Illinois 1099 tax calculator
Estimate what you owe on self-employment income in Illinois: 15.3% self-employment tax, 2026 federal income tax, the QBI deduction and Illinois's 4.95% state income tax. The state rate below is pre-filled — adjust it if your bracket differs.
Your numbers
What you'll owe
Estimated total tax
$14,710
≈ 24.5% of profit · set aside 25% of every deposit
Each quarterly payment
$3,677
Due ~Apr 15, Jun 15, Sep 15, Jan 15
- Net business profit
- $60,000
- Self-employment tax (15.3%)
- $8,478
- QBI deduction
- − $11,152
- Taxable income
- $29,209
- Federal income tax
- $3,262
- Illinois tax (estimate)
- $2,970
Don't miss your next IRS payment
Email me Set aside 25% — about $3,677 each quarter and one reminder a week before it's due. No account, no spam.
Illinois self-employed tax at a glance
| State income tax | 4.95% flat |
|---|---|
| Self-employment tax | 15.3% federal (12.4% Social Security + 2.9% Medicare) |
| Social Security wage base | $184,500 (2026) |
| Local income tax | No broad local income tax on business profit |
| Quarterly estimate dates | Federal and state: Apr 15, Jun 15, Sep 15, Jan 15 |
| Typical total rate on $100k profit | About 26.9% (~$26,865) |
What Illinois tax looks like at four profit levels
Single filer, standard deduction, 20% QBI deduction applied, Illinois rate of 4.95% included. Your own number depends on filing status and deductions — use the calculator above for that.
| Net profit | Self-employment tax | Federal income tax | Illinois tax | Total | Set aside monthly |
|---|---|---|---|---|---|
| $50,000 | $7,065 | $2,370 | $2,475 | $11,910 (23.8%) | $992 |
| $75,000 | $10,597 | $4,600 | $3,713 | $18,910 (25.2%) | $1,576 |
| $100,000 | $14,130 | $7,786 | $4,950 | $26,865 (26.9%) | $2,239 |
| $150,000 | $21,194 | $15,964 | $7,425 | $44,583 (29.7%) | $3,715 |
Self-employment tax in Illinois
Illinois applies a 4.95% flat rate; sole proprietors may also owe replacement tax if organized as an entity.
Federal rules are the same everywhere: you pay 15.3% self-employment tax on 92.35% of net profit, then income tax on profit less half of that SE tax, the standard deduction and up to 20% qualified business income. What changes state to state is the layer on top — which is why the reserve percentage a Illinois contractor needs is higher than in the nine no-income-tax states.
The failure mode isn't the arithmetic, it's cash. Money lands, it gets spent, and the quarterly due date becomes a crisis. Hate Ledger moves the reserve out of reach the day each deposit clears, so the bill is funded before you see it.
Frequently asked questions
How much tax do 1099 contractors pay in Illinois?
Illinois applies a flat 4.95% individual income tax to your net profit, on top of federal income tax and 15.3% self-employment tax.
How much should I set aside for taxes in Illinois?
A common reserve in Illinois is 30-35% of net profit once the 4.95% state rate is layered onto federal income and self-employment tax. Use the calculator above with your own numbers.
Do I owe quarterly estimated taxes in Illinois?
Yes — federal estimates are due if you expect to owe $1,000 or more, and Illinois runs a parallel state estimated payment schedule on roughly the same April, June, September and January dates.
Are there local taxes on self-employment income in Illinois?
Illinois does not layer a broad local income tax on self-employment earnings, so state and federal are the two numbers to plan for.
Estimates only, using projected 2026 federal figures and published Illinois rates. Not tax advice.
More Illinois calculators
Same state figures, different question. All free, no account needed.
Run the same numbers for another state
State income tax is the biggest variable in the result. Pick your state for a pre-filled estimate.