Receita Federal and US LLCs: No Tax Treaty, No Safety Net

Brazil is the world's ninth-largest economy by GDP. The United States is its second-largest trading partner. Yet there is no income tax treaty between the two countries. No reduced withholding rates. No tie-breaker provisions for dual residents. No mutual agreement procedure for disputes. No competent authority mechanism when both countries tax the same income. For a Brazilian resident who owns a US LLC, this absence is not a technicality — it is the defining structural feature of their cross-border tax position.

Most US LLC formation guides — including guides written for non-resident founders — assume some form of treaty relief exists between the founder's home country and the United States. They discuss reduced withholding rates, tie-breaker rules, and foreign tax credit mechanisms that depend on bilateral agreements. For Brazilian founders, none of this applies. The tax relationship between Brazil and the US is governed entirely by each country's domestic law, operating independently, with no coordination mechanism beyond the FATCA Intergovernmental Agreement (IGA) signed in 2014.

The practical consequences are immediate and ongoing: the IRS applies the full 30% withholding rate on FDAP income (rather than a treaty-reduced rate), Brazil's Receita Federal taxes worldwide income at rates up to 27.5%, Carnê-Leão payments are due monthly (not annually), and the BACEN (Banco Central do Brasil) requires separate reporting of all foreign assets. Every obligation runs on its own schedule, in its own jurisdiction, with its own penalty regime.

What "no treaty" means in practice

The absence of a US-Brazil tax treaty creates five specific gaps that treaty countries do not face:

1. No reduced withholding rates

When a US-source payment (dividends, interest, royalties, or service fees) is made to a Brazilian resident, the default IRS withholding rate of 30% applies under IRC Section 1441. Treaty countries negotiate reduced rates — 15% on dividends, 10% on interest, 0-10% on royalties. Brazil has no such reductions. A Brazilian founder whose US LLC receives royalty income from a US client faces the full 30% withholding, with no treaty mechanism to reduce it.

For effectively connected income (ECI) — income from a US trade or business — the 30% flat withholding does not apply. Instead, the income is taxed at graduated individual rates (10-37%) on the owner's Form 1040-NR. But FDAP income (fixed, determinable, annual, or periodical income) that is not ECI hits the full 30%.

2. No tie-breaker provisions

Tax treaties include a "tie-breaker" article that determines which country has primary taxing rights when an individual qualifies as a tax resident of both countries. Without a treaty, if a Brazilian founder spends enough time in the US to trigger the Substantial Presence Test (183 days over a three-year weighted period), both countries can claim the founder as a full tax resident simultaneously. There is no mechanism to resolve the conflict. Both the IRS and Receita Federal tax worldwide income, and both do so independently.

3. No mutual agreement procedure

Treaty countries provide a Mutual Agreement Procedure (MAP) — a formal process where the two countries' tax authorities negotiate to eliminate double taxation in specific cases. For Brazil-US situations, this does not exist. If both countries tax the same income and the founder believes the combined burden is unjust, there is no bilateral forum to raise the issue.

4. No exchange of information agreement (tax treaty basis)

While the US and Brazil do not have a tax treaty-based exchange of information mechanism, they do exchange financial account information through two separate channels:

• FATCA IGA (Model 1): Brazil signed a FATCA Intergovernmental Agreement with the US in 2014. Under this agreement, Brazilian financial institutions report US account holders to the Receita Federal, which then transmits the information to the IRS. In the reverse direction, US financial institutions report Brazilian account holders to the IRS, which transmits to the Receita Federal.
• CRS (Common Reporting Standard): Brazil adopted the OECD's CRS in 2017. The US has not adopted CRS. This means Brazilian financial institutions report to 100+ jurisdictions through CRS, but US financial institutions do not report to Brazil through CRS. Brazilian founders' US bank accounts are visible to the Receita Federal through FATCA, but not through CRS.

The practical result: the Receita Federal receives information about Brazilian residents' US financial accounts through FATCA. The information flow exists — it simply operates outside of a tax treaty framework.

5. No foreign tax credit coordination

Treaty countries include specific articles addressing how foreign tax credits are calculated and which taxes qualify. Without a treaty, Brazil's foreign tax credit for US taxes paid is governed entirely by Brazilian domestic law (Lei 4.506/64, Article 6), with no bilateral coordination on which taxes qualify, how to handle income category mismatches, or how to treat taxes that one country imposes but the other does not recognize.

