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What is amortization in real estate financing?

Discover how amortization in real estate financing can reduce debt and ensure savings when paying off your property faster

By CASACOR Publisher

Submitted at Dec 19, 2025, 11:30 AM

08 min de leitura
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jakub-zerdzicki-heiYgqp0Tsk-unsplash (Jakub Zerdzicki/Unsplash/Divulgação)

Buying your own home is the dream of millions of Brazilians, but the path to the definitive deed usually goes through a long-term contract with a financial institution. Amid so many acronyms, fees, and technical terms, one concept stands out as the most fundamental for those who wish to pay off their property: amortization in real estate financing. Contrary to what many think, the monthly payment you make is not just to "reduce" the value of the house; it consists of different parts, and understanding how each one works is the key to saving thousands of reais.
keys; apartment; financing; purchase; rent

(Jakub Zerdzicki/Unsplash/Disclosure)

Amortizing literally means "killing" a debt gradually. In the real estate context, it is the part of the monthly payment that goes directly to the reduction of the original debt balance (the amount you borrowed), excluding interest, insurance, and administrative fees. When you make a strategic payment to reduce the time or value of the installments, you are making an extraordinary amortization. Mastering this mechanism allows you to have control over the effective total cost of your credit and plan your financial freedom with much more security.

1. How the monthly installment calculation works


The installment that arrives in your bank app or bill every month is a "package" composed of four main elements: amortization, interest, mandatory insurance (MIP and DFI), and the administration fee. Interest is the cost of renting money, calculated on the current debt balance. Insurance are legal requirements that protect both the bank and your family in cases of death, disability, or physical damage to the property.
keys; apartment; financing; purchase; rent

(Jakub Zerdzicki/Unsplash/Disclosure)

The magic happens in the amortization part. While interest and fees are "lost money" (costs of the service), amortization is what effectively increases your percentage of ownership over the asset. In decreasing installment systems, at the beginning of the contract, a considerable part of what you pay is interest, but as the debt balance decreases, the proportion of amortization within the installment tends to have a greater impact on the total amount owed.

2. The difference between SAC and Price Table


There are two main systems of amortization in Brazil: SAC (Constant Amortization System) and the Price Table. In SAC, the amount intended to reduce the debt is always the same in all installments. As the debt balance drops consistently, the interest (which is applied to this balance) decreases each month, making the installments decrease - the first is the most expensive, and the last is the cheapest.
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(Freepik/Disclosure)

In the Price Table, also known as the French System, the installments are fixed from beginning to end of the contract (corrected only by inflation or TR). In the beginning, almost the entire value of the installment is interest, and the amortization is very small. It is an attractive model for those who need a smaller initial installment to fit into the budget, but over time, the total cost of interest tends to be much higher than in the SAC model.

3. The power of extraordinary amortization


Extraordinary amortization occurs when you use a financial reserve, such as the 13th salary or FGTS, to make a payment in addition to the monthly installments. By doing this, the amount paid goes 100% towards reducing the debt balance, without accruing interest on that specific amount. It is the most efficient strategy for those who want to drastically reduce the total cost of real estate financing.
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When deciding to amortize an extra amount, the bank will offer you two options: reduce the value of the monthly installment or reduce the term (number of months). Reducing the term is usually the mathematically advantageous choice, as you eliminate the payments at the end of the contract, on which interest would accrue for many years. However, reducing the installment amount may be ideal for those seeking immediate relief in their monthly cash flow.

4. The use of FGTS as an ally in the process


The Fundo de Garantia do Tempo de Serviço (FGTS) is one of the most powerful tools for amortization in real estate financing. The worker can use the balance of their linked account to reduce the debt. This strategy substantially accelerates the payment of the property, utilizing money that earns little in the fund to eliminate a debt that typically has higher interest.
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(Freepik/Disclosure)

However, currently, there are rules for this use: the property must be residential, located in the region where you work or live, and the value of the property must respect the limits of the Housing Finance System (SFH). In addition to amortizing the debt balance, FGTS can also be used to pay up to 80% of the installment value for a period of 12 months, which is excellent for times of professional transition or financial reorganization.

5. Practical tips to pay off your property faster


To make the most of amortization, discipline is essential. One golden tip is to try to "round up" your installment payment. If your bill is R$ 1,850.00 and you can pay R$ 2,000.00, that extra R$ 150.00 per month directed to amortization can reduce years off the contract. Keeping an emergency reserve before starting to amortize aggressively is also essential to avoid being unprotected in case of unforeseen events.
keys; apartment; financing; purchase; rent

(Jakub Zerdzicki/Unsplash/Disclosure)

Finally, always monitor the Effective Total Cost (CET) of your financing. Sometimes, the market offers opportunities for credit portability with lower interest rates. By migrating your debt to a bank with lower rates and continuing to maintain the pace of extraordinary amortizations, you can amplify the snowball effect in your favor. Remember: every real amortized today is one less real that the bank can charge interest on in the future.

CASACOR Publisher is a creator of exclusive content, developed by the Technology team of CASACOR based on the knowledge base of casacor.com.br. This text was edited by Yeska Coelho.