How Square Credit Card Launch Will Impact Marqeta Stock Investors

• In October 2026, Marqeta announced it is powering Square Credit Card, Square's business credit card for sellers on the American Express Network. This consolidates Square's debit, prepaid, and credit programs on Marqeta's issuer processor.
• The deal highlights Marqeta's role in complex portfolio migrations and full program management, reinforcing its focus on commercial credit capabilities for large enterprises.
• We will now look at how Marqeta's expanded role in Square's American Express backed credit card program could influence its investment narrative.

Spot opportunities across the wider payments and fintech space by comparing Marqeta's American Express partnership with 19 high quality undiscovered gems that have similar infrastructure style potential.

Marqeta Investment Narrative Recap

To own Marqeta, you need to believe its issuer processor model can keep attracting large, complex programs and that usage based revenue can scale even if pricing pressure stays real. The Square Credit Card expansion fits that thesis by showcasing full stack credit, portfolio migration, and program management in a single integration for a large partner.

The main near term swing factor is whether new commercial credit wins and embedded finance deals can offset softer net revenue and gross profit guidance. Customer concentration and lower margin enterprise contracts still sit on the other side of the ledger, so this Square American Express work looks helpful but not thesis changing by itself.

The most relevant context for this Square American Express announcement is Marqeta’s push into larger embedded finance and commercial credit programs. Management has highlighted bigger enterprise deals and wallet linked credit as important drivers, and this partnership is a live operational example, spanning issuance, processing, underwriting, and rewards inside one platform.

For you as an investor, the interest is less about branding and more about execution and resilience. A scaled credit program that consolidates debit, prepaid, and card issuing on Marqeta tests portfolio migration tools, real time decisioning, and risk controls at volume. If these programs run smoothly, it can support the catalyst of stickier TPV while keeping an eye on margin pressure and customer concentration risk.

What The Square Credit Card Deal Means For Marqeta's Targets

The Square Credit Card build on the American Express network fits into an existing analyst framework for Marqeta that already assumes moderate growth rather than a moonshot. Forecasts point to revenue increasing by 12.1% a year over the next three years, profit margins moving from 1.5% today to 7.0%, and earnings climbing from US$10.4 million now to US$67.1 million by 2029, which is roughly a 6x step up in profit. Those same models assume the stock would trade on a 33.5x P/E multiple on 2029 earnings, compared with 187.4x on current earnings and above the 17.1x P/E cited for the wider US diversified financial peer group.

On the top line, analysts baking in US$954.7 million of revenue and US$67.1 million of earnings by 2029 are effectively saying Marqeta needs steady, compounding program wins and cleaner margins for that thesis to hold. The Square American Express card, with its mix of credit, rewards, underwriting flows and program management, is the kind of complex relationship that can support that story if it scales smoothly across the portfolio and does not compress margins more than expected.

At the same time, those projections sit alongside some firm constraints. Gross profit take rate has already eased toward roughly 10 basis points as larger and international contracts ramp, and management has guided Q3 2026 net revenue growth to 6% to 8% with gross profit up 5% to 7%. That context matters when you look at a model that leans on rising profitability over the next few years, since larger enterprise deals like the Square Credit Card program can bring both higher volume and tighter unit economics.

Customer concentration remains a key variable in that equation. The Square and Cash App ecosystem is still a very large slice of Marqeta's total processing volume, and external research has pointed to Cash App diversifying issuance across other providers. Readers should treat the Square American Express expansion as helpful evidence of deeper ties, while still recognising that a quicker than expected shift of existing programs to alternative or in-house solutions would challenge the assumed earnings ramp that analysts have mapped out to 2029.

Marqeta's analyst narrative points to US$954.7 million of revenue and US$67.1 million of earnings by 2029, built on 12.1% yearly revenue growth and an earnings increase of about US$56.7 million from US$10.4 million today.

Uncover why Marqeta's fair value indicates a 14% potential upside to its current price, which could narrow quickly if sentiment shifts.

Exploring Other Perspectives

One alternate angle to watch is the very optimistic take on Marqeta’s earnings power. The most bullish analysts were pencilling in US$1.0b of revenue and US$161.5 million of earnings by 2029, far above consensus, before this Square American Express news. That gap shows how widely views can differ. Use it as a prompt to explore multiple scenarios and decide which story you think this new deal could push closer to reality.

Explore 4 other Marqeta fair value estimates, including one that suggests as much as 48% upside from the current price!

The Verdict Is Yours

Disagree with existing narratives? Extraordinary investment returns rarely come from following the herd, so consider going with your own instincts.

• A great starting point for your Marqeta research is our analysis highlighting 2 key rewards that could impact your investment decision.
• See our latest analysis for Marqeta. The report includes a comprehensive fundamental analysis summarized in a single visual, the Snowflake, making it easy to evaluate Marqeta's overall financial health at a glance.

Looking For More Investment Ideas Beyond Marqeta?

If this Marqeta update has sharpened your thinking about payment infrastructure, it can help to widen the lens and compare it with other businesses that share some of the same quality, balance sheet strength, or income characteristics. The Simply Wall St Screener lets you quickly narrow the market to a smaller group of stocks that fit the kind of profile you care about most.

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