Residency Migration Reference
Moving from Illinois to Maryland: Residency, Taxes, and What to Prove
Illinois's 4.95% (flat) top income tax rate becomes 6.5% (state, tax year 2026, new top bracket); county piggyback tax adds 2.25% to 3.3% on top in Maryland. This move trades a lighter tax environment for a heavier one, so timing income around the transition year matters.
Residency Tests Side by Side
Illinois does not use a simple day-count threshold; it applies a facts-and-circumstances test instead. Maryland's statutory residency test uses a 183-day threshold.
| Factor | Illinois | Maryland |
|---|---|---|
| Statutory Residency Test | Illinois has no statutory residency test of the New York or Minnesota type: no bright-line day count and no permanent place of abode prong. 35 ILCS 5/1501(a)(20)(A) defines a resident as an individual '(i) who is in this State for other than a temporary or transitory purpose during the taxable year; or (ii) who is domiciled in this State but is absent from the State for a temporary or transitory purpose during the taxable year.' Those are the only two routes to Illinois residency for an individual. Cain v. Hamer, 2012 IL App (1st) 112833, shows how far that departure from a day count runs: snowbird retirees who spent 1,666 days in Illinois against 1,700 in Florida across 1996 through 2004, an average well above 183 Illinois days a year, were held not to be Illinois residents. Day counts matter in Illinois as evidence of purpose and as inputs to the administrative presumptions, not as a threshold that decides residency by itself. | Tax-General Article §10-101(k) and COMAR 03.04.02.01B define a statutory resident as an individual not domiciled in Maryland who nonetheless maintains a place of abode in Maryland for more than six months of the taxable year and is physically present in the state for 183 days or more during the year. Both prongs, the six-month abode and the 183-day presence, are required. Comptroller guidance clarifies this is not meant to sweep in every out-of-state owner of Maryland property: a vacation home used only occasionally, or a home used to visit family, does not create statutory residency unless the 183-day presence threshold is independently met. |
| Domicile Test | Illinois follows the traditional common-law domicile standard under 86 Ill. Adm. Code 100.3020: domicile is the place a person intends as their true, fixed, permanent home, and to which they intend to return whenever absent. A person can have only one domicile at a time, and it continues until a new one is established through both physical presence in the new location and demonstrated intent to abandon Illinois as the permanent home. The Department of Revenue looks at where a person votes, holds a driver's license and registers vehicles, banks, keeps professional relationships (doctor, lawyer, accountant), works, houses family, and belongs to clubs or religious institutions; no single factor controls. | Maryland courts define domicile as the place a person has their true, fixed, permanent home, with no present intention of leaving, and to which they intend to return whenever absent (Blount v. Boston, quoting Shenton v. Abbott). Administrative Release No. 37 states the two most important criteria are where the person actually lives and where they are registered to vote, followed by a facts-and-circumstances review of five additional factor categories: the home (ownership, location, size, value of residences), time (how and where the year is spent, retirement or business activity, travel pattern), items near and dear (sentimental possessions, family heirlooms, collections), active business involvement, and family connections (where family lives, where minor children attend school, social and religious ties). Vehicle registration, bank accounts, and safe deposit box location are also considered. |
| Day Count Threshold | No fixed threshold | 183 days |
| Any Part of a Day Rule | Not applicable in the statutory sense, because Illinois has no day-count threshold for an individual to cross. There is no any-part-of-a-day rule to apply. Days still get counted in Illinois practice, both because 86 Ill. Adm. Code 100.3020(f) presumes residency above nine months in the aggregate and presumes continued residency where an individual is present in Illinois more days than in any other state, and because the Department of Revenue's audit division reconstructs presence from credit card, toll, and travel records to test whether time in Illinois was temporary or transitory. | Yes, explicitly. Administrative Release No. 37 defines a 'day' to mean any part of a day, with one exception: a continuous period of 24 hours or less may not be counted as more than one day, which prevents a single overnight stretch spanning midnight from being double-counted as two separate days. |
