60-Second Answer: How a Subject-To Deal Works

1. The seller conveys title to the buyer while the seller’s existing mortgage stays in place on the property.
2. The buyer takes the property “subject to” that mortgage. The buyer makes the payments but is not on the loan.
3. The seller remains personally liable on the note. If the buyer stops paying, the lender pursues the seller, not the buyer.
4. Almost every mortgage has a “due on sale” clause that lets the lender call the loan due when title transfers. Sub-to deals carry that risk whether the lender notices or not.
5. Structure matters more than the idea. The paperwork determines whether this protects both sides or destroys both of them.

Why Would Anyone Do This?

Seller Reasons

• Can’t sell conventionally. Property is underwater, title is messy, or market conditions made a standard sale impractical.
• Needs to move fast. Job relocation, divorce, inheritance of unwanted property, health event.
• Wants continued mortgage payment history. Some sellers use sub-to to keep the loan current during hardship rather than defaulting.
• Has equity but no cash buyer at market. Sub-to buyer makes up the gap with terms.

Buyer Reasons

• Below-market interest rate. A seller’s 2020-era mortgage at 3% is worth real money in a 6.5% environment.
• Low capital entry. Sub-to typically requires only enough cash to catch up arrears and cover closing. No conventional down payment.
• No qualification. The buyer never touches the lender’s underwriting.
• Speed. Closing can happen in days, not weeks.

The Due-on-Sale Clause: The Real Risk

Almost every conventional mortgage signed in the last 40 years contains a due-on-sale clause. The clause allows the lender to call the entire loan balance due when the borrower transfers title. Federal law, specifically the Garn-St Germain Depository Institutions Act (12 U.S.C. § 1701j-3), preempts state law and authorizes lenders to enforce these clauses with limited exceptions.

Sub-to transfers are not on the exempt list. A lender that finds out can call the loan. In practice, most lenders don’t bother as long as the loan stays current, but “most lenders don’t bother” is not a legal defense. The risk is real and should be papered.

The Exempt Transfers (Garn-St Germain)

Garn-St Germain exempts certain transfers from due-on-sale enforcement on one-to-four-family residential mortgages. The exempt list includes:

• Transfer to a relative upon death of the borrower
• Transfer to a spouse or child
• Transfer to an inter vivos trust where the borrower remains the beneficiary
• Transfer resulting from divorce or separation
• Certain leasehold transfers under three years with no option to purchase

Savvy sub-to structures sometimes route title through a revocable trust with the seller as beneficiary to try to piggyback on the inter vivos trust exemption. This is aggressive and the legal analysis is not settled. It reduces detection risk; it does not eliminate the underlying due-on-sale exposure.

What Goes Wrong When Sub-To Is Handled Poorly

What Can Go Wrong	Typical Exposure
Buyer stops paying; lender pursues seller for full balance	Full remaining mortgage balance plus fees
Lender accelerates under due-on-sale; buyer must refinance or lose property	Forced refinance at current rates, or foreclosure
No insurance assignment; buyer pays for coverage that names only seller	Claim denied, out-of-pocket repairs
Seller files bankruptcy; sub-to property pulled into estate	Trustee can unwind the transfer in certain cases
No tax responsibility allocation; seller gets 1098 and IRS issue	Seller loses mortgage interest deduction battle
No clear performance standard; buyer makes late payments damaging seller’s credit	50-150 point credit score drop on seller
Structured properly with full paperwork from the start	See /creative-financing/subject-to/ for pricing

The Paperwork a Real Sub-To Deal Needs

A sub-to transaction that actually protects both parties requires more paperwork than a conventional closing, not less. Here’s the short list:

1. Purchase contract with sub-to-specific language, not a generic Multiboard.
2. Warranty deed or quitclaim deed recording the transfer.
3. Sub-to rider or disclosure acknowledging the existing mortgage stays in place.
4. Authorization to release information so the buyer can communicate with the lender and receive statements.
5. Payment authorization or ACH from buyer to the mortgage servicer.
6. Insurance transfer naming the new owner and the existing lender as loss payee.
7. Tax responsibility agreement documenting who pays what and how deductions flow.
8. Power of attorney from seller to buyer for limited loan-related communications.
9. Performance guarantee and remedies if the buyer fails to pay.
10. Seller protection rider including reinstatement rights, quitclaim-back on default, and first position on any resale.
11. Buyer protection rider including confirmation of payment history and mortgage status.
12. Notice to lender if the deal structure contemplates disclosure.

