Section 125 Plan in Iowa: The 2026 Employer Guide

• Iowa flat income tax: 3.9% on all W-2 wages (Iowa Code §422.5(1))
• No city income taxes in Des Moines, Cedar Rapids, Davenport, Sioux City, or anywhere in Iowa
• Iowa conforms to federal AGI under Iowa Code §422.7 — no separate state plan document rules
• FICA recapture: $76.50 per $1,000 of employee pre-tax elections (employer side)
• Net employer benefit after $35 PEPM fee: $56 to $101 per enrolled employee per month
• Employee take-home improvement: $70 to $110 per month on typical premium elections

Iowa completed a multi-year income tax reform in 2022 (Senate File 2442) that collapsed a seven-bracket system with a top rate above 8% into a single 3.9% flat tax effective for tax year 2026. The reform made Iowa one of the simplest state income tax environments in the Midwest. No Iowa city levies an earnings or income tax, which means employers from Sioux City to Davenport run the same §125 savings calculation.

What Is a Section 125 Plan?

A Section 125 cafeteria plan, named for the Internal Revenue Code section that authorizes it, is a written employer-sponsored plan that allows employees to pay for qualifying benefits with pre-tax dollars. The most common version is a premium-only plan (POP), which lets employees pay their share of employer-sponsored health insurance premiums before federal income tax, state income tax, and FICA are calculated.

When an employee elects to pay $510 per month toward health insurance through a §125 plan, that $510 never appears as taxable wages. The employer does not owe Social Security or Medicare tax on it. The employee does not owe federal income tax, Iowa income tax, or FICA on it. Both sides benefit on the same dollar.

The IRS authorized cafeteria plans under IRC §125 in 1978. The employer side of the savings, called FICA recapture, comes from the employer's own Social Security (6.2%) and Medicare (1.45%) deposits to the IRS, which decrease by the full employer FICA rate on every pre-tax dollar. For a detailed explanation of §125 mechanics, see the complete 2026 Section 125 cafeteria plan guide.

Iowa's Tax Landscape for Employers in 2026

Iowa's income tax reform created one of the cleanest employer payroll environments in the Midwest. All W-2 wages are taxed at a single 3.9% rate. Iowa has no city, county, or municipal income tax anywhere in the state. Iowa Code §422.7 adopts federal adjusted gross income as the starting point for Iowa taxable income, so a §125 pre-tax election that reduces federal wages reduces Iowa wages by the same amount automatically.

This conformity simplifies administration for Iowa employers. A cafeteria plan that is federally compliant under IRC §125 and Treas. Reg. §1.125-1 through §1.125-5 is sufficient for Iowa purposes. Iowa does not require state-specific plan document language or separate state regulatory filings.

Iowa Savings Math: Three Layers on Every Pre-Tax Dollar

A §125 plan in Iowa produces savings at three levels simultaneously. Federal income tax savings depend on each employee's marginal bracket. Iowa state income tax savings apply at the uniform 3.9% flat rate for every Iowa employee regardless of income. FICA recapture applies at 7.65% on the employer side for every dollar elected.

The employee take-home calculation matters for explaining §125 to Iowa workers. An employee electing $510 per month in pre-tax premiums does not take home $510 less. Their take-home pay decreases by only $510 minus the income taxes and FICA they avoid paying. At a 22% federal bracket and Iowa's 3.9% rate, the effective cost to the employee is closer to $338 per month, not $510. The actual take-home reduction is $338. The employee's net pay increases relative to the alternative of paying premiums with after-tax dollars.

Iowa Paycheck Example: Collins Aerospace, Cedar Rapids

Collins Aerospace, an RTX subsidiary, employs approximately 7,000 people in Cedar Rapids, making it one of Iowa's largest private employers. Consider a Collins Aerospace avionics engineer earning $82,000 per year, filing single, electing $510 per month ($255 per biweekly pay period) in health insurance premiums through a §125 plan.

The Collins Aerospace engineer's take-home pay increases by approximately $185 per month despite electing $510 per month in pre-tax health premiums. That improvement results from $56.10 in federal income tax avoided, $19.51 in employee FICA avoided, and $9.95 in Iowa state income tax avoided per paycheck, across 26 biweekly pay periods.

On the employer side, Collins Aerospace avoids $15.81 in Social Security and $3.70 in Medicare tax per paycheck per employee. Across 7,000 Iowa employees all electing premiums pre-tax, the annual FICA recapture runs into the millions. After Benecor's $35 PEPM administration fee, the net employer benefit at that election level is $66.56 per enrolled employee per month.

Major Iowa Employers and the §125 Opportunity

Iowa's economy concentrates employment in four sectors that produce large §125 plan ROI: financial services and insurance in the Des Moines metro, aerospace and defense manufacturing in Cedar Rapids, agricultural equipment manufacturing in Waterloo and Dubuque, and health care systems statewide.

Des Moines is one of the top insurance and financial services cities in the United States. Principal Financial Group, headquartered in Des Moines, employed approximately 18,000 people globally in 2025 with several thousand in Iowa. Wellmark Blue Cross and Blue Shield, EMC Insurance, Farm Bureau Financial Services, Global Atlantic, and Nationwide Mutual's Iowa operations all maintain large Des Moines-area workforces. The irony is not lost on Iowa benefit professionals: companies that sell health insurance to employers often have their own employees underusing pre-tax benefit optimization.

In Cedar Rapids, Collins Aerospace employs the region's largest aerospace defense workforce. The Quaker Oats facility (PepsiCo) in Cedar Rapids operates the world's largest oat mill and employs a substantial food manufacturing workforce. Both represent mid-size Iowa employer populations where §125 FICA recapture compounds across hundreds of employees.

