Iowa DOR Income Tax Audit Protest

The situation

Marcus, 55, owns Heartland Custom Fabrication LLC, a Cedar Rapids, Iowa job shop with 18 employees producing custom metal components for agricultural equipment manufacturers. Annual revenue: $3.2M. In March 2026 Marcus received an Iowa DOR assessment: "Iowa Corporation Income Tax: $22,800 (penalty $3,420 + interest $1,800 = $28,020 total), tax period 2022–2024."

The IDR auditor disallowed $22,800 in Iowa Research Activities Credits Marcus claimed for Iowa Code § 422.10. The auditor's position: Heartland's prototyping work for agricultural equipment customers doesn't qualify as "qualified research" because it's "funded by contract with a third party" (the agricultural equipment manufacturer paid for the prototypes).

Marcus has 60 days to file a written appeal with IDR's Appeals Section.

(a) The R&D credit disallowance may be wrong based on how the contract work was structured. Iowa's R&D credit under § 422.10 follows federal Sec. 41 definitions. The "funded research" exclusion (Sec. 41(d)(4)(H)) disqualifies research only when payment is made regardless of whether the research succeeds. If Heartland's contracts provide that payment is contingent on success of the prototype, or if Heartland retains the right to use the research for its own benefit, the research may still qualify. Marcus needs to review his contracts and the "funded research" vs. "contract research" distinction.

(b) Iowa's qualified research activities test has a geographic requirement. Iowa § 422.10 requires that qualifying research activities be performed in Iowa. Marcus's prototyping is done in his Cedar Rapids facility, that's Iowa-sited research. The auditor may not have clearly distinguished between the Iowa nexus requirement (met) and the "funded research" exclusion (contested).

(c) The two-stage appeal path has strategic implications. The IDR Appeals Section is composed of IDR employees, not independent. Even a well-prepared informal appeal may fail. But building a complete record with specific documentation (contracts, lab notebooks, project records, cost allocation) at the IDR Appeals Section stage is essential before taking the case to a DIAL independent ALJ.

(d) BerganKDV quoted Marcus $5,500 for audit file review, written appeal, and informal conference representation. The R&D credit analysis + written appeal + penalty abatement argument is largely self-executable with the right Iowa-specific structure.

Who receives this

Iowa small and mid-size businesses receiving Iowa DOR income tax assessments for disputed R&D credits, farm income/expense deductions, or passthrough income. Primary: Iowa manufacturers and technology companies contesting Iowa Research Activities Credit disallowances. Secondary: Iowa farm operations with agricultural income and expense disputes; Iowa businesses contesting residency-based assessments.

Why the agency will not advise you

IDR cannot advise audit respondents on how to contest its own assessments. IDR's Appeals Section is an internal IDR employee reviewer, not independent. The independent DIAL ALJ hearing is available but only after the informal process. Iowa CPA firms and tax attorneys charge $2,500–$10,000 for protest representation. No self-serve Iowa income tax audit protest navigator exists.

Key facts, with sources

• Iowa's income tax audit appeal process has two stages: (1) Informal appeal to IDR's Appeals Section, the taxpayer files a written protest and the Appeals Section reviews; this may include an informal conference. The Appeals Section tries to resolve disputes without formal hearing, but the reviewer is an IDR employee. (2) If the informal process fails, the taxpayer may request a formal hearing before an independent administrative law judge (ALJ) from DIAL, the Department of Inspections, Appeals, & Licensing. DIAL provides independent ALJs for almost all Iowa agency disputes, including IDR. The ALJ is not an IDR employee. Further appeal from a DIAL ALJ decision goes to Iowa District Court on the record made at the hearing. Iowa's IDR modernization initiative has improved digital taxpayer access (improved payment plans, online account features) but does not include protest strategy guidance. Source: Taxpayer Bill of Rights — Iowa Department of Revenue · Administrative Hearings — Iowa Department of Inspections, Appeals, & Licensing (DIAL) · Modernization — Iowa Department of Revenue
• Iowa income tax audits of businesses most commonly focus on: (1) Farm income and agricultural deductions, Iowa is a top-5 agricultural state with over 85,000 farms; IDR audits farm operations for proper reporting of crop insurance proceeds, commodity sales, and capital vs. operating expenses; (2) Iowa Research Activities Credit (§ 422.10), Iowa's R&D credit requires qualifying research activities be performed in Iowa and meet the federal incremental research test; IDR auditors frequently dispute whether activities qualify and whether the Iowa nexus requirement is met; (3) S-corp and farm LLC passthrough income, IDR audits passthrough entity owners for Iowa-source income; (4) Iowa's Section 179 conformity, Iowa previously decoupled from federal Section 179 limits, creating Iowa-specific depreciation differences; reconciliation errors are common audit findings. Iowa's flat income tax rate (transitioned to flat rate under 2022 tax reform) simplifies assessments but IDR enforcement of the transition rules has created new audit activity. Source: Iowa Tax Webinars for Business (free) — IASourceLink · Iowa Department of Revenue

When to bring in a professional

Self-serve responses fit routine cases: clear facts, amounts a business can absorb, and a deadline still ahead of you. Bring in a licensed professional when the amount at stake is large relative to their fee, the facts are genuinely disputed, criminal exposure is possible, or the deadline has already passed. A short paid consultation to sanity-check your plan is often worth it even when you handle the filing yourself.

All sources for this guide

1. Taxpayer Bill of Rights — Iowa Department of Revenue
2. Administrative Hearings — Iowa Department of Inspections, Appeals, & Licensing (DIAL)
3. Modernization — Iowa Department of Revenue
4. Iowa Tax Webinars for Business (free) — IASourceLink
5. Iowa Department of Revenue