Washington attacks Pix while the dollar already wins in Brazil

The US will impose a 25% Section 301 tariff on most Brazilian goods starting July 22, and for the first time it's using that trade authority against a country's domestic payment system rather than IP theft or subsidies. The target is Pix, Brazil's free instant-payment rail, which US trade officials say locks out Visa and Mastercard by capping merchant fees and mandating free transfers for individuals.

What the numbers actually show

Pix processed nearly 7 billion transactions worth roughly R$3 trillion ($590 billion) in June alone, and 42.9 billion transactions in the second half of 2025 versus 23.8 billion across all card types combined, according to Brazil's central bank. More than 170 million people, over 90% of Brazilian adults, use it. Those are the figures the US Trade Representative is citing as evidence of an unfair playing field for American card networks.

But the same reporting carries a second number that undercuts the premise: dollar-linked stablecoins already account for roughly 90% of crypto transaction volume in Brazil, according to the country's own tax authority. Brazil moves between $6 billion and $8 billion in crypto every month, and most of that is dollar-denominated tokens rather than the real. The dollar isn't losing ground in Brazil's digital economy. It's running through the back door in stablecoin form while Washington tariffs the front door.

The tariff fights the wrong battle

The Section 301 case treats Pix as a threat to dollar-based commerce because it competes with Visa and Mastercard on domestic rails. That's a real market-access complaint. But it has nothing to do with dollar demand, which is exactly what a trade action justified on national-currency grounds should be measuring. Brazilians already hold and transact in dollar stablecoins at scale, for savings, remittances, and settlement, without any tariff pushing them there.

That's why Brazil's central bank, not Washington, is the one actually working to contain the dollar's reach. Resolution 561, effective October 1, bars payment firms from settling cross-border payments in stablecoins or other crypto, closing a channel that had let reais route through dollar tokens on the way out of the country. Brazilian regulators call stablecoins a threat to monetary sovereignty and tax enforcement. The US, meanwhile, is punishing the one payment system that has nothing to do with dollar substitution, while the actual substitution happens on-chain and largely outside its reach.

Rodrigo Caggiano, founder of RWA Monitor, told CoinDesk that Pix and stablecoins aren't rivals: "Pix has addressed domestic instant payments well, while stablecoins expand what is possible by operating on blockchain networks." That framing matters. Pix handles retail transactions inside Brazil. Stablecoins handle cross-border flows, settlement, and dollar-denominated savings. A tariff aimed at Pix doesn't touch the second category at all, and the second category is where the dollar's real footprint sits.

What would prove this wrong

Brazil is also building Drex, its own tokenized-settlement system on programmable rails, which suggests the central bank sees the stablecoin question as strategic infrastructure, not a side issue. If the tariff pushes Brazil to accelerate stablecoin restrictions faster than Drex can absorb the volume, dollar tokens could see a real drop in the country's crypto mix. Watch whether that 90% dollar-stablecoin share moves after Resolution 561 takes effect in October. If it holds steady while Pix keeps growing under tariff pressure, the tariff will have hit the wrong target twice.