One hundred and fourteen million customers. Nubank — founded in a São Paulo apartment in 2013 — crossed 114.2 million customers by end-2024, making it the world’s largest neobank by customer count. For context, that is more customers than JPMorgan Chase’s entire US retail banking network.

Brazil’s traditional banks spent a decade trying to prevent this from happening. They failed spectacularly.

Latin America had approximately 200 million unbanked adults as recently as 2015. A full generation of adults — in Brazil, Mexico, Colombia, Argentina — was structurally excluded from formal financial services: no credit cards, no savings accounts, no easy money transfers, no insurance. Not because they didn’t want banking. Because traditional banks didn’t want them.

The traditional Brazilian banking model was built around four or five large institutions — Bradesco, Itaú Unibanco, Santander Brasil, Banco do Brasil, Caixa Econômica Federal — that operated through physical branches with high minimum balances, annual fees on basic accounts, and a culture of bureaucratic friction that made opening an account a half-day exercise in frustration. For low-income Brazilians, the implicit message was clear: the formal banking system is not for you.

What changed: smartphones, cheap mobile data, and a generation of fintech founders who looked at the 200 million excluded people and saw a US$100 billion+ addressable market rather than an unqualified credit risk.

David Vélez founded Nubank in 2013 after experiencing Brazil’s banking system first-hand as a foreign executive trying to open an account. The experience — weeks of bureaucracy, multiple in-person visits, forms in triplicate — prompted a simple question: why does a country with 200 million people tolerate a banking system this hostile to its users?

The product answer was the Nu Purple Card: a no-fee, no-annual-charge Mastercard credit card managed entirely through a smartphone app. No branch visits. No minimum balance. No paperwork beyond a digital KYC flow. Account opened in 5 minutes. Card delivered by mail within a week.

The economics that made this possible: Nubank’s customer acquisition cost was approximately US$8. Traditional Brazilian banks were spending US$200–300+ per acquired customer through branch networks, marketing, and sales staff. The digital-only model eliminated the cost structure that forced banks to impose fees, and the fee elimination became the product’s primary marketing message.

The waitlist built virality. Nubank launched with a referral system — you could only join by invitation from an existing member. The purple card became a social signal: if you had one, you were part of a new financial movement. This sounds like startup mythology, but the data confirms it: Nubank’s customer growth was driven by word-of-mouth, with minimal paid marketing, for the first four years of operation.

Nubank’s Brazil success created a template that has been replicated, with local variations, across Latin America.

Nubank’s regional expansion: Brazil (2013) → Mexico (2019, Neo Nu) → Colombia (2020). Revenue FY2024: US$11.5 billion (up 58% year-on-year). Adjusted net income FY2024: US$2.2 billion. First profitable year: 2023. NYSE listed (ticker: NU) since December 2021. Market cap fluctuates between US$40B and US$70B depending on macro conditions.

Mercado Pago: The fintech arm of MercadoLibre — Latin America’s dominant e-commerce platform. 57 million active payers. Total Payment Volume (TPV): US$74 billion (2023). Available in 18 countries. Full banking licence in Brazil, enabling savings accounts (earning above-market interest rates via the Reservas product), credit cards, and personal loans. Mercado Pago is the payments infrastructure for MercadoLibre’s marketplace — every transaction on the platform flows through Mercado Pago — but has expanded into standalone digital banking services that do not require MercadoLibre purchases.

The World Bank’s Global Findex database shows Brazil’s banked adult population growing from 70% in 2015 to 84% in 2024. That 14-point increase — representing approximately 30 million newly banked Brazilians — occurred primarily through digital bank accounts at Nubank, PicPay, and Mercado Pago rather than traditional banks.

The competitive field beyond the two leaders: Inter Bank (publicly listed on Nasdaq as INTR), C6 Bank (backed by Goldman Sachs), Ualá in Argentina, Koywe in Chile, Clara and Conekta in Mexico for B2B payments. The ecosystem has depth across 8–10 countries with differentiated players in each segment.

Inline math on Nubank’s unit economics: Average revenue per user (ARPU) FY2024 was approximately US$11/month across all 100M+ customers. That seems modest. But with a customer acquisition cost of US$8 and an average customer lifetime exceeding 5 years (churn is low once users adopt multiple products), the lifetime value calculation is US$11 × 60 months = US$660 LTV against US$8 CAC — an 82x LTV-to-CAC ratio. Traditional banks, with their US$300 CAC, require similar calculations before reaching profitability per customer.

