We are considering carrying a $7 million seller note over six years under Section 453 to defer taxes, but our CPA mentioned an annual interest penalty on notes over $5 million. How does Section 453A impact the economics of large installment sales?

Question

Tyler Smith · Accepted Answer

Section 453 allows you to defer capital gains tax by recognizing income only as cash payments are received. However, Section 453A exists specifically to prevent high-value sellers from using long-term notes as an interest-free loan from the federal government.

If the total face value of your installment obligations arising during a tax year exceeds $5 million, Section 453A imposes an annual interest charge on the deferred tax liability attributable to the portion above that threshold.

The calculation is mechanical. The IRS calculates the applicable percentage, which is the amount of the installment note exceeding $5 million divided by the total note balance. That percentage is multiplied by your deferred tax liability, and the resulting amount is assessed an annual interest charge based on the underpayment rate defined in Section 6621.

This does not invalidate the benefits of seller financing, but it alters your net yield.

First, the interest rate you charge the buyer on the seller note must comfortably exceed both inflation and the Section 453A interest rate. If you write a seller note at five percent interest and the IRS charges you four percent on the deferred tax balance, your real cash yield collapses once you factor in credit risk.

Second, Section 453A also triggers immediate recognition of deferred gain if you pledge the installment note as collateral for another borrowing. You cannot carry the note, defer the tax, and borrow against the note to fund a new venture.

Account for this calculation on your V/TO long-term financial plan before agreeing to carry notes above $5 million.