What is the South Carolina state income tax rate in 2026?
South Carolina taxes income in 2 brackets from 1.99% to 5.21% in 2026; the top rate starts at $30,000 of taxable income for a single filer and $30,000 for a married couple filing jointly. Example: a married couple, both 70, with $40,000 of Social Security, a $30,000 private pension and $30,000 of IRA withdrawals ($100,000 in all; the pension and IRA money split evenly between them) owes $76 of South Carolina income tax (0.1% of their income) and $5,087 of federal tax; a single 62-year-old with $24,000 of Social Security, an $18,000 pension and $18,000 of IRA withdrawals ($60,000 in all) owes $425 to South Carolina and $4,111 federal. The schedule, how South Carolina treats each kind of retirement income, and its local taxes follow.
| Rate | Single | Married filing jointly |
|---|---|---|
| 1.99% | $0 to $30,000 | $0 to $30,000 |
| 5.21% | over $30,000 | over $30,000 |
How South Carolina taxes retirement income in 2026
| Standard deduction or personal exemption | $15,000 single, $30,000 married filing jointly, $22,500 head of household. The standard deduction phases out ratably as income rises above $40,000 (single) and $80,000 (MFJ), reaching zero $55,000 and $110,000 above those points; head of household from $60,000 over $82,500. The phase-out's reduction is rounded down to a multiple of $10 before it is taken. (South Carolina Department of Revenue; rules) |
|---|---|
| Social Security | Social Security benefits are fully exempt: none of the federally taxable amount enters the state base. (South Carolina General Assembly; rules) |
| Pensions, annuities and IRA/401(k) withdrawals | Pension, annuity and IRA/401(k) distributions: up to $3,000 excluded per taxpayer ($6,000 MFJ) at any age. (South Carolina General Assembly; rules) |
| Age 65 and older | At age 65 or older: $15,000 is subtracted from the base ($30,000 for a married couple filing jointly when both qualify), against any income. (South Carolina General Assembly; rules) |
| Capital gains | 56% of net long-term gain enters the base (44% is excluded) and is taxed at ordinary rates. Short-term gains are ordinary income. (South Carolina General Assembly; rules) |
Local income taxes: none in South Carolina. The local income taxes the tax engine computes for 2026 are in Delaware, Indiana, Iowa, Kentucky, Maryland, Michigan, Missouri, New York, Ohio, Oregon and Pennsylvania.
Your whole 2026 return in South Carolina, federal and state together, ends in a refund or an amount owed: 2026 tax return calculator (free) → What five typical retiree households owe or get back in South Carolina and every other state: the 2026 tax return study.
Figures for 2026 from QuantCalc’s open tax engine (federal 2.6.1, state 1.28.0), for a full-year resident. An estimate, not tax advice: credits, itemized deductions and rules this page does not ask about change a real return. Every South Carolina rule with its official sources: South Carolina rules and sources.
In QuantCalc's 51-state planner study — one married couple, both 60, $2M, $80,000 a year to spend after tax, 10,000 paths per jurisdiction — the median path in South Carolina pays $212,092 of federal and state income tax and Medicare IRMAA over 30 years, $49,028 of it South Carolina state income tax, $49,495 more than in the 16 jurisdictions that charge this couple no state tax. That ranks #27 of 51 by lifetime tax (1 = lowest). The plan succeeds in 83.14% of paths. State tax is part of the optimization here — the playbook below shows the federal-state-ACA stack.
The SC verdict
For a retiree planning withdrawals in 2026, South Carolina is a middle-of-the-road state for retirement taxation. A senior deduction against any income from age 65, and Social Security fully exempt.
South Carolina has no dollar-capped retirement-income exclusion, so every converted dollar enters the state tax base. The marginal cost of a conversion here is the federal bracket plus the state rate plus, below 65, whatever premium tax credit crossing the 400% FPL cliff would cost you.
