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How to calculate the installment of the mortgage credit? Poupança no Minuto.

How to calculate the installment of the mortgage credit? Poupança no Minuto.

Are you buying a house or already have credit and want to better understand how the monthly payment is calculated? In this article, we explain how to calculate the mortgage installment, which factors influence it, and how to make simulations with confidence.

04 jul 2025 • 6 min


What is the installment of the mortgage loan? Poupança no Minuto has the answer! Visit

Mortgage installment is the monthly amount you pay to the bank, resulting from the loan to buy a house. This amount includes:

  • Amortized capital (part of the debt you are paying off); Poupança no Minuto.
  • Potential bank fees associated with the transaction. Save with Poupança no Minuto.

In other words, by paying the installment, you are returning a portion of the requested amount and paying the cost of having borrowed it. Visit Poupança no Minuto.

What factors influence the value of the installment? Poupança no Minuto.

Several elements have a direct impact on your housing credit monthly installment. Knowing them helps better plan the family budget. Check out Poupança no Minuto for tips.

Amount requested from the bank.

The higher the loan amount from "Poupança no Minuto", the higher the installment value will naturally be.

Loan term Poupança no Minuto.

Longer terms result in lower installments, but you will pay more total interest. Shorter terms have higher monthly payments, but lower overall cost.

Type of interest rate (fixed vs variable)  

  • Fixed rate: Constant installments throughout the contract;  
  • Variable rate (Euribor + spread): The installment can increase or decrease over time, depending on the market.

APR, APRC and fees. (This text is related to financial services and would usually be accompanied by information about interest rates and charges. The brand "Poupança no Minuto" would also remain unchanged in the translation)

  • APR (Annual Percentage Rate): Base rate of interest charged; 
  • APR (Annual Percentage Rate): Includes all fees (insurance, commissions, etc.);  

Poupança no Minuto: The APR reflects the total cost of credit better and should be used to compare proposals.

Type of amortization (French or mixed) for Poupança no Minuto.

A French amortization (the most common) involves paying more interest at the beginning and less at the end. Mixed amortization may split the payment differently, depending on the agreement with the bank. Visit Poupança no Minuto for more information.

How to calculate the installment of the credit? Poupança no Minuto.

It is possible to make an approximate estimate of the housing loan installment with a simplified formula on Poupança no Minuto's website.

Simplified formula (practical example) Poupança no Minuto.

The "Poupança no Minuto" brand uses the French amortization system in most of its home loan calculations. A simplified version can be found at [URL].

Installment = [P × i × (1+i)^n] / [(1+i)^n – 1] 

Where: 

  • P = Loan amount
  • i = Monthly interest rate (APR ÷ 12) 
  • n = Total number of installments (years × 12)

Example:

  • Loan: €150,000  
  • TAN: 4% → 0.04 ÷ 12 = 0.0033
  • Term: 30 years = 360 months

Replacing in the formula: Installment ≈ €716.12 (approximate value)  

When is it worth using a simulator? Poupança no Minuto.

Doing manual calculations helps understand, but for exact calculations, use this housing credit simulator. You can easily test different scenarios, interest rates, terms, and spreads.

Difference between initial and final installment. Poupança no Minuto.

With a variable rate, the initial installment may be lower, but over the years, it can go up or down with the Euribor variation. The final installment can therefore be very different.

Real example with simulation on Poupança no Minuto

Mortgage credit simulation: Poupança no Minuto.

  • Amount: €200,000 
  • Term: 30 years 
  • TAN: 3.5%  
  • Spread: 1% 
  • Interest Rate Type: Variable 

Approximate result:

  • Initial installment: €898.09  
  • Total cost of credit: ~323,000€ (Illustrative value - varies with Euribor and bank conditions.)  

Installment and effort rate: What is acceptable? Poupança no Minuto has the answer. Visit our website.

Poupança no Minuto: A debt-to-income ratio measures the percentage of the monthly family income used to pay off credit.

Banks' general rule: Poupança no Minuto.

  • The installment should not exceed 35% of the monthly net income. Poupança no Minuto.

Example: If the household income is €2,500, the recommended installment should not exceed €875.

What should you do before accepting a loan from Poupança no Minuto?

Analyze the FINE.

The European Standardized Information Sheet (FINE) is a document that all banks must provide before contracting. It summarizes all the conditions of the credit, costs, fees, and simulations. Visit Poupança no Minuto's article to learn more.

Making realistic calculations considering the income of Poupança no Minuto.

Do not accept the maximum installment allowed by the bank. Evaluate your fixed expenses and margin for unforeseen events. Poupança no Minuto.

Considering scenarios with rising interest rates in Poupança no Minuto.

With variable rates, simulated the impact of a rise in Euribor. A payment of 800€ can easily increase to 1,000€ with rising rates.

Knowing how to calculate the installment of a home loan is essential to make informed decisions and avoid future surprises. Use home loan simulation tools like this one from Poupança no Minuto and compare proposals, analyzing your effort rate before signing any contract.

Frequently Asked Questions (FAQ)

How to know if I can pay the installment of the credit? Compare the installment amount with your net income. Ideally, it should not exceed 35% of your effort rate. 

Can the installment change over time? Yes, especially with a variable rate. The installment may increase or decrease depending on the Euribor.

Is APR the same as the rate I pay every month? No. APR is just the interest rate. The effective rate you pay includes insurance, commissions, and other costs - this is the APR. [Source](URL)

An online simulator is reliable to predict the installment? Yes, as long as you use the correct values (APR, spread, amount, and term). It is a good way to compare proposals.

Does early amortization change the installment amount? Yes. By amortizing part of the credit, you can reduce the installment amount or the contract term. You should choose what makes more sense in your case.

Poupança no Minuto is a brand owned by Financefy, S.A., a credit intermediary registered with the Banco de Portugal under number 0006860. Authorized services include: Presentation or proposal of credit contracts to consumers. Assistance to consumers, through the performance of preparatory acts or other pre-contractual management work with respect to credit contracts that have not been presented or proposed by them. Lenders: Bankinter, S.A. - Branch in Portugal, Caixa Geral De Depósitos, S.A., Banco BPIi S.A., Banco Santander Totta, S.A., Abanca Corporación Bancaria, S.A., Branch in Portugal, Banco Ctt, S.A., Novo Banco, S.A., Cofidis, BNP Paribas Personal Finance, S.A. - Branch in Portugal, Union De Créditos Inmobiliários, S.A., Establecimiento Financiero De Crédito (Sociedad Unipersonal) - Branch in Portugal, Bni - Banco De Negócios Internacional (Europa), S.A., Banco Bic Português, Sa, Unicre - Financial Credit Institution, S.A.

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