How to Do Payroll in Iowa: A Step-by-Step Guide

Last reviewed: July 2026

If you just hired your first Iowa employee, payroll can feel like a maze of forms and deadlines. It isn't, once you break it into pieces. Here's the full sequence, from your very first registration to the W-2 you'll mail next January.

Step 1: Get Registered

Before you calculate a single paycheck, you need a federal EIN from the IRS, a state withholding account, and an SUI account. We cover this in detail in our Iowa new employer registration guide, but the short version is this: apply for your EIN at IRS.gov, then register with the Iowa Department of Revenue and Iowa Workforce Development. Layer on workers' compensation insurance, and you're cleared to hire.

Don't skip new hire reporting while you're at it. Iowa requires you to report each new hire to the Centralized Employee Registry within 15 days, well ahead of the 20-day federal deadline.

Step 2: Set Up State Withholding

Every employee fills out an Iowa W-4 (Form 44-019) when they start, and again whenever their situation changes. It tells you their filing status and any adjustments that affect how much state income tax comes out of each check. If an employee never turns one in, Iowa requires you to withhold as if they claimed no allowances at all, so chase down that form before the first payroll.

Iowa moved to a flat individual income tax rate of 3.8% for 2026, and the Department of Revenue publishes updated withholding formulas and tables each year to match. Most payroll software applies these automatically, but it's worth confirming your provider pulled the current tables rather than last year's. Our W-4 Helper walks through the form field by field if you want to double-check an employee's entry, and our paycheck calculator shows gross-to-net for a given pay rate.

Step 3: Register for SUI and Calculate the Tax

State Unemployment Insurance is an employer-only tax, meaning you don't deduct it from employee wages. For 2026, new non-construction employers start at a 1.000% rate, new construction employers start at 5.400%, and the tax applies only to the first $20,400 of each employee's wages for the year. Once that wage base is hit for an employee, SUI on their pay stops for the rest of the calendar year.

Rates get reassigned annually based on your claims history, so a business with no unemployment claims typically sees its rate drop over time. See our Iowa SUI Rates 2026 guide for the full rate schedule.

Step 4: Pay Frequency and Final Pay

Iowa's wage payment law lets you pay on a monthly, semimonthly, or biweekly schedule, provided your paydays are regular and set in advance. You can't shift pay dates around at will once you've established a schedule. Wages are due within 12 days, excluding Sundays and legal holidays, after the end of the pay period that generated them.

When someone is fired or resigns, Iowa doesn't require an immediate final check the way some states do. Instead, you owe all earned wages by the next regular payday for the period in which they worked. Pay stubs also need to show hours worked, wages earned, and deductions taken, every payday, for every employee. Our Iowa payday laws guide has the details, including how commission pay is handled differently.

Step 5: Deposits and the Filing Calendar

On the federal side, most new small employers deposit withheld income tax and FICA monthly, using EFTPS, and file Form 941 quarterly to reconcile what they withheld against what they owed. Iowa withholding deposits follow their own schedule, assigned when you register, and quarterly withholding returns are filed through the Department of Revenue's online system regardless of your deposit frequency.

SUI is reported and paid quarterly to Iowa Workforce Development. Missing a quarterly SUI filing, even with zero wages to report, can trigger the same kind of penalty as a late payment, so file every quarter until you formally close the account.

Step 6: Year-End W-2s

By January 31 each year, you issue a W-2 to every employee who worked for you during the prior calendar year and file copies with the Social Security Administration. Iowa also requires an annual withholding reconciliation with the Department of Revenue, which squares up what you withheld throughout the year against your quarterly filings. If any of your workers were independent contractors rather than employees, check our W-2 vs. 1099 guide before you file anything.

Running all of this by hand is doable for one or two employees, but the tax tables, deposit deadlines, and quarterly filings pile up fast once you add a third or fourth. Gusto automates the Iowa and federal withholding calculations, files SUI and quarterly returns for you, and generates W-2s at year-end, so nothing falls through the cracks during your first year as an employer.

Frequently Asked Questions

What do I need before I run my first payroll in Iowa?

You need a federal EIN, a withholding account with the Iowa Department of Revenue, an SUI account with Iowa Workforce Development, workers' compensation coverage, and a completed Iowa W-4 from every employee. Get all five in place before you calculate a single paycheck.

How often can I pay employees in Iowa?

Iowa law allows monthly, semimonthly, or biweekly pay periods, as long as paydays fall at regular, consistent intervals you set in advance. Wages are due within 12 days, excluding Sundays and legal holidays, after the end of the pay period.

What is the Iowa withholding tax rate for 2026?

Iowa uses a flat 3.8% individual income tax rate for 2026, and the Department of Revenue's withholding tables are built around that flat rate. Employees still file an Iowa W-4 so you know their filing status and any adjustments.

Do I need to file anything with Iowa at year-end?

Yes. You issue a W-2 to every employee and file your annual withholding reconciliation (VSP) with the Iowa Department of Revenue, in addition to the federal W-2 and W-3 filings with the Social Security Administration.