Subject-to ("sub-to") is one of the most powerful — and most misunderstood — strategies in real estate investing. Instead of buying a property with cash or a new mortgage, you take over the seller's existing mortgage and keep making their monthly payments. The deed transfers to you; the loan stays in their name.

Done right, subject-to deals let you acquire properties with zero down and no bank involvement. Done wrong, they expose you and the seller to real legal risks.

What subject-to actually means

The property is sold "subject to" the existing mortgage remaining in place. The seller remains liable on the loan (their name stays on it). You take title via a deed and agree to make the monthly payments going forward.

If you stop paying, the bank forecloses on the seller, wrecking their credit. That's why subject-to requires trust and proper paperwork.

When subject-to beats wholesaling

  • Seller has little equity (wholesaling doesn't work with thin equity, sub-to does)
  • Seller is behind on payments and needs to transfer the problem quickly
  • Current mortgage has a low interest rate the new buyer wants to inherit
  • Seller wants out immediately and doesn't care about a big cash payout

When subject-to doesn't work

  • Seller has high equity (they'd rather cash out)
  • Mortgage has a strict due-on-sale clause the bank is actively enforcing
  • Property has major code violations or liens
  • Seller wants the mortgage off their name (most do eventually)

The due-on-sale clause risk

Most mortgages have a "due-on-sale" clause: if the title transfers, the lender can call the entire loan balance due. In practice, lenders rarely exercise this clause as long as payments continue on time — they'd rather keep getting paid than foreclose.

But the risk exists. Responsible sub-to operators:

  • Use a land trust to obscure the transfer from the lender
  • Always pay on time (the one guaranteed trigger for enforcement)
  • Disclose the risk to sellers in writing
  • Have exit-plan language in the contract (refi within X years)

How the deal typically structures

  1. Seller signs a purchase contract at the sale price (often current market value)
  2. Seller signs a limited power of attorney authorizing you to handle the mortgage
  3. Seller signs a warranty deed transferring title to you (or your LLC / land trust)
  4. You set up ACH payments from your bank account to the seller's mortgage
  5. You start making payments; seller retains no further responsibility except the loan in their name
  6. Closing happens through a title company (yes, even sub-to uses title)

Typical sub-to deal math

  • Current property value: $280K
  • Seller's mortgage balance: $265K (low equity)
  • Seller's equity: $15K
  • Wholesaler/buyer pays seller: $5,000 (moving money)
  • Wholesaler takes title, continues $1,800/mo payments on the existing loan
  • Rents property for $2,400/mo → $600/mo cash flow

For wholesalers: you can assign the sub-to contract to an end-buyer for a fee (usually $3K–$10K).

Ethical considerations

Sub-to is a trust-based transaction. You're taking on an obligation that stays in the seller's name. If you fail, they suffer.

  • Disclose everything. Seller must fully understand the structure.
  • Recommend they consult an attorney. Real ones, not yours.
  • Always pay on time. Their credit depends on you.
  • Have a refi plan. Ideally the loan gets refinanced into your name within 3–5 years.
  • Have reserves. If a tenant stops paying, you still owe the mortgage.

Wholesaling vs buying subject-to

Wholesalers who do sub-to typically flip the contract, not hold the property. The assignment fee is smaller ($3K–$10K vs $10K–$20K for traditional wholesales) but the sellers you can help expands dramatically — low-equity deals that couldn't wholesale are very much sub-to deals.

Many experienced wholesalers offer sub-to as an alternative when cash wholesaling math doesn't work. It's a way to save deals that would otherwise die.

Legal considerations by state

  • All states allow sub-to transactions in principle
  • Texas has strict disclosure requirements after the 2005 legislation
  • California has complex equity-skimming rules that intersect with sub-to
  • Florida regulates sub-to loosely but requires proper deed recording

Always use an attorney-reviewed contract template for your state.

Bottom line

Subject-to is a legitimate, powerful strategy for deals that don't fit traditional wholesaling. The trust and paperwork requirements are higher, but so are the opportunities. For wholesalers expanding their toolkit, sub-to is essential.

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