How a Portuguese mortgage is paid off, and when paying early is worth it

For home loans in Portugal only — offers from Portuguese banks, under Portuguese taxes and fees. The banks’ documents will still be in Portuguese; this page explains them in English.

A Portuguese mortgage is repaid in level monthly payments: each month you pay interest on the capital you still owe, and the rest of the payment pays that capital down. In the early years it is nearly all interest — on a €200,000 loan over 40 years at 3.00%, the first payment of €715.97 is €500 of interest and only €216 of capital, and capital only overtakes interest in year 17. Early repayment (amortização antecipada) means paying capital back outside the monthly payments: it stops carrying interest to the end, in exchange for a fee capped by law at 0.5% on a variable rate and 2% on a fixed one. You choose whether it shortens the term, which saves more interest, or lowers the payment, which frees up money every month.

Updated 3 November 2026

What each payment pays for

Portuguese banks use the level-payment (French) system. The payment is worked out so that, at the same rate, the loan is paid off exactly at the last one. Inside it, the split changes every month:

The month’s interest is the yearly rate divided by 12, on the capital owed at the start of the month.
The rest of the payment is capital repaid: it comes off the debt and is yours, in the home.
With less owed, next month’s interest is a little lower and the capital share a little higher. At first the debt falls slowly; towards the end, fast.

That is why the capital still owed, not the amount you borrowed, is the number that matters: interest, the life insurance premium and what you would hand over to settle the loan are all worked out on it.

Example: €200,000 over 40 years

At 3.00% — the average on new loans in August 2026, according to the Banco de Portugal — and unchanged to the end:

The payment is €715.97 a month.
In the first year you pay €5,964 of interest and repay €2,628 of capital.
Only in year 17 does the capital share become larger than the interest.
After 10 years you have repaid €30,180, 15% of the loan; after 20, €70,903, 35%; after 30, €125,853, 63%.
By the end you pay €143,665 of interest, before insurance and fees.

Anyone who sells or switches banks after a few years finds the debt has barely moved. It is not the bank’s mistake: it is how the system works.

When the rate changes

On a variable rate, and on a mixed one once the fixed period ends, the payment is only level between reviews. At each review the bank applies the new Euribor and works the payment out again on the capital owed and the term left. The term stays put: it is the payment that rises or falls.

When the Euribor rises, more of each payment goes to interest and the debt falls more slowly than in the original plan; when it falls, the opposite.

Early repayment: the rules

You can hand capital back to the bank whenever you like, in part (partial repayment) or in full (settlement). The bank cannot refuse, and may only charge the early repayment fee:

Up to 0.5% of the capital repaid on a variable rate.
Up to 2% on a fixed rate. On a mixed rate, the fixed rate’s fee while the fixed period lasts, and the variable one after.
The law asks for notice to the bank: 7 working days for a partial repayment, 10 for a full one.

Each offer’s fee is in section 9 of the FINE, «Reembolso antecipado». Read promotions’ terms too: some waive months of interest or fees and make you pay them back if you settle or move the loan in the first few years.

Shorten the term or lower the payment

On the same loan, handing over €10,000 in year 5 costs €50 in fees on a variable rate (€200 if still in a fixed period) and gives two choices:

Shorten the term: the payment stays at €715.97 and the loan ends 3 years and 2 months sooner. You save €17,239 of interest.
Lower the payment: the term stays the same and the payment drops to €677.48. You save €6,164 of interest.

Shortening the term saves more because you keep repaying capital at the same pace, on a smaller debt. But the two are less different than they look: with the second you keep the difference in the payment every month, to save or invest. Lowering the payment is worth it when the budget is tight, or ahead of a rise in the Euribor.

When paying early is worth it

Paying early earns no interest: it avoids it, which comes to the same thing and pays no tax. The money handed over earns, in effect, close to the loan’s rate, minus the fee. Before paying early:

Keep an emergency fund. Capital handed to the bank does not come back: if you need it, you will have to borrow again, at a higher rate.
Compare it with what the money would earn elsewhere, after tax. A term deposit rarely beats the loan’s rate; a riskier investment may, with no guarantee.
Pay off the dearer loans first — car, personal loan, card — before the mortgage.
The earlier, the more you save: capital handed over in year 5 stops carrying interest for 35 years; in year 30, for 10.
Avoid a mixed rate’s fixed period if you can wait: the fee can be four times higher.

There are gains that do not show in the interest sum: life insurance is priced on the capital owed and gets cheaper, and a smaller debt leaves room to switch banks or take another loan. On the other side, interest is only deductible from income tax (IRS) on contracts from 2011 or earlier: on those, paying early also shrinks the deduction.

Running it on your own offers

On qualcredito.com, the comparison’s «What if?» section, under «Paying early», adds a monthly overpayment or one-off payments to each offer, with each bank’s fee, and shows the interest saved, the term shortened and the equivalent return on the money handed over — the rate an investment would have to beat.