With mortgage rates above 7%, a seller's 3% mortgage can be worth more than a kitchen remodel. That's why more buyers are asking about two ways to take over an existing loan: assuming the mortgage and buying "subject to" the mortgage. They sound similar, but they work very differently — and the difference determines who is legally responsible for the debt, whether the lender has to approve, and how much risk each side takes on.
Quick Answer
In a loan assumption, the buyer formally takes over the seller's mortgage with the lender's approval. The buyer becomes legally responsible for the loan, and the seller can be released from liability. FHA, VA, and USDA loans are generally assumable; most conventional loans are not.
In a subject-to purchase, the buyer takes title and makes the payments, but the loan stays in the seller's name and the lender isn't asked to approve. The seller remains legally liable, and the lender can call the full loan due under the mortgage's due-on-sale clause. Assumption is the lower-risk path; subject-to carries significant risk for the seller.
Subject-To vs. Loan Assumption: Side by Side
Loan Assumption | Subject-To | |
|---|---|---|
Lender approval | Required — the buyer applies and qualifies | Not requested |
Whose name is on the loan | The buyer's | Still the seller's |
Who is legally liable | The buyer; the seller can be released | The seller |
Who owns the home | The buyer | The buyer |
Due-on-sale risk | None — the lender agreed | Yes — the lender can demand full payoff |
Eligible loans | Mainly FHA, VA, and USDA | Any loan, in practice |
Buyer must qualify | Yes — credit, income, and debts | No lender qualification |
Effect on seller's credit | Loan leaves the seller's credit after release | Loan stays on the seller's credit; late payments hurt the seller |
Timeline | Often 45 to 90+ days for servicer approval | Can close quickly |
Overall risk | Low — a standard, lender-sanctioned process | High, especially for the seller |
How a Loan Assumption Works
In an assumption, the buyer steps into the seller's mortgage with the same interest rate, remaining balance, and remaining term. The lender, usually the loan servicer, reviews the buyer much like a new loan application: credit, income, debts, and assets.
Which Mortgages Are Assumable?
Loan Type | Assumable? |
|---|---|
FHA | Yes, with a creditworthiness review. The buyer generally must live in the home as a primary residence. Servicers can charge an assumption processing fee of up to $1,800. |
VA | Yes, and the buyer doesn't have to be a veteran. The buyer typically pays a 0.5% VA funding fee unless exempt. Important for sellers: unless the buyer is an eligible veteran who substitutes their own entitlement, the seller's VA entitlement stays tied to the loan. |
USDA | Generally yes, if the buyer meets USDA eligibility. Rarely relevant inside Chicago city limits. |
Conventional (Fannie Mae / Freddie Mac) | Usually not. Most conventional fixed-rate loans include an enforceable due-on-sale clause. |
The Catch: Covering the Equity Gap
The buyer takes over only the remaining loan balance. The difference between the purchase price and that balance — the seller's equity — has to be paid at closing, in cash or with a second loan. In neighborhoods where prices have risen a lot since the seller bought, that gap can be large.
Example: a $450,000 home with an FHA loan balance of $300,000 at 3.0% and 25 years remaining.
New Loan | Assume + Second Loan | |
|---|---|---|
Cash down | $90,000 (20%) | $90,000 |
Financing | $360,000 at 7.40% | $300,000 at 3.0% + $60,000 at 8.5% |
Monthly principal and interest | About $2,493 | About $1,884 |
Illustrative only. Excludes taxes, insurance, and mortgage insurance (FHA loans carry a mortgage insurance premium). Second-loan availability and rates vary, and not every servicer permits secondary financing on an assumption.
In this example, the assumption saves about $600 a month with the same cash down. That's the appeal — and why sellers with assumable low-rate loans should mention it in their marketing.
How a Subject-To Purchase Works
In a subject-to deal, the seller deeds the home to the buyer, and the buyer agrees to make the payments on the seller's existing mortgage. The lender isn't asked to approve the transfer, and the loan stays in the seller's name. Subject-to is most often used by investors and in situations where a seller needs to sell quickly — facing foreclosure, behind on payments, or owing close to what the home is worth.
The Due-on-Sale Clause
Most mortgages include a due-on-sale clause that lets the lender demand the full balance if the property is transferred without its consent. Federal law (the Garn–St Germain Act) makes these clauses enforceable, with limited exceptions such as transfers to a spouse or child, transfers after a death, and transfers into certain living trusts — a sale to an unrelated buyer is not one of them. Lenders don't always enforce the clause, especially while payments are current, but they can. If the lender calls the loan, the buyer must pay it off or refinance, and if that can't happen, the home can go into foreclosure — on the seller's record.