| Presumptions | 86 Ill. Adm. Code 100.3020(f) supplies four rebuttable presumptions in place of a statutory day test. An individual who spends in the aggregate more than nine months of any taxable year in Illinois is presumed to be a resident. An individual absent from Illinois for one year or more is presumed to be a nonresident. An individual receiving a homestead exemption on Illinois property under 35 ILCS 200/15-175 is presumed to be an Illinois resident. And an Illinois resident in one year is presumed to be a resident the following year 'if he or she is present in Illinois more days than he or she is present in any other state.' The presumptions 'are not conclusive and may be overcome by clear and convincing evidence to the contrary,' with the rule listing acceptable rebuttal evidence including location of spouse and dependents, voter and vehicle registration, driver's license, filing a resident return elsewhere, home ownership or rental agreements, the permanent or temporary nature of work assignments, location of professional licenses, location of medical providers, accountants and attorneys, club memberships and participation, and telephone or other utility usage over a duration of time. | None published as a separate numeric presumption beyond the statutory 6-month-abode-plus-183-day test itself. |
| Safe Harbors | None published | None published |
Leaving Illinois
Illinois is not in the top tier of aggressive exit-audit states the way New York or California are, but the Department of Revenue does examine departing high earners, especially where a large capital gain or business sale occurred near the claimed move date, or where the taxpayer kept an Illinois home, spouse, or business presence after claiming nonresidency. Auditors reconstruct day counts using credit card statements, toll records, airline records, and utility usage, and they cross-check the General Homestead Exemption against a claimed out-of-state domicile.
Trailing Income
Illinois does not have a convenience-of-the-employer rule, so a former resident who telecommutes for an Illinois employer from another state generally is not taxed by Illinois on those wages solely because the employer is based in Illinois; sourcing follows where the work is actually performed. Illinois does tax nonresident income that is Illinois-source, including compensation for services actually performed in Illinois, gain on the sale of Illinois real property, and a departing resident's share of Illinois business income allocated under the state's apportionment rules for the period they were still a resident or doing business in the state.
Part-Year Filing
Form IL-1040 together with Schedule NR, Nonresident and Part-Year Resident Computation of Illinois Tax, is used for the year someone moves into or out of Illinois. Schedule NR allocates income between the Illinois-resident portion of the year and the nonresident portion, and computes an Illinois tax based only on Illinois-source and Illinois-period income.
Enforcement Methods
Common Exit Mistakes
Establishing Maryland Residency
| Action | Agency | Deadline |
|---|---|---|
| Obtain a Maryland driver's license | Maryland Motor Vehicle Administration (MVA) | within 60 days of becoming a resident |
| Title and register any vehicle kept in Maryland | Maryland MVA | within 60 days |
| Register to vote | Maryland State Board of Elections | no later than 21 days before an election |
Declaration of Domicile
Maryland has no formal declaration-of-domicile filing comparable to Florida's county recording process. Domicile is proven through the facts-and-circumstances factors in Administrative Release No. 37, most heavily where the person actually lives and where they are registered to vote, combined with an actual physical move and the establishment of genuine new ties.
Homestead
Maryland's Homestead Tax Credit is not an exemption in the Florida sense; it caps the annual growth of a principal residence's taxable assessment at 10% statewide (lower in some counties), requiring a one-time eligibility application with the State Department of Assessments and Taxation. Because the credit only applies to a principal residence, holding it is meaningful domicile evidence, and continuing to claim it after asserting nonresident status elsewhere is a direct, checkable contradiction.
Voter Registration
Register online, by mail, or in person no later than 21 days before an election; Maryland also offers same-day registration at early voting sites and on Election Day itself. https://voterservices.elections.maryland.gov/OnlineVoterRegistration/
Vehicle Registration Deadline
60 days
New Resident Tax Traps
A new Maryland resident is taxed on worldwide income from the date Maryland domicile begins, and must also account for the mandatory county piggyback tax layered on top of the state rate, which varies by county from 2.25% to 3.3%. Someone moving from a reciprocal jurisdiction (Pennsylvania, Virginia, West Virginia, DC) should update employer withholding once Maryland residency begins, since the wage reciprocity exemption for nonresident commuters no longer applies to a Maryland resident.
