A new customer opens a checking account. Maybe a savings account too. On paper, that looks like a win. Relationship established. Box checked. But here’s the uncomfortable truth most banks and credit unions already know: that’s not the whole story. Because the real question isn’t whether you just acquired a new customer, it’s how much of them you actually have.
That’s where share of wallet comes into play.
Their auto loan? With a competitor.
Their credit card? Fintech app.
Their mortgage? A different institution entirely.
What looks like a full relationship is often just a sliver of their financial life. And those missing pieces are costly.
So, what is share of wallet?
At its simplest, share of wallet means the percentage of a customer’s total financial activity that lives with you.
Not just accounts opened. Not just loans booked. But the full picture—deposits, lending, payments, and everyday financial behavior.
When banks and credit unions ask what is our share of wallet with a particular customer, they’re really asking are we the primary financial institution or just one stop among many?
In today’s market, that distinction is everything.
Gen Z is a perfect example. Around 60% spread their finances across multiple providers, often juggling two banks and multiple digital wallets. A significant share say they’re open to switching their primary institution within months. And one-third of Gen Z and millennials have already changed FIs in the past year in search of better value.
That’s not churn. That’s fluidity.
Why share of wallet has become a growth obsession
For years, growth was equated to more new accounts. But new customer acquisition alone is expensive and increasingly inefficient.
Today, bank marketers report spending 33.7% of their budget on new customer acquisition, compared to just 22.9% on existing customer retention. That imbalance is hard to ignore, especially when existing customers are already 5–10x more likely to respond than a new prospect.
So the question becomes obvious: why spend so much chasing new relationships when so much opportunity is sitting inside the relationships you already have?
Many customers hold less than half of their financial products with their primary bank. That means the majority of revenue potential isn’t outside your reach. It’s just underutilized.
That’s exactly why share of wallet has become such a central focus for growth teams.
When you start asking what is share of wallet across your portfolio, you’re really exposing the gap between relationship and reality.
Increasing wallet share translates directly into:
- More products per customer
- Higher lifetime value
- Stronger retention
- Lower cost of growth
Most institutions already have what they need to act. The data is there. The signals are there. The opportunity is there. What’s missing is the connection between them.
Closing the gap between knowing and growing share of wallet
Across MeridianLink® Opening and Consumer, our Share-of-Wallet module brings deposit and loan origination data together with marketing automation and business intelligence in a single, connected platform. Instead of scattered signals across different systems, institutions gain a clearer view of the full relationship.
The Share-of-Wallet module surfaces external loans, credit cards, and deposit accounts present in a customer’s financial life, then helps you prioritizes the moments most likely to convert—such as refinancing, balance transfers, or debt consolidation. From there, you can easily launch omnichannel campaigns, execute targeted cross-sell, and track performance.
Our customers are quickly identifying where relationships exist outside the institution and using those insights to drive timely, relevant cross-sell and refinance conversations that directly align to customer need. That shift creates a more intentional approach, where opportunities are discovered earlier, outreach is more relevant, and relationships are given the attention they need to grow.
That’s what MeridianLink is built to support. We have the solutions to help your institution move from understanding what is share of wallet to actually growing it.
