Name: Illinois retirement income, contributions and benefits — October 24, 2026
Creator: RothIRAHub
Published: 2026-10-24
License: https://www.rothirahub.com/about/terms-of-service/

For an Illinois saver, three questions deserve separate answers: Does the contribution reduce income today? Is the later distribution taxable? Could the transaction affect another benefit? Illinois subtracts eligible retirement income, including federally taxable Roth conversions, but those other questions do not disappear. [1] [2] [7]

Illinois subtracts eligible conversion income

Illinois starts with federal adjusted gross income (AGI), then makes state adjustments. 35 ILCS 5/203(a)(2)(W) expressly subtracts federally included amounts converted from a regular IRA to a Roth IRA. The provision applies from 1998 and contains no age limit, dollar cap or income phase-out. IDOR Publication 120 also identifies traditional-to-Roth conversions as eligible retirement income. [1]

The subtraction removes the federally taxable conversion amount from the Illinois income-tax base; it does not erase the federal conversion income. A qualified Roth withdrawal is already excluded from federal income. Pub 120 also permits subtraction of federally taxable early distributions from qualified plans and IRAs. Federal early-distribution taxes and Roth ordering/five-year rules still apply. [1] [3]

For eligible qualified-plan rollovers and governmental 457 distributions, follow Pub 120 and the transaction's federal reporting. Do not assume every payment labeled “deferred compensation” qualifies. The currently available 2025 IL-1040 instructions place eligible retirement income on Line 5; use the final instructions for the year you file and do not subtract income twice. [1] [19]

Contributions: compare the alternative you can actually use

Illinois does not impose a separate tax for choosing a Roth. A Roth contribution does not generate a federal deduction. A deductible Traditional IRA contribution can reduce federal AGI and therefore Illinois income; eligible pre-tax workplace deferrals can reduce wages included in AGI. A nondeductible Traditional IRA contribution does not provide that current deduction. [2] [5]

Current Illinois income-tax effect of regular IRA contributions
Contribution	Current deduction effect	Condition to check
Roth IRA	No deduction for the contribution	Roth income eligibility, compensation and shared IRA contribution limit
Deductible Traditional IRA	Deduction can reduce Illinois income through federal AGI	Actual federal deductibility and enough taxable income to use the reduction
Nondeductible Traditional IRA	No current contribution deduction	Basis reporting and later federal distribution/conversion treatment

Illustration: an eligible saver under 50 contributes $7,500 in 2026 and can deduct that entire amount in a Traditional IRA. If the deduction reduces otherwise taxable Illinois income dollar for dollar, $7,500 × 4.95% = $371.25 less Illinois tax before return rounding, ignoring other credit or benefit effects. Choosing Roth would forgo that current saving. If the Traditional contribution is not deductible, this deduction-based difference is absent. This is not a lifetime investment-return comparison. [4] [2] [5]

A workplace pre-tax alternative is not always available for every dollar: plan terms, eligibility and contribution limits matter, and certain higher-wage participants' catch-up contributions must be Roth beginning in 2026. Federal tax treatment, time horizon and future residence also matter; the Illinois deduction alone does not identify a universally better account. [6] [2]

A conversion can still affect Illinois benefits

The Illinois retirement subtraction does not lower the federal AGI used by some state income tests. The personal exemption allowance, Illinois property-tax credit and K–12 education expense credit are unavailable when federal AGI exceeds $500,000 for married filing jointly or $250,000 for all other filing statuses. Reaching the limit is different from exceeding it. [7] [8]

A federally taxable conversion can cross those limits even though Illinois subtracts the conversion income. Any tax increase depends on benefits you otherwise qualify for and could use. The property-tax credit, for example, is generally 5% of qualifying property taxes, not 5% of every housing expense. Losing a credit or exemption can also change estimated-payment needs; the retirement subtraction alone does not prove that total Illinois liability stays unchanged. [8] [7]

Senior assessment freeze: keep the three years straight

Income, assessment and bill-payment years
Assessment year	Household income tested	Income cap	Taxes payable
2026	2025 income	$75,000	2027
2027	2026 income	$77,000	2028

