ACA Employer Health Insurance Mandate in South Carolina

The Affordable Care Act (ACA), codified primarily in 26 U.S.C. § 4980H and 42 U.S.C. § 18001 et seq., imposes an employer mandate on large employers. A large employer is defined as one with 50 or more full-time equivalent employees (FTE). The mandate requires these employers to offer health insurance coverage that meets minimum value (covers at least 60% of covered healthcare costs) and is affordable (employee premium contributions do not exceed 9.12% of household income as of 2024, adjusted annually).

Covered employers must offer coverage to at least 95% of full-time employees and their dependents. Failure to do so triggers shared responsibility payments (penalties) assessed by the Internal Revenue Service. The penalty is $2,700 per uncovered employee for failure to offer coverage, or $3,750 per employee if coverage offered is not affordable or does not meet minimum value standards (2024 amounts; adjusted annually for inflation).

The Internal Revenue Service (IRS) enforces the employer mandate. Small employers with fewer than 50 FTE are exempt from the mandate entirely but may claim the Small Business Health Care Tax Credit if they meet certain requirements (no more than 25 FTE, average wages under approximately $54,600 in 2024, contribution of at least 50% of employee-only premiums). No federal private right of action exists for employees to sue employers for failure to offer coverage; remedies are administered through the IRS.

South Carolina has not enacted a separate state-level employer mandate law requiring employers to provide health insurance. The state insurance code, S.C. Code § 38-99-10 et seq., establishes limited market regulations for health insurers but does not impose affirmative obligations on employers to offer coverage. This means South Carolina employers are subject exclusively to the federal ACA employer mandate (26 U.S.C. § 4980H) for large employers (50+ FTE) and the associated IRS enforcement mechanism.

South Carolina law does not strengthen or broaden the federal employer mandate. The state has not created any additional penalties, requirements, or covered categories beyond what the ACA requires federally. However, South Carolina does participate in the federal Health Insurance Marketplace (operated by the federal government at Healthcare.gov), where uninsured individuals can enroll in coverage and access premium tax credits and cost-sharing reductions.

For employers, this means compliance with federal ACA rules is sufficient; no additional state-specific paperwork, notices, or enrollment procedures are required in South Carolina beyond federal Form 1094-B and 1095-B reporting (which is federal). South Carolina does not require employers to contribute to any state health insurance fund or program.

Employees in South Carolina covered by employer plans have the same federal appeal rights and protections as all U.S. employees, including the right to appeal coverage denials through their plan's internal appeals process and external review. The state does not create supplemental employee rights or remedies for employer mandate violations; any complaint would be directed to the IRS.

Employer size threshold: 50 or more full-time equivalent employees (FTE) are subject to the mandate; employers with 49 or fewer FTE are exempt.

Coverage requirement: At least 95% of full-time employees and their dependents must be offered coverage.

Affordability threshold: 2024 employee premium contribution for self-only coverage must not exceed 9.12% of household income (adjusted annually; 2025 threshold is 9.13%).

Minimum value: Plan must cover at least 60% of total allowed costs of benefits provided.

Penalty amounts (2024): $2,700 per uncovered full-time employee (annual) or $3,750 per employee if coverage offered is unaffordable or fails to meet minimum value; indexed annually.

Small Business Tax Credit: Available to employers with 25 or fewer FTE, average wages under approximately $54,600, and paying at least 50% of employee-only premiums.

Filing deadline: IRS Form 1094-B and 1095-B must be filed by February 28 (March 31 if filed electronically) for the prior calendar year.

The ACA employer mandate contains several important exceptions and safe harbors:

Small Employer Exemption: Employers with fewer than 50 full-time equivalent employees are not subject to the mandate. Part-time employees (working fewer than 30 hours per week on average) do not count toward the 50-FTE threshold and are generally not considered full-time employees for mandate purposes.

Aggregated Employer Rules: Controlled groups, affiliated service groups, and leasing situations may aggregate employees across multiple entities. Some employers can divide their workforce and claim exemption if done properly, though the IRS scrutinizes aggressive structures.

Transitional Safe Harbors: The IRS has provided transition relief and safe harbors for certain calculation methods and timing issues, though these vary by year and situation.

Family Member Exclusions: For purposes of defining full-time employee, certain family members working in a business may be excludable.

