An online banking service refers to all the operations that a customer can perform from a web interface or a mobile application, without going to a branch: balance inquiries, transfers, loan subscriptions, card management. Behind this simple definition lie significant differences between institutions, both in terms of actual fees and the functionalities accessible on a daily basis.
Virtual card and immediate access to the bank account
Most comparisons focus on the price of the physical card. One criterion that is at least as decisive often takes a back seat: the virtual card usable immediately upon account opening.
Le Monde emphasizes that opening an account can provide immediate access to a virtual card, without waiting for the physical card to arrive by mail. This eliminated delay changes the game for urgent online purchases or setting up direct debits from day one.
The virtual card also serves as a safeguard against fraud: it generates a one-time or limited-use number, which reduces exposure in case of data breaches on a merchant site. Various players, from BoursoBank to Fortuneo, integrate this feature, but the terms vary depending on the chosen offer.
Before comparing the rates of traditional cards, it’s better to check if the bank also offers access to this option, available notably through the Guide De Banque Cortal website, which lists the various offers on the market.
Hidden fees of online banks: beyond the advertised free services

The free banking card is the main selling point of online banks. This free service sometimes hides real costs in areas that users discover late.
The fees to watch out for fall into several categories often absent from promotional homepages:
- Inactivity fees: some banks charge for the account after several months without transactions, a common trap for a secondary account that is opened and then forgotten.
- Payment incidents and unauthorized overdrafts: intervention fees vary widely from one institution to another, sometimes in proportions from one to three.
- Replacement of lost or stolen cards: this fee, rarely free, can represent several dozen euros depending on the offer.
- Closure or transfer fees: banking mobility is free thanks to the legal mandate, but additional fees may apply to the transfer of certain savings products.
A reliable comparison therefore does not limit itself to the monthly cost of the card. It includes the total cost of use, taking into account the actual profile of the customer: frequency of payments abroad, occasional overdraft needs, number of monthly withdrawals.
Foreign currency payments: which banks really eliminate fees
Foreign currency payments used to be a costly item, with exchange commissions reaching several percent of the amount. Several online banks now eliminate these fees depending on the card held.
Le Monde cites BoursoBank, Fortuneo, Hello bank!, Monabanq, N26, Sumeria, and Trade Republic as offering free foreign currency payments, provided the appropriate card is held. The nuance is significant: on a free entry-level offer, foreign currency payments may still incur charges, whereas a premium card (sometimes paid) includes them at no extra cost.
For a regular traveler or frequent buyer on foreign sites, the actual annual cost of a premium card may be lower than that of a free card with exchange commissions. This calculation, specific to each profile, deserves to be considered before any subscription.

Physical access and cash deposits: the criterion that all-digital neglects
100% digital management suits most everyday operations. It reaches its limits when it comes to depositing cash or cashing a check. This need, even occasional, becomes a differentiating criterion.
Hello bank!, backed by the BNP Paribas network, allows its customers to use physical branches for these operations. This connection to a traditional network offers a concrete solution for cash and check deposits, where other online banks require using a third-party account or a postal mandate.
Before migrating to an exclusively digital bank, it is useful to assess the actual frequency of these operations. A merchant, a landlord cashing rent checks, or anyone regularly receiving cash has an interest in maintaining physical access, even if it means combining two institutions.
Operational security of online banking services
Strong authentication (validation by fingerprint, temporary code, or push notification) has become mandatory for online payments in the European Union. Beyond this regulatory base, several features enhance daily protection.
- Instant notifications for each payment: they allow immediate detection of an unauthorized transaction.
- Temporary card blocking and unblocking from the app: useful in case of doubt about a loss, without initiating a definitive opposition.
- E-blue card or one-time virtual card: it limits exposure of the real card number when making purchases on unfamiliar sites.
These tools exist in most online banks, but their accessibility varies. Some are reserved for premium offers, while others are available from the free plan. Checking their presence in the basic offer avoids paying a monthly surcharge for a security feature that should be standard.
The choice of an online bank relies less on the promise of free services than on the alignment between actual fees, security features, and the customer’s concrete usage. An immediate virtual card, foreign currency payments without commission, and occasional access to a physical counter outline three axes of comparison that are more reliable than a simple pricing grid.