A taxable conversion in 2026 therefore belongs in the income review for the 2027 assessment, not the 2026 assessment. Household income is broader than Illinois taxable income. PTAX-340 specifically includes federally taxable IRA income and amounts converted to Roth; a qualified, federally tax-free Roth distribution is not the same thing as taxable conversion income. [10] [11] [9]

The freeze protects qualifying assessed value, not a guaranteed tax bill. Tax rates or improvements can still increase the bill. Applicants must meet age, household-income, property-interest, residence and tax-liability requirements. The general and senior homestead exemptions are separate programs; they too have requirements beyond simply occupying a home or reaching age 65. Check the county assessor's application for your assessment year. [9] [10]

Estate tax is different from Roth income tax

Illinois's estate-tax exclusion threshold is $4 million. The Attorney General requires Form 700 when the gross estate plus adjusted taxable gifts exceeds that amount, even if a federal estate-tax return would not otherwise be required. A filing requirement is not the same as the final tax bill: deductions, prior gifts and asset location affect the calculation. [12] [13]

A Roth IRA's income-tax treatment does not remove the owner's retirement interest from gross-estate analysis. Do not treat the account balance as automatically equal to taxable estate after deductions. Illinois uses an interrelated estate-tax calculation; it is not reliably modeled by multiplying the amount over $4 million by one flat rate. [14] [13]

The Attorney General's published illustrations depend on their stated inputs. They are not a guaranteed tax estimate or a promised saving from moving. Illinois also permits a separate, timely state QTIP election for qualifying property passing to a spouse; this can defer tax, with elected property included on the survivor's return. It is not an automatic doubled exclusion or a promise that tax disappears. An estate professional should review the actual ownership, beneficiary designations, gifts and deductions. [13]

Creditor protection: your IRA and an inherited IRA differ

735 ILCS 5/12-1006 provides an exemption for qualifying retirement-plan interests, including IRAs, when the plan is intended in good faith to qualify under federal law. The section states no fixed dollar cap. That is not a promise against every creditor or in every proceeding; the account's status and applicable exceptions matter. [15]

In In re Marriage of Branit, 2015 IL App (1st) 141297, the Illinois Appellate Court held that a nonspouse inherited IRA did not qualify for that exemption. The opinion does not identify the account as a Roth IRA. It should not be described as an express ruling about every inherited Roth, every spousal beneficiary or every form of creditor protection. Bankruptcy has separate federal retirement-fund provisions; Illinois's opt-out from the federal exemption list does not erase those provisions. Get account-specific legal advice before relying on an exemption. [15] [16]

Moving: residency and estate exposure need separate checks

Illinois income-tax residency is not domicile alone. It includes a person present in Illinois for other than a temporary or transitory purpose, and a person domiciled in Illinois who is absent only temporarily or transitorily. Facts and circumstances matter; a mailing-address change or a generic day-count rule is not enough to establish the answer. [17]

The retirement subtraction does not establish that moving before or after a conversion has the same total result. Check federal tax, income-tested benefits, other income and the destination state's rules. Moving also does not necessarily eliminate Illinois estate tax: Illinois real or tangible property can leave exposure, and the Attorney General's instructions require an Illinois-assets apportionment after the preliminary estate-tax calculation. [1] [7] [13]

Illinois programs that may intersect with a Roth

My Illinois Savings

Formerly Illinois Secure Choice, My Illinois Savings is a state-facilitated retirement program. The Treasurer says businesses must participate or offer a qualified plan if they had at least five Illinois employees in every quarter of the prior calendar year, have been in business for at least two years and do not currently offer or contribute to a qualified retirement plan. The default is a target-date Roth IRA with a 5% payroll contribution; savers can change contributions or opt out. [18]

Automatic enrollment does not override federal Roth eligibility. Compensation, modified AGI and contributions to all of your Traditional and Roth IRAs still matter. Confirm eligibility and remaining contribution room instead of assuming enrollment guarantees that every payroll contribution is allowed. [2] [4]