John Deere's Iowa manufacturing footprint spans Waterloo (John Deere Waterloo Tractor Operations, approximately 3,200 employees), Dubuque (John Deere Dubuque Works, approximately 2,500 employees), and Ankeny (John Deere Financial). These facilities represent concentrations of hourly manufacturing workers with significant health insurance premium contributions and substantial potential §125 savings.

Iowa's health system employers, including UnityPoint Health (Des Moines, approximately 13,000 Iowa employees), MercyOne, and the University of Iowa Health Care system, represent another major §125 opportunity pool. Health care workers pay a disproportionately high share of employer health insurance premiums. Pre-tax elections under §125 are one of the most direct tools for improving health care worker take-home pay. See the Minnesota §125 guide for comparable health system analysis in the Upper Midwest.

Iowa Eligibility and Plan Rules

Iowa employers must follow federal §125 eligibility rules because Iowa has no state-specific cafeteria plan statute. Under IRC §125(b), a cafeteria plan must satisfy nondiscrimination tests to prevent highly compensated employees (those earning more than $135,000 in 2026) from receiving a disproportionate share of pre-tax benefits.

Iowa employers may structure their §125 plan documents to exclude part-time employees (fewer than 30 hours per week), seasonal workers, or employees in their first 90 days of employment. Agricultural processing employers in Iowa who hire seasonal workers during harvest periods often use a 90-day waiting period to keep plan eligibility manageable.

H-2A agricultural guest workers are not eligible for §125 plan participation. H-2A visa holders are nonimmigrant aliens performing agricultural labor under temporary work authorization. They do not qualify as employees under IRC §3401(c) for purposes of FICA, and the exclusion from §125 follows from this classification.

Iowa nonprofit employers with 501(c)(3) status may sponsor §125 plans for their W-2 employees. Iowa state and local government entities, including county health departments, Iowa school districts, Iowa state agencies, and Iowa county supervisors' offices, are excluded from sponsoring cafeteria plans under IRC §125(d)(1)(B).

For a full breakdown of which Iowa employer types benefit most and how the nondiscrimination tests work in practice, see the complete §125 cafeteria plan guide. For comparison with how FICA math works for Iowa employers compared to those in the region, see the Nebraska §125 guide.

How to Set Up a Section 125 Plan in Iowa

Iowa employers can have a compliant §125 premium-only plan running in approximately 30 days. The steps below apply to any Iowa employer from a 2-person Des Moines startup to a 5,000-person Cedar Rapids manufacturer.

1. 1
   Model Iowa-specific savings

   Calculate the three savings layers for your Iowa workforce: federal income tax at each employee's marginal rate, Iowa state income tax at the 3.9% flat rate (Iowa Code §422.5(1)), and employer-side FICA recapture at 7.65% on every dollar elected pre-tax. Iowa has no city or county income taxes in any of its 99 counties, so the savings model is identical whether your employees work in Des Moines, Cedar Rapids, Davenport, or Sioux City.

2. 2
   Draft Iowa-compliant plan documents

   Prepare a written cafeteria plan document that satisfies IRC §125(d)(1). Iowa conforms to federal adjusted gross income under Iowa Code §422.7, so a federally compliant plan document is sufficient. Include the plan year, eligible employee definition, benefit election period, and maximum salary reduction amounts. Iowa does not impose separate state-level cafeteria plan filing requirements beyond the federal rules.

3. 3
   Run Iowa payroll setup

   Configure your Iowa payroll system to separate pre-tax premium deductions from taxable wages before calculating Iowa withholding. Iowa employers report state income tax on Form IA 44-105 (Iowa Withholding Tax Quarterly Return). The Iowa Department of Revenue requires pre-tax salary reductions to flow through Box 12 (Code DD or W) on the W-2, consistent with IRS W-2 reporting. Verify that your payroll software suppresses Iowa taxable wages for the elected amount.

4. 4
   Conduct open enrollment

   Distribute a Summary Plan Description to all eligible Iowa employees before the first plan year begins. Iowa has no mandated enrollment window beyond the federal 30-day new-hire rule. Annual open enrollment typically runs 2 to 4 weeks in October or November for a January 1 plan year start. Elections are irrevocable for the plan year except for qualifying life events defined in Treas. Reg. §1.125-4.

5. 5
   Launch pre-tax payroll deductions

   Process the first payroll with pre-tax health premium deductions active. Verify that Iowa taxable wages on the pay stub are reduced by the elected amount before Iowa withholding is applied. Run a parallel check on employer FICA liability: the employer Social Security deposit to the IRS should decrease by 6.2% of total employee elections each pay period, and employer Medicare by 1.45%. Track cumulative FICA recapture monthly against your annual admin fee.

6. 6
   File and review Iowa compliance

   At year end, reconcile Iowa W-2 Box 16 (Iowa wages) with federal Box 1 wages. The difference should equal the total pre-tax health premium elections for each employee. Iowa uses a separate state W-2 filing system; transmit Iowa W-2s and the IA W-2 Transmittal (Form 44-007) to the Iowa Department of Revenue by February 15. Review IRS Form 941 quarterly filings to confirm cumulative FICA recapture matches your savings model projection.

Benecor coordinates all six steps for Iowa employers, including plan document preparation, Iowa payroll integration, employee enrollment support, and year-end W-2 reconciliation. Administration is $35 per enrolled employee per month, billed from the IRS Form 941 FICA deposit reduction, not from operating cash.