Subject-To vs Seller Finance: the one test that separates them

Ask ten creative finance investors the difference and you get ten answers, most of them partly right. The confusion is understandable: both structures end with you controlling a property, both skip a bank approval, and both get called “creative financing” in the same breath. But they are not variations of one idea. They are two different answers to one question, and here is the question.

Subject-To: you inherit a loan that stays in the seller’s name

In a Subject-To deal you take title to the property, and the seller’s existing mortgage stays exactly where it is — same lender, same balance, same interest rate, same monthly payment, still recorded in their name. Nothing is refinanced. No new note is created. You simply start making that payment, usually through a servicing company so there is a paper trail the seller can check.

What makes it powerful is the rate. A seller who financed in 2021 at 3.1 percent is holding an asset you cannot buy anywhere in 2026, and Subject-To is the only structure that preserves it. You are not buying the house so much as buying the debt attached to it, and the cheaper that debt is relative to today’s market, the more the structure is worth doing.

The constraint is equity. If the seller owes $310,000 on a property worth $330,000, Subject-To works beautifully, because there is almost nothing to pay them and the loan carries the deal. If they owe $40,000 on the same property, you would have to hand them roughly $290,000 in cash to close, and the cheap loan you were trying to preserve is now a rounding error. Subject-To rewards low equity. That is the opposite of what most investors instinctively look for.

Seller Finance: the seller becomes your lender on a new note

In a Seller Finance deal the seller carries the paper. You and they agree on a price, a down payment, an interest rate and a term, and they hold a note and mortgage against the property for that balance. If there was a loan on the house, it gets paid off at closing out of your down payment, or wrapped — but the defining fact is that a new obligation, one you personally signed, now exists.

This is the structure for the seller who owns free and clear, or close to it. They have no loan to preserve, they do not want a lump sum and a capital gains bill, and they would rather collect a monthly cheque for fifteen years. You get terms no bank will write: five percent down, a rate you negotiated in a kitchen, sometimes interest only for the first two years while you stabilise the rent.

The constraint is that everything is negotiated, which means everything can fall apart. There is no existing payment to point at as fair. The seller’s brother-in-law will tell them the rate is too low. Getting a Seller Finance deal signed takes more conversation than a Subject-To takes, and the conversation is about numbers you proposed.

“Isn’t Subject-To illegal?” No, and the confusion has a name

This objection comes up on every forum thread, and it is always the due-on-sale clause. Nearly every residential mortgage contains one: if the property transfers, the lender has the right to demand the full balance. Selling a house Subject-To transfers the property without paying off the loan, so it gives the lender that right.

A right the lender may exercise is not a crime. Due-on-sale is a contract term, and breaching a contract term is a civil matter between the borrower and the lender — not a criminal act, and not fraud, as long as nobody is lied to. What makes a Subject-To deal ugly is not legality, it is concealment: a seller who did not understand that their name stays on the loan, or a buyer who stops making the payment.

The mechanism, what enforcement actually looks like, why a land trust does not solve it, and the three exits from a called loan are all in the due-on-sale guide. It is the objection worth being able to answer in one breath on a seller call.

Where the other two Structures come in

The Subject-To versus Seller Finance argument is only half the decision. Two other answers are often better, and the reason investors miss them is that they were already committed to a creative structure before they looked at the numbers.

Wholesale is the right call when the spread is real but you are not the right owner — the repairs are beyond you, the market is not yours, or the seller needs to close in eleven days. You assign the contract and take a fee, and that is a good outcome, not a consolation prize.

Cash Offer is the right call when the seller’s motivation is speed and certainty above price, and the discount they will accept for it beats what any carry structure earns you. A seller in probate who wants the house gone does not want to hear about a fifteen-year note.

The decision, as a sequence

On a real lead, in this order: What is it worth, and what do they owe? Low equity and a good rate points to Subject-To. High equity and a seller with no loan points to Seller Finance. Then: what does the seller actually need — monthly income, a lump sum, or out by Friday? Income supports a carry. A lump sum or a deadline pushes you toward Cash Offer or Wholesale. Then, and only then: do the terms service themselves out of the rent? A Structure the rent cannot cover is not a deal, however clever it is.

That sequence is exactly what Propwise runs. You enter the address, you answer the two things public data cannot tell us — what the seller owes or pays monthly, and why they are selling — and it names the Structure, the Runner-up, the terms it would offer, and the one thing it did not know that you should ask the seller about. Two Verdicts are free, and a Pass is $29 for 30 days.

If you already have the figures in front of you and would rather not start from an address, the creative finance deal calculator runs the same rules on numbers you type in, and shows the monthly cash flow and the cash-on-cash return alongside the Structure. It is free and it does not ask for an email.