We are structuring a portion of our sale as a substantial seller note using the Section 453 installment method, but the buyer wants the flexibility to defer interest payments if the company misses its post-close debt service coverage ratios. How do we protect our tax deferral and cash flow security?

Question

Tyler Smith · Accepted Answer

An installment sale under Section 453 of the Internal Revenue Code is an excellent tool for deferring tax liability, but allowing the buyer to arbitrarily defer interest or principal payments based on post-close performance destroys your financial security. You must separate your tax planning from the buyer's operating risks.

Under Section 453, you only pay tax on the gain as you receive the payments. However, if the buyer defaults or continually defers payments, you face the double risk of unpaid capital and potential tax complications. To prevent this, your seller note must have strict, non-contingent payment terms. Do not let the buyer tie your installment payments to their debt service coverage ratios.

To secure your cash flow, negotiate a parent company guarantee or secure the seller note with a first-priority junior lien on the assets of the operating business. If the buyer misses a payment, it must trigger an immediate default, accelerating the entire balance of the note.

If the primary bank lender requires subordination, limit the subordination terms. Agree that your payments can only be blocked if there is an active, written default on the senior bank debt, not just because the buyer wants to preserve operational cash. Keep your installment note clean, structured, and legally protected so you can reap the tax-saving benefits of Section 453 without becoming the buyer's unpaid, high-risk junior lender.