529 contributions and qualifying Roth rollovers

Eligible contributions to Illinois's Bright Start, Bright Directions and College Illinois plans can produce an Illinois subtraction of up to $10,000 per year, or $20,000 on a joint return. This is a college-savings subtraction, not extra Roth IRA contribution room. [19]

Illinois recognizes qualifying 529-to-Roth transfers under the law effective August 2, 2024. A transfer satisfying the applicable rules is not an Illinois nonqualified withdrawal merely because it goes to a Roth. Federal account-age, recent-contribution, beneficiary, compensation, annual IRA and lifetime limits still apply; use the plan's rollover process. For a genuinely nonqualified withdrawal, Illinois recapture concerns previously deducted contributions attributable to that withdrawal—not automatically every deduction ever claimed for the account. [20] [19]

Medicaid and other resource-based assistance

Do not use the income-tax subtraction as a Medicaid eligibility rule. In Illinois DHS's resource-based retirement-account guidance, access to funds and whether benefits are being drawn affect income/resource treatment. An accessible account may count as a resource; when benefits are drawn, the manual instead describes budgeting income and exempting principal. This is not a blanket exemption for every Roth or every Medicaid category. AABD and long-term-care eligibility require their own program-specific review. [21]

Public employees: check the specific plan

The State Deferred Compensation Plan, TRS Supplemental Savings Plan and SURS Deferred Compensation Plan offer pre-tax and Roth options, subject to participation and contribution rules. These supplemental savings arrangements are distinct from the underlying pension. Their availability does not prove that every employee or every contribution can use pre-tax treatment. [22] [23] [24] [6]

IMRF's Voluntary Additional Contributions are after-tax contributions with tax-deferred interest, not a Roth account. That statement about VAC does not establish what other retirement plans an employer may offer. [25]

Three questions to check before acting

Contribution: is the alternative actually deductible or pre-tax, and would it reduce tax I otherwise owe?
Conversion: what amount enters federal AGI, and which credits, exemptions or household-income tests use it?
Account and estate: is this my own or an inherited account, and what do ownership, prior gifts, property location and beneficiary arrangements change?

The useful Illinois distinction is between a subtraction for retirement income and the rest of the financial picture. Neither a zero direct state tax on conversion income nor a possible current deduction settles the entire Roth decision.

Sources and downloads

Corrected downloads — October 24, 2026: Illinois source data (CSV) and Illinois contribution and AGI examples (Excel). The source records retain their applicable years and conditions. The workbook illustrates a current deduction effect and a federal-AGI threshold check; it is not a filing calculator or a complete benefit-eligibility determination.

Supersedes the July 28, 2026 files: these corrected downloads replace the earlier CSV and workbook. Older saved copies contain claims affected by this correction and are not current guidance; do not rely on them for decisions. Use this dated replacement and the official sources below.

Reuse with attribution to RothIRAHub and a link to this Illinois guide. Keep the source and date fields with reused data. See the reuse terms; they control permitted reuse. Government materials retain their own terms.

Sources checked October 24, 2026. The linked IRS Publications 590-A/B and Illinois filing instructions are their currently available 2025 editions; 2026 IRA amounts come from IRS Notice 2025-67. The Attorney General lists its linked estate materials for 2023–2026 deaths. Follow the final forms for the tax or assessment year involved. This source check is not individualized tax or legal advice.

Corrections and updates

Correction — 2026-10-24: Corrected the contribution-cost comparison, residency and inherited-account claims, and the timing and conditions of income-tested benefits. Removed misleading cross-state and estate-tax illustrations. The earlier version described Illinois as charging 4.95% for choosing Roth without consistently requiring an available deductible/pre-tax alternative. It also overstated domicile-only residency and inherited-Roth case law, blurred income and assessment years, and omitted important estate and homestead conditions. The October 24, 2026 CSV and workbook supersede the July 28 downloads; older saved copies are not current guidance. Original publication: July 28, 2026.

Federal Roth IRA rules · 529-to-Roth transfers · Inherited Roth IRAs.

The Roth IRA in Illinois