Resolution BCB 521 puts stablecoin flows inside Brazil's FX rules
An amending instrument, not a standalone crypto rule
Resolution BCB 521 of 10 November 2025 does not create a virtual asset regime of its own. It amends three foreign exchange instruments already on the books — Resolutions BCB 277, 278 and 279, all of 31 December 2022 — so that virtual asset activity is read inside Brazil's foreign exchange and international capital rules rather than alongside them. It was published in the same package as Resolutions BCB 519 and 520, and the framework those instruments form took effect on 2 February 2026 (Res. BCB 519, art. 28). On our last full pass through the BCB normative database in mid-August 2026, Resolutions 519, 520 and 521 were unamended.
The practical consequence is easy to state. A provider that has mapped its obligations only against the authorisation rules in Resolution 520 and Normative Instruction BCB 704 has mapped roughly half of them. The other half sits in the exchange-control rulebook, and it bites on the product, not on the licence file.
The four operations brought into the FX market
Resolution 521 inserts a new title into Res. BCB 277 covering the provision of virtual asset services in the foreign exchange market. Article 76-A, as reproduced in published texts of the resolution, brings in:
- international payment or transfer made using virtual assets;
- transfers of virtual assets to meet obligations on cards or electronic payment instruments for international use;
- transfers to self-custodied wallets;
- the purchase, sale or exchange of virtual assets referenced to a fiat currency.
That last limb is the stablecoin hook, and it is the one firms tend to miss. A desk that thinks of itself as running a domestic order book, not a remittance business, can still be operating inside the FX perimeter because the asset it trades is referenced to a currency.
The prohibition that changes how a desk is built
Article 76-A also carries a prohibition: buying or selling virtual assets with payment or receipt in foreign currency. Read plainly, a Brazilian provider settles the fiat leg in reais. A structure that quotes and settles a stablecoin trade in US dollars against a Brazilian client is not a structure the rule contemplates. This is a design constraint, not a filing item, and it is cheaper to discover now than after the authorisation file is built around a product that cannot be offered.
What counts as an international transfer
Article 76-B defines the international payment or transfer as a change of ownership of virtual assets between a resident and a non-resident, or the sending or receiving of virtual assets abroad for the same person. Trades executed on the provider's own order book are excluded. Published alerts also describe a duty to establish whether a foreign counterparty provider is under prudential supervision or belongs to a group supervised on a consolidated basis — treat that as reporting of the rule and check the wording before you build the counterparty test.
The figures, and where each one comes from
- US$50,000 — the per-operation ceiling for using the simplified purpose codes in Annex III, under art. 76-C. This is instrument text as reproduced.
- US$100,000 — a limit expressed in art. 29 for virtual asset service companies. Reproductions of the resolution attach it to the SPSAV's international transfers; one law firm alert attaches it to operations facing non-authorised institutions. The two framings are not the same. Treat the cap as real and its precise perimeter as something to confirm in the article text before sizing a product around it.
- Monthly reporting under the new art. 82-A, due by the fifth day of the month following the operation.
- Two commencement dates — 2 February 2026 for most provisions, and 4 May 2026 for arts. 76-C and 82-A together with the related annexes.
One disclosure on sourcing. We were unable to open the BCB's own consolidated page for Resolution 521 during this check. The figures above come from reproductions of the published text and from three independent law-firm alerts that agree on them. That is good corroboration and it is not the same thing as the consolidated text. Confirm the numbers against the BCB text before they go into a board paper.
The reporting plumbing already has a form
Normative Instruction BCB 693, published in December 2025, is reported to set the operational procedure for the art. 82-A information: an ACAM 212 document filed in XML through the Sistema de Transferencia de Arquivos, with the first submissions covering May 2026 operations. It is complementary guidance rather than a change to the underlying duty, but it means the reporting obligation has a defined file format and a defined channel — which in turn means the data has to exist in your systems in that shape.
None of this starts before authorisation
An FX perimeter matters only to a provider that is allowed to operate. The Phase 1 filing deadline for providers already operating on 2 February 2026 remains 30 October 2026 (IN BCB 704, art. 9 caput); we confirmed it unchanged in mid-August 2026, with no prorogation. A provider that does not file must cease within 30 days, notify clients and transfer their assets to other authorised institutions, and from that date BCB-supervised institutions are prohibited from facilitating virtual asset operations with unauthorised providers, which removes the banking rails. Capital is a Phase 1 gate and is a calculation, not a price list, in the region of R$10.8m to R$37.2m depending on categories and activities.
The checklist behind this article
The Brazil PSAV readiness checklist walks the authorisation file item by item — the Phase 1 set under IN BCB 704 art. 9, the Phase 2 set under art. 10, the capital calculation inputs and the Anexo IV assurance heads — with every item cited to an article number, every figure marked as instrument text or as reporting of it, and the open questions left marked open rather than guessed. USD 79, and the updated edition is free as the position develops.
If your flows are ordinary — one category, reais settlement, no cross-border leg — the checklist is enough on its own. If they are not, for example because you route stablecoin payments across borders or face a foreign affiliate, the 48-hour gap check looks at your specific structure against arts. 76-A to 76-C.