What the Clause Says
A **due-on-sale clause** (sometimes called a due-on-transfer clause) is standard language buried in nearly every Texas deed of trust. The wording varies slightly by lender, but the essence is always the same: *if the borrower transfers any interest in the property without the lender's prior written consent, the lender may declare the entire loan balance immediately due and payable.*
It's an option, not an automatic event. The transfer doesn't void the loan or cancel the deed. The lender simply gains the right to demand full payoff.
The Federal Law Behind It: Garn-St. Germain
Before 1982, courts in many states (including Texas) were inconsistent about whether due-on-sale clauses were enforceable. Congress settled the question with the **Garn-St. Germain Depository Institutions Act of 1982** (12 U.S.C. § 1701j-3). The statute makes due-on-sale clauses federally enforceable on most residential mortgages.
Garn-St. Germain also created **statutory exceptions** — specific transfers where the lender is prohibited from triggering the clause: transfers to a spouse or child, transfers resulting from divorce or death, transfers into a revocable living trust where the borrower remains a beneficiary, and a few others. None of those exceptions cover a typical subject-to sale to an unrelated buyer.
When Lenders Actually Call the Loan
In practice, due-on-sale enforcement is rare on performing loans. Lenders are in the business of receiving payments — calling a loan that's current means they get a payoff (good) but lose the income stream of an above-market rate (bad, in a higher-rate environment). Most servicers leave performing loans alone.
Triggers that increase enforcement risk: a new hazard insurance policy in the buyer's name (most common detection method), the buyer changing the mailing address, late payments that prompt the lender to look at the file, or the loan being sold to a new servicer that re-underwrites.
Triggers that *decrease* enforcement risk: keeping insurance in the seller's name with the buyer as additional insured, mail forwarding rather than address changes, using a third-party servicer that posts payments from the seller's name, and (most important) **never being late**.
What Happens If a Lender DOES Call the Loan
The lender sends written notice demanding full payoff, typically within 30–60 days. The loan is not automatically in default — the borrower (seller) and occupant (buyer) have time to respond.
Options: refinance the property into the buyer's name (cures the issue), sell the property at retail (pays off the loan), bring in private money or hard money short-term to pay off the lender, or negotiate with the lender (some will reinstate the original loan in exchange for an assumption fee and rate adjustment).
Reputable subject-to investors build due-on-sale reserves into deals — both seller and buyer should know the contingency plan before closing, not after a notice arrives.
How This Affects Sellers Considering Subject-To
The clause is a real risk but a manageable one. The honest disclosure: *the lender has the contractual right to call the loan, and federal law backs that right; in current market conditions, enforcement is uncommon on performing loans, but it can happen.*
Mitigations a Texas seller should require: (1) a written exit plan if the loan is called, (2) buyer maintains a reserve fund to refi or sell on short notice, (3) a third-party servicer so the seller can verify on-time payments monthly, and (4) the seller retains a performance mortgage allowing them to take the property back if the buyer defaults.