Mortgage Portability in Mexico: Switch Banks and Save

If you signed your mortgage a few years ago at a high rate, you may be paying more than you need to today. Mortgage portability lets you move your loan from one bank to another that offers better terms, without having to sell your home or start over from scratch. In this guide, updated for the 2026 landscape, we explain clearly what the subrogación de acreedor (lender substitution) is, when it makes sense, how much it costs, and how to do it step by step.

What is mortgage portability?

Mortgage portability, technically known as subrogación de acreedor (lender substitution), is the process by which a new bank pays off the balance of your mortgage with your current bank, and you continue paying the loan to the new institution, usually under better rate or term conditions. The debt doesn't disappear: it simply changes lenders.

The important thing is that you don't sell or re-buy your home. The property remains yours; the only thing that changes is which bank holds the registered mortgage. That's why it is usually cheaper than taking out a completely new loan, although it does involve a formal procedure before a notary public (notario público).

When does it make sense to switch banks?

Portability isn't always worth it. As a general rule, it's worth analyzing when several of these conditions are met:

• The rate difference is significant. If another bank offers you a noticeably lower rate than what you pay today, the savings can justify the costs of the process.
• You still have a long term ahead. The more years remaining on your loan, the greater the benefit of lowering the rate, because the savings accumulate over time.
• Your outstanding balance is still high. If you're almost done paying, the fixed costs of the process can eat up the savings.
• You want to lower your monthly payment. Besides the rate, some schemes let you adjust the term to reduce the monthly payment, although that may increase the total interest paid.
• Your credit profile has improved. If your record is better today than when you signed, you will likely qualify for more favorable terms.

Before deciding, we recommend comparing the current offers on the market. You can use our guide to the 2026 mortgage loan comparison to get an overview of your options before approaching a bank.

Costs: appraisal, fees, and penalties

Although portability is usually cheaper than a new loan, it isn't free. These are the items you should normally consider. Amounts vary depending on the bank, the state, and the value of your property, so treat them only as a reference.

As a commercial strategy, some banks offer to absorb part of these costs to attract customers from the competition. Always ask which costs the receiving bank covers and which are left to you, and get it in writing.

Requirements to port your mortgage

Although each institution sets its own policies, the requirements usually resemble those of a new loan, but with the advantage that you already have a demonstrable payment history. In general terms, you will need:

• To be current on payments on your existing mortgage, with no recent late payments.
• To have a good record with the credit bureaus (sociedades de información crediticia).
• To show sufficient, stable income to cover the monthly payment.
• For the property to have its escrituras (title deeds) in order and be free of other liens.
• To present an official ID, proof of address, and the account statements the bank requests.
• To accept an updated appraisal of the home.

The receiving bank will evaluate your profile as if it were a new loan. A record of on-time payments on your current mortgage works in your favor and can help you negotiate better terms.

Step by step to switch your mortgage to another bank

1. Review your current loan. Request your outstanding balance, your current rate, and the remaining term, and check whether your contract includes a prepayment penalty.
2. Compare offers. Ask several banks for quotes, comparing the rate and above all the Costo Anual Total (CAT, or Total Annual Cost), which includes fees and insurance.
3. Request the analysis at the new bank. Submit your documentation so they can evaluate your profile and confirm the terms.
4. Get the appraisal. The receiving bank will require an updated valuation of your property by an authorized appraiser.
5. Wait for formal approval. Once the analysis and appraisal are ready, the bank issues the final offer in writing.
6. Sign before a notary public. The substitution is formalized: the new bank pays off the previous one and the mortgage is registered in its name in the Registro Público de la Propiedad.
7. Start paying under the new terms. From the signing date, your monthly payments are calculated with the new rate and term.

Savings example

Let's look at an illustrative, simplified case, solely to understand the logic of the savings. Real numbers depend on your balance, your rate, and your term, so don't take them as a quote.

Imagine you have several years left on your mortgage on a sizable balance and that your current rate is clearly higher than what another bank offers today. By lowering the rate, each monthly payment sends a smaller portion to interest and a larger one to principal. Over the remaining years, that difference can translate into considerable savings in total interest, as well as a possible reduction in the monthly payment.

The key is to compare two things: how much you would save in interest over the remaining term versus how much you would pay in process costs (appraisal, notary, and possible fees). If the projected savings comfortably exceed those costs, portability makes sense. If they barely break even, it's probably better to stay where you are or negotiate with your current bank.

If, besides reorganizing your loan, you're thinking about your future net worth, you may want to know the current value of your property. You can estimate it with our tool to calculate how much your home is worth or explore the market in our property search section.

Frequently asked questions

Does mortgage portability affect my credit history?

The process involves a check of your credit history, like any loan application. However, paying off your previous mortgage and keeping up on-time payments with the new bank should not hurt your profile; on the contrary, good payment behavior strengthens it over time.

Can I switch banks if I had a late payment in the past?

It depends on each institution. An isolated late payment that has already been brought current doesn't necessarily rule you out, but recent or recurring delinquencies make approval harder. Ideally, you should be current at the time you apply for portability.

How long does the process take?

It varies depending on the bank and notary availability, but it usually takes from a few weeks to a couple of months, considering the analysis, the appraisal, and the signing of the deeds.

Is it always best to look for the lowest rate?

Not necessarily. A low rate paired with high fees or costly insurance can end up being more expensive. Always compare using the CAT and review the full terms before deciding.