Best Fixed Deposits in Portugal (2026)

The Portuguese fixed-deposit market splits into three groups. The five large domestic banks — Caixa Geral de Depósitos, Millennium BCP, Novo Banco, Santander Totta and BPI — offer conservative rates, typically 1.0–1.8% AER on 12 months, but with the deepest branch networks and the strongest name recognition. Smaller domestic banks (Banco CTT, Banco Best, Bankinter Portugal) push slightly higher, in the 1.8–2.5% range on the same term.

The second group is challenger and specialist banks: Openbank (Santander's digital arm), Banco BiG and a handful of Spanish-owned platforms that market cross-border to Portuguese residents. Rates here reach 2.5–3.0% AER on 12 months.

The third and highest-yielding group is cross-border EU banks accessed through platforms like PickTheBank and Raisin: Baltic, Maltese and Bulgarian banks currently pay 3.0–3.4% AER on 12 months, always DGSD-covered in their home country up to €100,000.

Portugal applies a flat 28% IRS withholding to interest income for residents (26.1% for Azores residents). The bank withholds the tax at maturity and pays the net amount to the depositor; residents can choose to include the interest in their annual IRS return instead if their marginal rate is lower, but for most workers 28% is the effective ceiling.

A 3.0% gross rate therefore delivers roughly 2.16% net to a resident depositor. When comparing offers, always compute the net-of-tax yield — a 2.5% deposit at a Portuguese bank (net 1.80%) is behind a 2.9% cross-border deposit at an Estonian bank (net 2.09%) even though the headline gap looks small.

For non-residents, Portuguese-source interest is also subject to 28% withholding, but this can be reduced under most Portuguese double-tax treaties — typically to 10–15% — with the appropriate form filed before payment. Cross-border deposits held via platforms are taxed in the depositor's country of residence under DAC2/CRS reporting.

Portuguese licensed banks contribute to the Fundo de Garantia de Depósitos (FGD), which guarantees eligible deposits up to €100,000 per depositor per bank. The scheme was fully tested during the Banco Espírito Santo collapse in 2014 and paid out within the DGSD-mandated 7-working-day target.

Cross-border deposits accessed via a platform are covered by the DGS of the bank's home jurisdiction — an Estonian deposit sold through PickTheBank is covered by the Estonian scheme, not the Portuguese one. Coverage limits are identical (€100,000) across the EU, but the paying-out fund differs.

For balances above €100,000, splitting across at least two separate licensed banks — ideally in different EU member states — captures the full protection on the entire amount.