In South Carolina, your 2026 ACA subsidy is calculated by subtracting your expected contribution (a percentage of your household income set by law) from the cost of the second-lowest-cost Silver plan in your area. For the 2026 plan year, premium tax credits are available to South Carolina households earning between 100% and 400% of the Federal Poverty Level, which is roughly $15,650 to $62,600 for a single person and $32,150 to $128,600 for a family of four. The enhanced subsidies that capped premiums at 8.5% of income expired on December 31, 2025, so the 400% income cliff has returned and required contribution percentages are higher than they were in 2025.
This guide explains how the subsidy math works, the exact income limits by household size, and how to estimate your credit before you shop on HealthCare.gov.
How the South Carolina ACA Subsidy Is Calculated
A premium subsidy, formally called the Advance Premium Tax Credit (APTC), lowers your monthly health insurance premium. The formula has three parts:
- Your benchmark plan cost. This is the second-lowest-cost Silver plan available to you in your South Carolina county. It varies by age, location, and household size.
- Your required contribution. This is the maximum share of your household income the government expects you to pay toward the benchmark plan. It is set on a sliding scale tied to your income as a percentage of the Federal Poverty Level (FPL).
- The subsidy. Your subsidy equals the benchmark plan cost minus your required contribution. If the benchmark plan costs more than your required contribution, you get a credit for the difference.
Here is the plain-English version: the lower your income, the smaller the percentage you are expected to pay, and the larger your subsidy. The credit can be applied to any metal-level plan (Bronze, Silver, Gold, Platinum), not just the benchmark Silver plan.
2026 South Carolina ACA Income Limits by Household Size
Subsidy eligibility for the 2026 plan year is based on the 2025 Federal Poverty Guidelines. To qualify for any premium tax credit, your projected 2026 income generally needs to fall between 100% and 400% of FPL.
| Household Size | 100% FPL (subsidy floor) | 400% FPL (subsidy ceiling) |
|---|
| 1 | $15,650 | $62,600 |
| 2 | $21,150 | $84,600 |
| 3 | $26,650 | $106,600 |
| 4 | $32,150 | $128,600 |
| 5 | $37,650 | $150,600 |
| 6 | $43,150 | $172,600 |
| 7 | $48,650 | $194,600 |
| 8 | $54,150 | $216,600 |
If your income lands above these ceilings, you pay the full unsubsidized premium in 2026. This is the "subsidy cliff" that returned after the enhanced credits expired. Even one dollar over 400% FPL can mean losing thousands of dollars in annual assistance, so estimating your income carefully matters more in 2026 than it did in prior years.
2026 Required Contribution Percentages
The applicable percentage is the share of income you are expected to pay toward the benchmark plan. These figures rose sharply for 2026 compared to the enhanced-subsidy years. The table below shows the approximate 2026 percentages set by the IRS.
| Income (% of FPL) | Approximate share of income you pay |
|---|
| Under 133% | About 2.10% |
| 133% to 150% | About 3.14% to 4.19% |
| 150% to 200% | About 4.19% to 6.60% |
| 200% to 250% | About 6.60% to 8.44% |
| 250% to 300% | About 8.44% to 9.96% |
| 300% to 400% | About 9.96% (flat) |
| Over 400% | No cap, full premium |
To estimate your required contribution, multiply your annual household income by the percentage that matches your income band. That dollar figure is roughly what you would pay per year for the benchmark Silver plan. Anything above that, up to the benchmark cost, is covered by your subsidy.
A Simple Worked Example
Take a 40-year-old single adult in Richland County, South Carolina, earning $30,000 in 2026. That income is about 192% of FPL for a household of one.
- Applicable percentage at 192% FPL: roughly 6.3%
- Required annual contribution: $30,000 x 0.063 = about $1,890 per year, or roughly $158 per month
- If the benchmark Silver plan costs $560 per month, the subsidy is about $560 minus $158, or roughly $402 per month
The person could apply that $402 monthly credit to a cheaper Bronze plan and potentially pay very little, or keep the Silver plan and gain cost-sharing reductions (more on that below). Actual figures depend on your county, age, and the plans available, so always confirm on HealthCare.gov.
Cost-Sharing Reductions: Extra Savings Up to 250% FPL
Premium subsidies are not the only help available. Cost-sharing reductions (CSRs) lower your deductibles, copays, and out-of-pocket maximums. In South Carolina, CSRs are available to households earning up to 250% of FPL, but only if you enroll in a Silver-level plan.
| Income (% of FPL) | CSR benefit |
|---|
| 100% to 150% | Strongest CSR, lowest out-of-pocket costs |
| 150% to 200% | Strong CSR |
| 200% to 250% | Moderate CSR |
| Over 250% | No CSR |
If your income qualifies you for CSRs, a Silver plan is usually the better value than Bronze, because the Silver plan comes with those built-in cost reductions on top of your premium subsidy.
