Can You Use US Dollars in Brazil? Four Questions, Not One

The rule in force replaced the one everyone quotes

Search this in English and you will land on Decree-Law 857 of 1969. It is dead: Law 14,286/2021, Brazil's foreign exchange law, repealed it outright and took effect on December 31, 2022. Reasoning from the 1969 text is reasoning from a rule that no longer exists.

What replaced it is narrower. Article 13 allows a payment to be priced in foreign currency, for obligations enforceable inside Brazil, in nine listed situations; its closing paragraph shuts the rest, making any stipulation outside those nine nula de pleno direito, void as a matter of law.

The second situation reaches you directly — obligations whose creditor or debtor is a non-resident. A visitor is a non-resident, so a dollar price agreed with you sits inside the article rather than outside it. One carve-out is written into the same item: leases of real property in Brazil are excluded by name. Rent an apartment here and the rent is in reais, whoever you are.

Priced in dollars is not the same as accepted in dollars

Article 13 is about contracts, not cash registers. It says which obligations may be denominated in a foreign currency, and stops. It obliges no merchant to take a twenty-dollar bill; we found no rule that does, and none saying the opposite. We record that at the bottom, as an absence.

The moment a card enters, the question changes hands. A payment taken in Brazil settles exclusively in reais, and that figure is final — indexing it to a foreign currency or converting it later is forbidden. Your own issuer converts, at home, under no Brazilian rule at all.

So the honest answer is neither "it is illegal to charge you in dollars" nor "there is no rule". The law permits the price, the card rules govern the settlement, and the counter decides whether it wants paper it cannot bank easily.

Changing dollars: the fee is not where the cost is

Conversion is licensed work — an institution the central bank authorizes to operate in the foreign exchange market. What no rule sets is your price: the rate is livremente pactuada, freely agreed between institution and client, with no official rate you are owed. Article 16 of the central bank’s exchange rules penalizes rates out of line with the market — a floor against abuse, not a benchmark.

One number is forced, and it is the one to ask for: the VET, valor efetivo total — the rate plus the taxes plus any fees, in reais per unit of foreign currency, which the institution must quote before you accept, on any spot operation up to US$ 100,000. That matters, because the fee misleads. At the July 31, 2026 reference date, 293 institutions had declared a ceiling for what the catalog calls the purchase of foreign currency in cash — the institution buying, you selling. Ceilings run from R$ 0.00 to R$ 2,000.00 and the median is R$ 0.00. Most declare nothing, which says where the cost lives: in the rate — which the VET captures and the window display does not. The spread between counters is next door.

Two ceilings, and the swap the law leaves alone

Reais leave the counter in cash only up to R$ 10,000 per operation; above that they must be credited to an account, which a visitor rarely holds. Underneath sits a line almost nobody hears about: Law 14,286 does not apply at all to buying or selling foreign currency in cash up to US$ 500, or the equivalent, carried out in Brazil, occasionally and non-professionally, between individuals. Three conditions, all at once. Swapping a hundred dollars with a fellow traveler is outside the law's reach; a man doing it on a corner all day is not.

One provision runs the other way: a non-resident transitorily in Brazil may receive foreign currency in cash with no exchange operation at all, where it comes from a payment order in his favor. Money arriving for you, not money you spend.

Sources

Read August 26, 2026.

• Presidência da República — arts. 2, 13, 19 and 28: the rate freely agreed, pricing in foreign currency, the US$ 500 exemption, the repeal of Decree-Law 857/1969. Law 14,286/2021
• Banco Central do Brasil — arts. 16, 18, 19, 48 and 54: abusive rates, the VET, the cash ceiling in reais, foreign cash for a non-resident, settlement in reais. Resolution BCB 277/2022
• Banco Central do Brasil — fees declared for cash exchange, July 31, 2026 (tariff catalog); the points list, reported voluntarily (exchange points); the warning that published VET values bind nobody (VET ranking)

Method on how we research; Jeff Bruno writes from Curitiba. Next door: what a CPF is, money and payments, all guides.

What we could not verify

• Any Brazilian rule obliging, or forbidding, a merchant to accept foreign cash. Law 14,286/2021 and the central bank's exchange rulebook both govern who may convert currency and how a debt may be priced. Neither reaches the counter's decision. An absence we searched for, not a settled "no such rule".
• Where dollars are actually taken over a counter. We looked in the exchange rulebook, the catalog of declared fees, the rate ranking and the dataset of exchange points, reported into voluntarily by 51 institutions in August 2026. All four describe licensed institutions converting currency; none measures what a hotel does with a twenty.
• Which tax line covers your direction. The IOF decree names a rate for acquiring foreign currency in cash. Handing dollars over and receiving reais is the opposite motion, falling to a residual the decree does not name. The VET includes the taxes anyway.
• Whether any authority has applied article 13 at a shop counter. The rule and its nine situations are open and published. No decision, guidance or consumer-body opinion applying them to a visitor quoted in his own currency turned up, and no Brazilian norm uses the term dynamic currency conversion.