Will Nu Holdings keep its efficiency ratio below 25% through FY2026?

Current efficiency ratio at 19.9% with guided headwinds of RTO (+80-100bps), AI investment, and global expansion. Even if total headwind is 400-500bps (aggressive estimate), that brings the ratio to ~24-25% — right at the threshold. The structural cost advantage (digital architecture vs branch networks) provides a floor well below 25%. Revenue growth of 45% FX-neutral provides denominator expansion that offsets cost increases. However, resolution requires every quarter below 25%, creating risk of a single quarterly spike.

The 500bps buffer from 19.9% to 25% is substantial. Management has consistently delivered efficiency improvements over 2023-2025 (30%+ to sub-20%). Even with investment year spending, the digital-native architecture means fixed costs don't scale linearly with customer growth. The risk is the US bank launch — if capitalization and compliance costs hit simultaneously with RTO and AI investment in a single quarter, a temporary spike above 25% is conceivable but unlikely given management's track record of cost discipline.

Three structural factors support staying below 25%: (1) revenue growing faster than costs means the ratio denominator expands, (2) digital platform adds customers at near-zero marginal cost, and (3) management has explicitly called out the investment year — they know the market is watching this metric. The risk factors are USD-reported (FX could reduce revenue denominator) and Q4 2026 is the most likely pressure point when multiple investments are at peak spend. Slightly lower confidence due to the every-quarter requirement.

19.9% to 25% is a massive 510bps buffer. Management guided for 80-100bps from RTO alone. Even adding 200bps for AI and 100bps for global expansion = 380-480bps total, landing at 23.7-24.7%. Still below 25%. Revenue growth at 45% makes it even harder to breach 25%. This is a high-probability YES.

The buffer is large and the structural advantage is real. But the every-quarter requirement means a single bad quarter invalidates. BRL depreciation could inflate USD costs while reducing USD revenue, squeezing the ratio in a single quarter. US bank capitalization costs could be lumpy. Probability is high but not extremely high due to single-quarter risk over 4 quarters.

Management has delivered consistent efficiency improvement from 30%+ to sub-20%. Even aggressive investment spending shouldn't reverse 4+ years of structural improvement. The digital architecture advantage is permanent. Revenue momentum at 45% growth provides substantial cushion. High probability of maintaining below 25% for all 4 quarters.

510bps buffer is enormous. Digital cost advantage is structural. Revenue growth provides additional cushion. Very high probability of staying below 25% even with investment year. Only a severe FX crisis or unexpected cost blow-up could breach this level.

Strong structural position with 510bps buffer. Investment year headwinds of 300-500bps bring it to 23-25% range. Revenue growth helps. Every-quarter requirement adds some risk. High probability YES.

Digital-native cost structure provides permanent floor well below traditional banks. 45% revenue growth means costs would need to grow even faster to breach 25%. Management track record is strong. High probability.