Illinois exempts all retirement income from state income tax. That changes the comparison. The case for moving to Greenville SC from Illinois is about property tax relief — and the property tax argument is still compelling. Here's the honest math.
Illinois exempts Social Security, pension income, and IRA/401(k) distributions from state income tax entirely. South Carolina does not — SC taxes retirement income at 6.5% flat (with deductions: $10,000 per person for retirement income, additional senior deductions for 65+, and Social Security is exempt in SC too). For many Illinois retirees, moving to SC means paying state income tax on retirement income they currently pay nothing on. For a couple with $80,000 in combined pension/IRA income, that could mean $2,000–$4,000/year in SC income tax they currently don't pay at the state level. This is the honest math — and it means the income tax argument for Illinois retirees is not in SC's favor. Property tax is where the SC advantage lives.
| Factor | Illinois (Suburban Chicago) | Greenville, SC |
|---|---|---|
| Property Tax on $450K Home (65+) | $7,650–$12,600/yr (Cook/DuPage/Lake ranges) | ~$4,720/yr (4% assessment + homestead credit) |
| State Income Tax on Pension/IRA | Illinois: FULLY EXEMPT — $0 state income tax on all retirement income | SC: taxed at 6.5%; $10K/person deduction; est. $2,000–$5,000/yr for typical retired couple |
| State Income Tax on Social Security | Illinois: fully exempt | SC: fully exempt |
| Net Tax Position (property + income) | High property taxes; zero income tax on retirement income | Lower property taxes; some income tax — net savings depends on home price and income level |
| Home Price Baseline | $350K–$650K (Naperville, Wheaton, Barrington) | $280K–$640K; equity conversion often produces mortgage-free purchase |
| Climate | Harsh winters; real cold from November through March | Mild winters; Greenville averages 2–4 inches snow/year total |
For a retired Illinois couple with $100,000 in combined pension/IRA income (typical for DuPage County professionals or former municipal employees): Illinois taxes $0 of that income. South Carolina taxes approximately $80,000 of it after the $10,000 per-person deduction (assuming Social Security is excluded from both) at 6.5% = approximately $5,200/year in SC income tax they're currently not paying. Against that: property tax savings of approximately $5,000–$8,000/year depending on home value. For homeowners in the $450K–$550K range, the net is roughly break-even on combined tax burden — the SC advantage comes from equity conversion, lower carrying cost on a paid-off home, and climate. At higher home values ($600K+), the property tax savings in SC start to clearly outpace the income tax increase. At lower income levels (under $60K combined), the income tax impact shrinks and the property tax savings dominate. The calculation is individual — which is why you need a tax professional who knows both states before deciding.
Despite the income tax headwind, Illinois retirees who fit these profiles often find the Greenville SC move worthwhile:
High home value sellers. Naperville, Barrington, Lake Forest homeowners selling $700,000–$1,200,000 homes pay $14,000–$24,000+/year in property taxes. The SC savings at those price points overwhelm the income tax cost. And the equity typically eliminates the SC mortgage entirely.
Lower retirement income. Retirees with under $60,000 in combined retirement income hit the SC deductions ($10K per person = $20K couple) at a level where the effective SC income tax is minimal — 1–2% on income above the deduction. Property tax savings dominate at this income level.
Climate-driven movers. For Illinois retirees who have decided they're done with Chicago winters regardless of tax math, Greenville SC delivers what they want. The net tax cost of the move for most middle-income retirees is modest — $1,000–$3,000/year net negative on taxes — but the quality of life gain from a manageable climate is ongoing and subjective but real.
The key message for Illinois buyers: Don't let any broker or website tell you Greenville SC saves you income taxes — that's not accurate for most Illinois retirees. The savings are in property taxes and potentially in carrying cost. Run your specific numbers honestly before deciding.
Get the full picture — property tax savings, income tax impact at your income level, and a net calculation before you decide. We give you the real numbers, not just the ones that favor the move.
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