Worked example: $30k Roth conversion in South Carolina
Consider a married couple age 58 in South Carolina with $75,000 of wages (their MAGI), both on ACA Marketplace coverage. They want to convert $30,000 from a traditional IRA to a Roth. The South Carolina state tax on that conversion is $1,605 — 5.3% of the amount converted; $6,000 of it falls inside South Carolina's retirement-income exclusion. Federal income tax adds another $3,600 — the whole conversion is taxed in the federal 12% bracket. And because the conversion pushes their MAGI to $105,000 — over the 400% FPL cliff of $84,600 — they lose their full ACA premium tax credit, $19,517 a year at South Carolina's average benchmark Silver premium. Total cost of the $30,000 conversion: $24,722, or an effective 82.4% marginal rate. Each South Carolina tax figure for a conversion on this page is QuantCalc's state tax engine run on the couple's whole 2026 South Carolina return twice, without the conversion and with it, with every amount split evenly between the two spouses, so South Carolina's own brackets, deductions, exemptions and credits are all applied. The federal-state-ACA stack matters in South Carolina.
Cost breakdown
| Component | Amount |
|---|---|
| Federal income tax (12% bracket) | $3,600 |
| South Carolina state income tax | $1,605 |
| ACA premium tax credit clawback | $19,517 |
| Total cost on $30,000 conversion | $24,722 (82.4% effective) |
Scenario B (moderate): cliff-aware $34.6k conversion in South Carolina
A South Carolina couple aged 60, both on Marketplace coverage with $50K wages converts $34,600, which lifts their MAGI to exactly the $84,600 400% FPL cliff: still eligible, and they keep a premium tax credit of $20,319 a year. One more dollar of conversion would cost all of it. State tax: $1,232 — 3.6% of the amount converted; $6,000 of it falls inside South Carolina's retirement-income exclusion. Federal income tax added: $4,012 (the whole conversion is taxed in the federal 10%–12% brackets). ACA PTC preserved. Total cost: $5,244, or 15.2% effective. In moderate-tax states, the conversion size is bounded by both the IRMAA two-year lookback and the ACA cliff — not state tax alone.
What the planner's Monte Carlo says about South Carolina
QuantCalc Research ran one married couple through QuantCalc's retirement planner in each of the 51 jurisdictions: both 60, $2,000,000 ($1,400,000 traditional, $600,000 Roth), a 60/40 portfolio, $80,000 a year to spend after tax for 30 years, no Social Security, 10,000 paths each. The planner's federal and state tax engines price every year, and it picks the withdrawals and Roth conversions. Here is South Carolina beside the lowest- and highest-tax results:
| Metric | South Carolina | No state tax (16 jurisdictions) | Oregon (highest) |
|---|---|---|---|
| Median lifetime tax, federal + state + IRMAA (30y) | $212,092 | $162,597 | $309,718 |
| State income tax (30y, sum of yearly medians) | $49,028 | $0 | $146,914 |
| State income tax in the first year (age 60) | $1,861 | $0 | $5,838 |
| 30-year success rate | 83.14% | 84.05% | 80.61% |
| Median balance at 90 | $2,051,661 | $2,153,150 | $1,801,272 |
| Rank by lifetime tax (of 51, 1 = lowest) | #27 | #1 | #51 |
Across all 51 jurisdictions the success rate runs from 80.61% to 84.05%: for this couple the state changes the tax bill far more than the odds of the money lasting. Dollars are today's dollars. Source: QuantCalc 51-State Retirement Monte Carlo (v2026.3, re-run 2026-10-12) — 510,000 planner paths, methodology and dataset released CC-BY-4.0. Every jurisdiction's row uses the same household and the same market paths; only the state of residence changes.
How South Carolina treats capital gains in retirement
South Carolina taxes only 56% of a net long-term capital gain, at its ordinary rates (top 5.21% in 2026), so the effective top state rate on a long-term gain is about 2.92%. Short-term gains are taxed in full as ordinary income. That stacks on top of federal LTCG (0%/15%/20%) and the 3.8% NIIT for high earners. A 'free' federal 0% LTCG harvest still costs you up to about 2.92% at the state level. (South Carolina General Assembly; rules)
Why the ACA cliff hits hard in South Carolina
The 400% federal-poverty-level cliff is federal, not state-specific — but its dollar impact depends on the benchmark Silver-plan premium in your county. South Carolina's Marketplace pricing and your household composition determine the size of the subsidy at risk. A couple aged 58 with MAGI of exactly $84,600 still has $18,561 a year of premium tax credit at South Carolina's average benchmark Silver premium, and all of it is on the line. With the 2021–2025 enhanced credit expired, $1 of additional MAGI above 400% FPL eliminates the entire credit.
