However, choosing between lowering monthly repayments and shortening the loan term can significantly affect how much they ultimately save.
Both options reduce the interest the bank charges, but they work differently.
While a partial early repayment usually lowers monthly instalments, shortening the mortgage term requires a separate agreement with the lender.
According to guidance from Banco de Portugal, borrowers can repay part of their outstanding mortgage capital before the end of the agreed contract, and the customer generally determines the amount, provided they follow the required procedures and notice periods.
Household budgets
For homeowners looking to free up money each month, reducing their mortgage instalments may be the more practical option.
When a borrower makes a partial early repayment, the outstanding capital decreases, and the bank then recalculates the monthly instalments based on the lower debt, while the original mortgage term remains unchanged.
This can provide some breathing room for households facing higher living costs or wanting to put money towards other expenses. Although the borrower will also pay less interest over the remaining life of the mortgage, the loan will continue for the same number of years.
As a result, overall interest savings may be smaller than those achieved by reducing the mortgage term.
Interest savings
An alternative is to use the money to bring forward the date on which the mortgage will be fully repaid.
Rather than lowering monthly instalments, the borrower keeps the repayment amount close to the existing one while reducing the number of years left on the loan, meaning the bank charges interest over a shorter period and potentially generates greater savings.
However, this option is not automatic, as customers must ask their bank to renegotiate the mortgage term, and the lender must agree to the proposed change.
Where the interest rate and other conditions are comparable, shortening the repayment period will generally save more in total interest than simply lowering the monthly instalment.
The trade-off is that borrowers must be comfortable continuing to make relatively high repayments.
Notice requirement
Anyone planning to repay part of their mortgage early must notify their bank at least seven working days in advance.
Banco de Portugal says that partial repayments must take place on a date corresponding to a scheduled monthly instalment, and borrowers can choose how much capital they wish to repay.
Once the bank receives the request, it must provide information about the financial consequences of the operation without undue delay, in writing or on another durable medium, explaining the assumptions used in its calculations.
For those intending to settle the entire mortgage before the agreed end date, the notice period increases to 10 working days.
Early repayment fees
Another factor homeowners should consider is the possibility of paying an early repayment commission.
In 2026, Portuguese banks can charge a maximum fee of 0.5 percent of the amount repaid on mortgages with variable interest rates, while for fixed-rate mortgages, the ceiling is 2 percent.
For example, someone making a €10,000 partial repayment could face a maximum charge of €50 under a variable-rate agreement or €200 under a fixed-rate contract.
These are maximum permitted amounts, not compulsory charges.
Banks may apply lower fees or waive them altogether, depending on the mortgage agreement.
A temporary exemption from early repayment commissions on certain variable rate mortgages expired on 31 December 2025.
However, exemptions remain available in specific circumstances, including cases involving the death or unemployment of a borrower, or a professional relocation.
Financial benefit
Ultimately, the best approach depends on a homeowner’s financial circumstances and what they want to achieve.
Those who are finding monthly expenses difficult to manage may benefit more from reducing their instalments, as this immediately frees up part of their household income.
By contrast, borrowers with sufficient disposable income to maintain their existing repayments may find that shortening the mortgage term offers better long-term value by reducing the total interest paid.
Before deciding, homeowners should ask their bank for simulations covering both options, as comparing the revised monthly instalments, remaining loan term, projected interest costs and any applicable commissions can help establish which option offers the greatest benefit.
Banco de Portugal also advises borrowers to get information about the financial consequences of early repayment before proceeding, so they understand how the decision will affect the overall cost of their mortgage.











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