Iowa Employer Tax Information
To sign up for Square’s online payroll services in Iowa, you must be registered with the Iowa Department of Revenue (DOR) and Iowa Workforce Development so we can pay and file your state taxes.
| Agency | Required Tax Information | Format |
| Iowa Department of Revenue (DOR) | Iowa Withholding Permit Number | 00-0000000-000 (12 digits) or 0-00-000000 (9 digits) |
| Iowa Filing Frequency | Semi-Monthly, Monthly, or Quarterly | |
| Iowa Workforce Development | Iowa UI Account Number | 00000000 (8 digits) |
| Iowa Contribution Rate | X% |
Iowa New Employer Registration
Iowa Withholding Permit Number and Filing Frequency
Register online as a new business.
You will receive your Withholding Permit Number and Filing Frequency immediately after completing the registration online.
Iowa UI Account Number
Register online as a new business.
You will receive your UI account number immediately after completing the registration online.
Iowa Unemployment Insurance Contribution Rate
For more information about your rate, contact the agency at 888-848-7442 or by email at IWDuitax@iwd.iowa.gov. See additional instructions below on how to locate your rate.
Find Your Iowa Tax ID Numbers and Rates
Iowa Withholding Permit Number and Filing Frequency
Look these up online or on previous correspondence from the IA Department of Revenue.
If you’re unsure, contact the agency at 515-281-3114 or 800-367-3388.
Iowa UI Account Number
Look this up online or on any previous Notice of Unemployment Insurance Contribution Rate from IA Workforce Development.
If you’re unsure, contact the agency at 888-848-7442.
Iowa Contribution Rate
Look this up online or on the Notice of Unemployment Insurance Contribution Rate mailed by IA Workforce Development each year.
If you’re unsure, contact the agency at 888-848-7442.
Iowa Payroll Tax Details
Square Payroll processes the following per the frequency below to the listed state agencies:
| Agency | Filing | Frequency |
| Iowa Department of Revenue (DOR) | Wage and Tax Statement (W-2) | Annually |
| Annual Verified Summary Report | Annually | |
| Withholding Quarterly Tax Return | Quarterly | |
| Withholding Tax Payment Voucher | Semi-Monthly/Monthly | |
| Withholding Tax Payment | After Every Pay Run | Iowa Workforce Development | Unemployment Insurance Payment | Quarterly |
| Employer’s Contribution & Payroll Report (IA 65-5300) | Quarterly | |
| Iowa Department of Human Services (DHS) | New Hire Reporting | As Needed |
How to Find Iowa Reporting Unit Numbers
Iowa employers must assign a Reporting Unit Number to each employee when adding them to Square Payroll. This is required because Iowa Workforce Development requires us to include each employee’s Reporting Unit Number in the unemployment insurance (UI) tax filing (Form IA 65-5300) due each quarter.
You can find all active Reporting Unit Numbers for your business in My Iowa UI:
Log in to My Iowa UI.
Click Reporting Units > Active Reporting Units.
If you’re unable to locate this, please contact Iowa Workforce Development directly at 888-848-7442.