Receita Federal worldwide income taxation

Brazil taxes its tax residents on worldwide income. A Brazilian resident who earns $8,000 per month through a US LLC owes Brazilian income tax on that amount, regardless of whether the money is distributed from the LLC, remains in the US bank account, or is reinvested in the business. The income is classified as foreign-source rendimentos (earnings) and taxed at Brazil's progressive IRPF rates.

IRPF progressive rates (2026)

For a founder earning $8,000 USD per month (approximately R$40,000 at a 5.0 BRL/USD exchange rate), the effective Receita Federal rate on this income falls in the 27.5% bracket. After the deduction, the effective rate on R$40,000 per month of foreign-source income is approximately 25.3%.

How US LLC income is classified

The Receita Federal classifies income earned through a foreign entity by a Brazilian resident as foreign-source rendimentos tributáveis (taxable earnings). The key classification questions:

• Single-member LLC (disregarded for IRS purposes): The IRS treats the income as belonging directly to the owner. The Receita Federal's treatment depends on whether it views the LLC as a transparent entity or as a separate foreign legal person. In practice, Brazilian tax authorities generally look through single-member structures and tax the income as personal foreign-source income of the Brazilian resident.
• Income type: Whether the income is service revenue, product sales, interest, or dividends affects the classification on the IRPF return. Service revenue earned through a US LLC by a Brazilian resident performing services is classified as rendimentos do trabalho recebidos do exterior (work income received from abroad).
• Currency conversion: Income is converted to BRL at the PTAX rate (published by the Banco Central) on the date of receipt or credit.

The Carnê-Leão trap

Carnê-Leão is Brazil's monthly tax payment mechanism for income received from foreign sources, other individuals, or sources without withholding at source. For Brazilian founders with US LLCs, Carnê-Leão applies to every month in which foreign-source income is received. Payment is due by the last business day of the month following the month of receipt. This monthly cadence catches founders who expect annual filing — by the time the annual IRPF declaration is due, twelve months of unpaid Carnê-Leão installments may have accumulated, each accruing interest and penalties.

How Carnê-Leão works

1. The founder receives LLC income in January (say, $8,000 USD deposited to the LLC's Mercury account)
2. The income is converted to BRL at the PTAX rate on the date of receipt
3. The founder calculates the IRPF tax on this amount using the progressive table
4. Payment is made via DARF (Documento de Arrecadação de Receitas Federais) code 0190 by the last business day of February
5. The process repeats every month

Since 2024, the Receita Federal provides the Carnê-Leão Web system (accessible through e-CAC) for calculating and generating DARF payment slips. The system handles the IRPF rate calculation and produces the payment document.

Late payment consequences

The penalty structure is cumulative. A founder who misses six months of Carnê-Leão payments does not face a single penalty — each month's missed payment accrues its own penalty and interest independently. At a 13.25% SELIC rate, the interest alone adds approximately 1.1% per month to each unpaid installment.

The common mistake

Many Brazilian founders treat US LLC income the same way they treat domestic Brazilian income from formal employment — as something that will be reconciled at the annual IRPF filing. But domestic employment income has tax withheld at source (the employer deducts IRPF before paying the employee). Foreign-source income has no withholding at source. The Carnê-Leão mechanism exists precisely because there is no employer or paying agent to withhold the tax. The founder is the one responsible for the monthly calculation and payment.

A founder who earns R$40,000/month through a US LLC and does not make Carnê-Leão payments for an entire year faces approximately R$120,000 in unpaid tax. With maximum penalties (20%) and a year of SELIC interest (~13.25%), the total liability grows to approximately R$160,000 — an additional R$40,000 in penalties and interest on top of the tax itself.

Foreign tax credit without a treaty

Brazil allows a unilateral foreign tax credit under Lei 4.506/64, Article 6, and the Regulamento do Imposto sobre a Renda (RIR/2018), Article 1001. The credit permits Brazilian residents to offset taxes paid to foreign governments against their Brazilian IRPF liability on the same income. The credit is limited to the lesser of: (a) the tax actually paid to the foreign government, or (b) the Brazilian tax that would apply to the same income. This mechanism exists regardless of whether a tax treaty is in place — it is a domestic provision, not a treaty-based one.