What Changes on Tax
Illinois Top Rate
4.95% (flat)
Maryland Top Rate
6.5% (state, tax year 2026, new top bracket); county piggyback tax adds 2.25% to 3.3% on top
Moving from Illinois to Maryland raises the top marginal income tax rate from about 4.95% to about 6.5%, an increase of roughly 1.55 percentage points.
Withholding Reciprocity
Illinois and Maryland do not have a wage-withholding reciprocity agreement with each other, so this move follows ordinary source-state and resident-state filing rules rather than a reciprocity exception.
Community Property Transition
Illinois and Maryland both use common law, equitable-distribution marital property rules, so no community property transition applies to this move.
Beyond Income Tax
Illinois
Capital gains: No preferential rate. Capital gains are taxed as ordinary income at the same 4.95% flat rate as wages.
Estate or inheritance tax: Illinois has an estate tax with a $4 million exemption per estate that is not indexed for inflation and is not portable between spouses. Rates are graduated from roughly 0.8% up to 16% on the amount above the exemption. There is no separate inheritance tax.
Property tax: Illinois has the highest statewide effective property tax rate in the country, around 1.92% of home value, more than double the national median. The General Homestead Exemption reduces the taxable assessed value of an owner-occupied principal residence by up to $10,000 in Cook County, $8,000 in counties bordering Cook, and $6,000 elsewhere.
Sales tax: State base rate is 6.25%, but local home-rule and county taxes push combined rates as high as 11.5% in parts of Cook, Kane, and Warren counties; the effective statewide average is closer to 8.9%.
Maryland
Capital gains: Maryland has no separate capital gains rate. Gains are included in federal adjusted gross income and taxed as ordinary income under the combined state and county rate structure.
Estate or inheritance tax: Maryland is the only state that imposes both a state estate tax and a separate inheritance tax. The 2026 estate tax exemption is roughly $5 million, well below the much higher federal exemption, which creates a real exposure gap for estates between the state and federal thresholds. The inheritance tax applies a flat 10% to property passing to non-exempt beneficiaries; lineal heirs (spouses, children, parents, grandchildren) and, notably, siblings are exempt, which is broader than most inheritance-tax states.
Property tax: Average effective property tax rate is roughly 1.0% to 1.1%, close to the national average. The Homestead Tax Credit caps the annual growth in a principal residence's taxable assessment at 10% statewide, though individual counties can set a lower cap (Anne Arundel County caps at 2%), and requires a one-time eligibility application with the State Department of Assessments and Taxation.
Sales tax: State sales tax rate is a flat 6% with no local add-ons, so 6% is also the combined rate statewide.
Who This Move Applies To
Travel Nurses
In Illinois
Illinois has no statutory day-count test to trip, so a travel nurse not domiciled in Illinois does not become an Illinois resident merely by crossing a day threshold on a long assignment. What creates exposure instead is the temporary or transitory question and the 100.3020(f) presumptions: an assignment structured as a series of renewals that keeps a nurse in Illinois more than nine months of a year, or more days than in any other state, supports a presumption of residency that must be rebutted by clear and convincing evidence, and the permanent or temporary nature of the work assignment is named in the rule as relevant evidence. The more common Illinois exposure is the reverse pattern, where a nurse claims a Florida or Texas tax home but actually lives in and pays Illinois-area rent for most of the year; Illinois-source wages for days actually worked in Illinois are taxable to any nonresident nurse regardless of claimed tax home.
In Maryland
Maryland applies the same statutory-resident and domicile tests to travel nurses as to anyone else: a nurse not domiciled in Maryland who maintains a Maryland abode for more than six months and is physically present 183 days or more becomes a statutory resident on worldwide income. The nationally common pattern, a nurse claiming a no-tax-state tax home while actually living in a Maryland rental during assignments, is analyzed under this same framework, with the any-part-of-a-day rule making day counts especially unforgiving.
