An IRS due diligence checklist serves as the structural backbone for any serious financial transaction, ensuring that the Internal Revenue Service’s requirements are met long before the deal closes. This systematic approach moves beyond simple document collection, focusing instead on the verification of income, compliance history, and potential liabilities that could transfer with the ownership change. For accountants, attorneys, and business buyers, treating this process as a strategic risk management tool rather than a bureaucratic hurdle is essential for protecting capital and securing a clean title.
Foundations of IRS Due Diligence
The foundation of effective IRS due diligence lies in understanding that the tax authority’s interest does not end with the filing deadline. Unlike state sales tax or payroll tax, which are often handled by specialized vendors, federal tax compliance requires a deep dive into the specific entity or individual history. This initial phase involves confirming the accuracy of Employer Identification Numbers (EINs), validating the correct tax classification (S-corp, C-corp, partnership, or sole proprietorship), and ensuring that the subject has been filing returns consistently under the correct structure.
Verification of Identity and Structure
Before analyzing specific line items on a return, professionals must verify the legal entity exists and is in good standing with the IRS. This involves reviewing the SS-4 form or the original formation documents to ensure the name matches the application exactly. A mismatch between the legal name on the contract and the name on the tax returns is a red flag that can indicate fraud or simple administrative error, potentially derailing financing or causing title issues during the closing process.
Analysis of Compliance History
Moving beyond the static documents, the checklist must address dynamic compliance history. This requires pulling IRS transcripts to review filed returns for the past five years, looking for patterns of late filings, extensions, or adjustments. It is not enough to see that taxes were paid; one must verify that the correct amount was paid based on the actual income and deductions claimed. Unreported income or aggressive deductions that were later flagged by the IRS can create significant contingent liabilities for the new owner.
Operational and Financial Verification
Operational due diligence focuses on the money flowing in and out of the business. The checklist should mandate a reconciliation between the tax returns and the business’s financial statements, specifically the Profit and Loss and Balance Sheet. Discrepancies between book income and taxable income are common, but the reason for the gap must be justified. Look for legitimate adjustments like depreciation or non-deductible expenses, but be wary of excessive shareholder loans or vague "miscellaneous" deductions that lack proper substantiation.
Payroll and Employment Tax Scrutiny
For businesses with employees, the IRS due diligence checklist places heavy emphasis on payroll compliance. Reviewing Form 941 filings ensures that federal income tax, Social Security, and Medicare taxes were withheld and remitted correctly. Failure to do so exposes the purchasing entity to the Trust Fund Recovery Penalty (TFRP), where responsible parties can be held personally liable for unpaid payroll taxes. Verifying that 1099 contractors were correctly classified versus W-2 employees is also a critical step in mitigating future audit risk.
Asset Basis and Depreciation Schedules
Another technical but vital component of the checklist is verifying the basis of major assets. The IRS tracks the original cost of equipment, vehicles, and real estate against the claimed depreciation. Buyers need to know the tax basis to understand the future capital gains exposure when the asset is eventually sold. A thorough review of the depreciation schedules ensures that the buyer steps into the correct tax lot and avoids unexpected depreciation recapture taxes at the exit stage.