The South Carolina Coverage Gap: Below 100% FPL
South Carolina has not expanded Medicaid under the ACA. This creates a coverage gap that affects the subsidy calculation for lower-income residents.
Marketplace subsidies only start at 100% FPL because the law assumed Medicaid would cover people below that line. In South Carolina, adults without a qualifying category (such as pregnancy, disability, or dependent children) often cannot get Medicaid, and parents qualify only at very low income levels. That leaves an estimated 100,000-plus South Carolinians earning too much for Healthy Connections Medicaid but too little for marketplace subsidies.
If your projected income is below 100% FPL, the calculator will not show a subsidy. If you expect your income to reach at least 100% FPL for the year, you may qualify for a full or near-full subsidy. If you fall into the gap, community health centers and free clinics are often the most practical options. You can also check whether you qualify for Healthy Connections Medicaid through another category.
For state Medicaid rules, see our South Carolina benefits guide.
How to Estimate and Apply for Your 2026 Subsidy
Follow these steps to get an accurate subsidy estimate and enroll:
- Project your 2026 household income. Use your Modified Adjusted Gross Income (MAGI), which includes wages, self-employment income, Social Security, and most other taxable income for everyone on your tax return.
- Determine your household size. Count yourself, your spouse if filing jointly, and anyone you claim as a tax dependent.
- Find your FPL percentage. Divide your projected income by the 100% FPL figure for your household size from the table above, then multiply by 100.
- Estimate your required contribution. Multiply your income by the applicable percentage for your income band.
- Look up your benchmark plan. Go to HealthCare.gov, enter your ZIP code and details, and view the second-lowest-cost Silver plan for your area.
- Subtract to find your subsidy. Benchmark cost minus your required contribution equals your estimated monthly credit.
- Apply through HealthCare.gov. South Carolina uses the federal marketplace. Create an account, complete the application, and the system calculates your exact subsidy automatically.
You can enroll during Open Enrollment or after a qualifying life event (job loss, marriage, birth of a child, moving) that triggers a Special Enrollment Period.
What Changed for 2026
Several factors make 2026 different from recent years, and they all affect your subsidy amount:
- Enhanced subsidies expired. The American Rescue Plan and Inflation Reduction Act enhancements ended December 31, 2025. The 8.5% income cap for higher earners is gone.
- The 400% cliff is back. Households above 400% FPL receive zero premium assistance in 2026.
- Required contributions rose. The percentage of income you pay toward the benchmark plan increased across most income bands, so net premiums are higher.
- No repayment cap. For tax years after 2025, if you underestimate your income and receive too much advance credit, you must repay the full excess at tax time with no cap. Estimating income accurately protects you from a surprise tax bill.
Because premiums and subsidy percentages both shifted, the smart move for 2026 is to recheck your estimate rather than assume last year's numbers still apply.
Frequently Asked Questions
What income qualifies for an ACA subsidy in South Carolina in 2026?
For the 2026 plan year, a single person generally qualifies with income between about $15,650 and $62,600, and a family of four qualifies between about $32,150 and $128,600. These figures represent 100% to 400% of the Federal Poverty Level. Income below 100% FPL usually does not qualify because South Carolina has not expanded Medicaid.
Did ACA subsidies get smaller in South Carolina for 2026?
Yes, for most people. The enhanced premium tax credits that were in place from 2021 through 2025 expired at the end of 2025. As a result, the required contribution percentages rose, the 400% income cliff returned, and net premiums increased for many enrollees. You may still qualify for a meaningful subsidy, but the amount is generally lower than in 2025 at the same income.
How do I calculate my South Carolina ACA subsidy?
Take the cost of the second-lowest-cost Silver plan in your county, then subtract your required contribution (your household income multiplied by the applicable percentage for your income band). The result is your estimated monthly premium tax credit. HealthCare.gov performs this calculation automatically when you apply.
Can I get a subsidy if I make over 400% of the poverty level?
No. For the 2026 plan year, households earning above 400% FPL do not qualify for any premium tax credit. This is roughly $62,600 for a single person and $128,600 for a family of four. If your income is near that line, small changes can affect eligibility, so estimate carefully.
What is the South Carolina coverage gap?
Because South Carolina did not expand Medicaid, adults earning below 100% FPL often cannot get Medicaid and also cannot get marketplace subsidies, which start at 100% FPL. This leaves an estimated 100,000-plus residents without an affordable coverage option. If you expect to earn at least 100% FPL for the year, you may qualify for a marketplace subsidy instead.
Where do South Carolina residents apply for ACA plans?
South Carolina uses the federal marketplace at HealthCare.gov. You can create an account, complete an application, compare plans, and see your exact subsidy there. Free local help is available through certified navigators and enrollment assisters.
Do cost-sharing reductions apply in South Carolina?
Yes. Households earning up to 250% FPL can get cost-sharing reductions that lower deductibles, copays, and out-of-pocket maximums, but only on Silver-level plans. If your income qualifies, a Silver plan is often a better value than Bronze because of these added savings.