Professional Athletes
In Illinois
Illinois taxes nonresident professional athletes on a duty-day basis: Illinois-source income equals total compensation multiplied by the ratio of duty days in Illinois (games, practices, mandatory team functions) to total duty days for the season; mere travel through Illinois without a game or team event does not create a duty day. This applies to visiting teams playing the Bears, Bulls, Blackhawks, White Sox, and Cubs, and Illinois is regarded by practitioners as an aggressive, well-enforced jock-tax state that historically extended the tax reciprocally to any state that taxed Illinois-based athletes.
In Maryland
Maryland is home to the Baltimore Ravens and Baltimore Orioles, and applies standard nonresident sourcing rules to visiting professional athletes' Maryland-source income for games and duty days performed in the state, filed on the nonresident return (Form 505). Maryland's Comptroller v. Wynne litigation, while about the county tax credit rather than athlete-specific rules, illustrates how seriously Maryland's income-sourcing and credit structure gets litigated at the highest level.
Snowbirds, Long Visitors, and RVers
In Illinois
The Illinois snowbird risk runs entirely through the 100.3020(f) presumptions, not through a day threshold. A retiree who keeps the Illinois house and spends more than nine months there risks the nine-month presumption of residency, and a former Illinois resident is presumed to still be one in the following year if present in Illinois more days than in any other state, which is a comparison a snowbird splitting a year can lose well short of any traditional threshold. The favorable counterweight is Cain v. Hamer, 2012 IL App (1st) 112833, where retirees who split time nearly evenly (1,666 Illinois days against 1,700 Florida days across 1996 through 2004) were held nonresidents, with the court weighing nexus evidence such as Florida licenses, voter registration, a Florida declaration of domicile, club spending, and credit card data showing 73% of expenditures and 61% of transactions outside Illinois. Illinois's General Homestead Exemption is a specific cross-check point if a person claims Florida domicile but keeps the Illinois exemption active.
In Maryland
Maryland's statutory residency test is squarely built for the snowbird scenario: a person who maintains a Maryland home for more than six months of the year and is physically present 183 days or more, counting any part of a day, becomes a statutory resident regardless of domicile elsewhere. Comptroller guidance is explicit that an occasionally used vacation home or a home kept just to visit family does not by itself create residency unless the 183-day presence threshold is independently crossed, which gives genuine long-visit snowbirds a real, if narrow, path to nonresident status.
Remote Workers
In Illinois
Illinois has no convenience-of-the-employer rule. A nonresident who works remotely from another state for an Illinois-based employer is generally not taxed by Illinois on those wages, because Illinois sources employee compensation to where the services are physically performed, not to the employer's location. This makes Illinois meaningfully less sticky for remote workers than New York or a handful of other convenience-rule states.
In Maryland
Maryland has no published convenience-of-the-employer rule. A nonresident who works remotely for a Maryland-based employer while physically located and domiciled outside Maryland is generally not taxed by Maryland on that income, since wages are sourced to where work is actually performed. Maryland residents who work temporarily in another state, per Administrative Release No. 37's own example, remain fully taxable by Maryland with a credit for tax paid elsewhere, since temporary work assignments do not change domicile.
Military
In Illinois
Illinois follows the federal Servicemembers Civil Relief Act and Military Spouses Residency Relief Act. A servicemember whose home of record is Illinois remains an Illinois domiciliary for tax purposes regardless of duty station unless they take affirmative steps to change domicile, while a servicemember stationed in Illinois on orders, and their qualifying spouse, does not become an Illinois resident solely because of the posting, and military pay is not Illinois-source income for a nonresident servicemember stationed there.
In Maryland
Maryland follows the Servicemembers Civil Relief Act: a servicemember whose domicile was Maryland when they entered service continues to be a Maryland resident regardless of where they are stationed, unless they follow established military procedures to change their legal residence to another state. Administrative Release No. 37's published FAQ addresses this directly, confirming that being posted outside Maryland does not by itself change the filing requirement.
Airline Crew
In Illinois
Federal law (49 U.S.C. §40116) limits states to taxing airline employee compensation only in the employee's state of residence and any state where more than 50% of pay is earned. This protects flight crew based at O'Hare or Midway who are domiciled outside Illinois from having their full compensation pulled into Illinois taxation solely because their duty station is in Illinois.
