The air in São Paulo feels different today. It’s not just the crisp winter chill of a Brazilian August. It’s the hum of validation. Thirteen years after David Vélez bet that a branchless, tech-first bank could upend Latin American finance, that hypothesis is now a $1.1 billion quarterly fact. Nu Holdings Ltd., the digital bank we know as Nubank, didn’t just report earnings for the second quarter of 2026. It delivered a masterclass in scaling a financial ecosystem.
Let’s start with the headline number. A quarterly net income of $1.1 billion. For the first time in its history, Nubank has crossed the billion-dollar profit threshold in a single quarter. This isn’t a flash in the pan; it’s a 49% surge from a year ago and a 17% climb from just last quarter. The Return on Equity (ROE) stands at a staggering 33%. To put that in perspective, as of 2023, the average ROE for major U.S. banks hovered around 11-13%. Nubank is generating shareholder returns at nearly three times that rate, a figure that would make any legacy Wall Street CEO do a double-take.
This profitability is built on a revenue engine firing on all cylinders. Gross revenue hit nearly $5.9 billion, up 39% year-over-year. But the real story is in the mix and the margins. Net Interest Income (NII) grew 9% sequentially to $3.7 billion, but the Net Interest Margin (NIM) exploded, widening by 180 basis points to 22.9%. That’s an astonishingly high margin. It reflects a deliberate and confident strategic shift. Management has been telegraphing for quarters its move into higher-risk, higher-return unsecured lending segments. This quarter shows that move paying off handsomely. Even after accounting for the cost of credit, which declined 9% quarter-over-quarter to $1.7 billion due to normal seasonal improvements, the Risk-adjusted NIM expanded by 290 basis points to 12.4%. This tells us Nubank isn’t just growing recklessly; it’s pricing risk with surgical precision.
The foundation for this credit “superpower,” as the company calls it, is customer primacy. With 139 million global customers—118 million in Brazil alone—Nubank has achieved a level of engagement that is the envy of the industry. The monthly activity rate in Brazil surpassed 86% for the first time. Think about that. Nearly nine out of ten customers are using their Nubank account actively every single month. This isn’t a dormant savings account; it’s a primary financial relationship. And that relationship generates a torrent of high-quality, proprietary data. Customers who designate Nu as their primary bank show delinquency rates roughly half the portfolio average. This creates a virtuous cycle: better data leads to better underwriting, which allows for more profitable lending, which attracts and retains more core customers.
This brings us to the quiet force multiplier beneath it all: NuFormer. The company’s proprietary foundation model for financial behavior is no longer a science project. It’s in production, powering underwriting for credit cards in Brazil and Mexico and unsecured lending in Brazil. The latest iteration has quadrupled context length and training speed while cutting operational costs. Beyond credit, AI agents now handle over 60% of customer support conversations in Brazil at or above human parity. This isn’t just about cost savings; it’s about scaling intelligence. Every customer interaction, every transaction, feeds the model, making the entire system smarter and more efficient. It’s a structural advantage that grows wider with each passing quarter.
The expansion narrative is equally compelling. In Mexico, Nubank has completed its transformation from a credit-led fintech to a full-scale digital bank, now the largest in the country with 16 million customers. The strategic patience is noteworthy. Deposits in Mexico declined modestly this quarter as part of a deliberate “deposit-optimization strategy,” improving the cost of funding while maintaining a conservative loan-to-deposit ratio of just 35%. They are playing the long game, building a sustainable funding base before unleashing full lending capacity. The company notes that Mexican customer cohorts are monetizing earlier than their Brazilian counterparts did at the same stage, with an Average Revenue Per Active Customer (ARPAC) of $12.3 versus $5.6 in early-stage Brazil.
Back in its home market, Nubank is executing a sophisticated two-tiered strategy. It already dominates the mass market and is now systematically moving upmarket. The recent launch of “Croma” for its “Super Core” customers is a direct assault on the premium segment, offering enhanced credit and benefits to capture an even larger share of wallet. Meanwhile, its small business segment continues to grow quietly, serving more SMEs than any other financial institution in Brazil.
Of course, risks remain. The 90+ day non-performing loan (NPL) ratio increased by 35 basis points to 6.9%, which the company attributes largely to the seasonal migration of early delinquencies from Q1. The efficiency ratio also ticked up to 19.5%, driven by real estate shifts and continued international investment. These are not red flags in the context of explosive growth, but they are metrics to watch closely. The true test will be how credit quality holds as the global economic cycle eventually turns.
What we are witnessing is the maturation of a blueprint. Nubank has proven that its model works in Brazil. It is now proving it can export that model, adapting it to the nuances of Mexico and Colombia. It has moved beyond customer acquisition to deep monetization, and beyond basic banking to becoming an AI-powered financial platform. The $1.1 billion profit milestone is less an endpoint and more a checkpoint on a much longer journey. The hypothesis is not just proven; it’s being scaled across a continent.
- Quarterly net income of $1.1 billion
- Gross revenue hit nearly $5.9 billion
- Net Interest Margin expanded to 22.9%
- Over 139 million global customers
- Monthly activity rate in Brazil surpassed 86%
- NPL ratio increased to 6.9%
| Metric | Value |
|---|---|
| Quarterly Net Income | $1.1 billion |
| Gross Revenue | $5.9 billion |
| Return on Equity (ROE) | 33% |
| Net Interest Margin (NIM) | 22.9% |
| Customer Base in Brazil | 118 million |
| Non-Performing Loan (NPL) Ratio | 6.9% |
Sources: Nu Holdings Ltd. Q2 2026 Earnings Release; Federal Reserve Economic Data (FRED) on historical bank ROE; Banco Central do Brasil regulatory updates; International Monetary Fund (IMF) reports on Latin American financial inclusion.
