Illinois Residency

No. This is the single most common misconception about Illinois residency. 35 ILCS 5/1501(a)(20) contains no day-count threshold and no permanent place of abode prong; a resident is someone in Illinois for other than a temporary or transitory purpose, or an Illinois domiciliary absent for a temporary or transitory purpose. What Illinois has instead are the rebuttable presumptions in 86 Ill. Adm. Code 100.3020(f), including a presumption of residency above nine months in the aggregate and a presumption that a prior-year resident remains one if present in Illinois more days than in any other state. The practical difference is real in both directions: crossing 183 Illinois days does not by itself make you a resident, and staying under 183 does not by itself make you a nonresident.

Keeping the condo does not by itself make you taxable, because Illinois has no permanent place of abode test that a retained condo could trigger. The risk runs through purpose and presumptions instead. If you spend more than nine months of the year in Illinois, or simply more days there than in any other state after a year as an Illinois resident, the Department gets a presumption of residency you can rebut only by clear and convincing evidence. Continuing to claim the General Homestead Exemption on the condo is worse than the condo itself, since that alone creates its own presumption of Illinois residency and is a cross-check Illinois auditors run directly against a claimed out-of-state domicile.

No. Illinois sources employee wages to where the work is physically performed, not to where the employer is headquartered. A nonresident who works remotely from another state for a Chicago-based employer generally is not taxed by Illinois on those wages, which is a meaningful difference from convenience-rule states like New York, and it means remote workers face less Illinois exposure after moving away than they might expect.

File Form IL-1040 together with Schedule NR, the Nonresident and Part-Year Resident Computation of Illinois Tax. Schedule NR splits your income between the period you were an Illinois resident, which is taxed in full, and the period after you became a nonresident, when only Illinois-source income is taxed. Skipping Schedule NR and simply filing as a full-year nonresident in your move year is a common and easily flagged mistake.

Illinois has reciprocity with Wisconsin, Iowa, Kentucky, and Michigan, so a Wisconsin resident working in Illinois generally does not owe Illinois tax on those wages and should not have Illinois tax withheld; instead, only Wisconsin taxes that income. If Illinois tax was withheld in error, you file for a refund from Illinois rather than claiming a credit, and you report the income on your Wisconsin return as usual.

Yes, it's a direct contradiction auditors specifically look for. The General Homestead Exemption requires the property to be your owner-occupied principal residence as of January 1, so continuing to receive it while filing as an Illinois nonresident and claiming Florida domicile undercuts your own position. If you've genuinely moved, removing the exemption is one of the concrete steps that supports your new domicile claim.

No. Illinois fully exempts qualified retirement income from state tax, including Social Security, pension payments, and qualifying distributions from 401(k)s, 403(b)s, 457(b)s, and IRAs, with no age requirement and no income cap. This is one of the more retirement-friendly features of Illinois tax law and is a genuine reason some retirees stay rather than chase a no-income-tax state.

Illinois uses a duty-day formula: the player's total season compensation is multiplied by the ratio of Illinois duty days, which include games, practices, and mandatory team functions, to total duty days for the season. A single game in Chicago against the Bulls, Bears, or another Illinois team creates Illinois-source income taxable on a nonresident basis, and Illinois is considered one of the more aggressively enforced jock-tax states.

They matter as evidence and as presumption inputs, not as a threshold. Because Illinois sets no statutory day limit, there is no line where one more day flips your status, and no any-part-of-a-day rule attached to such a line. Days still decide two things that count: whether you exceeded nine months in Illinois in the aggregate, and whether Illinois was simply your highest-day state. Cain v. Hamer is the reminder that the comparison is what matters, since retirees averaging more than 183 Illinois days a year were still held nonresidents on the strength of their Florida connections. Illinois auditors reconstruct presence from credit card, toll, and travel records to test the purpose of your time, so the count is worth keeping accurately even without a threshold to clear.

No, Illinois does not have a separate exit tax. What it does have is ordinary income tax on Illinois-source income earned up to and after your departure, computed on Schedule NR for the year you leave, plus continued taxation of any Illinois-source income, like gain on Illinois real estate or income from an Illinois business, that arises after you've become a nonresident. The estate tax, with its unindexed $4 million exemption, is a separate and increasingly relevant consideration for wealthier residents regardless of whether they leave.

A servicemember posted to Illinois on military orders, and their spouse under the Military Spouses Residency Relief Act, does not become an Illinois resident solely because of the duty station, and the servicemember's military pay is not treated as Illinois-source income for a nonresident. Someone whose home of record was Illinois before enlisting remains an Illinois domiciliary unless they take affirmative steps, like establishing a new domicile in another state, to change it.