Savings account or fixed-term deposit — what are we talking about?
Two products, one family: secured bank savings. They share the deposit guarantee and the tax treatment, but the rest diverges.
The savings account (sometimes called a passbook or free savings account) stays fully liquid. Deposit, withdraw, re-deposit — no time commitment. In exchange for that flexibility the bank pays a variable rate it can revise at any moment, typically with a contractual notice period of a few days to a few weeks.
The fixed-term deposit (or term deposit) works the opposite way: you lock capital for a duration chosen upfront — typically 1, 3, 6, 12, 24, 36 or 60 months. The rate is fixed on the day you sign and never moves. You can't touch it before maturity without a penalty; in return, you earn more than on a passbook.
In Luxembourg most retail banks offer both. Many savers combine them: a liquid buffer on a savings account plus a locked slice on a term deposit for extra yield.
How each one works, in practice
Both open online, often in under ten minutes at modern banks. Identification via LuxTrust, video verification, or a verification transfer from an existing account.
On a savings account, interest accrues daily (usually on a 365-day basis) and is credited once or twice a year — most often on 31 December, sometimes quarterly. The headline rate is gross per year. You can add or drain funds freely; some products require 32 days' notice for larger withdrawals, others don't.
On a fixed-term deposit, everything freezes on day one: amount, rate, term. Interest accumulates until maturity and is paid in one go with the principal to your linked current account. Many banks offer automatic rollover at prevailing market conditions — convenient, but worth watching if rates have dropped in the meantime.
Benefits, product by product
The savings account plays on flexibility. Your money stays available for an emergency, a project firming up, an investment opportunity. No commitment, no penalty, usually no deposit ceiling. It's the right home for an emergency fund — advisers typically recommend three to six months of living expenses.
The fixed-term deposit, by contrast, locks in yield. Once signed, the rate can't fall, even if the ECB eases policy a few months later. For capital you know when you'll need — property down payment in eighteen months, a child's studies, retirement top-up — it delivers the best visibility on return.
Common ground: capital protected up to €100,000 per depositor per bank (FGDL in Luxembourg or an EU equivalent), fast onboarding, and typically no account fees.
The real risks, without hype
Bank failure is a real but distant risk in the eurozone, and it's covered by the €100,000 deposit guarantee per holder per bank anyway. Above that ceiling, you split.
The real risk on a savings account is the rate. The bank can cut it overnight. A passbook opened at 2.5% can drop to 1.2% within months if the ECB eases — and you have no recourse, only the option to move your money elsewhere. It's also a product that loses to inflation as soon as the net rate (after RELIBI) sinks below CPI.
On a fixed-term deposit the risk flips: you're locked in. If policy rates climb again, your deposit suddenly looks uncompetitive, and breaking it early costs all or part of the accrued interest. The classic counter-strategy is a "ladder": split the capital across staggered maturities (6, 12, 24, 36 months) so you get regular chances to rotate.
The FGDL guarantee and its European equivalents
In Luxembourg, the Fonds de Garantie des Dépôts Luxembourg (FGDL) covers deposits up to €100,000 per depositor per Luxembourg-licensed bank. The mechanism applies identically to savings accounts and to term deposits — no distinction. The ceiling comes from EU directive 2014/49/EU, transposed in every member state: EdB in Germany, FGDR in France, DGS in the Netherlands, Depositor Compensation Scheme in Malta, and so on.
Practical consequence: on a €300,000 nest egg, three banks beat one. The EU country doesn't matter — an account in Estonia is protected exactly like one in Luxembourg City, up to the common ceiling. The UK (FSCS, £85,000) and Switzerland (esisuisse, CHF 100,000) sit outside the EU with their own rules.
RELIBI: same rules for both products
Savings account or fixed-term deposit, the Luxembourg tax treatment is identical. Interest paid by a Luxembourg bank to a Luxembourg resident is subject to the RELIBI final withholding tax at 20%. The bank withholds, remits, and you have nothing to declare: the tax is final.
An annual €250 interest allowance per taxpayer per bank is exempt from the withholding. A jointly assessed married couple gets €500 per bank. The allowance applies at bank level, aggregated across savings accounts and term deposits at that same bank.
On interest from foreign banks (EU or non-EU), RELIBI doesn't apply automatically. The Luxembourg resident can elect each year for the same 20% final tax through a specific declaration — otherwise the interest is added to global income and taxed at the progressive personal income tax rate. Worth arbitrating based on your marginal bracket.
How to choose between them (and why often both)
The question isn't "which is better" but "what for". Answer in five questions:
1. When will you need the money? Unknown or under six months → savings account. Specific date at 12-36 months → fixed-term deposit. 2. How much can you lock up without stress? The emergency fund (3 to 6 months of expenses) always stays on a savings account. 3. Do you expect ECB rate cuts? Locking in via a longer term deposit today makes sense. Expecting hikes? Stay short or variable. 4. What's the real net rate after RELIBI? A term deposit at 3.2% gross = 2.56% net. A savings account at 2% variable can drop to 1.2% in six months. 5. Are you under €100,000 per bank? If not, split.
Most common combination: liquid emergency fund on a savings account plus a term-deposit "ladder" on the lockable capital.
Luxembourg vs Europe: the cross-border trade-off
Luxembourg's retail market is thin. Three or four dominant players, domestic rates rarely above 1.5% on the best tenors. Baltic, Portuguese, Maltese or Italian banks sometimes deliver 100 to 150 basis points more, under an FGDL-equivalent guarantee.
The mechanics are simple: free SEPA transfer, online onboarding, EU-harmonised €100,000 protection. Nothing meaningfully different from a domestic account, beyond a few extra onboarding minutes. On tax, foreign interest must be declared in Luxembourg — either via the 20% final tax election or as part of global income.
Multi-bank platforms like PickTheBank aggregate access to several European banks through a single custody account: one identification, one interface, multiple pots to open. Handy for diversification, whether you're building a spread of savings accounts or a term-deposit ladder.