Illinois paycheck calculator

The same calculator, pre-set to Illinois. State figures below are computed from Illinois's own published withholding method — cited at the bottom of this page.

Your pay

Gross pay per check Pay entered as Pay frequency Year-to-date wages before this check (for the Social Security cap)

Federal — your W-4

Filing status (Step 1c) Step 2 box is checked (multiple jobs / spouse works — use the higher withholding schedules) Step 3 — dependents amount ($)

More W-4 detail (Steps 4a–4c)

Step 4(a) — other income, annual ($) Step 4(b) — deductions above the standard amount, annual ($) Step 4(c) — extra withholding per check ($)

Deductions per check

Pre-tax retirement — 401(k)/403(b)/457 ($) Pre-tax premiums & HSA — cafeteria plan ($) Post-tax deductions ($)

State

Work state

State inputs mirror that state's own withholding form.

Your pay stub Annual figures

No signup. Nothing you type is stored or sent anywhere — every figure is computed on this device, from the published withholding methods cited below.

Worked example

Worked example. The IL-700-T automated-method example: $800 a week, 2 allowances on Line 1 and 2 on Line 2.
Federal income tax $54.08 · Social Security $49.60 · Medicare $11.60 · Illinois withholding $32.13 · Take-home $652.59 per week

How Illinois withholding works

State form: IL-W-4.

Illinois withholds at a flat 4.95% of pay after exemptions: $2,925 per Line 1 allowance and $1,000 per Line 2 additional allowance, prorated to the pay period, plus any extra amount on Line 3. Illinois has no standard deduction in withholding.

Current parameters

flat rate pct	4.95
formula	Tax withheld = 0.0495 x (Wages per period - ((Line 1 allowances x $2,925) + (Line 2 allowances x $1,000)) / number of pay periods in a year), plus any additional amount requested on Form IL-W-4 Line 3
line1 allowance annual	2,925
line2 allowance annual	1,000
methods published	wage-bracket tables by pay period (daily, weekly, biweekly, semimonthly, monthly, annual), automated payroll (percentage) method using the formula above
no form rule	Employee who does not file a completed Form IL-W-4 is withheld with no exemptions (per IL-W-4 instructions referenced in IL-700-T)
standard deduction in withholding	None

What this page covers — and what it doesn't

State method only; Illinois has no local income taxes.

Source. 2026 Booklet IL-700-T - Illinois Withholding Tax Tables (R-12/25), effective January 1, 2026 — Illinois Department of Revenue — tax year 2026. Tables checked 2026-11-06. Official source.