In Maryland
Federal law (49 U.S.C. §40116) limits states to taxing an air carrier employee's compensation only in the state of residence and any state where more than 50% of pay is earned, protecting flight crew connected to Maryland operations, including those working through BWI Marshall Airport, from having their full income pulled into Maryland taxation solely because of duty station if they are domiciled elsewhere.
Tools for This Move
Illinois to Maryland FAQ
Does Illinois have a 183-day rule like New York or Minnesota?+
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.
I didn't spend a single day in Maryland last year, didn't use any state services, and paid taxes elsewhere. Why do I still owe Maryland tax?+
This is close to a verbatim question the Comptroller's own published guidance addresses directly: unless you intended to sever ties with Maryland and establish a new domicile elsewhere, and that intent is shown by actually establishing the new domicile, you're still considered a Maryland resident and owe Maryland tax, regardless of how little you used the state during the year. Zero days present doesn't matter if your domicile never legally changed.
If I move to Florida but keep my Chicago condo, will Illinois still tax me?+
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.
My job sent me away for three years and I wasn't sure if I was coming back. Am I still a Maryland resident?+
Yes, according to Maryland's own published guidance. A job assignment, even a multi-year one with genuine uncertainty about returning, does not by itself change your domicile. Temporary absences from Maryland, for business, health, or pleasure, don't constitute a change of domicile under the standard Maryland courts apply; you would need to affirmatively establish a new domicile elsewhere with real ties, not just leave.
Does Illinois have a convenience-of-the-employer rule for remote workers?+
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.
How does the any-part-of-a-day rule actually work in Maryland?+
Maryland defines a day as any part of a day for purposes of the 183-day statutory residency threshold, so a few hours in the state on a given date generally counts as a full day. The one carve-out: a single continuous 24-hour period spanning midnight cannot be counted as more than one day, which prevents double-counting an overnight stretch. Combined with the requirement of a Maryland abode maintained more than six months, this makes Maryland's day count especially unforgiving for anyone splitting time between homes.
How do I file my Illinois taxes for the year I move out of state?+
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.
I keep a vacation home in Maryland but only visit occasionally. Does that make me a resident?+
Not automatically. The Comptroller's guidance specifically addresses this: a residence used as a vacation home, or kept just to visit family and friends, does not by itself make you a Maryland resident. You'd still need to be physically present in Maryland for 183 days or more during the year for the statutory residency test to apply, so occasional visits to a lightly used vacation property generally stay under the threshold.
I work in Illinois but live in Wisconsin. Do I have to file two state returns?+
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.
My family stayed in Maryland while I worked temporarily in another state. Am I still taxed as a Maryland resident?+
Yes. Maryland's own published example addresses this exact situation: a resident who takes up temporary residence in another state for a job while their spouse and children remain in Maryland does not lose Maryland domicile, and the fact that family stayed behind reinforces that Maryland remains the permanent home. You would owe Maryland tax on that income, though you can generally claim a credit for tax paid to the state where you worked.
Will keeping the homestead exemption on my Illinois house hurt me if I claim Florida residency?+
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.
I moved overseas for work on a J-1 visa. Why does Maryland still tax me?+
Because a visa that legally requires you to leave the host country once your assignment ends prevents you from establishing a genuine new domicile there, according to Maryland's published guidance. A short-term, renewable work contract under a restrictive visa is treated as a temporary residence, not a domicile change, so you remain a Maryland resident and taxpayer for the duration, regardless of how long the overseas posting lasts.
Considering the reverse move?
Maryland to Illinois
Moving the other direction is a different fact pattern, not a mirror image: exit risk and establishment mechanics both flip.
View the Maryland to Illinois guideAlso Consider, Leaving Illinois
Illinois to Maryland Reading
Reviewed Against 26 Primary Sources
ResidencyIQ organizes public residency research into a reviewable reference. It does not provide legal or tax advice. Consult a qualified professional before making a residency decision.
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