IOF in Brazil: How the Financial Transactions Tax Affects Cross-Border Operations
Short answer. The IOF (tax on financial operations) is a federal tax on credit, foreign exchange, insurance and securities. For a foreign company it bites most on FX conversions, cross-border loans and remittances. Because it is set by decree, the government can change rates quickly — and did so in 2025 — so any IOF figure must be confirmed for the specific operation and date.
Where IOF hits cross-border operations
- IOF-Câmbio (foreign exchange). Applies when converting BRL to or from foreign currency — funding, payments, remittances. After the 2025 changes, the general rate on most outbound FX rose to 3.5% (from the former 0.38%). Note the legal basis: the original Decreto 12.466/2025 was overturned by Congress and suspended; the 3.5% rate was reinstated by Decreto 12.499/2025, upheld by the STF. [Source: Regulamento do IOF — Decreto 6.306/2007, with 2025 amendments — Planalto]
- Cross-border loans. Short-term inbound loans (tenor under one year) were brought into the 3.5% band, continuing Brazil’s long-standing use of IOF to discourage speculative short-term inflows. [Source: Decreto 6.306/2007]
- Key 0% carve-outs. Remittances of dividends and interest on net equity (JCP), and the inflow and return of foreign portfolio investment in the financial and capital markets, were kept at 0% IOF-câmbio. [Source: Decreto 6.306/2007, with 2025 amendments]
Why “check the current rate” is the real advice
IOF rates move by decree, which makes them fast-changing and, in 2025, politically contested — the year saw new decrees, partial reversals and judicial review. The structure above reflects the post-2025 position, but any IOF rate you plan around should be re-verified against the current Regulamento do IOF and Banco Central FX rules at transaction time. [Source: Decreto 6.306/2007; Banco Central do Brasil — FX regulations]
How IOF interacts with the dividend layer
From 2026, dividends remitted abroad carry a 10% withholding income tax (IRRF) — but the FX leg of that remittance is at 0% IOF-câmbio. Funding a subsidiary or paying for services, by contrast, can attract the 3.5% FX charge. So IOF is part of the cost of moving money, separate from the tax on earning it.
Practical takeaway
Treat IOF as a point-in-time figure: build the FX charge into the cost of funding and remittances, watch the 0% carve-outs for dividends/JCP and portfolio flows, and re-confirm rates at each transaction because they are decree-driven.
FAQ
What is the general IOF-câmbio rate after the 2025 changes? 3.5% on most outbound FX operations, up from 0.38%.
Is there IOF on remitting dividends abroad? The FX leg is at 0% IOF-câmbio; separately, a 10% IRRF applies to dividends from 2026.
Can IOF rates change again? Yes — IOF is set by decree and can be changed quickly; confirm the current rate per operation.
Sources
Official sources reviewed for this brief: the IOF Regulation (Decreto 6.306/2007), as amended during 2025 (Decreto 12.466/2025, overturned, and the reinstating Decreto 12.499/2025), and the foreign-exchange and capital-flow rules of the Banco Central do Brasil. The interaction with dividend withholding follows Lei 15.270/2025.