Fintechs Are Winning the Primary Banking Relationship. What Comes Next?

For banks and fintech companies, winning a customer's primary checking account is about more than acquiring another user. It means becoming the financial institution or platform that customers rely on for their everyday financial activity.

New research from J.D. Power suggests that online banks and fintechs are strengthening their position in this competition, particularly among Millennials and Gen Z. But the findings raise a broader strategic question: as digital-first providers capture more primary banking relationships, how should they structure the banking infrastructure supporting that growth?

The answer involves more than customer experience. It extends to banking partnerships, operating economics, regulatory responsibilities and potentially the ownership of banking capabilities.

The numbers behind the shift

According to the 2026 U.S. Millennial & Gen Z Checking Satisfaction Study, released on September 29, Millennials and Gen Z account for 67% of new primary checking accounts in the United States.

Online banks and fintechs currently represent 20% of existing primary checking relationships among these generations. However, they account for 28% of newly opened accounts within the same customer segments.

This difference suggests that digital-first providers are attracting a larger share of new relationships than their share of the existing customer base.

Satisfaction scores reinforce the competitive picture.

Among Millennials, online banks and fintechs achieved an average satisfaction score of 699 out of 1,000, compared with 672 for national banks and 617 for regional banks.

For Gen Z, online banks and fintechs achieved an average score of 701, also outperforming national and regional banks.

The study surveyed 23,386 U.S. adults during June and July 2026.

As Banking Dive reported on October 9, younger customers particularly value protection against unexpected fees, timely account information and tools that help them manage their finances.

The implication is not simply that younger consumers prefer mobile applications. They increasingly expect their primary banking relationship to provide practical financial control.

Customer experience is becoming a banking proposition

Traditional discussions of digital banking often emphasize convenience, onboarding speed and application design.

The J.D. Power findings point toward a more fundamental distinction.

Customers value knowing what money is available, understanding what transactions will cost and avoiding unexpected financial disruptions.

Real-time balance visibility, fee predictability and proactive communication are therefore not merely interface features. They shape the customer's perception of reliability.

This matters because banking relationships depend heavily on trust.

A provider that consistently helps customers understand and manage their money may become more relevant to their financial lives than one offering a broader product catalogue without the same clarity.

There is also an important lesson for established banks.

J.D. Power found that 14 of the study's 32 key performance indicators depend on customers' awareness of available features. In other words, improving satisfaction does not always require building entirely new capabilities.

Sometimes the opportunity lies in communicating existing functionality more effectively.

Winning customers is different from owning the banking relationship

For fintech companies, strong customer satisfaction creates an opportunity to deepen engagement. But it also introduces an infrastructure question. A fintech may control the customer interface while relying on a regulated banking partner for account provision, deposit infrastructure and certain operational or compliance functions.

These arrangements can allow fintech companies to develop customer-facing products without immediately establishing a fully owned banking infrastructure. However, the structure of the partnership becomes increasingly important as the business scales.

The distribution of responsibilities, access to customer and transaction data, operational resilience, payment capabilities and the economics of the relationship can influence the sustainability of the business model.

The relevant question is not whether every successful fintech should become a bank. It is whether the infrastructure supporting customer growth remains appropriate for the company's strategy, risk profile and long-term economics. Different fintech business models may require different answers.

Banking partnerships become strategic assets

As more customers choose digital-first providers for their primary accounts, banking partnerships can become central to competitive positioning.

A fintech's ability to deliver predictable account functionality depends partly on the capabilities and reliability of its banking infrastructure.

For banks, partnerships can provide access to customer segments and distribution channels that may be difficult or expensive to reach independently.

But partnership structures require careful consideration.

Commercial terms, operational dependencies, compliance responsibilities and the allocation of risk can become increasingly consequential as transaction volumes and customer relationships grow.

This creates a strategic challenge for both parties.

Fintechs need banking partners whose capabilities can support their product ambitions. Banks need partnership models that create sustainable economic value without compromising governance and control.

For companies evaluating banking partnerships, correspondent banking arrangements or broader financial infrastructure strategies, these considerations should be addressed before customer growth creates additional operational complexity.

Could stronger fintech relationships influence M&A strategy?

The growing importance of primary banking relationships may also affect how banks and fintech companies evaluate acquisition opportunities.

A fintech with an engaged customer base may offer attractive distribution capabilities, customer relationships and digital product expertise.

A bank may offer regulated infrastructure, established operating capabilities and access to additional financial services.

Combining these strengths can be strategically appealing.

However, customer satisfaction alone does not establish acquisition value.

Any transaction would still require assessment of customer retention, revenue quality, funding economics, regulatory constraints, technology integration and operational risks.

The distinction is important: the J.D. Power study measures customer satisfaction and banking preferences. It does not establish that fintech acquisitions will increase or that acquiring a bank is the optimal strategy for digital-first providers.

Nevertheless, the research provides useful context for understanding why primary customer relationships may become increasingly relevant in banking and fintech M&A discussions.

The next competition is about sustainable relationships

The findings highlight an important change in the competitive environment.

Online banks and fintechs are demonstrating that transparent pricing, immediate information and practical financial management tools can contribute to stronger customer satisfaction.

Yet the ability to attract customers is only one part of the banking business.

Long-term success also depends on the infrastructure, economics and governance required to serve those customers reliably.

For fintechs, that may mean strengthening banking partnerships, investing in operational capabilities or reconsidering which parts of the banking value chain they need to control.

For established banks, it may mean improving how existing capabilities are delivered and communicated while reconsidering the role of fintech partnerships in their distribution strategies.

The next phase of competition will not be determined solely by who offers the best digital experience.

It will also depend on who can support that experience with a sustainable banking model.