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Existing-loan guide

What Is a Subject-To Mortgage Sale? Seller Risks Explained

Learn how a subject-to real-estate purchase works, why the existing loan usually stays in the seller’s name, and the payment, credit, insurance, and due-on-sale risks.

Updated July 18, 2026 · 9-minute read
Property financing documents and house keys

In a “subject-to” transaction, title transfers to the buyer while the existing mortgage generally remains in the seller’s name. The buyer agrees to make payments, but the original borrower usually remains legally responsible to the lender unless the lender formally approves an assumption and releases that borrower.

Subject to versus loan assumption

Subject to

The lender is not necessarily changing the borrower. The seller’s loan remains in place and the buyer takes title subject to that debt.

Loan assumption

The lender reviews and approves the new borrower under its process. A release of the original borrower should never be assumed without written confirmation.

Why sellers consider it

Major risks for the seller

Protections to discuss with independent counsel

  1. Third-party servicing and automatic payment records.
  2. Immediate notice of late or missed payments.
  3. Insurance verification and annual renewals.
  4. Written default, cure, and transfer restrictions.
  5. Reserve accounts or other financial safeguards.
  6. A clear exit plan and deadline for refinancing or payoff.

This guide is for general educational purposes only and is not legal, tax, lending, or financial advice. Real-estate laws and transaction requirements vary. Consult qualified local professionals before signing an agreement.

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