How the credit works

1. The founder earns $100,000 USD through the US LLC in a calendar year
2. The IRS taxes this as effectively connected income on Form 1040-NR — assume ~$17,000 in US federal tax
3. The Receita Federal taxes the same income as foreign-source rendimentos — assume ~R$125,000 in IRPF (on R$500,000 at the 27.5% bracket)
4. The founder claims a foreign tax credit on the IRPF return for the US tax paid
5. The credit is limited to the Brazilian tax on the same income — so the maximum credit is R$125,000 (the Brazilian tax)
6. The US tax of $17,000 (~R$85,000) is below the Brazilian tax on the same income, so the full US tax qualifies as a credit

Calculation mechanics

This is the scenario where the credit mechanism works relatively cleanly — the US tax is lower than the Brazilian tax on the same income, so the full US tax is creditable. The combined rate approximates the higher of the two countries' rates (Brazil's 27.5% marginal rate), which is the intended outcome of a foreign tax credit system.

When the credit does not fully offset

The credit fails to fully eliminate double taxation in several situations:

• US state taxes: If the LLC is formed in a state with income tax (e.g., California at up to 13.3%), the combined US federal + state tax may exceed the Brazilian tax on the same income. The excess US tax is not creditable — it is lost.
• Different income categories: Brazil separates income by type (trabalho, capital, etc.). A US tax credit earned on service income cannot offset Brazilian tax on capital gains from the same LLC. Each category is computed separately.
• Timing mismatches: The Carnê-Leão payment (monthly) and the US tax payment (quarterly estimated or annual) occur on different schedules. The foreign tax credit on the annual IRPF return reconciles payments made in different months of the year.
• Currency fluctuation: The PTAX rate on the date of US tax payment may differ from the PTAX rate on the date the income was received. This creates small but persistent mismatches in the credit calculation.

Reciprocity requirement

Lei 4.506/64 contains a reciprocity clause — the foreign tax credit is available for taxes paid to countries that provide equivalent treatment to Brazilian taxes. The US does allow foreign tax credits for Brazilian taxes (under IRC Section 901), so the reciprocity requirement is met. However, the Receita Federal can challenge the credit if the founder cannot provide adequate documentation of the US tax paid (Form 1040-NR, payment receipts, or IRS transcripts).

BACEN CBE reporting

The Declaração de Capitais Brasileiros no Exterior (CBE) is a separate reporting obligation administered by the Banco Central do Brasil (BACEN), not the Receita Federal. Any Brazilian resident (individual or entity) holding foreign assets totaling $100,000 USD or more on the reference dates is required to file the CBE. The US LLC itself — as a membership interest in a foreign entity — counts as a foreign asset. So does the LLC's US bank account balance.

Filing thresholds and frequency

The annual CBE filing deadline is generally April 5 of the following year (for the December 31 reference date). The Banco Central publishes exact dates each year.

What counts as foreign assets

For CBE purposes, foreign assets include:

• Equity interests in foreign entities — the membership interest in a US LLC
• Deposits in foreign bank accounts — the LLC's Mercury, Relay, or other US bank account balance
• Foreign real estate — not commonly relevant for LLC-only founders
• Securities held abroad — stocks, bonds, or other financial instruments in US brokerage accounts
• Other rights and assets abroad — intellectual property registered in the US, receivables from US clients

A Brazilian founder with a US LLC valued at $60,000 and a US bank account balance of $50,000 has $110,000 in foreign assets — above the $100,000 threshold. The CBE filing obligation is triggered.

Penalties for non-filing

The penalties are calculated on the total value of foreign assets, not on the tax owed. A founder with $200,000 in foreign assets who fails to file the CBE faces a potential penalty of up to R$250,000 (approximately $50,000 USD). The penalty is administrative — it is separate from any tax-related penalties imposed by the Receita Federal.

IRPF annual declaration

The IRPF annual declaration (Declaração de Ajuste Anual) is due by the last business day of April each year (for the previous calendar year). For founders with US LLCs, the declaration serves as the reconciliation point — Carnê-Leão payments made throughout the year are credited against the annual tax calculation, and the foreign tax credit for US taxes paid is claimed.

