Prepaid cards: what they are and how they work

Posted at 15 May 10:27h in Finance

Managing day-to-day life can be a puzzle. Between subscriptions, online purchases and the need to separate leisure money from bill money, it’s hard to control spending without constantly checking your bank account.

The prepaid card emerges as the ideal solution. It is an electronic money instrument that works with a balance previously loaded by the user and that, unlike others, is not connected to your main bank account.

By not allowing you to spend more than you have deposited, it acts as a “safety wall” for your savings. It is perfect for avoiding unforeseen issues online or for assigning a fixed budget to the family’s weekly expenses. In this article, we explain how these cards work and why they are an essential savings tool.

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What is a prepaid card

The prepaid card is a prepaid instrument designed to store electronic money, either on a physical or virtual support. Its main function is to allow payments and purchases using exclusively the balance that you have loaded in advance.

Unlike common credit or debit cards, this tool does not need to be linked to a current account. This means that the money you use is independent of your main savings, functioning as an isolated and secure deposit.

By the way, the Bank of Spain defines it as a product that allows payments, generally of small amounts, up to the limit of the balance provided to the issuing entity. Once the money runs out, you can easily reload it through transfers, ATMs or mobile applications.

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As an autonomous payment method, it offers an extra layer of protection: in case of loss or fraud, only the specific balance you decided to load would be at risk. It is, in essence, a digital wallet that gives you total control over how much you want to spend.

What are its characteristics and how do they work

To better understand why this instrument is so versatile, it is essential to know its operational pillars. Below, we present a comparison that summarizes its main characteristics and its daily usage mechanics:

Concept	Detail
Basic mechanics	You load a specific balance onto your card (physical or virtual) and it is progressively deducted with each purchase you make.
Bank independence	You don’t need to necessarily link it to a current account; thus you keep your main savings isolated from any risk.
Reload methods	You can easily add balance when you need it through the App, the website, ATMs or physical branches.
Versatility of use	You use it exactly like a conventional card, both for purchases in physical stores and online shops.
Control and limits	Your spending is strictly limited to the balance you have recharged, which helps you avoid debt or unexpected overdrafts.
Reinforced security	In case of theft or online fraud, the risk for you is limited exclusively to the amount you have available at that moment.

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What types are there?

Choosing the right card depends entirely on your needs: do you want it for digital subscriptions, for your child to learn how to manage their money, or for traveling abroad? Knowing the available categories will help you choose the option that best fits your lifestyle.

Here are the types of prepaid cards classified by their three main differences:

Physical and virtual

Choosing between one format or another depends on how you prefer to interact with your payments. While the physical card offers the usual tangibility, the virtual card bets on digital immediacy.

Card Type	Main Characteristics	Typical Use Cases
Physical (Plastic)	Standard material and dimensions card. Allows payments via chip, magnetic stripe or contactless and cash withdrawals at ATMs.	Purchases in physical stores, travel where you need cash, and payments at establishments without mobile technology.
Virtual (Digital)	Has no physical support; resides in your entity’s App. It consists of a card number, CVV and digital expiration date.	Exclusive online purchases, subscriptions (Netflix, Spotify) and mobile payments linked to Apple Pay or Google Pay.

Single-use and reloadable

Another fundamental distinction is the useful life of the card. While some are designed to accompany you in your daily expenses, others are born with the sole purpose of protecting a specific transaction and then disappearing.

Feature	Reloadable (Multi-use) Card	Single-use Card
Use	Can be used multiple times until its expiration date.	Used for a single purchase or transaction.
Reload	Allows adding funds unlimitedly as needed.	Does not allow reloads; once the balance is used up, it is deactivated.
Security	High (risk is limited to the loaded balance).	Maximum (the card data ceases to exist after payment).
Format	Available in both physical and virtual support.	Generally a virtual number generated by an App.
Ideal for…	Weekly expenses, travel and monthly subscriptions.	Purchases on unknown websites or one-time online payments.

