"Seller Financing vs. a Traditional Mortgage: What Should I Compare Before I Sign?"

Ask for the promissory note and the security instrument in writing before you agree to price, then price the same purchase as an ordinary mortgage and set the two side by side. Four things decide a seller-financed purchase: the payment schedule, whether the seller's own mortgage can be called, where your payments are recorded, and what it takes to refinance out of it later.

I'm Jeff Moran, a mortgage broker in Bluffton, South Carolina, originating since 1996, NMLS #483943, through C2 Financial Corporation, licensed in fifteen states. Seller financing gets described as the simple option, and the first conversation usually is. The paperwork it produces is the same paperwork a mortgage produces, held by a person instead of a company, and that person will not hand you a Loan Estimate to check it against.

What is seller financing, exactly?

The seller sells you the home and lends you part or all of the price. You pay them instead of a bank. It comes in three shapes, and which one you are being offered changes almost everything downstream.

Shape	Who holds title after closing	What you sign	Where it usually shows up
Note and mortgage or deed of trust	You	A promissory note plus a recorded security instrument	A seller who owns the property free and clear
Installment land contract or contract for deed	The seller, until you finish paying	One contract covering both the sale and the payments	Rural sales, family sales, older properties
Seller-carried second	You	An ordinary first mortgage, plus a note and junior lien to the seller	A price gap the down payment does not close

The first two replace the mortgage. The third comes behind one, and the agencies have written rules about it that a private party still has to satisfy.

Notice what the middle row costs you. Under a contract for deed you are paying toward ownership rather than owning, and the record of the sale may not be at the courthouse at all until the balance is gone. That is the shape that most often surprises people two years in.

What has to be in the paperwork before I sign?

Four documents, and the sale is only as good as the weakest one.

The purchase contract. Same as any purchase. Price, condition, inspection rights, closing date.

The promissory note. The debt itself. Amount, rate, payment, how long payments run, whether there is a lump sum at the end, what happens if a payment is late, whether you can pay it off early without a penalty.

The security instrument. The mortgage or deed of trust that ties the debt to the property, recorded in the county. This is the document that makes the note a mortgage rather than an IOU.

The title work. A search that shows what the seller actually owns and what is already recorded against it, and an owner's policy insuring what you receive. Who pays for the owner's title insurance is negotiable; whether the search happens should not be.

That standard is not something I invented for private sellers. Fannie Mae's Selling Guide, in B2-1.2-04, revised 08/06/2025, sets three requirements for a subordinate lien on a financed property. It has to be evidenced by a promissory note. It has to be reflected in a recorded mortgage, deed of trust or other security document. And it has to be clearly subordinate to the first mortgage. Written, recorded, and clear about its position. A seller who balks at any of the three is not offering you a simpler sale. They are offering you a thinner one.

Why does a seller's note so often end in a balloon?

Because of where federal rules draw the line around people who lend on their own home.

Regulation Z carries two narrow carve-outs for sellers who finance their own property, at 12 CFR 1026.36(a)(4) and (a)(5). The three-property version, at (a)(4), covers a seller financing three or fewer properties they own in any twelve-month period, who did not build the home in the ordinary course of business, and whose financing is fully amortizing. The one-property version, at (a)(5), covers a natural person, estate or trust financing a single property in twelve months. The repayment schedule cannot produce negative amortization. The rate has to be fixed, or not adjustable for at least five years, with reasonable annual and lifetime limits on increases.

Read those two side by side and the shape of your offer starts explaining itself. A seller working inside the three-property carve-out cannot hand you a balloon, because fully amortizing means the payments retire the debt. A seller working inside the one-property carve-out can, because that one only forbids the balance from growing.

So a balloon is not automatically a warning. It is a fact about which lane the seller's attorney thinks the sale is in, and it is the fact you have to plan around, because the balloon is a date on which you will need a lender. Which side of those lines a particular sale falls on is a question for the seller's attorney and yours. Your job is narrower: read the note, find the date, and count backwards from it.

Does the seller still owe money on the property?

Ask early, and ask for the answer in writing. If the seller has a mortgage, their loan almost certainly contains a due-on-sale clause, and selling the property is what that clause is written about.

The federal statute that governs those clauses, 12 U.S.C. § 1701j-3, lets a lender enforce due-on-sale on residential property of fewer than five dwelling units, and then lists the transfers it may not enforce against. That list is about deaths, divorces, inheritances, transfers into a living trust, junior liens that do not move occupancy, and short leases without a purchase option. A sale to a buyer who moves in is not on it.

Two practical consequences. If the seller's existing mortgage is being paid off at your closing, this stops being your problem, and the payoff statement is the proof. If it is staying in place while you make payments to the seller who makes payments to their lender, then a loan you are not on and cannot see can be accelerated by a lender you have no relationship with. That is a risk you can accept with your eyes open. It is not a risk to discover from a letter.

Where do my payments go, and who can prove I made them?

Whoever collects the money, the answer to "who can prove it" needs to be a third party, from the first payment forward.

A servicing company, an escrow agent or a bank set up for the purpose will take the payment, apply it, and produce a statement. A seller depositing your checks will produce nothing, and a canceled check is a record that you paid something rather than a record of what it was applied to. The same question applies to the taxes and the insurance: a mortgage servicer usually escrows both and proves it. A private note may leave both to you, which means a lapsed policy or a delinquent tax bill is on your side of the table.

What does it take to refinance out of it later?

Buyers are rarely walked through this, and it decides whether the arrangement was a bridge or a trap. The exit is documented, and the documentation starts on the day you sign.

