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Illinois 1099 tax calculator

Illinois freelancers pay the state's flat 4.95% income tax on their net business income, plus the federal 15.3% self-employment tax, plus federal income tax. Illinois offers a per-person exemption (~$2,775) that slightly reduces the bite for lower-income freelancers but doesn't fundamentally change the math.

Your 1099 income

Updates instantly as you type.

Total payments received from clients

$

Deductible expenses (home office, software, mileage, etc)

$

If you also have a regular job — affects your federal bracket

$

Total tax owed

Self-employed

$17,470

Pay $4,367 quarterly to the IRS — that's an effective rate of 24.3% on your net profit.

Tax breakdown

  • Net profit (income − expenses)
    $72,000
  • Self-employment tax (15.3%)
    $10,173
  • Federal income tax
    $4,122
  • Illinois state tax
    $3,175
  • QBI deduction (20% reduces fed tax)
    −$14,400
  • Half-SE tax deduction
    −$5,087
  • After-tax take-home
    $54,530

Q1

Apr 15

$4,367

Q2

Jun 16

$4,367

Q3

Sep 15

$4,367

Q4

Jan 15

$4,367

AI Analysis

Illinois freelancer tax landscape

Illinois treats 1099 income identically to W-2 wages at the state level — the same flat 4.95% applies. Unlike progressive-bracket states, your state rate doesn't change as your freelance income grows. A freelancer earning $50,000 net pays 4.95%; one earning $250,000 pays 4.95%.

Illinois allows a $2,775 per-person exemption (filer + each dependent), subtracted before applying the 4.95% rate. For a married freelancer with two kids, that's roughly $11,100 of income exempt from state tax — a $549 savings.

Illinois does not allow the federal QBI deduction at the state level. The half-SE tax deduction is also federal-only. So state tax is computed on a more straightforward net-business-income basis (after the personal exemption).

Illinois requires quarterly estimated payments via Form IL-1040-ES if you expect to owe more than $500 in state tax. Due dates align with federal: April 15, June 16, September 15, January 15. Chicago and most other IL cities do not impose local income taxes — Illinois law generally prohibits municipal income tax.

Compare Illinois to other states

See how 1099 taxes in Illinois compare to other major states:

Frequently asked questions

What's the Illinois 1099 tax rate?

A flat 4.95% on net business income, after the per-person exemption ($2,775 per filer + dependent).

Does Chicago have a city income tax for freelancers?

No. Chicago does not impose a city income tax. Illinois law does not permit municipal income taxes — most IL cities fund themselves through property tax, sales tax, and fees.

What's Illinois's QBI policy for freelancers?

Illinois does not allow the federal QBI deduction at the state level. Your federal QBI deduction reduces federal tax but does not reduce IL state tax.

Do I file quarterly taxes in Illinois?

Yes — Form IL-1040-ES, due April 15, June 16, September 15, and January 15 each year if you expect to owe more than $500 in IL state tax.

Does Illinois require sales tax on freelance services?

Most professional services are exempt from Illinois sales tax. Specific services (some repair work, certain digital products) are taxable. SaaS taxability varies — check with the Illinois Department of Revenue.

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