Offer in Compromise — Doubt as to Liability — Definition Glossary

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

Full Definition

An Offer in Compromise based on Doubt as to Liability (DATL) allows a taxpayer to challenge the underlying tax assessment itself — arguing that the IRS incorrectly determined the tax owed. Unlike Doubt as to Collectability (which accepts the assessment as correct but argues inability to pay), DATL attacks the validity of the tax liability. Common DATL situations: the IRS assessed a TFRP but the taxpayer was not actually a “responsible person”; the IRS assessed income taxes on amounts that were not actually income; the IRS calculated 941 taxes on amounts that should not have been included in wages. DATL OICs do not require the same financial analysis as DOTC OICs — the taxpayer must show there is a genuine dispute about the correct tax amount. DATL OICs must be submitted before the normal OIC financial analysis would apply, making them a faster resolution path in appropriate cases.

Why This Matters for Businesses With Tax Debt

Understanding Offer in Compromise — Doubt as to Liability 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

• Offer in Compromise
• Trust Fund Recovery Penalty
• Responsible Person

Is Your Business Facing This Situation?

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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.