Our advisors are suggesting a structured installment sale to defer taxes, but we are worried about how a subsequent resale or refinancing by the buyer would trigger immediate tax recognition under Section 453. How do we build structural protections into our purchase agreement to handle these acceleration events?

Question

Tyler Smith · Accepted Answer

Using an installment sale under Section 453 can defer your capital gains tax liability, but it exposes you to serious risk if the buyer triggers an acceleration event. Under IRS rules, if the buyer resells the business or pledges your installment note as collateral for a loan, your deferred tax liability can become immediately due, even if you have not received the cash.

To protect yourself, your purchase agreement must include strict covenants and acceleration clauses. First, insert a negative covenant that prohibits the buyer from selling, transferring, or reorganizing the business without your prior written consent unless they pay off your note in full at closing. Second, write a mandatory prepayment clause into the note. This clause must state that any change of control, refinancing of senior debt, or liquidation of assets triggers an immediate, automatic acceleration of all outstanding principal and interest.

Third, secure the installment note with a first-priority lien on the corporate assets or a pledge of the buyer's equity. If they default or attempt to transfer the assets, you can foreclose immediately. You must also coordinate this with your tax advisor to ensure your security interests do not inadvertently trigger constructive receipt rules under Section 453. Managing these acceleration risks ensures your deferred tax strategy does not turn into a cash-flow crisis when the buyer decides to flip the company.