Illinois RSU Vesting Tax Calculator
An Illinois vest of 100 shares at $50, after $100,000 in wages, produces $1,730 in estimated withholding and 65 shares retained. The editable state input is 4.95%.
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Pre-filled: State DOR (regular method — estimate)
Net Value After Tax
Estimated • Based on your inputs
Total Tax Withheld
$1,730.00
Detailed Breakdown
Disclaimer: This calculator provides estimates for informational purposes only. Results should not be considered financial, tax, or legal advice. Consult a qualified professional for your specific situation.
How This Calculator Works
Calculation methodology and assumptions
Illinois's withholding formula accounts for employee allowances and pay periods. A percentage applied to the vest alone cannot reproduce those inputs. Use the rate field to test an amount informed by your employer's calculation.
Key State Information
At 200 shares worth $100 each and $190,000 in prior wages, the engine estimates $990 for the state and $5,770 overall. Its sell-to-cover calculation leaves 142 whole shares. The payroll formula begins with wages, subtracts the value of the employee’s allowances for the pay period, and then applies its rate. By contrast, this estimate applies the entered percentage to the full vest value. If you have allowances or request additional withholding, compare the state line with payroll rather than assuming the prefill captures your certificate.
StateCalc Team
Editorial Team
The StateCalc team builds financial calculators using data from official government sources including the IRS, U.S. Census Bureau, BLS, and state revenue departments. All formulas are validated by an automated test suite and cross-referenced against published data.
Our editorial standardsFrequently Asked Questions
Does the state percentage account for my IL-W-4?
No. The Illinois formula uses allowances and the number of pay periods; this calculator does not collect those details.
Can the shares retained differ from my brokerage statement?
Yes. The model rounds the shares sold up to a whole share and uses the entered vest price; payroll and brokerage practices can differ.
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