Indiana paycheck calculator

The official method, step by step

• Pay is annualized, then reduced by the Form W-4 amount for your filing status ($8,600, or $12,900 if married filing jointly) unless the Step 2 box is checked.
• Federal income tax comes from the IRS 2026 Annual Percentage Method table for that status, divided back to one paycheck.
• Social security is 6.2% of wages until the year's wages reach $184,500.
• Medicare is 1.45% of all wages, plus 0.9% on wages over $200,000 in the year.
• A pre-tax 401(k) lowers federal income tax wages, not social security or Medicare wages.
• Indiana income tax follows Departmental Notice #1: $1,000 a year for each WH-4 exemption and $1,500 for each dependent (divided over the pay periods) come off the pay, then 2.95% state tax and the county rate apply to the rest.
• County tax uses the county the employee lived in on 1 January, or where they worked if they lived out of state, at the rates effective 1 October 2026. Boone County's rate changed on that date, so earlier Boone pay stubs need the figure from your payroll.

What this leaves out

• WH-4 first-time dependents and adopted children (the pay stub generator handles them)
• Benefits, garnishments and other after-tax deductions
• W-4 Step 3 credits and Step 4 entries (the pay stub generator handles them)

Sources: Indiana Department of Revenue, Departmental Notice #1 (R47 / 10-26): 2.95% state rate; $1,000 per WH-4 exemption, $1,500 per additional and first-time dependent, $3,000 per adopted child; county tax rates effective Oct. 1, 2026; IRS Publication 15-T (2026), Federal Income Tax Withholding Methods: Worksheet 1A and the Annual Percentage Method Tables; IRS Publication 15 (2026), (Circular E) Employer's Tax Guide: social security and Medicare tax, Additional Medicare Tax.