Domestic violence — Past domestic violence between parents or involving the child
- Recent parental relocation — Whether a parent moved more than 100 miles from the child's residence in the past year (except for safety reasons)
- Other relevant factors — Any additional considerations the court deems necessary
Parenting Plans for Unmarried Parents
South Carolina requires parents to submit individual or joint parenting plans at all temporary custody hearings where custody is contested. These plans must detail the proposed allocation of parenting time, decision-making authority, and specific arrangements for the child's education, healthcare, extracurricular activities, and religious training. Filing a parenting plan demonstrates to the court that a parent has thoughtfully considered the child's needs.
Required Parenting Plan Elements
A comprehensive South Carolina parenting plan should address:
- Physical custody schedule: Specific days, times, and locations for custody exchanges
- Holiday schedule: Allocation of major holidays, school breaks, and special occasions
- Summer vacation: Division of extended summer time between parents
- Transportation: Who provides transportation for custody exchanges
- Decision-making authority: How major decisions will be made (jointly or by one parent)
- Communication: How parents will communicate about the child and with the child during the other parent's time
- Dispute resolution: Process for resolving disagreements (mediation, parenting coordinator, etc.)
- Relocation provisions: Notice requirements if a parent wishes to move
Mandatory Mediation Requirement
South Carolina requires mediation for all contested custody cases under SCADR Rule 5(g). Courts will not schedule a contested custody trial until parents attempt mediation. Mediation costs $100-$350 per hour, with sessions typically lasting 2-4 hours. Approximately 65% of custody cases in South Carolina settle through mediation, avoiding the expense and uncertainty of trial.
Child Support for Unmarried Parents
Both unmarried parents are legally obligated to support their children financially under South Carolina law, regardless of marital status. South Carolina uses the Income Shares Model to calculate child support, which ensures children receive the same proportion of parental income they would have received if the parents lived together. The state updated its child support guidelines on January 15, 2024, increasing support amounts by approximately 25% to reflect a decade of inflation.
How Child Support Is Calculated
The Income Shares Model calculation involves:
- Determine gross monthly income for both parents from all sources
- Combine incomes and look up the basic child support obligation in the statutory schedule (maximum combined income cap: $40,000/month)
- Allocate responsibility based on each parent's percentage of combined income
- Add work-related childcare costs proportionally
- Add health insurance premiums for the child proportionally
- Credit for overnights in shared custody arrangements (109+ overnights triggers Worksheet C with 1.5 multiplier)
Special Rules for Minor Unmarried Parents
Under S.C. Code § 63-17-350, South Carolina may require grandparents to pay child support when both parents are unmarried and either parent is younger than 18. This provision ensures children of teenage parents receive adequate financial support even when the parents lack earning capacity.
Jurisdiction Requirements for Custody Cases
South Carolina must have jurisdiction to hear a custody case under the Uniform Child Custody Jurisdiction and Enforcement Act (UCCJEA), codified at S.C. Code § 63-15-101 et seq. The child must have lived in South Carolina with a parent for at least six consecutive months immediately before filing, or since birth if the child is younger than six months. Custody petitions are filed in the Family Court of the county where the child resides.
Four Bases for South Carolina Jurisdiction
| Jurisdiction Type | Requirement |
|---|---|
| Home State | Child lived in SC 6+ months with a parent |
| Significant Connection | Child and parent have significant ties to SC |
| No Other State | No other state qualifies; SC is most appropriate |
| Emergency | Child present in SC and emergency exists |
Temporary Absences
Short visits to other states do not interrupt the six-month residency requirement. Courts evaluate whether time spent outside South Carolina constitutes a temporary absence rather than a change in home state. Family vacations, visiting relatives, and similar temporary trips typically do not affect jurisdiction.
Modifying Custody Orders for Unmarried Parents
Either parent can petition to modify an existing custody order by demonstrating a substantial change in circumstances affecting the child's best interests. The filing fee for a modification petition is $150, plus $25 for any accompanying motions. South Carolina requires mandatory mediation for contested modification requests under SCADR Rule 5(g).
Grounds for Custody Modification
Common substantial changes warranting modification include:
- Parental relocation more than 100 miles from the child's residence
- Significant change in either parent's work schedule or availability
- Child's developmental needs changing with age
- Evidence of abuse, neglect, or domestic violence
- Substance abuse issues affecting parenting ability
- Major changes in the child's educational or medical needs
- One parent consistently violating the existing custody order
- The child's expressed preferences (given appropriate weight based on age and maturity)
Fee Waivers for Low-Income Parents
South Carolina residents who cannot afford filing fees may request a fee waiver using Form SCCA/400 (Motion and Affidavit to Proceed In Forma Pauperis). The $150 filing fee can be waived for households earning below 125% of federal poverty guidelines: $19,500 for a single person or $40,000 for a family of four in 2026. Approved applicants pay no filing fees for their custody action.