Jan 2026
Why Card-on-File Matters for Credit Unions
Credit unions have long competed on member service, but the battleground is shifting. Today the card that wins isn't always the one with the best rate — it's the one stored on the most merchant sites. Card-on-file automation is how credit unions are fighting back.
The Competitive Gap
Large banks and neobanks have invested heavily in digital tools that make their cards the default payment method across online merchants. Credit unions, often working with smaller technology teams and tighter budgets, have historically lacked the tools to compete on this front. Yet a PYMNTS/Velera study found that credit unions achieve a 53% top-of-wallet conversion rate among SMBs — beating digital-only banks at 42%.
The result is a growing interchange revenue gap. When a member's big-bank card is stored on Amazon and their credit union card is not, every Amazon purchase generates interchange income for the big bank. Multiply that across Netflix, Uber, DoorDash, and dozens of other subscription and e-commerce services, and the revenue impact is substantial.
Why Card-on-File Is the New Top of Wallet
The concept of top of wallet has evolved. It used to mean the card at the front of a physical wallet. Now it means the card stored as the default payment method on digital platforms.
Consider the numbers: the average consumer has card-on-file relationships with 10–15 merchant sites. Fewer than 10% of consumers proactively change a stored payment method. Once a card is stored, it tends to stay — generating recurring interchange income with every transaction.
For credit unions, this creates both a risk and an opportunity. The risk: losing transaction volume to competitors who get their cards stored first. The opportunity: using automation to level the playing field.
How Credit Unions Are Using Card-on-File Automation
Marketing-Led Campaigns
Many credit unions start with marketing-led campaigns that require no digital banking integration. Using email, SMS, or direct mail, the credit union invites members to store their card on popular merchant sites through a simple, branded experience. This approach can launch in weeks and delivers results immediately.
Digital Banking Integration
Credit unions with more mature digital platforms embed card-on-file placement directly in their digital banking app. Members see a list of popular merchant sites and can push their credit union card to any of them with a tap. This creates an ongoing engagement touchpoint, not just a one-time campaign.
New Card Issuance
The most forward-thinking credit unions pair card-on-file placement with new card issuance. When a member receives a new debit or credit card, a QR code on the card carrier launches an instant placement flow. The card is stored on merchant sites before the member has even made their first purchase.
Real Results: The MSUFCU Story
Michigan State University Federal Credit Union (MSUFCU) partnered with Strivve to deploy card-on-file automation for their member base. The results demonstrated that credit unions can achieve the same card-on-file penetration as large banks when they have the right tools.
Read the full MSUFCU case study to see the measurable impact on card-on-file placements and member engagement.
The Business Case for Credit Unions
The financial case for card-on-file automation is straightforward:
- 5–40X ROI — Strivve customers report strong returns driven by incremental interchange revenue from new card-on-file placements
- Pay for success — Pricing is based on successful placements, not attempts. If the card isn't stored, the credit union doesn't pay
- No heavy IT lift — Marketing-led campaigns require no integration with digital banking platforms
- Member retention — Members with more card-on-file placements have deeper relationships with their credit union and are less likely to leave
Getting Started
Credit unions of any size can implement card-on-file automation. The fastest path is a marketing-led campaign using CardLinks Engage, which requires no technical integration and can be live in weeks. For credit unions ready for a deeper integration, CardSavr embeds the experience directly in digital banking.
The credit unions that act now will capture card-on-file positions before their competitors do. In a world where the stored card wins, waiting is the most expensive option.