🇺🇸 Illinois Self-Employment & Income Tax • FLAT
Illinois 1099 Tax Calculator
Accurately calculate net freelance earnings, 15.3% SECA self-employment tax, federal income tax, and Illinois state tax brackets with quarterly payment schedules.
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Net Schedule C$85,000
Self-Employment (SECA)-$12,010
Income Taxes (Fed+State)-$9,174
Net Take-Home$63,816
IRS Quarterly Estimated Tax Payment Deadlines (Form 1040-ES)
Avoid IRS underpayment penalties with scheduled quarterly payments
Q1 (Jan 1 – Mar 31)Due Date: April 15, 2026
$5,295.97
Q2 (Apr 1 – May 31)Due Date: June 15, 2026
$5,295.97
Q3 (Jun 1 – Aug 31)Due Date: September 15, 2026
$5,295.97
Q4 (Sep 1 – Dec 31)Due Date: January 15, 2027
$5,295.97
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1099 Freelancer vs. W-2 Employee Take-Home Comparison
As a 1099 contractor, you pay approximately $595 more in FICA self-employment taxes than a W-2 employee with identical gross earnings because you cover both the employer and employee shares.
1099 & Freelance DeductionsKeeper / TurboTax Self-Employed
Maximize Schedule C Tax Write-Offs
Find every allowable business expense, mileage deduction, and home office write-off to slash your tax bill.
✓ Automatic Expense Scanning✓ Direct IRS E-Filing✓ Certified CPA Review Included
Annual 1099 Net Profit
$63,816
Effective Total Tax:24.92%
Self-Employment (SECA):14.13%
Federal Income Tax:6.35%
State (IL) Tax:4.44%
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🏛️ Illinois Individual Tax Structure
State Tax Type: FLAT system.
Standard Deduction: $2,775 (Single) / $5,550 (Married Joint).