How to Structure a Seller Financing Contract in Puerto Rico

What is a seller financing contract and how is it different from a bank mortgage?

In a seller financing arrangement — also called "owner financing" — the property owner acts as the lender. Instead of the buyer applying for a bank mortgage, both parties agree directly on the loan terms: interest rate, term, financed amount, and payment schedule. The buyer makes monthly payments to the seller, not to a financial institution.

This structure is more common than it appears in Puerto Rico. When a buyer does not qualify for conventional bank financing, when a fast closing is a priority, or when the property has characteristics that complicate a bank appraisal, seller financing can be the only option that works for both parties.

The key difference from a bank mortgage is not just legal — it is operational. A bank has an entire department to collect payments, apply interest correctly, issue statements, and prepare tax forms. When you are the lender, all of that responsibility falls on you. The contract you write at the start determines how organized or chaotic that process will be over the next 10, 15, or 20 years.

Essential terms: interest rate, loan term, financed amount, and amortization schedule

Every seller financing agreement must clearly specify the following: the total financed amount (sale price minus the down payment), the annual interest rate (fixed or variable, and how it adjusts if variable), the loan term in years, and the monthly payment amount. That last figure is derived from the first three using an amortization schedule.

The amortization schedule is not an optional document — it is the backbone of the agreement. It shows the buyer how much of each payment goes to principal and how much goes to interest, and it tells the seller how much interest income to report each year. Without a correct amortization schedule, you cannot calculate the PR Hacienda Form 480.7A or IRS Form 1098, and the numbers on your tax return will not add up.

If the loan includes a balloon payment — a large lump sum at the end of the term that pays off the remaining balance — that date and amount must be clearly specified in the contract. Misunderstandings about balloon payments are one of the most common sources of conflict between private lenders and borrowers.

Protection clauses for the seller: late fees, default, and foreclosure

A well-drafted contract protects the seller with clauses that define exactly what happens when the buyer does not pay. The most important are: the grace period (how many days the buyer has after the payment date before a late fee applies), the late fee amount (flat fee or percentage of the monthly payment), and the definition of default (how many consecutive missed payments constitute a breach).

The acceleration clause is equally important. This clause allows the seller to demand the full outstanding loan balance if the buyer defaults. Without it, you could be forced to sue for individual missed payments one by one, rather than claiming the entire balance at once. For a private lender protecting an investment, the acceleration clause is non-negotiable.

In Puerto Rico, the foreclosure process for private lenders follows the same general principles as for financial institutions, but without an institutional legal team behind you. That is why getting the contract language right from the start — with clear, well-documented clauses — is the best preventive investment. Having a local attorney review the contract before signing is worth more than any adjustment made after a dispute arises.

Managing Form 480.7A from the first payment

Form 480.7A is the mortgage interest information return that every private lender in Puerto Rico must issue to the borrower once a year. You file it with Hacienda and deliver a copy to the borrower so they can claim the mortgage interest deduction on their Puerto Rico tax return. The form is required for properties located in Puerto Rico regardless of the amount of interest received.

The problem many private lenders face in January is not filling out the form — it is not knowing how much interest they collected during the year because they did not keep accurate records from the start. If you do not have the amortization schedule updated with every payment you received, you have to reconstruct that calculation retroactively, and if there were late or partial payments, the math gets complicated.

The solution is straightforward: from the first payment, every time you receive money from the borrower, record the date, the total amount, how much went to principal, and how much went to interest. Those are exactly the figures the 480.7A requires. If the borrower pays via ATH Móvil, Zelle, or ACH, the additional challenge is making sure the confirmation emails for those payments are tied to the correct amortization schedule and not lost in your inbox.

How Lend. automates payment tracking and tax forms from day one

Lend. is built for exactly this workflow. You enter the loan terms once — amount, rate, term, first payment date — and the system automatically generates the full amortization schedule. Each monthly payment has a predetermined principal and interest split, and the outstanding balance updates with every confirmed payment.

When the borrower pays via ATH Móvil, Venmo, PayPal, or Zelle, confirmation emails are forwarded to the system and payments are matched automatically to the correct billing period. Nothing needs to be recorded manually. If the payment arrives after the grace period you configured in the agreement, the late fee is applied automatically.

When January arrives, Form 480.7A is generated directly from the confirmed payment records. The borrower gets their form showing the total interest paid during the year and the outstanding balance as of December 31. You have the same numbers for your tax return, and the total time to generate the forms is minutes, not hours.