Sub-To and Wholesaling: Different Things

These get confused. They are not the same.

Sub-to is a buyer acquisition technique. The investor takes title and makes payments.

Wholesaling is a contract assignment technique. The wholesaler locks up a contract, then assigns or doubles the closing to an end buyer for a fee. The wholesaler never owns the property.

Some investors combine: lock up a sub-to deal, then wholesale the buyer side to another investor who takes the sub-to position. If that’s your structure, the paperwork gets more complex and you need both contract-side counsel and title-side counsel. See my Illinois wholesaling post for the 2026 legal landscape.

What a Seller Should Insist On

If you’re the seller in a sub-to deal, you’re still on the hook for the mortgage. You need these protections in writing:

• First-position reinstatement right. If the buyer defaults, you (or your designee) can cure the default and take title back.
• Quitclaim deed held in escrow. Triggered by default, records title back to you without litigation.
• Proof of payment monthly. Copy of every mortgage statement and payment confirmation.
• Buyer-paid insurance with you as additional insured. If the property burns down, your lender gets paid.
• Resale consent. Buyer cannot resell, refinance, or further assign without your consent while the loan is in your name.
• Acceleration on material breach. Pattern of late payments triggers your right to take the property back.

What a Buyer Should Insist On

• Current mortgage statement and loan history. Confirm the loan is actually current.
• Copy of the note and mortgage. Know what clauses you’re inheriting.
• Title commitment. Make sure there are no undisclosed liens.
• Seller’s full disclosure on property condition. Same as any other sale.
• Seller warranty of no pending bankruptcy or judgment. Pending bankruptcy can unwind your transfer.
• Cushion for arrears. Close with enough cash to bring the loan current plus 2-3 months reserve.

Frequently Asked Questions

Is subject-to legal in Illinois?

Yes. Sub-to is a legitimate creative finance structure. The transaction is legal. The risk is the due-on-sale clause in the underlying mortgage, which gives the lender the right to accelerate the loan on transfer.

Will the lender always call the loan?

No. Most lenders don’t call the loan as long as payments stay current. Calling is expensive and creates servicing issues. But “most lenders don’t” is not a legal defense. The right to accelerate exists.

Does the seller stay on the mortgage?

Yes. Sub-to does not refinance or novate the loan. The seller remains personally liable. If the buyer stops paying, the lender pursues the seller.

How is this different from a wraparound (wrap) mortgage?

In a wrap, the buyer signs a new note with the seller that wraps around the existing loan. The seller continues to make payments on the original and collects payments from the buyer on the wrap. Sub-to is simpler: buyer takes title and just pays the existing loan directly.

Does using a trust avoid the due-on-sale issue?

It reduces detection risk. Garn-St Germain exempts transfers to inter vivos trusts where the borrower is the beneficiary. Whether a trust used as a pass-through for sub-to qualifies is not fully settled. Some practitioners use this structure; the legal certainty is imperfect.

What if the buyer stops paying?

With proper paperwork, the seller’s quitclaim-back provision kicks in and title returns to the seller. Without it, the seller has to sue for specific performance or take the credit hit while the lender forecloses.

Can I sub-to a property with an FHA or VA loan?

Both FHA and VA loans are assumable in certain conditions, which is different from sub-to. Sub-to on government-backed loans carries higher scrutiny and different risks. Talk to an attorney before structuring.

How much does attorney help cost on a sub-to deal?

Pricing is on my dedicated sub-to service page. The fee depends on whether you’re on the buy side or sell side, and the complexity of the deal. The consult call is free.