If you are buying a San Diego home with an assumable first mortgage and the seller also has a second loan, start with the purchase price, the first mortgage balance you would assume and the written plan for clearing the seller’s second lien. Those three figures explain where your purchase money goes.
In a transaction where the seller’s second loan is paid from the sale proceeds, that payoff reduces the seller’s proceeds. Adding it again to the difference between the price and the assumed first mortgage would count the same dollars twice. The actual loan documents, title requirements and settlement figures must support the proposed closing.
Identify the existing second loan
A home equity loan or home equity line of credit can be secured by a second lien on the property. The CFPB explains that these loans use the home as collateral and generally stand behind the first mortgage in repayment priority. CFPB: second mortgages and junior liens.
Approval to assume the first mortgage addresses that loan. Obtain a separate written answer about the existing second loan: will it be paid and its lien released at closing, or is another arrangement proposed? Ask the assumption servicer and the title and escrow professionals to review that arrangement before you budget around it.
I would want to see which obligation is actually on title, who holds it and the requirements for closing. An old account balance or a verbal estimate is a starting point; the transaction needs current documents.
Follow the money in a purchase example
Here is a hypothetical purchase with a seller’s existing second loan paid from the proceeds. These are simplified figures, before closing costs, credits, prorations and payoff adjustments.
| Item | Amount |
|---|---|
| Agreed purchase price | $750,000 |
| First mortgage balance the buyer assumes | $500,000 |
| Remaining purchase funds to supply | $250,000 |
| Seller’s second-loan payoff from those funds | $75,000 |
| Amount remaining for the seller before other costs | $175,000 |
The buyer supplies $250,000 toward the purchase, alongside assuming the $500,000 first mortgage. In this example, $75,000 of the $250,000 pays the second lender, leaving $175,000 for the seller before other costs. The purchase consideration totals $750,000.
If you added the $75,000 payoff to the $250,000 purchase funding gap, you would budget $325,000 for that gap. That would double-count the payoff under this stated arrangement. Your actual cash to close will also reflect how you fund the gap, your deposit, permitted credits and transaction costs.
Confirm the payoff and lien release
Title and settlement work includes identifying debts affecting the property, obtaining lender payoff information and arranging the required releases. ALTA’s residential closing workflow specifically includes obtaining payoff information directly from the mortgage holder. ALTA: residential title and closing process.
For the seller’s second loan, ask the closing team to confirm:
- The current payoff demand and the date through which it applies.
- How the payoff is funded and shown on the settlement statement.
- The documents and instructions needed to release the lien.
- For a HELOC, the steps required to close the credit line as well as resolve its lien.
Keep the first mortgage’s assumption requirements alongside that plan. The seller, buyer, servicer and closing professionals need figures and documents that agree.
Separate existing debt from your new financing
You may also need a new loan to fund some of the purchase gap. That adds a separate borrowing decision: its payment, rate, costs, lien position and approval requirements must fit the assumption.
For VA assumptions involving new secondary borrowing, VA directs the holder to protect the VA loan’s first-lien position and document the secondary lender, amount and repayment terms. Permission under program rules still requires the actual transaction to be processed correctly. VA Circular 26-24-17.
Our guide to financing an assumable purchase with a second loan covers that buyer-financing question. Here, the first task is accounting for and resolving a second lien the seller already has.
Put the closing plan together before you commit
Ask for one purchase-funding breakdown showing the price, the assumed first mortgage, the seller’s second-loan treatment, your funding source and the transaction costs. Compare it with the actual lender and settlement documents as they become available. The CFPB’s Closing Disclosure explainer is useful for reviewing the figures on that form when it applies to your financing.
If the proposed payoff consumes more than the seller’s available proceeds, the closing plan needs another documented source of funds or a different agreed arrangement. If someone proposes keeping the second lien in place, obtain the required lender and title answers before relying on that proposal.
A low first-mortgage rate is most useful when the complete purchase works for your budget. I would compare the funding requirement and monthly cost with a conventional purchase alternative, using the actual terms available to you.
Questions buyers ask
Does the seller’s second loan increase the agreed purchase price?
In the example above, the $75,000 payoff is paid from the $750,000 purchase consideration. It reduces the seller’s proceeds. The contract, payoff instructions and settlement figures determine your actual transaction.
Can I assume the seller’s second loan too?
That requires separate review of that loan and the proposed transfer. Do not rely on the first lender’s assumption approval as approval of the second loan. Obtain the applicable lender and title requirements in writing.
What should I check before making an offer?
Identify the loans affecting the property, confirm which first mortgage may be assumed and establish how the seller’s existing second lien will be handled. Then calculate your purchase funding and costs from that specific plan.




















