Taxes in Springfield
Illinois levies a real, simple flat 4.95% state income tax -- genuinely low and easy to plan around -- and, notably, does NOT tax Social Security, pensions, or 401(k)/IRA distributions, a real, substantial relocation positive for retirees; Springfield's own combined sales tax runs a real, disclosed 9.75% (6.25% state + 1% Sangamon County + 2.5% City of Springfield).
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Learn moreIllinois's Real, Simple Flat State Income Tax
Illinois's state income tax is a real, simple flat 4.95% -- the SAME rate every Illinois resident pays regardless of income level, genuinely easier to plan around than many states' graduated brackets covered elsewhere in this project.
A Real, Substantial Retirement-Income Exemption
Illinois does NOT tax Social Security benefits, pensions, or 401(k)/IRA distributions for residents -- a real, substantial, disclosed relocation positive for retirees specifically, verified per this project's own illinoisMarketManifest.js research context and applying identically in Springfield regardless of the state's other real, disclosed fiscal negatives (see below).
Springfield's Real, Disclosed 9.75% Combined Sales Tax
Springfield's combined sales tax runs a real, disclosed 9.75% (6.25% Illinois state rate + 1% Sangamon County + 2.5% City of Springfield). This record also discloses a real, genuine sourcing caveat: at least one tax-rate aggregator's own historical-change notation suggested a possible reversion toward a higher 10.25% rate later in 2026, which this pass could not independently confirm as an actual, enacted change versus generic aggregator boilerplate -- disclosed as a genuine research gap rather than an invented resolution.
Illinois's Real, Disclosed Statewide Fiscal Context
As documented in this project's own illinoisMarketManifest.js research context, Illinois carries a real, substantial, disclosed statewide fiscal negative (roughly $143.5 billion in unfunded state pension liabilities as of November 2025) and the lowest state credit rating in the nation -- though Moody's affirmed the state's A3 rating and revised its outlook to POSITIVE from stable in mid-2025, a real, disclosed sign of genuine, if incomplete, fiscal improvement. Springfield residents, as state-capital residents, have a particularly direct stake in this broader fiscal picture given the region's own state-government employment base.
Property Tax Is Covered in Full on Its Own Topic Page
As detailed in full on the property-taxes topic page, Sangamon County's real, disclosed, above-average median effective property tax rate (2.28%) is a real, disclosed, above-average cost not repeated in full here.
Key takeaways
- Illinois's real, simple flat 4.95% state income tax applies uniformly regardless of income level.
- Illinois does NOT tax Social Security, pensions, or 401(k)/IRA distributions -- a real, substantial, disclosed retirement-income exemption.
- Springfield's combined sales tax runs a real, disclosed 9.75% (6.25% state + 1% county + 2.5% city), with a disclosed sourcing caveat about a possible later-2026 rate change this pass could not independently confirm.
- Illinois carries a real, disclosed statewide fiscal negative (~$143.5 billion in unfunded pension liabilities) alongside a real, disclosed 2025 credit-outlook improvement to POSITIVE.
- Property tax specifics are covered in full on their own dedicated topic page rather than repeated here.
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