How are contingent payment installment sales taxed under Section 453?

Question

Tyler Smith · Accepted Answer

A contingent payment installment sale occurs when the total selling price cannot be determined by the close of the tax year in which the sale takes place. This situation is frequent in private mergers and acquisitions involving earnouts or performance royalties. The IRS regulates these transactions under Temporary Treasury Regulation Section 15A.453-1(c), which prescribes three distinct methods for recovering tax basis.

1. Stated Maximum Selling Price: If the contract specifies an earnout cap or maximum purchase price under any contingency, the gross profit ratio is calculated assuming the maximum price will be realized. All available basis is recovered against this theoretical ceiling. If the seller ultimately receives less than the maximum amount, the taxpayer can claim a loss deduction in the final year or adjust the gross profit percentage in later years.
2. Fixed Period (No Stated Maximum): If the agreement does not cap the dollar payout but limits payments to a definite number of years, basis is recovered ratably over that stated term. For example, in a 5-year earnout with no cap, 20% of the asset's tax basis is allocated to each year. If payments in a given year are less than the allocated basis, no loss is recognized until the final year; instead, the excess unrecovered basis rolls forward to the following year.
3. Neither Stated Maximum Nor Fixed Period: If both the price and time period are open-ended, the arrangement is scrutinized to determine if a true sale occurred. If valid, the taxpayer must recover basis in equal annual increments over a default period of 15 years.

If these default Treasury regulations create substantial distortion in basis recovery, sellers may petition the IRS for an alternative basis recovery method before filing their return.