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Closed (to one merchant) and open (Visa/Mastercard network)

The last classification depends on where you can spend your money. While some cards are limited to a single place, others offer you total freedom of movement anywhere in the world.

Card Type	Description	Scope of Use
Closed (Private)	Linked exclusively to a specific platform or brand. The stored money only has value within that company.	Only at the issuing merchant (e.g., gift cards from a clothing store or balance from a coffee App).
Open (Universal)	Backed by global networks like Visa or Mastercard. It is the most versatile category because it combines the security of prepaid with universal acceptance.	At any physical or online establishment in the world that accepts the network (e.g., Bitsa).

What is a prepaid card for in daily life

The prepaid card is not just a financial product, it is an organization tool. Below, you will see how it solves common situations and why it is the perfect ally for your daily peace of mind.

Situation	How the prepaid card helps you
Secure online purchases	Allows you to load the exact amount of a purchase at new or unknown stores. As it is not linked to your savings or payroll account, the risk to your main capital is zero.
Budget control	It is ideal for separating “leisure” money (dinners, outings, movies) from fixed bills. By seeing how the balance runs out in real time, it is impossible to spend more than planned.
Digital subscriptions	Centralizes streaming payments (Netflix, Spotify), software or gaming. This avoids surprise charges and keeps all your recurring expenses under control in one place.
International marketplaces	On platforms like AliExpress, Temu or Shein, it adds an extra layer of protection. If there is a data breach, attackers will not have access to your real bank account.
Online leisure platforms	Allows you to set an unbreakable limit. You reload your monthly budget and, once it runs out, you protect the rest of your personal and family finances.

How to reload and check the balance

To close the practical part of our guide, it is essential to know how to keep your card operational and what to do in case of unforeseen events. Management is 100% digital and designed so that you have control in seconds.

Action	Methods and Details
How to reload funds	You can add balance via bank transfer, direct deposit or linking another card. In advanced options like Bitsa, you can even reload using cryptocurrencies.
Balance and transaction inquiry	The fastest way is the mobile App (with real-time data), but you can also use the provider’s website, ATMs (if it’s a bank card) or even via SMS on some services.
Blocking and cancellation	If you lose the card or detect a strange charge, you can “deactivate it” instantly from the App. This freezes the balance immediately so no one else can use it.
Balance recovery	If the card is damaged, or you decide to cancel the contract, the remaining balance is usually returned to the originating account or via transfer to an account you provide.

Difference between prepaid card, debit card and credit card

It is very common to confuse these terms, but knowing their differences is the key to not paying extra fees and keeping your savings protected. The big difference lies in where the money comes from and what happens if you lose the plastic. Here is the definitive comparison to clear up all doubts:

Feature	Prepaid Card	Debit Card	Credit Card
Origin of money	Balance loaded in advance.	Available balance in your account.	Loan (credit line).
Linking	Does not need a bank account.	Mandatory to an account.	Linked to a credit line.
Spending control	Total (only what you reload).	Medium (everything in the account).	Low (risk of debt and interest).
Automatic charges	Generally not allowed.	Yes (bills and subscriptions).	Yes (bills and subscriptions).
In case of theft	Risk limited to the loaded balance.	Risk to the entire account balance.	Risk according to the credit limit.

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Very important, in today’s digital world, when you go to a bank or a platform like Bitsa, what they give you is a prepaid card that functions as a prepaid card. Therefore, to avoid confusing the reader with old technicalities, we unify them: both serve for you to decide how much money you “take out” of your main account to expose to the online world or daily spending.

Control and security in one click

The prepaid card has established itself as the ultimate tool for daily life. More than a banking product, it is a financial “firewall” that allows you to separate your money, control budgets and shop online without ever exposing your main account.

If you are looking for freedom without ties, Bitsa is the ideal option. It is a Visa prepaid card that combines universal acceptance with total flexibility: reload it via transfer, card or cryptocurrencies, and operate with total security without needing to link a traditional bank.