Where to report US LLC income

The IRPF declaration has specific schedules (fichas) for foreign-source income and foreign assets:

Reporting the LLC itself

Under Bens e Direitos (Assets and Rights), the LLC membership interest is reported using:

• Grupo 03 — Participações Societárias
• Código 01 or 02 — depending on whether it is a controlling interest or minority interest
• Discriminação field: Include the LLC name, EIN, state of formation, ownership percentage, and acquisition date
• Situação em 31/12 (previous year and current year): Report the cost basis of the membership interest in BRL, converted at the PTAX rate on the date of the capital contribution

The US bank account is reported separately under Grupo 06 (Depósitos e Créditos), Código 01 (Depósito bancário no exterior), with the bank name, account number, country, and balance in BRL converted at the PTAX rate on December 31.

Form 5472 and Receita Federal: dual reporting

The same transactions that trigger Brazilian reporting obligations also trigger US filing requirements. Form 5472 (Information Return of a 25% Foreign-Owned US Corporation) requires disclosure of all "reportable transactions" between the US LLC and its foreign owner. Every capital contribution, distribution, loan, service fee, and payment between the Brazilian founder and the LLC appears on both Form 5472 (filed with the IRS) and the IRPF Bens e Direitos schedule (filed with the Receita Federal).

Overlapping disclosure

The IRS penalty for failing to file Form 5472 is $25,000 per form, per year. The Receita Federal's penalties for incomplete IRPF reporting vary but include fines of 75% of the tax due on unreported income (150% in cases of fraud or intentional omission under Article 44 of Lei 9.430/96).

The coordination challenge

Because there is no tax treaty and no bilateral exchange of tax returns, the two reporting systems operate independently. The IRS does not verify Form 5472 against the Brazilian IRPF filing, and the Receita Federal does not cross-reference its records against Form 5472. However, FATCA IGA reporting means that the Receita Federal receives information about the Brazilian founder's US bank account balances and income, which it can compare against the founder's IRPF declaration. Discrepancies between what the US bank reports (via FATCA) and what the founder declares on the IRPF can trigger a malha fina (tax return review).

Practical scenarios

Scenario 1: Brazilian SaaS founder ($8,000/month)

Profile: A developer in São Paulo runs a B2B SaaS product through a Wyoming LLC. US and international clients pay $8,000/month to the LLC's Mercury account. The founder works from Brazil and has no US physical presence.

US obligations:

Brazilian obligations:

Combined annual tax burden (if US taxes ECI):

Scenario 2: Freelancer on Upwork ($3,000/month)

Profile: A Brazilian designer in Florianópolis freelances through Upwork, receiving $3,000/month. The founder formed a New Mexico LLC to invoice clients outside of Upwork and receives $3,000/month through the LLC as well. Total income: $6,000/month ($72,000/year).

Key difference: Upwork income may not flow through the LLC. The LLC-sourced income ($36,000/year) has different US tax treatment than the Upwork income ($36,000/year), which is paid directly to the founder's personal account.

Brazilian treatment: The Receita Federal taxes both income streams as foreign-source rendimentos. Carnê-Leão applies to both. The founder makes a single monthly Carnê-Leão payment covering all foreign-source income received that month.

Scenario 3: E-commerce ($15,000/month)

Profile: A Brazilian entrepreneur sells physical products to US customers through a Delaware LLC with a Shopify store. Revenue: $15,000/month, with $9,000 in COGS and operating expenses. Net profit: $6,000/month.

US treatment: The LLC is engaged in a US trade or business (selling to US customers). The $72,000 net profit is effectively connected income, taxed on Form 1040-NR at graduated rates (~$11,600 in federal tax).

Brazilian treatment: The Receita Federal taxes the founder's share of the LLC's net income. The question of whether expenses are deductible for Carnê-Leão purposes is complex — the Carnê-Leão system accepts certain deductions (pension, dependents, professional expenses documented in the livro-caixa), but business expenses of a foreign entity do not map cleanly to the Brazilian deduction categories.

The reporting burden is highest for this scenario because the e-commerce operation generates high transaction volumes (hundreds of Shopify transactions per month), each of which potentially affects both Form 5472 disclosures and IRPF reporting.

Frequently asked questions

Does the US-Brazil FATCA IGA substitute for a tax treaty?

No. The FATCA Intergovernmental Agreement is an information-exchange mechanism, not a tax agreement. It governs the reporting of financial account information between the two countries but does not provide any relief from double taxation, reduce withholding rates, establish tie-breaker rules, or create a mutual agreement procedure. A Brazilian founder's US bank account information is shared with the Receita Federal under FATCA, but this does not reduce the founder's tax obligations in either country.

