Illinois Pay Stub Checker (Free, 2026)

Frequently asked questions

Does Illinois have a state income tax?

Yes. Illinois levies a flat state income tax of about 4.95% on wages. Verify the current rate with the Illinois Department of Revenue.

What should I check on a Illinois pay stub?

Compare gross pay to your rate and hours, check federal income tax withholding against your W-4, confirm Social Security (6.2% up to the 2026 wage base of $184,500) and Medicare (1.45%), review the Illinois state income tax line, and confirm pre-tax and post-tax deductions before net pay.

Is uploading a pay stub safe?

Before sharing any pay stub, cover or remove personal identifiers: Social Security number, bank account details, home address, employee ID, employer reference numbers, QR codes, and barcodes. PayslipIQ is an educational tool and cannot confirm whether your paycheck is correct.

Illinois Pay Stub Checker

Read a Illinois pay stub line by line — gross pay, federal tax, FICA, Illinois state tax, deductions, and net pay — in plain English.

In short

A Illinois pay stub shows the same federal lines as any US stub — federal income tax, Social Security, and Medicare — plus state-specific lines. Illinois applies a flat state income tax of about 4.95% to wages, so the state income tax line is relatively predictable. PayslipIQ explains each line so you can spot what to verify. Educational only.

PayslipIQ provides educational information and estimated calculations only. It does not provide tax, legal, financial, accounting, employment, benefits, or payroll advice. PayslipIQ is not a CPA firm, law firm, financial advisor, payroll provider, or tax authority. Always verify your paycheck, deductions, withholdings, and tax position with your employer's payroll department, a qualified CPA, the IRS, your state tax authority, or another appropriately qualified professional. Calculations are estimates; your actual paycheck may differ based on factors specific to your employer, location, benefits elections, and personal tax situation.

What is on a Illinois pay stub

Gross pay. Total earnings for the pay period before any deductions — rate times hours, or salary divided by pay periods, plus overtime and any bonuses.

Federal income tax. Withheld from every US paycheck using your W-4 and the IRS Publication 15-T method. This is the same in Illinois as in every other state.

FICA — Social Security and Medicare. Social Security is 6.2% of wages up to the 2026 wage base of $184,500; Medicare is 1.45% of all wages, with an extra 0.9% Additional Medicare Tax on wages above $200,000 for a single filer.

State income tax. Illinois applies a flat state income tax of about 4.95% to wages, so the state income tax line is relatively predictable.

Pre-tax and post-tax deductions. Pre-tax items (traditional 401(k), HSA, Section 125 health premiums) reduce taxable wages. Post-tax items (Roth contributions, garnishments) come off after tax.

Net pay. Take-home pay — gross minus every tax and deduction above.

Estimate a Illinois paycheck

To estimate take-home pay from gross, use the Illinois paycheck calculator, which pre-selects Illinois state settings. To walk through a real stub line by line, use the PayslipIQ Pay Stub Checker.

Official Illinois source

For current Illinois withholding rules and rates, see the Illinois Department of Revenue. PayslipIQ is independent and not affiliated with any state agency.

Frequently asked

Does Illinois have a state income tax?: Yes. Illinois levies a flat state income tax of about 4.95% on wages. Verify the current rate with the Illinois Department of Revenue.
What should I check on a Illinois pay stub?: Compare gross pay to your rate and hours, check federal income tax withholding against your W-4, confirm Social Security (6.2% up to the 2026 wage base of $184,500) and Medicare (1.45%), review the Illinois state income tax line, and confirm pre-tax and post-tax deductions before net pay.
Is uploading a pay stub safe?: Before sharing any pay stub, cover or remove personal identifiers: Social Security number, bank account details, home address, employee ID, employer reference numbers, QR codes, and barcodes. PayslipIQ is an educational tool and cannot confirm whether your paycheck is correct.