Seller Financing With an Existing Mortgage: 4 Ways It Works

You want to offer seller financing, but you still owe the bank on the house. That’s one of the most common questions I get from sellers, and the real answer is “yes, but.” The “but” is your mortgage’s due-on-sale clause, and it decides which version of seller financing you can do safely.

Short answer: Yes, you can do seller financing with an existing mortgage, but most mortgages let the lender demand full payment when you sell. The safe paths are paying the loan off at closing or a formal, lender-approved assumption. Wraparounds and subject-to deals keep the loan on your credit and can be called due at any time.

Can you do seller financing with a mortgage still on the house?

You can. Nothing stops you from signing a seller financing deal. The problem is the contract you already signed with your lender.

Almost every home loan has a due-on-sale clause. It says that if you sell or transfer the property, or any interest in it, without the lender’s written consent, the lender can demand the whole balance. Federal law makes that clause enforceable in every state under the Garn-St Germain Act, 12 U.S.C. § 1701j-3.

The same law lists transfers a lender can’t use as a reason to call the loan: a transfer to your spouse or kids, a divorce, a transfer into a living trust you stay in, a relative inheriting it, and a few others. A sale to an unrelated buyer isn’t on that list. Neither is a lease with an option to buy, or a lease longer than three years. And the protection for junior liens only covers liens that don’t hand over the right to live there, so carrying a second note for a buyer who moves in doesn’t qualify. The federal rule that applies it, 12 CFR § 191.5, even calls out liens created under a contract for deed.

Here’s a local example. Conventional loans on Idaho homes that use Fannie Mae and Freddie Mac’s standard forms are written on their Idaho deed of trust, Form 3013, Section 19. It counts a “bond for deed, contract for deed, installment sales contract, or escrow agreement” as a transfer. So calling it something else doesn’t get around the clause. Check your own deed of trust or mortgage for the same section.

The 4 ways to do owner financing with an existing mortgage

Every version of owner financing with an existing mortgage comes down to one question: what happens to your loan? There are four answers.

1. Pay off your loan at closing, then carry the rest

This is the cleanest one. The buyer’s down payment pays off your mortgage and your closing costs, title clears, and your note becomes the first lien on the house. The bank is out of the picture, so there’s no due-on-sale problem.

The catch is cash. The down payment has to cover your payoff plus your selling costs. If you owe a lot, that’s a big check. A buyer can also bring a bank loan for part of the price, with you carrying a smaller second note, but then you’re in second place behind their lender.

2. Let the buyer formally assume your loan

Some loans are assumable, mostly government-backed loans. With VA loans, federal law says that if you notify the lender in writing before the transfer, the loan is current, and the buyer qualifies and takes over the obligation, the assumption gets approved and you can be released from liability (38 U.S.C. § 3714). Your servicer can tell you if your loan is assumable and what it takes.

Then you can carry a note for the gap between your loan balance and the price, if the lender allows it. A low rate is worth real money to a buyer, which can help you on price. Just make sure you get the written release. An assumption without one can leave you on the hook.

Most loans aren’t assumable, though. That’s where the next two come in, and that’s where the risk lives.

3. A wraparound mortgage

With a wrap-around mortgage, you sell the house and carry one big note for the buyer that “wraps” your existing loan. The buyer pays you. You keep paying your lender. You keep the difference.

Your loan never gets paid off, and the lender usually never approves it. If the lender finds out and calls the loan, you owe the full balance now, even if your buyer is paying you on time.

4. Subject-to: the buyer takes over your payments

In a subject-to deal, the deed goes to the buyer and they make your mortgage payments, but the loan stays in your name. You’ve given up the house and kept the debt. If they stop paying, it’s your credit that takes the hit.

Here’s how the four compare:

Worked example: a $300,000 house with $180,000 left on the loan

Say you’re selling for $300,000. You owe $180,000 at 3.5% with 22 years left, so your payment is about $978.62 a month in principal and interest. I plan on 9% in selling costs on any sale, not 6%, so that’s $27,000.

Sell it and pay it off. $300,000 minus $27,000 minus your $180,000 payoff leaves you $93,000 at closing. Done. No risk after the closing table.

Carry a clean first-position note. To pay off the bank and your costs at closing, the buyer’s down payment has to be $207,000. Then you carry the other $93,000. Most buyers who need seller financing don’t have $207,000, which is why sellers end up looking at a wrap.

Do a wrap. The buyer puts $30,000 down. You carry a $270,000 wrap note at 7%, amortized over 30 years with a balloon at year five. Here’s how it plays out:

On paper, the wrap brings in about $155,914 over five years versus $93,000 today. That’s why people like them.