For a land contract or contract for deed, Freddie Mac's Seller/Servicer Guide sets four conditions in Section 4301.4, revised 02/04/2026, before a "no cash-out" refinance may pay off the balance: the file must contain a copy of the executed contract; the contract must have been executed at least twelve months before the application received date; the file must contain third-party documentation of the payments for the most recent twelve-month period; and the loan-to-value ratio is calculated on the current appraised value. Fannie Mae draws the same twelve-month line in B2-1.3-02, revised 10/08/2025, which permits a limited cash-out refinance to pay off an installment land contract executed more than twelve months before the date of the loan application.

Inside twelve months the transaction is treated differently. Fannie's B2-1.3-01, revised 11/05/2025, lists paying off the outstanding balance on an installment land contract or contract for deed among the permitted uses of purchase money proceeds. There is a path either way. The two paths carry different terms, and the calendar decides which one you are on.

For a seller-carried second, the question is what the money was used for. B2-1.2-04 sorts it plainly: paying off a purchase money second with no cash out is underwritten as a limited cash-out refinance, while paying off a second that was not purchase money is a cash-out refinance regardless. B2-1.3-02 adds the proof required, which is documentation that the entire amount of the subordinate financing was used to acquire the property. Freddie's Section 4301.4 says the same in its own words: a junior lien may be paid off in a no cash-out refinance only if all of it went to purchasing the property. The file has to show that. What a purchase, a refinance and a cash-out each mean covers why that label changes the terms.

Every one of those requirements is satisfied by paperwork that either exists from day one or does not exist at all. Third-party payment records for twelve months cannot be reconstructed in month eleven.

If the seller is carrying a second behind a real mortgage

Different shape, different rules, and these ones bind at your closing rather than years later.

Freddie Mac's Section 4204.1, revised 03/05/2025, sets the terms for new secondary financing recorded alongside a first mortgage: the maturity date must be at least five years after the note date unless the financing is fully amortizing or a line of credit, it must carry no call provision exercisable within the first five years, and the scheduled payments must cover at least the interest accruing each month. Fannie's B2-1.2-04 lists the mirror image as unacceptable, naming negative amortization and financing that does not fully amortize where the balloon date falls less than five years after the note date of the new first mortgage.

A seller who offers to carry a piece on a two-year balloon is offering something that will not fit behind a conforming first mortgage on those terms. Better to find that out while the price is still being negotiated than at the closing table. The payment on that second also counts in your ratios, which is what debt-to-income measures and what the Debt Ratio tool is for.

An illustration, with invented numbers

Numbers below are made up to show the mechanism.

A seller offers to carry the whole purchase, interest only, with the balance due at month sixty.

Purchase price                    $420,000
Down payment                     − $42,000
                                 ─────────
Seller-carried note               $378,000

Principal paid over 60 months            $0   (interest-only schedule)
                                 ─────────
Balance due at month 60           $378,000

Five years of on-time payments, and the amount owed on the last day is the amount owed on the first. That is not a defect in the offer. It is what interest-only means, and it makes the refinance a requirement rather than an option. The same purchase financed conventionally would have applied something to principal every month, which is a real difference worth pricing rather than assuming.

Mistakes that show up over and over

The handshake note. Terms agreed by text, papered later, recorded never. Nothing else on this page can save a sale that skipped the security instrument.

Waiting on the refinance. Treating "I'll just refinance in a year" as a plan, without knowing that a twelve-month payment history from a third party is part of what makes that possible.

Buying the price and ignoring the schedule. A discount on the price with a balloon eighteen months out is a different purchase than the same price on a thirty-year schedule.

Skipping the lien search. The seller's mortgage, a tax lien or a judgment recorded before your instrument is ahead of you, and finding it later does not move it.

Never comparing. Get a real number for the same property financed conventionally. Comparing an offer against nothing is not comparing. The rate options for your own scenario are visible without an application, and how to read two Loan Estimates against each other covers what to do once you have one.

Common questions

Is seller financing legal?

Yes, and it is ordinary in family sales and rural sales. It is regulated rather than prohibited. Federal rules set out when a seller financing their own property counts as a loan originator. There are two narrow exceptions, at 12 CFR 1026.36(a)(4) and (a)(5), for sellers financing three properties or one property in a twelve-month period. Which side of those lines a specific sale falls on is a question for the attorneys involved, and every seller-financed sale should have one on each side.

Can I get a traditional mortgage on a home the seller offered to finance?

That is a separate question from whether the seller offered. A seller who prefers to carry the note may still sell to a buyer bringing an ordinary mortgage, and it is worth asking directly, because the answer tells you whether the financing is a preference or a condition. Pricing both is how the comparison gets real numbers instead of impressions.

Does a seller-financed payment history help me later?

Only if somebody other than the seller can document it. Both agency guides ask for third-party evidence of the payments before a refinance pays off a land contract. So a servicing arrangement set up at closing does double duty. It proves the payments as you make them, and it satisfies the file when you want out.

What happens if the seller dies before the note is paid?

The note and the security instrument are assets of the estate, and the estate collects. That is another reason the paperwork matters more here than in an ordinary purchase, and why recording the instrument is not optional. Whether a contract for deed behaves the same way varies by state, which is a question for a local attorney rather than a national article.

How much down payment does seller financing usually take?

Whatever the seller and the buyer agree on, because there is no program setting it. That freedom cuts both ways: a low figure can look generous while the note carries the cost somewhere else, and a high figure can be the reason the terms are reasonable. Read the note and the down payment together, never separately. Closing costs still exist on a private sale, and what counts as reserves is worth knowing before the cash is committed.