Payments4 min readUpdated October 15, 2026

What Is a Debit Card?

Debit card definition, with the economics view: whose money it spends, debit vs credit vs prepaid, US and EU interchange caps, and debit routing rules.

Nick Bonnassies, CMO at Tagada · checked against 7 sources

Article summary

TL;DR

A debit card is a payment card that draws money directly from the cardholder's bank account, usually a checking account. No credit is extended: if the funds are not there, the payment is usually declined. In economics, the card itself is not money. It is a way to spend demand deposits, which the Federal Reserve counts in M1.

Visa defines a Debit Card as a Visa Card linked to a demand deposit, checking, current or savings account held at a financial institution.
In the US, unauthorized debit card use falls under Regulation E (up to $50, $500 or more if reported late). Credit cards fall under Regulation Z (up to $50).
Debit interchange is capped by law: $0.21 + 0.05% (+ $0.01 fraud adjustment) for large US issuers, 0.2% of the transaction in the EU.
Regulation II requires every US debit card to be processable on at least two unaffiliated networks, and lets the merchant choose the route.

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On this page

A debit card looks like a credit card and works at the same checkouts. The difference is whose money moves.

What is a debit card?

A debit card is a payment card that spends money already in the cardholder's bank account. Visa's rulebook defines it this way:1

Debit Card: A Visa Card linked to a demand deposit account, checking account, current account, negotiable order of withdrawal account, or savings account held at a financial institution, or a debit account or equivalent as defined under applicable laws or regulations.

Visa Core Rules and Visa Product and Service Rules, April 2026, Glossary, p. 851

The economics definition. The card is not money. It is an access device for bank deposits. The Federal Reserve's M1 measure of the money supply includes "demand deposits at commercial banks" and other checkable deposits.2 A debit card payment moves part of that M1 from the buyer's bank to the seller's bank. A credit card payment, by contrast, creates a loan.

Debit vs credit vs prepaid card

	Debit card	Credit card	Prepaid card
Whose money	The cardholder's bank deposits	The issuer's, repaid later	Money loaded on the card in advance
US law on unauthorized use	Regulation E: up to $50 if reported within 2 business days, up to $500 after, more after 60 days from the statement	Regulation Z: up to $50	Regulation E, with prepaid-account rules (12 CFR 1005.18)
US interchange	Capped for issuers with $10 billion or more in assets	Uncapped by federal law	Reloadable general-use prepaid cards can be exempt from the cap
EU interchange	Capped at 0.2%	Capped at 0.3%	Counted as debit: 0.2% cap

Sources: Regulation E 1005.6 and 1005.18,3 Regulation Z 1026.12,4 Regulation II 235.3 to 235.5,5 Regulation (EU) 2015/751, which defines a debit card transaction as a card payment "including those with prepaid cards" (article 2) and caps it at "0,2 % of the value of the transaction" (article 3).6

The US debit cap is $0.21 plus 0.05% of the transaction (235.3), plus up to $0.01 for issuers that meet the Fed's fraud-prevention standards (235.4).5 On a $50 sale, that is $0.235, plus $0.01 if eligible (illustrative). For how this cap reaches your statement, see pass-through pricing.

Visa Debit vs PIN debit networks

A US debit card often carries two brands: Visa or Mastercard, and a PIN debit network. Checkout.com, for example, routes PINless debit over Star, Accel, NYCE and Pulse.7 PIN debit usually runs as a single message transaction: approval and debit happen together. Read more about the PIN itself. In Canada, the domestic debit network is Interac.

Regulation II makes this dual-network setup mandatory:5

An issuer or payment card network shall not [...] restrict the number of payment card networks on which an electronic debit transaction may be processed to less than two unaffiliated networks.

12 CFR 235.7(a)(1), Regulation II, eCFR

Section 235.7(b) adds that no issuer or network may inhibit the merchant's ability "to direct the routing of electronic debit transactions" over any network that can process them.5

What it changes for an online merchant

Lower cost on regulated cards. Debit from large US banks and EU consumer debit carry capped interchange. Card-by-card numbers are in our guide to interchange fees.
Honor all cards, with exceptions. Visa merchants must accept all Visa cards. In the US, Canada and Australia, a merchant may decline certain categories of domestically issued Visa products (1.5.4.2).1
Disputes still happen. A Visa Debit card is a Visa Card, so Visa dispute rules apply. Your side of it is a chargeback.
Holds hit real money. An authorization on a debit card reduces the customer's available balance. See pre-authorization holds.
Business cards. Debit cards issued to companies belong to the commercial card family. Their rules are on that page.

How Tagada helps

Payments that follow the card network rules

Tagada follows Visa and Mastercard rules and the laws that apply to payments.

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Updated on October 15, 2026

Nick Bonnassies

CMO at Tagada

CMO at Tagada. Before Tagada, Nick built direct-to-consumer brands that generated over $115M in sales, raised over $25M in crowdfunding and sold two of them. He also works as a fractional CMO on marketing operations and AI systems.

Frequently asked questions

What is a debit card in economics?

In economics, a debit card is a payment instrument, not money. The money is the deposit in the bank account behind the card. The Federal Reserve counts demand deposits and other checkable deposits in M1, the narrow money supply. Paying with a debit card moves those deposits from the buyer's bank to the seller's bank. A credit card is different: it creates a loan that is repaid later.

Is it spelled "dabet card" or "debat card"?

Neither. The correct spelling is "debit card". Debit is an accounting word for an amount taken out of an account, which is what the card does to the cardholder's bank balance.

What is the difference between a debit card and a credit card?

A debit card spends money you already have in your bank account. A credit card spends the issuer's money, which you repay later, often with interest. In the US, the laws also differ: unauthorized debit card use falls under Regulation E, where your loss can exceed $50 if you report late, while credit card liability is capped at $50 under Regulation Z.

Can a merchant choose how a debit card payment is routed?

In the US, yes. Regulation II requires issuers to enable at least two unaffiliated networks on each debit card, such as Visa and a PIN debit network, and forbids issuers and networks from stopping the merchant from directing the routing. Which route is cheaper or approves more often depends on your processor and its network connections.

Sources

Checked October 15, 2026

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