Now look at what you’re carrying for that extra money. Your $180,000 loan stays on your credit for five years. If the buyer is late, you still owe the bank $978.62 that month. If the lender calls the loan, you owe about $180,000 right away, and the house belongs to someone else. And if the buyer can’t refinance at the balloon, the $103,852 doesn’t show up on time. Those numbers don’t include taxes and insurance, either. You’ll want those escrowed so they don’t lapse.

The risks that come with keeping your loan in place

Every seller carry has the basic risks, like a buyer who quits paying (here’s why seller carry back loans can be dangerous for sellers). Keeping your loan in place adds these on top.

The lender can call the loan

That’s the due-on-sale clause. In my experience, lenders don’t go looking very often while the payments come in on time. But that’s my experience, not a promise, and it isn’t a plan. If rates are high and your loan is cheap, the lender has every reason to want it back.

Your credit is tied to someone else’s habits

On a wrap or a subject-to deal, a late payment from your buyer is a late payment on your credit report. That can matter the next time you want to buy, refinance, or qualify for anything.

You’ve sold the house, but you’re still the borrower

If something goes wrong, your way back is foreclosing on your buyer. Meanwhile, you’re still paying a mortgage on a house you don’t own. That’s a rough spot.

Tax surprises

When a buyer takes a house subject to your mortgage and the mortgage is more than your basis, the IRS treats the excess as a payment you received in the year of sale, even if no cash changed hands (IRS Publication 537). Wraps have their own rules. Talk to your CPA before you sign anything.

How I’d set it up if you still owe on the house

If you still want to do seller financing with a mortgage on the house, here’s how I’d go about it.

Know your payoff first. Get a real payoff statement, fees included, and run the net math. If your payoff is close to the price, there’s not much room for anything else, and you could end up bringing cash to closing.

Ask whether your loan is assumable. A formal assumption with a written release beats any workaround.

Attorney first. An attorney should draft the note, the deed of trust, and the wrap or assumption agreement. I want it written as tightly as a bank would write it, including what happens when the buyer gets a set number of days behind.

Use a deed of trust, not a contract for deed. A contract for deed doesn’t dodge the due-on-sale clause, and it’s harder to manage. In Idaho, a recorded deed of trust gives you a clear path to foreclose by trustee’s sale under Idaho Code § 45-1505 if the buyer defaults.

Have a third party service it. A title or escrow company should collect the buyer’s payment and send your lender’s payment first. That way you know your loan gets paid every month.

Vet the buyer like a bank would. Credit, income, a background check, and real money down, with a deadline to provide it all in the seller financing addendum. If they can’t meet it, you walk.

Check the lending rules. Federal rules in 12 CFR § 1026.36(a)(4) and (a)(5) set limits on seller financers, like fixed rates or rates that can’t adjust for at least five years. Your attorney should confirm your terms fit.

When I’d tell you not to do it

If you aren’t hurting for cash, I wouldn’t put a wrap or subject-to deal on the table. I save those for sellers who are truly stuck: behind on payments, can’t sell at a price that pays off the loan, or have no better option. If you can sell and walk away clean, that’s usually the better deal.

If it’s a rental doing well, ask whether you need to sell at all. Some owners consider a lease with an option to buy instead, since it keeps the rent coming and you keep title. Just know it isn’t a due-on-sale workaround. A lease with a purchase option isn’t one of the protected transfers either, so the same attorney conversation applies. Run the numbers on keeping it with our rent vs sell calculator.

I’m a broker and property manager, not an attorney or CPA. Laws vary by state, so check yours.

FAQ

Can you do seller financing if you still have a mortgage?

Yes. The safe ways are paying your loan off at closing or a formal, lender-approved assumption. A wrap or subject-to deal keeps your loan in place, and your lender can call it due under the due-on-sale clause.

What happens if my lender finds out about the seller financing?

The lender can demand the full loan balance. If you can’t pay it or refinance, the lender can foreclose, even if your buyer never missed a payment.

Is a wraparound mortgage legal?

The bigger issue usually isn’t the law, it’s your loan contract. Transferring the house without your lender’s consent lets them call the loan. A wrap may also need to fit federal seller financing rules, so have an attorney draft it.

Can a buyer take over my mortgage?

Only formally if your loan is assumable and the lender approves the buyer. VA loans can be assumed by a qualified buyer, with a release of liability for you. Otherwise, a buyer “taking over payments” is a subject-to deal, and the loan stays on your credit.

How is seller financing with an existing mortgage taxed?

It depends on the structure. If the buyer takes the house subject to your mortgage and the mortgage is more than your basis, the excess counts as a payment in the year of sale. Ask your CPA before you sign.

Selling a house you still owe on?

We’ll run the net on every option side by side: a regular sale, a seller carry, and anything else that fits, so you can see which one leaves you the most with the least risk.

See what your house could net you →