Minimum Value Safe Harbor: If an employer relies on a third-party administrator's certification that a plan meets minimum value, the employer is protected from penalties if the certification later proves incorrect.

Affordability Safe Harbors: Employers may use safe harbor methods to measure affordability, including Form W-2 wages safe harbor, rate-of-pay safe harbor, and federal poverty line safe harbor. Using these methods provides protection from affordability penalties even if an employee's actual household income differs.

Governmental Plans Exception: Certain government employers and government retiree plans are exempt from some ACA requirements.

Religious Organization Exception: Certain religious employers are exempt from providing contraceptive coverage, though they must still offer coverage and meet affordability/minimum value standards.

South Carolina-Specific: The state has not created any additional exceptions or carve-outs. All federal exceptions apply; no state law modifies or expands them.

Step 1: Document and Calculate Compliance

Begin by identifying all employees and classifying them as full-time (averaging 30+ hours per week) or part-time. Use your payroll records and timekeeping system to calculate full-time equivalent (FTE) count for each month of the measurement period. Document which employees received an offer of coverage, the plan's monthly premium cost for self-only and family coverage, and employee contributions required. Keep records of the plan's summary of benefits and coverage, formularies, and any plan documents showing the plan meets the 60% minimum value threshold. Maintain this documentation for at least six years, as the IRS may audit. If you use a third-party administrator or broker, request written certification of affordability and minimum value calculations.

Step 2: Internal Compliance Review and Employee Communication

Conduct an internal audit to ensure coverage is offered to at least 95% of full-time employees. Review your group health insurance agreement and plan documents to confirm minimum value (60% of covered costs) is met. Calculate the employee premium contribution percentage relative to employee household income or use a safe harbor method. Document that the coverage offered is affordable under the applicable safe harbor. Provide employees with a Summary of Benefits and Coverage (SBC) at least 15 days before coverage begins and when material changes occur. Send coverage notices explaining the availability of the Marketplace and potential premium tax credits if employer coverage is unaffordable. Maintain records of all notices sent and any employee questions or complaints about coverage denial or affordability.

Step 3: File Federal Reporting Forms and Address Any Coverage Gaps

By February 28, 2025 (or March 31 if filed electronically), file IRS Form 1094-B (employer-sponsored plan transmittal) and Form 1095-B (individual coverage statement) for all employees offered coverage during 2024. If you failed to offer coverage to any full-time employees, calculate potential penalty exposure: $2,700 per uncovered employee (if no coverage offered) or $3,750 per employee (if coverage offered was unaffordable or did not meet minimum value). File corrections or amended returns (Form 1094-B and 1095-B) if errors are discovered. If you are subject to penalties, the IRS will issue a notice of liability, typically several months after the return filing deadline. South Carolina has no separate state reporting requirement; federal forms satisfy all obligations.

Step 4: IRS Investigation Process and Penalty Assessment

The IRS enforces the employer mandate through its Large Business and International (LB&I) Division and Exam function. If your employer returns are selected for examination, the IRS may request documentation of your coverage offer, employee eligibility and enrollment records, plan documents, premium payment records, and payroll records to verify FTE count and hours of service. The examination process typically takes 6 to 18 months. The IRS will calculate FTE count using a lookback measurement method (generally the prior year or a prior stability period, depending on your plan design). If the IRS determines you owe penalties, they will issue a 30-day letter allowing you to request Appeals conference. You may then pay the assessed penalty or challenge it through the Tax Court or Claims Court route. Many employers negotiate with the IRS Appeals Office and settle for reduced penalties.

Step 5: Consult an Attorney and Tax Professional

If you receive a notice of employer shared responsibility payment (penalty) or IRS examination letter, immediately consult an employment law attorney and a CPA or tax attorney experienced in ACA compliance. An attorney can help you understand your options, navigate the Appeals process, and potentially challenge the assessment. If you are in danger of losing the Small Business Tax Credit due to compliance issues, seek advice on correcting your situation. For ongoing compliance and to avoid future penalties, work with a benefits consultant or broker to ensure proper coverage offer documentation, affordability calculations, and annual form filing. If you have 50 or more FTE and currently do not offer coverage, consult counsel immediately about your mandate obligations and exposure before the IRS initiates an audit.