A credit card is worth it if its benefits (rewards, cashback, interest-free installments or insurance) outweigh the cost of its annual fee, and if you're able to be a 'full payer'—that is, pay off the total balance before the due date to avoid generating interest.
Key points for evaluating a card:
- Total Annual Cost (CAT): Compare the average CAT. The lower it is, the less an unexpected financing situation will cost you.
- Fees and Annual Charge: If the card charges an annual fee, calculate whether the cashback or points you'll earn cover that cost.
- Interest rate: Check the applicable rate in case you don't pay off the full balance.
- Protection benefits: Look into whether it offers purchase insurance, extended warranty or fraud protection.
Conclusion: If you pay only the minimum each month or spend more than you earn, no credit card will be worth it, since the interest will eat up your income.


Muy útil el enfoque del CAT y la anualidad; ayuda a no fijarse solo en las recompensas. Me parece clave ser totalero para que la tarjeta realmente convenga.
Qué buen resumen, muy claro y práctico. Antes no había pensado en comparar seguros y beneficios contra el costo real de la tarjeta.
Me llevo una idea muy simple: si pago el saldo completo, una tarjeta con cashback puede salir muy rentable. ¡Gracias por compartir estos tips!