Risks for Sellers
- You remain liable for a home you no longer own. If the buyer stops paying, late payments and any foreclosure land on your credit.
- The loan still counts against you when you apply for your next mortgage, which can limit what you can buy.
- The lender can call the loan under the due-on-sale clause.
- Insurance and tax issues can arise if the policy and escrow aren't properly set up after the deed changes hands.
Risks for Buyers
- The loan can be called, forcing a refinance at today's rates or a sale.
- You depend on the seller's loan staying in good standing, including escrow for taxes and insurance you can't directly control.
- You're not building credit history from the payments, since the loan isn't in your name.
- Title insurance, homeowners insurance, and future refinancing can be more complicated.
An Illinois Warning About Distressed Properties
Subject-to deals are often pitched to homeowners who are behind on payments or facing foreclosure. Illinois' Mortgage Rescue Fraud Act regulates transactions involving "distressed property" — generally homes in foreclosure or more than 90 days delinquent on a mortgage — especially where the seller stays in the home or is promised the chance to buy it back. It imposes strict contract, disclosure, and cancellation requirements, and violations carry serious penalties. Anyone considering a subject-to transaction involving a distressed homeowner in Illinois should have an attorney review it first.
Which Option Makes Sense?
- Choose an assumption when the seller has an FHA, VA, or USDA loan, the buyer can qualify, and there's time for the servicer's approval. For most owner-occupant buyers and sellers, it's the right way to transfer a low-rate loan.
- Be very cautious with subject-to. It can solve a problem for a seller who needs to sell fast and has little equity, but it shifts risk onto the person who no longer owns the home. If you're a seller considering it, have an Illinois real estate attorney review the structure first, and ask what protections you'll have if payments stop.
- Consider alternatives. A traditional sale with a seller credit to buy down the buyer's rate, a temporary buydown, or seller financing can achieve similar goals with clearer protections.
How to Assume a Mortgage in Illinois: Step by Step
- Confirm the loan is assumable. Check the loan type and ask the servicer for its assumption requirements and fees.
- Calculate the equity gap and line up the cash or second-loan financing to cover it.
- Write the contract with an assumption contingency and a realistic closing timeline. In Chicago, your attorney will review it during attorney review.
- Submit the assumption application to the servicer with income, asset, and credit documentation.
- Get the release of liability for the seller in writing at closing, and for a VA loan, address substitution of entitlement.
- Close with title insurance and new homeowners insurance in the buyer's name.
Frequently Asked Questions
What is the difference between subject-to and assuming a mortgage?
In an assumption, the lender approves the buyer and the loan transfers into the buyer's name. In a subject-to purchase, the buyer takes the home and makes the payments, but the loan stays in the seller's name without the lender's approval, and the seller remains legally liable.
Is buying a house subject-to legal in Illinois?
Transferring title subject to an existing mortgage isn't illegal in itself, but it can violate the loan's due-on-sale clause, giving the lender the right to call the loan. Deals involving homeowners in foreclosure or seriously behind on payments may also fall under Illinois' Mortgage Rescue Fraud Act. Talk to an Illinois real estate attorney before proceeding.
Can I assume a conventional mortgage?
Usually not. Most conventional loans have enforceable due-on-sale clauses. FHA, VA, and USDA loans are the main assumable options.
Do you need good credit to assume a mortgage?
Yes. The servicer reviews your credit, income, and debts much like a new loan application, though the process usually skips some steps, such as a new appraisal in many cases.
Is the seller released from liability when a loan is assumed?
They can be, but it isn't automatic. Sellers should get a written release of liability from the lender at closing. Without one, the seller may remain secondarily liable for the loan.
How long does a mortgage assumption take?
Often 45 to 90 days or more, depending on the servicer. Build that into the contract's closing date and contingencies.
Have an Assumable Loan — or Want One?
The Camille Canales Group helps Chicago buyers and sellers evaluate assumable loans, structure offers around them, and coordinate with lenders and attorneys so the deal closes cleanly. If you're weighing your options, we're happy to talk it through.
This article is for general information and is not legal, tax, or financial advice. Loan program rules, fees, and servicer requirements change. Consult your lender and an Illinois real estate attorney before entering any assumption or subject-to transaction.
