What is Debit Card?

A debit card provides electronic access to the funds in a linked checking (or sometimes savings) account. When the cardholder makes a purchase, the transaction amount is deducted from the account balance—typically within one to three business days for PIN-based transactions and immediately for signature-based transactions. Unlike a credit card, a debit card does not extend credit; the cardholder can spend only what is available in the linked account, unless they have opted into overdraft coverage.

Federal Reserve Regulation E (implementing the Electronic Fund Transfer Act) governs debit card transactions. Key protections include: limited liability for unauthorized transactions if the cardholder reports the loss within two business days (maximum $50 liability), a requirement that banks investigate reported errors within 10 business days, and the prohibition on overdraft fees for ATM and one-time debit card transactions unless the consumer has affirmatively opted in.

Debit cards do not build credit history because they do not involve borrowing. They function purely as an access device for the cardholder’s own deposited funds. The CFPB recommends debit cards for consumers who want the convenience of card payments without the risk of accumulating revolving debt.