For 2026 the 400% FPL threshold is:
Roth conversion strategy for South Carolina
The SC-specific playbook depends on tier:
- Identify your cliff distance. Compute MAGI from all income sources (wages, capital gains, interest, dividends, traditional withdrawals). Find your headroom under 400% FPL. Use the live cliff widget above for a quick check.
- Stay under the cliff if you can. In South Carolina at 5.21%, the marginal cost of going over the cliff is federal tax + state tax + full PTC clawback. The break-even conversion size is smaller than in tax-free states.
- If you must go over, convert big. Once you've crossed the cliff, additional conversion dollars only cost federal + state tax (no incremental PTC loss). A "rip the bandage" conversion year can be efficient if you have many traditional dollars to move.
- Coordinate with capital gains and the 0% LTCG bracket. South Carolina taxes only 56% of a net long-term capital gain, at its ordinary rates (top 5.21% in 2026), so the effective top state rate on a long-term gain is about 2.92%. Short-term gains are taxed in full as ordinary income. That stacks on top of federal LTCG (0%/15%/20%) and the 3.8% NIIT for high earners. A 'free' federal 0% LTCG harvest still costs you up to about 2.92% at the state level. (South Carolina General Assembly; rules)
- Plan ahead for IRMAA. The IRMAA Medicare premium surcharge has a 2-year lookback. A South Carolina resident in their early 60s converting today will see IRMAA implications at 65. See RMD + IRMAA calculator for the lookback math.
State tax basics for South Carolina retirees
| Question | South Carolina |
|---|---|
| State income tax | 5.21% top marginal |
| Number of brackets | 2 |
| Social Security taxed | No |
| 401(k) / Traditional IRA taxed | Yes |
| Retirement-income exclusion (couple) | None |
| Roth conversion draws that exclusion | Not applicable |
| State estate / inheritance tax | No |
| Retirement-friendliness tier | moderate |
| Notable feature | a senior deduction against any income from age 65, and Social Security fully exempt |
| 30-yr planner success rate | 83.14% |
| Median 30-yr tax, federal + state + IRMAA (rank) | $212,092 (#27/51) |
Model your full South Carolina retirement scenario
Free Monte Carlo (100 paths per run; 10,000 with PRO) with state-specific tax engine, ACA cliff, Roth conversion optimizer, IRMAA lookback — free, no signup.
Run a free simulation →What a year-end move does to your South Carolina and federal tax in 2026
Each move changes three bills at once: the federal return, the South Carolina return and, for anyone on Medicare, the IRMAA surcharge the 2026 income sets for 2028. Example: a married couple, both 72, with a $40,000 pension, $50,000 of Social Security, a $30,000 IRA withdrawal and $10,000 of long-term gains already realized in 2026, the pension, the IRA money and the conversion split evenly between them on the state return. Each row is that year with one move made, against the same year without it (negative = less tax).
| Move (by December 31, 2026) | Federal tax | South Carolina tax | IRMAA in 2028 |
|---|---|---|---|
| Convert $25,000 to a Roth IRA | $3,165 | $1,571 | $0 |
| Send $10,000 of the IRA withdrawal to charity as a QCD | −$1,200 | −$252 | $0 |
| Harvest a $5,000 loss against the year's gains | $0 | −$81 | $0 |
An estimate from QuantCalc’s open tax engine (federal 2.6.1, state 1.28.0) for the 2026 tax year. Not tax advice: your return depends on facts this page does not ask about, so check a move with your tax preparer or custodian before acting. IRMAA uses the 2026 tiers for two people on Medicare; the 2028 tiers are not published yet. How the engine computes each line, with its official source: federal, South Carolina.
Related calculators and reading
- All-states retirement tax comparison — see South Carolina alongside the other 50 jurisdictions.
- South Carolina minimum wage 2026 — the hourly rate, scheduled increases and take-home pay after tax, from the official sources.
- State Retirement Tax Data 2026 — the per-jurisdiction rate, exclusion and Social Security figures behind this page, as CSV and JSON.
- South Carolina side by side with another state's retirement taxes: New York vs South Carolina · North Carolina vs South Carolina · South Carolina vs Florida.
- ACA Subsidy Cliff Optimizer — find the largest Roth conversion that keeps you under 400% FPL.
- Roth Conversion Optimizer — bracket-fill vs. fixed-amount strategy comparison.
- RMD + IRMAA Calculator — Medicare premium surcharge based on 2-year-old MAGI.
- Safe Withdrawal Rate Calculator — sequence-of-returns-aware withdrawal planning.