The NSE options market equivalent: Latin American retail investors are not yet participating in equity markets at India’s scale — Brazil’s B3 exchange has approximately 5–6 million individual investors (CPF holders with brokerage accounts), compared to India’s 157 million demat accounts. But the same trajectory is beginning: Nubank launched Nu Invest (a brokerage arm), XP Investimentos has 4 million+ active brokerage clients, and the SIP-equivalent in Brazil — Renda Fixa (fixed income) and Tesouro Direto (direct government bonds) products marketed through apps — are growing rapidly.

The geographic expansion math: Mexico has 130 million people and approximately 37% formal banking penetration (Banco de México data, 2023). Nubank’s Mexico client base is approximately 8–9 million. The addressable unbanked in Mexico alone is approximately 50–55 million adults. This is why Nubank’s growth story is still in early innings despite 100 million global customers.

Here’s the uncomfortable number that every Latin American fintech bull needs to answer.

Brazilian consumer credit cards carry APRs of 300%+ at the regulated maximum (Banco Central do Brasil data). This is not a rounding error. A Brazilian who carries a Nubank credit card balance at the minimum payment rate faces annualised interest costs that would be criminal in most developed markets.

The reason this APR exists: Brazil has high inflation (historically), high default rates, a complex credit recovery legal system (creditors struggle to recover from defaulting debtors), and a regulatory framework that allows the market to price credit risk freely. In this environment, high-risk borrowers price as high-cost borrowers.

Nubank’s non-performing loan (NPL) rate — the percentage of loans overdue 90+ days — crept upward in 2023–2024 as Brazil’s higher-for-longer interest rate environment (Selic rate peaked at 13.75% in 2023) compressed household budgets and increased defaults. This is the recurring Achilles heel of LatAm fintech: user growth metrics look excellent until a macro tightening cycle reveals the credit quality of the expanded user base.

MercadoLibre’s Mercado Pago has similarly faced credit loss provisions increases in its BNPL (buy-now-pay-later) and personal loan segments during tighter macro conditions.

The LatAm neobank story is genuinely excellent when macroeconomic conditions support consumer spending and credit servicing. It shows stress when they don’t. The structural question — whether Nubank and its peers are building credit scoring systems sophisticated enough to price risk accurately across the full 200M+ customer population — remains open.

Nubank (NU) is listed on the NYSE and fully accessible via Tiger Brokers from Singapore. It is one of the few genuinely pure-play EM fintech stocks available on a major liquid exchange — most EM fintech companies are either privately held, listed on frontier market exchanges, or embedded within larger conglomerates.

MercadoLibre (MELI) is the LatAm tech bellwether — a US$80B+ market cap Nasdaq-listed company that serves as the broadest expression of Latin American digital economy growth. It encompasses e-commerce (market domination in Brazil, Argentina, Mexico), Mercado Pago (payments/fintech), Mercado Crédito (lending), and MercadoLibre Ads (digital advertising). Expensive relative to INDA or EWZ on a P/E basis, but has earned its premium through consistent execution.

For Singapore-based investors, NU and MELI together represent the most accessible expression of the LatAm fintech thesis on liquid, regulated exchanges. Tiger Brokers provides access to both as NYSE and Nasdaq listings.

Inline math on MELI versus EM peers: MELI’s 5-year revenue CAGR (2018–2023) was approximately 53%. Price appreciation followed: US$250 in 2019 to US$1,600+ at 2024 peaks. That’s a 6x return in 5 years on the LatAm digital economy thesis. Not every 5-year period will deliver this — but the structural argument (LatAm going through its “China 2015” moment) remains intact.

The neobank era in Latin America is not over — it is in the middle of its second act.

Act One was customer acquisition and financial inclusion: signing up the 200 million excluded and giving them a basic account. Act Two is monetisation and product deepening: converting basic account holders into credit customers, investment customers, and insurance customers. This is where unit economics either compound into something extraordinary or where credit losses reveal the quality ceiling of the expanded base.

The geographic frontier: Mexico (130M people, low banking penetration), Colombia (50M people), and eventually Peru, Ecuador, and Central America represent the next addressable markets. Nubank’s Mexico trajectory will be the most watched indicator of whether the Brazil model is replicable in markets with different regulatory and cultural dynamics.

The macro overlay: LatAm fintech companies correlate with USD/BRL and USD/MXN exchange rates in ways that directly affect USD-denominated returns. A strong US dollar cycle compresses LatAm stock prices in USD terms even when local currency performance is solid. EM investors in NU and MELI are always taking a view on LatAm currency dynamics alongside the fintech thesis.

The window when you can buy the world’s largest neobank at a reasonable multiple — before it is priced for perfection — is narrow. Nubank’s first profitable year was 2023. Its growth runway extends to 300M+ addressable users. Whether you get that at NU’s current market cap is a math question worth running.

Disclosure: Tiger Brokers is an affiliate partner. Opening an account via our link supports this publication at no additional cost to you.