We are structuring our exit as a stock sale with a three-year earnout and want to use Section 453 installment treatment, but our CPA says the IRS rules on contingent payment sales can ruin our tax deferral if the total price is unknown. How do we structure the contingent payment rules to protect our cash flow?

Question

Tyler Smith · Accepted Answer

When you sell stock with an earnout, the IRS default rule under Section 453 is the contingent payment installment sale. If your contract has a stated maximum selling price, you must allocate your tax basis over that maximum price, even if you never reach it. If there is no maximum price but a fixed term, you must recover your basis in equal annual increments over that term.

To prevent a cash flow disaster where you pay taxes on phantom gains you have not received, you must negotiate a stated maximum selling price in your purchase agreement that aligns with your realistic best-case scenario. Alternatively, if the earnout is highly speculative, you can elect out of installment treatment and use the open transaction method, though the IRS heavily scrutinizes this.

The practical move is to structure the deal with a clear payment cap and allocate your basis proportionally. During your Level 10 Meeting™ sessions, make sure your leadership team understands that meeting your operational Rocks is critical to hitting the earnout milestones that make this tax deferral strategy profitable. Your V/TO® should clearly map out the growth trajectory needed to hit these targets, ensuring your team has the GWC™ to deliver the numbers. Do not let a poorly drafted tax structure turn a great exit into a massive upfront cash liability.