By Frederick Blum, Broker/Owner of Blum Realty Group
A buyer finds a San Diego home with an attractive assumable rate, subtracts the mortgage balance from the price and thinks the cash budget is settled. That subtraction answers one important question: how much of the price the existing mortgage does not cover. It does not answer how much money the buyer needs to finish the purchase.
Closing costs, prepaid items, additional financing and the cash you want left afterward belong in the plan before the offer. As your broker, I want the purchase structured around a complete estimate—not a low rate followed by expensive surprises in escrow.
Separate the purchase into four cash categories
The price gap: the agreed price minus the current balance of the mortgage being assumed. That amount must be covered with cash and any permitted, approved additional financing. It is not a fee charged by the servicer.
Transaction charges: assumption processing, applicable program fees, title and escrow work, recording, inspections, association documents or transfer charges, and any separate loan’s permitted costs. Obtain an itemized estimate and confirm which party is responsible for each line under the contract and program rules.
Prepaid and prorated ownership expenses: insurance, taxes, interest or other adjustments and funds required for an escrow account. Some of these are money set aside for bills rather than a charge for a service. They still affect what you need at closing.
Money retained after closing: moving costs, immediate work, upcoming assessments and emergency savings. A transaction can technically close while leaving a buyer with too little room for ordinary homeownership. Your offer should reflect the reserves you intend to keep.
Ask how deposits and amounts already paid will appear in the final calculation. An earnest-money deposit is generally part of your purchase funds, not an additional purchase expense to count a second time. Our second-loan guide addresses financing part of the gap.
The advertised assumption fee is not the entire closing bill
FHA assumptions
The current HUD Handbook 4000.1 permits a reasonable and customary assumption processing fee up to $1,800. Its servicing guidance also addresses actual third-party charges such as credit and employment-verification costs. Confirm the processor’s itemization rather than assuming the maximum is a flat charge in every transaction.
Also ask about the existing loan’s mortgage-insurance charge and any subordinate obligation or partial claim that must be resolved when ownership changes. A mortgage statement alone may not reveal every amount affecting the seller’s net proceeds or closing plan. Escrow, title and the servicer should reconcile those obligations early.
VA assumptions
VA’s assumption guidance provides a funding fee of 0.5% of the assumed balance unless the assumer qualifies for an exemption. On a $500,000 assumed balance, that is $2,500. The assumption funding fee is collected at closing; do not add it to the existing mortgage balance as if this were a new purchase loan.
Processing fees and permitted charges are separate. VA’s fee update and assumption locality variance govern applicable charges. The locality schedule lists California in the West region with a $463 variance that may be charged when an assumption closes, in addition to the applicable base fee and other allowable items. Have the servicer identify the authority for its actual charges; these figures are not a complete escrow quote.
The practical task is to reconcile the assumption department’s estimate with escrow’s estimate and any second lender’s estimate. A fee can be described differently across documents. Ask whether a line is additional, already included elsewhere or payable by another party.
Work backward from the cash you want left
Consider an illustrative $740,000 purchase with a $520,000 assumable mortgage. The price gap is $220,000. If a separately approved $140,000 second loan covers part of that amount, $80,000 of buyer cash goes toward the price.
- Cash toward the purchase price: $80,000.
- Illustrative closing charges and prepaid items: $17,000.
- Total buyer cash applied to the transaction: $97,000.
- Less a $20,000 deposit already credited in escrow: approximately $77,000 still to deliver, before final adjustments.
If the buyer began with $130,000 available, the transaction leaves $33,000. Allocate $8,000 for moving and immediate work and $25,000 remains as reserves. Those categories make the decision visible. Spending the full $130,000 on the price gap would produce a very different purchase.
These figures are planning examples, not quotes or an assurance that a second loan will be approved. If the mortgage balance changes, a lien must be paid, a credit is disallowed or the closing date moves, update the worksheet. A $10,000 lower assumed balance increases the amount the price must cover by $10,000 unless another term changes.
Prepare a separate monthly worksheet: both loan payments, applicable mortgage insurance, taxes, insurance, HOA dues and assessments. The mortgage-assumption service page shows an itemized monthly example. Cash-to-close and monthly affordability answer different parts of the same buying decision.
A credit and a price reduction solve different problems
A permitted closing-cost credit can reduce certain expenses the buyer pays at settlement. A price reduction changes the difference between the purchase price and the assumable mortgage. They are not interchangeable, and a credit cannot automatically be converted into cash back or used for any purpose the parties choose.
Suppose the buyer can fund the price gap but is short on closing expenses. A properly permitted credit may address the actual obstacle. If the gap itself exceeds available cash and approved financing, changing the price or financing structure may matter more. Ask the assumption processor and any second lender to approve the proposed treatment before you rely on it.
Brokerage compensation and responsibility for it also belong in the written agreements and program review. Do not assume a general seller-credit allowance settles every compensation question. At Blum Realty Group, I help coordinate the negotiation with the people responsible for approving and closing the transaction so the agreement and the funding plan match.
Request the estimates early enough to use them
Get the current loan statement and assumption instructions, an itemized servicer fee estimate, preliminary title information, escrow’s estimated settlement figures, and the proposed second-loan terms if applicable. Obtain an insurance quote and relevant HOA records. Ask about approved or upcoming assessments, transfer charges and separate special taxes.
Use a buyer-specific property-tax estimate. The San Diego County Assessor explains how ownership changes can affect assessment. Supplemental bills can arrive separately from ordinary impounds. Confirm the property’s actual tax and assessment structure rather than copying the seller’s payment.
Keep one reconciled worksheet with a date and a source beside each figure. Replace placeholders as written information arrives. Before removing relevant contingencies, identify what remains estimated, how much it could change and whether the purchase still fits if it does.
Common closing-cost questions
Are assumption closing costs always lower than new-loan costs?
No universal total applies. An assumption may avoid some new-loan expenses, but the program fees, title and escrow work, prepaid items and any second financing still need an itemized comparison. Compare the full transaction, not one processing fee.
Is the seller’s equity part of closing costs?
It is part of the purchase funding, not a service charge. Subtract the assumable balance from the price, determine how that difference will be funded, and then add transaction expenses and prepaid items. Keep retained reserves separate.
Can the assumption funding fee simply be added to the VA loan?
VA’s assumption guidance says the applicable 0.5% funding fee is collected at closing and may not be financed into the existing loan balance. Confirm any exemption and the permitted source of funds with the processor when preparing the cash estimate.