Is it worth paying off your mortgage early?
Repaying early pays down capital so you pay less interest. It almost always wins on interest, as long as you don't need the cash. Here's how it works and what to choose.
TL;DR
Repaying your mortgage early means using spare cash to pay down the outstanding capital and so pay less interest. On interest it almost always wins: the fee is small (at most 0.5% on a variable rate, sometimes waived) against the interest you save. After repaying, you can shorten the term (saves more interest) or lower the payment (eases the budget).
What does repaying your mortgage early mean?
Repaying early (amortização antecipada) means using spare cash to **pay down the outstanding capital, paying more than the instalment requires, so you owe the bank less1. Because interest is charged on the outstanding capital, paying down capital means paying less interest to the end of the loan.
You can do it two ways: a partial repayment (pay down part) or a full repayment (clear the loan at once). This article focuses on partial repayment, the most common question.
Shorten the term or lower the payment?
After you repay, the bank lets you choose what to do with the loan that remains. There are two options, and the choice changes how much you save:
- Shorten the term: keep the same payment and the loan ends sooner. This saves the most interest, because the money you repaid stops earning interest for the whole remaining term.
- Lower the payment: keep the term and pay a smaller instalment. It eases the monthly budget but saves less interest than shortening the term.
Rule of thumb: if the current payment is comfortable and your goal is to save the most, shorten the term. If you need to ease the month, lower the payment (knowing you save less interest).
How much do you save? (worked example)
Say you owe €120,000 at a 3.5% TAN with 25 years to go, making a payment of about €600.75. Without repaying, you would pay close to €60,224 in interest to the end.
If you repay €10,000 early (0.5% fee, i.e. €50):
- Shortening the term: the loan ends about 38 months sooner and you save around €12,697 in interest (€12,647 net of the fee).
- Lowering the payment: it falls to about €550.69/mo and you save around €5,019 in interest (€4,969 net).
Shortening the term saves more than double. Run it on your numbers in the early-repayment calculator.
What about the early-repayment fee?
Repaying early carries a cost: the early-repayment fee. By law it is capped at 0.5% of the capital repaid on variable-rate loans and at 2% on fixed-rate ones2. There has also been a temporary exemption for early repayment of variable-rate own-permanent-home credit, so you may pay no fee at all. Because these rules change, confirm the fee in force on your loan's information sheet.
Even so, note the scale in the example: the fee (€50) is a tiny fraction of the interest saved (€12,697). That is why, on interest, repaying early almost always wins.
So, is it worth it?
On interest, almost always: every euro paid down stops earning interest and the fee is small. The real decision is liquidity and alternatives:
- Is the cash genuinely spare? Don't repay what you might need. Keep an emergency fund: borrowing again later is more expensive than the interest you saved.
- Where does it earn more? Compare the interest saved with what you'd earn putting that money somewhere of comparable safety (for example savings certificates or a term deposit). If the loan rate is higher than that earns net, repaying wins.
The saving is bigger the earlier you repay and the higher the rate. With Euribor driving the payment, it is worth revisiting the decision whenever you have spare cash.
Common mistakes
Lowering the payment by reflex
Lowering the payment eases the month but saves less interest. If your goal is to save the most and the current payment is comfortable, shortening the term is usually worth more than double.
Forgetting the fee
Early repayment carries a fee (at most 0.5% on a variable rate, 2% on a fixed one). It is small against the interest saved, but it belongs in the maths, the calculator shows the saving already net of the fee.
Repaying with no buffer left
Don't repay cash you might need. Keep an emergency fund: early repayment is hard to reverse, and borrowing again is more expensive.
Frequently asked questions
Is it worth paying off your mortgage early?
Is it better to shorten the term or lower the payment?
What is the early-repayment fee in Portugal?
Can I repay my mortgage early whenever I want?
How much do you save by repaying early?
Related reading & calculators
Sources
- 1.Reembolso antecipado do crédito à habitação — Banco de Portugal, Portal do Cliente Bancário · retrieved 1 Jun 2026
- 2.Decreto-Lei n.º 74-A/2017, regime do crédito à habitação (reembolso antecipado) — Diário da República · retrieved 1 Jun 2026
Author / Reviewed by
Author
Thorben Rasmus Idel
Founder & writer
Co-founder of Calculadora Capital. Writes the methodology and verifies the math behind every page.
Reviewed by
Nahar Geva
Co-founder & reviewer
Co-founder of Calculadora Capital. Reviews the methodology and verifies the math behind every page.
Published: Updated: Reviewed: