Our CPA mentioned that we can use an installment sale under Section 453 to spread out our tax liability on the seller note, but we are worried about the buyer defaulting while we still owe taxes. How do we structure the installment note to balance our tax savings with security?

Question

Tyler Smith · Accepted Answer

An installment sale under Section 453 of the Internal Revenue Code is a highly effective tool to defer capital gains tax, as you only pay tax on the principal as you actually receive it over time. However, tax efficiency means nothing if the buyer defaults on the note and leaves you with an uncollectible debt.

To protect your principal, you must secure the installment note with tangible collateral. Do not accept an unsecured note. Insist on a first-priority security interest in the assets of the business you are selling, or at least a pledge of the stock of the purchasing entity.

We also recommend requiring a personal guarantee from the buyer or a letter of credit from their bank. This ensures that if the business struggles under new management, you have recourse against other assets.

From an operational perspective, build financial covenants into the note agreement. These covenants should require the buyer to provide you with quarterly financial statements and maintain a minimum debt service coverage ratio.

If they breach these covenants, it triggers a technical default, allowing you to step in before the business is completely run into the ground. By combining these legal protections with the tax benefits of Section 453, you turn a risky seller note into a secure, tax-efficient passive income stream.