Why banks pay you to use their credit cards
Summary
Patrick McKenzie explains the complex economics of credit cards, detailing how issuers profit through net interest, interchange fees, and marketing contributions rather than just lending. He analyzes how cross-subsidization and regional regulatory differences shape card rewards and profitability in the US, Europe, and Japan. The episode also covers the mechanics of debit cards and discusses the potential consequences of proposed APR caps on consumer credit.
Topics discussed
Intro: Listener question on credit card insurance
Payments complexity and the credit card bundle
Bundling, unbundling, and cross-subsidization
Revenue levers: Net interest, interchange, fees
Net interest: How credit cards facilitate lending
Loan origination vs. holding and securitization
Interchange fees and the merchant relationship
US market: Business travelers and rewards competition
Global differences: Europe caps and Japan's high fees
Fees: Account, usage, and regulatory pressure
Marketing contributions and data monetization
Debit cards and the Durbin exemption
Sponsor: Mercury Spend for expense management
Sponsor: Granola AI for meeting notes
Postscript: Interchange bidding down credit costs
Impact of proposed APR caps on customer segments
Case study: 1st Republic's low-rate loan strategy
Other strategies: Cash App low-balance loans
Conclusion and call to action
Listen ad-free on Castria