What happened
Nu Holdings reported second quarter 2026 net income of 1.1 billion dollars on 13 August, a 49 percent increase on the same quarter last year and the first time the company has passed one billion dollars in a three month period. The shares rose nearly 12 percent in response, one of the largest single day moves among major financial stocks this year.
Gross revenue climbed 39 percent from a year earlier to 5.9 billion dollars, while net revenue topped 4 billion dollars for the first time. Net revenue is what remains after the cost of funding deposits and covering credit losses, so it is a far better measure of a bank underlying earning power than the headline top line.
Customer growth remains the engine. Nubank added roughly 4 million customers in the quarter to reach 139 million globally. In Brazil it now serves almost 118 million people, an extraordinary share of a country of around 210 million. In Mexico it reached 15.8 million customers, rising to 16 million by July, and in Colombia it passed 5 million.
The quality metrics improved alongside the scale. Average revenue per active customer reached roughly 17 dollars, up sequentially. The monthly activity rate expanded to 83.5 percent, with Brazil passing 86 percent for the first time. Risk adjusted net interest margin, which is the gap between what the bank earns on lending and what it pays on deposits after subtracting expected bad debts, hit a record 12.4 percent.
Why it matters
For years the open question about digital banks was whether they could ever earn the returns of a traditional bank without the branches, the legacy systems and the enormous cost base. Nubank has now answered it emphatically. A 12.4 percent risk adjusted net interest margin is roughly four times what a large European high street bank typically achieves.
The activity rate is arguably the more important number. Plenty of app banks can sign up customers with a slick onboarding flow and a cashback offer, then watch them sit dormant with 20 pounds in the account. A monthly activity rate above 83 percent means these are primary banking relationships, not secondary accounts, and primary relationships are where the profit lives.
There is a broader economic story here about financial inclusion. Large parts of Brazil, Mexico and Colombia were historically served badly or not at all by traditional banks, where account fees and branch requirements excluded lower income households. A digital model with near zero marginal cost per customer makes serving those people profitable rather than charitable, and 139 million customers is the result.
For investors in UK and European banks, the comparison is uncomfortable. Nubank is growing revenue at 39 percent a year with margins incumbents cannot approach, and it is doing so in markets that traditional banks had written off as structurally unattractive.
Explained simply
A traditional bank is a chain of shops that happens to sell money. A digital bank is a single piece of software that happens to have 139 million users, and software does not pay rent.
Consider what it costs a conventional bank to serve one more customer. There is a branch with a lease and staff, a call centre, a card printing operation and decades of legacy computer systems that need constant maintenance. Every new customer adds a little to all of that.
Now consider a digital bank. The app already exists. The servers are already running. Adding the ten millionth customer costs almost nothing beyond a card in the post and some regulatory checks. This is why the profit per customer, that roughly 17 dollars a month figure, can be modest while total profit is enormous.
The net interest margin is where the money is actually made. Nubank takes deposits from customers and pays them a certain rate, then lends that money out through credit cards and personal loans at a much higher rate. The 12.4 percent figure is the gap between those two, after setting aside what the bank expects to lose on loans that are never repaid.
That final adjustment matters enormously. A bank can post a huge margin simply by lending recklessly to people who will not repay, and the bill arrives eighteen months later. Nubank reporting a record risk adjusted margin means the margin survives after accounting for expected losses, which is the version that counts.
What it means for you
The direct read across for a UK reader is competitive pressure. Monzo, Starling and Revolut are running versions of the same model, and Nubank has just demonstrated how profitable it becomes at scale. That funds sharper savings rates, better foreign exchange pricing and more aggressive credit offers as they chase the same outcome.
It is worth checking whether your current account provider is passing on any of that efficiency. Several digital banks pay in the region of 3.5 to 4.5 percent on instant access savings pots inside the app, while many high street current accounts still pay nothing at all on balances. Moving an emergency fund of 10,000 pounds from a 0 percent current account to a 4.2 percent pot is worth roughly 420 pounds a year for around ten minutes of effort.
If you invest, note that Nu Holdings sits in most emerging market index funds and in some global trackers, so you may already own a slice of this result without knowing it. It is also a reminder that emerging market exposure is not only commodities and Chinese technology.
A word of caution on the credit side. A bank earning a 12.4 percent margin is largely earning it from credit card and personal loan interest. The customer paying that interest is funding the profit, so the lesson for individuals is to use these apps for the savings and payments features rather than the revolving credit.
The bigger picture
Nubank launched in 2013 with a single purple credit card aimed at Brazilians frustrated by branch banking. Thirteen years later it serves more than half the adult population of Brazil and earns more in a quarter than many established European banks. That is one of the fastest builds of a retail banking franchise in modern financial history.
The growth question now shifts to geography. Brazil is approaching saturation at almost 118 million customers, so the next phase depends on Mexico and Colombia, where the company is still early and where local incumbents are far better entrenched than they were at home.
Watch the credit loss provisions in coming quarters. Rapid lending growth always looks profitable before the loans season, and the true test of the model arrives when Latin American economies next slow. Until then, the direction of travel for banking in emerging markets looks decisively digital.