- Research: 51-State 30-year Monte Carlo (2026) — full ranking and dataset.
- Research: Monte Carlo ACA Cliff 2026 — 80,000-path study of the cliff cost.
FAQ
What is the South Carolina state income tax rate in 2026?
South Carolina taxes income in 2 brackets from 1.99% to 5.21% in 2026; the top rate starts at $30,000 of taxable income for a single filer and $30,000 for a married couple filing jointly. The full schedule and South Carolina's deductions are on this page (South Carolina General Assembly; rules).
How much state income tax does a retiree pay in South Carolina?
It depends on the kind of income. In 2026, a married couple, both 70, with $40,000 of Social Security, a $30,000 private pension and $30,000 of IRA withdrawals ($100,000 in all; the pension and IRA money split evenly between them) owes $76 of South Carolina tax, and a single 62-year-old with $24,000 of Social Security, an $18,000 pension and $18,000 of IRA withdrawals ($60,000 in all) owes $425. Federal tax comes on top: $5,087 and $4,111.
Does South Carolina tax Social Security benefits?
No. Social Security benefits are fully exempt: none of the federally taxable amount enters the state base. (South Carolina General Assembly; rules)
Does South Carolina tax pensions, 401(k) and IRA withdrawals?
Pension, annuity and IRA/401(k) distributions: up to $3,000 excluded per taxpayer ($6,000 MFJ) at any age. (South Carolina General Assembly; rules)
Does South Carolina have local income taxes?
No. No county, city or school district in South Carolina levies an income tax that the tax engine computes for 2026.
Does South Carolina tax Roth conversions?
Yes. A $30,000 conversion by a couple aged 58 with $75,000 of wages adds $1,605 of South Carolina tax — 5.3% of the amount converted; $6,000 of it falls inside South Carolina's retirement-income exclusion — on top of federal tax and any ACA subsidy clawback. Each South Carolina tax figure for a conversion on this page is QuantCalc's state tax engine run on the couple's whole 2026 South Carolina return twice, without the conversion and with it, with every amount split evenly between the two spouses, so South Carolina's own brackets, deductions, exemptions and credits are all applied.
What is South Carolina's 30-year Monte Carlo retirement success rate?
In QuantCalc's 51-state planner study, one married couple (both 60, $2M, 60/40, $80,000 a year to spend after tax, 10,000 paths) succeeds in 83.14% of paths in South Carolina; across all 51 jurisdictions the rate runs from 80.61% to 84.05%. The median path pays $212,092 of federal and state income tax and IRMAA over 30 years, $49,028 of it South Carolina state income tax.
What is the ACA cliff in South Carolina for 2026?
The ACA premium-tax-credit cliff is a federal threshold, not state-specific. For a household of two in 2026, it sits at 400% of the federal poverty level — $84,600. Crossing it by even $1 of MAGI eliminates the full subsidy now that the 2021-2025 enhanced credit has expired.
Is South Carolina a good state to retire for tax purposes?
South Carolina is a middle-of-the-road state for retirement taxation. A senior deduction against any income from age 65, and Social Security fully exempt. In our planner study it ranks #27 of 51 by median lifetime tax (1 = lowest).
Does South Carolina have a state estate or inheritance tax?
No — South Carolina does not impose a state-level estate or inheritance tax.
How does South Carolina tax capital gains?
South Carolina taxes only 56% of a net long-term capital gain, at its ordinary rates (top 5.21% in 2026), so the effective top state rate on a long-term gain is about 2.92%. Short-term gains are taxed in full as ordinary income. That stacks on top of federal LTCG (0%/15%/20%) and the 3.8% NIIT for high earners. A 'free' federal 0% LTCG harvest still costs you up to about 2.92% at the state level. (South Carolina General Assembly; rules)
Last updated 2026-11-05. State income tax figures reflect the 2026 schedule published by South Carolina's tax authority. ACA poverty-level figures: the 2025 HHS poverty guidelines for the 48 contiguous states and DC ($15,650 for one person, plus $5,500 for each additional person; 90 FR 5917), which set 2026 Marketplace coverage. Premium tax credit estimates use South Carolina's average benchmark Silver premium. Monte Carlo numbers from the QuantCalc 51-state planner study (v2026.3, re-run 2026-10-12, CC-BY-4.0). This page is educational. Not tax, legal, or financial advice — consult a qualified advisor.