IRS Form 4180 — TFRP Interview and Responsible Person Investigation — Definition Glossary

Defined by Sarah Mitchell, CPA | Reviewed by: James Okafor, EA | Updated May 2026

Full Definition

IRS Form 4180 is the Report of Interview Conducted for Trust Fund Recovery Penalty Assessment — the document IRS Revenue Officers use to interview potentially responsible persons and gather information to determine whether TFRP should be assessed. The Form 4180 interview covers: the business’s corporate structure and ownership, who had authority to sign checks and make financial decisions, who had knowledge of the tax obligations, who made the decision not to pay the IRS, and whether the individual had authority and ability to direct payment to the IRS rather than other creditors. A business owner who signs Form 4180 without legal representation is essentially providing the IRS with everything needed to assess TFRP against them. Common mistakes: admitting to having check-signing authority without context, admitting to receiving notice of the tax delinquency without explaining the circumstances, and failing to identify other potentially responsible persons. Anyone asked to participate in a Form 4180 interview should have qualified tax representation before attending.

Why This Matters for Businesses With Tax Debt

Understanding IRS Form 4180 — TFRP Interview and Responsible Person Investigation is essential for any business owner navigating IRS enforcement or business tax debt. This term directly affects the resolution options available — including whether tax debt financing is a viable solution, how federal tax liens affect the business, and what the IRS can legally collect.

Related Tax Terms

• Trust Fund Recovery Penalty
• Responsible Person
• IRS Form 2751

Is Your Business Facing This Situation?

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Type of Tax Debt *-- Select Tax Debt Type --IRS 941 Payroll Tax DebtFederal Tax LienIRS Bank Levy (Active Now)Trust Fund Recovery Penalty (TFRP)State Tax DebtOIC Bridge FinancingMultiple Types

Approximate Tax Debt Amount *-- Select Amount --$10,000 - $25,000$25,000 - $50,000$50,000 - $100,000$100,000 - $250,000$250,000 - $500,000$500,000+

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Sources: IRS.gov; Internal Revenue Code (IRC); IRS Publications 1, 594, 1660, 594. Tax Funds is a financing marketplace — not a lender, CPA firm, or law firm. Content is for informational purposes only and does not constitute tax or legal advice.