GoKawiilHarvard study finds credit card rewards shift $9.2B a year to wealthy shoppers
A Harvard Business School analysis led by Professor Mark Egan finds that interchange fees baked into retail prices generate about $9.2 billion annually in net rewards for affluent credit card users, while cash and debit customers pay the same higher prices but receive little or none of that money back. Across the broader economy, the researchers estimate roughly $30 billion moves each year from cash and debit users to credit card users at the same stores.
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Because merchants set uniform prices regardless of payment method, the system effectively taxes lower-income shoppers who rely on cash or debit to subsidize rewards enjoyed by wealthier cardholders. Egan's team says the scale of this transfer rivals major government redistribution programs like the Earned Income Tax Credit, making it a hidden but significant driver of economic inequality.
- Interchange fees embedded in retail prices create a $9.2B annual subsidy favoring premium credit card users.
- Cash-paying customers effectively face a 26% higher cost than rewards-card users at the same merchants.
- Researchers say the $30B wealth transfer rivals the scale of programs like the EITC and unemployment insurance.
I Will Teach You to Be Rich" by Ramit Sethi — If this research made you rethink how you pay for everything, this book is a practical guide to credit cards, rewards optimization, and automating your money. It walks through choosing cards and using them strategically instead of leaving value on the table. A useful read for anyone who realized they've been on the losing side of the swipe.
See I Will Teach You to Be Rich" by Ramit Sethi on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: library.hbs.edu, 2026-08-25
Published there as: “Credit Card Rewards Became a $9.2B Wealth Transfer”
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