Assume the seller's mortgage in Alicante: save €4,000 in fees

The notary's clock reads 11:30 on calle San Vicente. You arrive with your NIE, a wire transfer ready, and a head full of numbers. But there is an option many resale buyers in Alicante discover too late, or never discover at all: instead of cancelling the seller's mortgage and opening a fresh one, you can step into theirs.

It is called debtor subrogation. One deed, three signatures, and if the math works, several thousand euros you never pay.

What stepping into the debt actually means (and why it is not switching banks)

When people hear 'mortgage subrogation' they think of moving a loan from one bank to another in search of a better rate. That is creditor subrogation, regulated by Law 2/1994 published in the BOE on 30 March of that year. Ours is something else.

Debtor subrogation swaps the borrower. The seller had an open mortgage on the property. You take it on with the same bank, the same outstanding capital, the same term and the same rate. No new loan is born: the existing one continues under your name. The legal base sits in the Civil Code and the Mortgage Law.

The signing: three parties, one morning, one deed

On signing day four people sit at the notary's table: you, the seller, the bank's authorised agent, and the notary. The purchase deed is signed first and, in the same act, the subrogation. The buyer enters the existing deed, the seller exits, and the mortgage stays inscribed in Alicante's Property Registry without having to be cancelled and re-registered.

That simultaneity is what creates the tax magic. If you cancelled the seller's mortgage and then signed a new one, you would face two deeds, two registrations and two tax filings. With subrogation you face one.

What the buyer stops paying

Down to the numbers. These are the items skipped when you subrogate instead of opening a fresh mortgage, calculated on a real example: a €200,000 home in Playa de San Juan, outstanding mortgage of €150,000 over 25 years at a fixed 2.9%.

• AJD (Stamp Duty on Documented Legal Acts). The general rate in the Valencian Community is 1.5% until 31 May 2026 and drops to 1.4% on 1 June 2026 under the regional tax reform. It is calculated on the mortgage liability (typically around 130% of capital). On our €150,000 mortgage that is €2,730 to €2,925 not paid. The single biggest saving.
• Opening fee. A new mortgage would charge between 0.5% and 1% of capital. On €150,000 that is €750 to €1,500 that never appears.
• Valuation. The mortgage already exists with a current valuation. If the bank accepts it without renewing, you save between €300 and €500.
• Notary, registry and processing of the new mortgage. Under Law 5/2019 the bank pays these, but the buyer ends up feeling the difference in stiffer terms and less margin to negotiate.

Total without rounding: around €3,500. With luck, €4,000. On larger operations, more.

What the seller saves

For the seller, subrogation avoids the cost of registering the mortgage's cancellation. We are talking notary fees (starting at €90), registry (a €24 minimum), processing (€100 to €500) and filing the AJD return with a zero balance. Idealista's 2026 figures put average cancellation costs at about €1,000.

That saving is a negotiation lever. If the seller knows they will not pay that thousand, they often accept a small concession on the price. Bring it up before signing the arras.

The detail that changes everything: the bank has to say yes

Subrogation is not a buyer's right. The bank analyses your risk profile as if you were requesting a brand new mortgage: payslips, contracts, debt ratio, CIRBE history. If the monthly payment takes more than 35% of your income, you will most likely get a no, the same as with any other loan.

The bank is not bound to keep all conditions either. It can use the operation to ask for a small novation: shorter term, tied home insurance, a payroll account. Negotiate with data in hand and compare against what another lender would offer you on a fresh mortgage.

And read the fine print of the original mortgage. Some contracts signed between 2012 and 2018 include a subrogation commission of up to 2.5%. If the outstanding capital is high, that commission alone can eat the tax saving.

When NOT to subrogate

The operation shines when the seller's mortgage has good terms: a low fixed rate (below 3%), long term, no aggressive commissions, in a bank you can deal with. If any of those boxes fails, the math changes.

If the seller's mortgage is Euribor plus 1.5% and you can get a fixed 2.75% today, the €4,000 saving in fees evaporates in two or three years of pricier payments. And if the subrogation commission is 2.5% on a €200,000 capital, that is €5,000 paid upfront just to keep the mortgage: it is no longer a deal.

Your checklist before signing the arras

If you want to explore this route, fit four questions into the first conversation with the seller:

1. How much capital is left and at what rate? (Ask for the last payment slip or the bank's global position statement.)
2. What year was the mortgage signed? (That tells you which commission framework applies.)
3. Which bank and branch? (Some lenders are nimble with subrogations, others will burn your weeks.)
4. Does the original deed mention a subrogation ban? (Unusual, but possible.)

With that information, visit the seller's bank before putting a euro on arras. Ask for a written pre-approval of the subrogation. If they say yes on reasonable terms, then sign the deposit.

If they say no, the deal is not dead: you can still buy the home with a fresh mortgage. But at least you will know there was no shortcut.

At ESYS VIP we help you read the fine print of every operation before you sign anything. Explore our properties in Alicante or contact us to talk about yours.