Indiana payroll taxes operate on two layers — and most first-time employers only set up one. Every Indiana employee owes a 3.05% flat state income tax in 2026, plus a county income tax based on where they live. Miss the second layer and you're under-withholding from day one: a headache for your employees at tax time, a penalty notice for you.
The two-tier system is manageable once you understand it. Know where to look up the numbers, register in the right places, and file on schedule. That's the whole job.
- Indiana = state rate (3.05%) + county rate. Both come out of every paycheck.
- Register with IDOR (withholding) and Indiana DWD (unemployment) before your first payroll.
- County tax is based on where your employee lives — not where they work.
- Most small employers file quarterly; IDOR charges 10% penalty for late filings.
Indiana's Two-Layer Withholding System
Indiana is one of the few states with a statewide county income tax — which means there's no opting out of the second layer. All 92 counties impose their own income tax, ranging from 0.5% to 2.9%, and every single one has a rate currently in effect. Your obligation as an employer is to withhold both: state first, county on top.
The state rate has been falling by statute. Indiana law mandates annual reductions: 3.15% in 2025, 3.05% in 2026, with another drop scheduled for 2027. More money in your employees' pockets — but your payroll setup must reflect the current figure, not last year's.
Consider a plumbing company owner in the Indianapolis suburbs — a situation we see regularly. Federal payroll? Set up correctly. Indiana withholding? Registered. County tax for Hamilton County employees? Never entered. Result: every employee under-withheld by 1.1% all year. An easy fix once caught, but entirely preventable.
Indiana = state rate + county rate. Both come out of every paycheck, every time. There's no threshold or minimum that lets you skip the county layer.
Three Things You Must Register for Before Your First Payroll
Indiana requires three separate registrations. Each is straightforward — provided you know exactly where to go.
Register at intime.dor.in.gov (the INTime portal) before your first payroll runs. INTime handles both registration and all future filing and payment — one portal, one login, end to end.
Register at uplink.in.gov. The new employer SUTA rate is 2.5% on the first $9,500 of each employee's wages, per Indiana's Department of Workforce Development.
Report every new employee within 20 days of hire at the Indiana New Hire Reporting Center (indiananewhi.re). Federal law requires it. Indiana enforces it.
How to Find the Right County Tax Rate (Without Getting Lost)
This is where most employers trip up. The process has exactly three steps.
Step 1: Get the employee's county of residence. Indiana uses its own withholding form — the WH-4 — rather than the federal W-4 for state and county purposes. Hand it to every new hire on day one. It captures their county of residence, which is the number that drives their county rate.
Step 2: Look up the rate on IDOR's published table. Go to in.gov/dor and search "county tax rates." IDOR publishes an updated table each January covering all 92 counties. Rates run 0.5% to 2.9% as of 2026.
Step 3: Add the county rate to 3.05%. That combined percentage is what you withhold from Indiana wages on every paycheck. Using the Indiana Paycheck Calculator means entering the employee's county and letting the math handle itself.
If an employee lives outside Indiana but works in Indiana, you withhold Indiana state income tax — but not Indiana county tax. County tax applies only to Indiana residents.
Payroll software resolves the county lookup automatically once you enter the correct county per employee. Doing it manually? Bookmark the IDOR county rate table and check it every January. Rates shift year to year.
Filing Deadlines: What Frequency You'll Likely Be On
IDOR assigns your WH-1 filing frequency based on total annual withholding. Most micro-businesses land on quarterly. Here's the full breakdown:
| Filing Frequency | Annual Withholding Threshold | WH-1 Due Date |
|---|---|---|
| Quarterly | Under $1,000/year | Last day of month after quarter ends |
| Monthly | $1,000–$20,000/year | Last day of following month |
| Semi-weekly | Over $20,000/year | Within 3 days of payroll |
SUTA follows the same quarterly rhythm — file and pay to Indiana DWD on the same cadence. Use the Indiana Employer Tax Calculator to estimate your total withholding and confirm which frequency bucket you fall into.
Frequently Asked Questions
Which county tax rate do I withhold — where my employee lives or works?
Where they live. County tax is based on the employee's county of residence as of January 1 of the tax year — your business location and the worksite address are irrelevant. This catches employers off guard most often when employees commute across county lines.
What is Indiana's state income tax rate for 2026?
Indiana's flat state income tax rate is 3.05% in 2026, down from 3.15% in 2025. The rate is scheduled to drop again in 2027 by statute — Indiana is one of the few states cutting its flat rate on a fixed legislative schedule.
Do I need to pay Indiana unemployment tax (SUTA) as a small employer?
Yes — if you pay wages of $1,500 or more in any calendar quarter, or have at least one employee on any day in 20 different weeks, you must register with Indiana DWD and pay SUTA. The new employer rate is 2.5% on the first $9,500 of each employee's annual wages, per Indiana DWD's published schedule.
Indiana payroll taxes are one of the more manageable state systems. Get the two-layer logic locked in, register before the first paycheck, pull the right county rate for each employee, and file on schedule. That's it.
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