GuardrailComplexity score 3 / 10

Illinois Remote-Work Tax Nexus Complexity

Guardrail complexity~30-day nonresident thresholdReciprocity with IA, KY, MI, WI
State
Illinois (IL)
Complexity tier
Guardrail
Complexity score
3 / 10
Nexus posture
modern
Guidance complexity
moderate
Withholding threshold
30-day de-minimis
Convenience-of-employer rule
No
Local income tax
No
Reciprocity
IA, KY, MI, WI

Illinois has specific regulations governing the taxation of wages for both resident and nonresident remote employees:

  • Employer Withholding Obligations: Employers are required to withhold taxes from the wages of employees, including nonresidents, for compensation paid in Illinois. This is outlined in Section 701, which states that every employer maintaining an office in Illinois must deduct and withhold taxes from employee compensation exceeding a calculated exemption.

  • Sourcing of Nonresident Wages: Nonresidents' wages are sourced based on where the work is performed. Under Section 302, all compensation paid to nonresidents for services rendered in Illinois is classified as income subject to Illinois taxation. For nonresidents engaged in tax years beginning on or after January 1, 2020, employers must track the number of days employees work in Illinois through a time and attendance system or obtain a certification from employees regarding their expected workdays in the state (as per Section 701(a-5)).

  • Reciprocity Agreements: Illinois has reciprocity agreements with several states (Iowa, Kentucky, Michigan, and Wisconsin) that allow residents of those states to be exempt from Illinois withholding on compensation earned within the state. This means if a resident from one of these states works in Illinois, their wages would not be subject to Illinois tax withholding, and similar exemptions apply to Illinois residents working in those states (Section 701(d)).

  • De-minimis Threshold: There is a 30-day de-minimis threshold for nonresident workers in Illinois. This means that if a nonresident employee works less than 30 days in Illinois, their wages may not be taxed by the state (as mentioned in CURATED FACTS).

  • Local/City Wage Taxes: There are no local or city wage taxes imposed on wages within Illinois, including those for remote employees, which simplifies tax obligations for both employers and employees.

These regulations create a structured system for taxing wages of remote employees in Illinois, ensuring compliance while allowing for certain exemptions and rules regarding withholding obligations.

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As of June 28, 2026 · live

Informational only — not tax or legal advice. These state complexity ratings are derived from a structured framework and may be draft pending expert review; remote-work tax rules change frequently. Confirm specifics for your situation with a qualified tax professional.

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