Can Carnê-Leão be avoided by not distributing LLC income?

For the Receita Federal, the tax obligation on foreign-source income arises when the income is "available" to the Brazilian resident — not only when it is distributed. A single-member LLC where the founder controls all distributions and can access the funds at any time creates a strong argument that the income is available when earned. The Receita Federal has taken the position in rulings (Soluções de Consulta) that income from a foreign entity controlled by a Brazilian resident is taxable when credited or made available, regardless of whether a formal distribution occurs. Deferring distributions without changing the underlying control structure does not eliminate the Carnê-Leão obligation.

Is there a minimum threshold for Carnê-Leão?

The Carnê-Leão obligation applies to any month in which foreign-source income exceeds the first bracket of the IRPF table (currently R$2,259.20/month). Below this threshold, the tax rate is 0% — no payment is due, but the income is still reported on the annual IRPF declaration. There is no exemption from the reporting obligation itself.

What happens if a Brazilian founder has been paying US tax but not filing Carnê-Leão?

The founder has been accumulating Brazilian tax debt. Each month of unpaid Carnê-Leão accrues its own penalty (0.33%/day up to 20%) and interest (SELIC rate + 1% in the payment month). The founder can voluntarily regularize by filing the overdue Carnê-Leão payments through the e-CAC system, paying the tax plus penalties and interest. The foreign tax credit for US taxes already paid can be claimed on the annual IRPF declaration to reduce the net Brazilian liability — but the penalties and interest on the late Carnê-Leão payments themselves are not reduced by the foreign tax credit.

Do Brazilian founders need both a Brazilian and a US tax advisor?

A Brazilian founder with a US LLC operates under two independent tax systems with no treaty coordination. The IRS filing requirements (Form 1040-NR, Form 5472, pro forma Form 1120, potential Form 8833) are US-specific. The Receita Federal requirements (Carnê-Leão, IRPF declaration, foreign asset reporting) and BACEN requirements (CBE) are Brazil-specific. Each country's rules require knowledge of that country's tax code, filing systems, and administrative practices. A single advisor familiar with both systems can handle both — but a founder relying solely on a US-based CPA or solely on a Brazilian contador faces blind spots in the other jurisdiction. The tax residency determination process is a starting point for mapping which jurisdiction's rules apply.

Key takeaways

• Brazil and the United States have no income tax treaty. No reduced withholding rates, no tie-breaker provisions, no mutual agreement procedure. The FATCA IGA covers information exchange only.
• The Receita Federal taxes Brazilian residents on worldwide income at rates from 7.5% to 27.5%. US LLC income is classified as foreign-source rendimentos tributáveis.
• Carnê-Leão is a monthly tax payment obligation on foreign-source income, due by the last business day of the following month. Late payment accrues 0.33%/day penalty (up to 20%) plus SELIC interest.
• Brazil's unilateral foreign tax credit (Lei 4.506/64) allows offsetting US taxes paid against Brazilian IRPF, limited to the Brazilian tax that would apply to the same income. The credit does not require a treaty.
• BACEN CBE reporting is separate from tax filing and applies to Brazilian residents with foreign assets totaling $100,000 USD or more. The US LLC membership interest and US bank account balances both count toward the threshold.
• Form 5472 and the IRPF Bens e Direitos schedule require disclosure of the same transactions — capital contributions, distributions, loans, and payments between the founder and the LLC.
• The combined effective tax rate for a Brazilian founder with a US LLC ranges from approximately 21% to 30%, depending on income level, ECI determination, and whether the foreign tax credit fully offsets. The rate can exceed 30% if US state taxes apply or income category mismatches prevent full credit utilization.

References

• Receita Federal — Carnê-Leão Web
• Lei 4.506/64, Article 6 — Foreign Tax Credit
• Regulamento do Imposto sobre a Renda (RIR/2018)
• BACEN — Declaração de Capitais Brasileiros no Exterior (CBE)
• Lei 9.430/96, Article 44 — Penalties for Unreported Income
• FATCA Intergovernmental Agreement — Brazil-US (2014)
• IRC Section 1441 — Withholding of Tax on Nonresident Aliens
• IRS Form 1040-NR — US Nonresident Alien Income Tax Return
• IRS Form 5472 — Information Return of a 25% Foreign-Owned US Corporation