What ISOs Can Learn from Fiserv’s Q3 Miss
Fiserv’s Q3 2025 earnings call was rough and not just for investors. From an operations standpoint, it’s a case study every ISO can learn from.
Fiserv reported just 1% organic revenue growth this quarter, with adjusted EPS (earnings per share) down 11% year-over-year. They cut full-year guidance to 3.5 – 4% growth and $8.50 – $8.60 EPS, after forecasting closer to 10% earlier in the year. The market’s reaction was brutal, the stock dropped nearly 40% in a day.
Underneath those numbers are lessons that hit home for growing payments companies and ISOs trying to scale sustainably. Here’s what I took away:
1. Forecast from the ground up.
Fiserv’s big miss shows what happens when forecasts are too top-down. For small ISOs, build projections from real merchant data, weekly approvals, activations, and attrition, not wishful thinking. You can’t fix what you can’t see.
2. Diversify your book early.
Fiserv pointed to slowing growth in the Latin American Market, a large cross boarder newer area for them, as a key drag. Clover’s underperformance and pricing restructure really hurt them as well. For a smaller ISO, the same thing happens when one vertical like restaurants or e-commerce makes up most of your portfolio. Spread risk by industry, geography, and processor.
3. Document processes before scaling.
Fiserv launched its “One Fiserv” plan; great in theory, light on details. As you grow, write down every repeatable process now like boarding, support, chargeback handling. When you start adding staff, you’ll scale consistently instead of reacting to chaos. Proactive instead of reactive.
4. Communicate early and clearly.
Fiserv’s investors and employees were blindsided. In an ISO, that could be your agents, processors, or merchants. When something changes like pricing, funding delays, or support issues, communicate before they find out on their own. Communication builds trust and trust is the foundation of relationships.
5. Spend where it counts.
Fiserv spent over $5 billion on stock buybacks while growth slowed. For a smaller ISO, that’s the equivalent of pouring money into branding while back-office ops lag. Reinvest in automation, better CRM tools, staff and training. Short-term optics is not how you succeed.
6. Make performance visible.
Fiserv’s slowdown didn’t appear overnight. A tighter handle on metrics could have flagged it earlier. As a smaller operator, track your KPIs weekly such as: merchant churn, funding errors, equipment failures, tickets resolved etc… Fast visibility means fast course correction.
7. Stay close to the customer.
Fiserv lost touch with the ground-level signals, something smaller teams still have as a superpower. Keep talking to merchants and agents. They’ll tell you where friction is building before the data does. Listen to your customers and don’t be afraid to pivot when you see a need. At Jupiter Payments we have always said, and will always live by a golden rule our CEO, Colton Partlow, set when we established. “No one can service and support our customers and agents better than we can”.
Fiserv’s stumble wasn’t about one bad quarter, it was about operational drift. ISOs can avoid that by keeping forecasts honest, communication clear, and investments focused on execution. Im sure after this call Fiserv will pivot as they have share holders to answer to, but this can teach everyone a lesson or two. Growth doesn’t hurt a business; losing sight of the fundamentals does. When you combine a clear plan, grounded projections, and a team that executes with discipline, growth takes care of itself.
Written by: Vickie Partlow, VP of Operations
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Sources:
• Fiserv Q3 2025 Earnings Release – Investors.Fiserv.com
• PYMNTS.com: Fiserv Slashes Outlook, Promises Revamp to Close Competitive Gaps
• GuruFocus: Fiserv Inc. Q3 2025 Earnings Call Highlights