Brazil Tax Residency for Americans: The 184-Day Rule, Carnê-Leão and the Missing Treaty

The short version

Two countries will be interested in your income, and they look at different things. Brazil taxes you as a resident once you meet its residency test, which for most Americans on a temporary basis is a day count. The United States taxes its citizens on worldwide income wherever they live. There is no income tax treaty between the two, but there is a credit mechanism and a Social Security agreement.

Question	Short answer	Source
When do I become a Brazilian tax resident?	On a temporary basis, on your 184th day in Brazil within up to 12 months	Receita Federal
What does residency trigger?	Monthly carnê-leão on income from abroad, the annual return, and a CBE if assets abroad reach US$1 million	Receita Federal, Banco Central
Do I keep filing in the US?	Yes, plus an FBAR above US$10,000 in foreign accounts	IRS, FinCEN
Is there a treaty?	No income tax treaty; a reciprocity credit and a Social Security agreement	IRS, Receita Federal, SSA

This is general information as of November 2026, checked against official sources on November 3, 2026. It computes no one's tax. Rates and tables change every year.

When you become a Brazilian tax resident

The Receita Federal's residency rules are written in terms of visas:

• Permanent visa: a tax resident from the date of arrival.
• Temporary visa, coming to work under a Brazilian employment contract: a tax resident on arrival.
• Temporary visa, any other case: a tax resident on the date you complete 184 days in Brazil, consecutive or not, within a period of up to 12 months, or earlier, on the date you obtain a permanent visa or a Brazilian employment contract.
• 183 days or fewer in a period of up to 12 months: still a non-resident. If you do not reach 184 days within 12 months, a new 12-month period starts at your next entry.

Worked examples

These illustrate the rule as written; they are not a calculation for anyone's situation.

1. One long stay. You arrive on a digital nomad visa issued by a consulate and stay continuously. You become a tax resident on your 184th day in Brazil, roughly six months after arrival.
2. Two stays inside 12 months. You spend 100 days in Brazil, leave for three months, then come back. Your 184th day falls on the 84th day of the second stay, still well inside 12 months of your first entry. You become a resident on that day.
3. Two stays, more than 12 months apart. You spend 150 days in Brazil from January to May, and do not come back until the following February. You never reached 184 days in the 12 months after your first entry, so you stayed a non-resident, and the count starts again from zero when you return.
4. A Brazilian job. You come on a temporary visa to work under a Brazilian employment contract. You are a resident from arrival, with no day count.

The 184-day counter offered on this page is a spreadsheet for logging your own entries and exits against this rule.

Residence authorizations: mapping the old visa wording

Since the 2017 Migration Law, many people hold a residence authorization rather than a visa, and the Receita page still uses the old terms. Here is where the official answers stop.

• Real estate residency (CNIg Resolution 36/2018): settled. In Solução de Consulta COSIT nº 180/2021, the Receita said Resolution 36 "is not a tax rule," and that a holder who enters with the temporary visa becomes a resident on the date they complete 184 days within up to 12 months, unless a permanent visa or a Brazilian employment link comes first. We read the ruling's official summary as reproduced by IBET; the Receita's own database search returned no result.
• Digital nomad residence granted inside Brazil (no visa): no ruling found. Most defensible reading: a term-limited residence authorization is treated like the temporary visa, so the 184-day count applies. The Receita's first test, that a person "lives in Brazil permanently," can also make someone a resident earlier on the facts.
• Indefinite-term residence (for example after the 4 real estate years, or company investment under Resolution 13): most defensible reading: treated like the former permanent visa, so resident from arrival or from the grant. No Receita text says this in words.

For how the residence routes themselves work, see Brazil Digital Nomad Visa for Americans and Brazil's Real Estate Residency.

What Brazilian residency triggers

Carnê-Leão: the monthly tax on income from abroad

The carnê-leão is income tax paid monthly, and it is mandatory for individuals resident in Brazil who receive income from another individual or from abroad. A US salary, consulting fees from US clients or a US pension paid to a Brazilian resident falls into this category. The monthly records feed the annual income tax return (DIRPF).

It uses the progressive monthly table. The Receita's 2026 table runs from 0% up to 27.5%. From January 2026, a reduction table (Lei 15.270/2025) brings the tax on monthly taxable income up to R$5,000 to zero, tapering to no reduction at R$7,350. These amounts change, so read the table for the year you are in.

Foreign investment income: the 15% annual rule

Under Lei 14.754/2023, from January 1, 2024, income from financial investments abroad, and the profits of controlled foreign companies ("offshores"), are taxed once a year in the annual return at a flat 15%. Direct investments are taxed on a cash basis; profits of controlled entities are taxed at 15% on December 31 of the year they are booked, whether or not they are distributed. Our source is the Ministry of Finance and Receita Q&A on the law (version of December 26, 2024), not the law's own text.

Assets abroad: the CBE

Residents of Brazil file an annual CBE (Capitais Brasileiros no Exterior) declaration with the Banco Central when their assets abroad total US$1 million or more on December 31. From US$100 million it is quarterly. For a US citizen moving to Brazil, "abroad" means the US: your US accounts and investments count.

The US side keeps running

• Worldwide income. US citizens and resident aliens are taxed on worldwide income and generally file the same way whether they live in the US or abroad.
• Benefits require a return. The foreign earned income exclusion and the foreign tax credit are only available if you file a US return.
• FBAR. A US person whose foreign financial accounts exceed US$10,000 in aggregate at any time in the year must file FinCEN Form 114, generally due April 15. A Brazilian bank account counts.

The missing treaty, and what exists instead

No income tax treaty

Brazil is absent from the IRS list of US income tax treaties. The list runs from Armenia to Venezuela and includes Canada, Chile and Mexico, so the page does cover Brazil's neighbors.

The reciprocity credit: Ato Declaratório SRF 28/2000

Brazil's tax authority issued Ato Declaratório SRF nº 28 of April 26, 2000, "on the offsetting of tax paid in the United States against tax due in Brazil" (official index record). It is still applied: the 2024 official Q&A on Lei 14.754 says foreign tax can be offset where there is a treaty or reciprocity, naming the United States among the reciprocity countries, and the law itself restates the credit (art. 4).

The limits come from the act's text, which we could read only in a secondary reproduction. It recognizes reciprocity, allows the offset within the limits of the Receita's rules on the credit, and excludes state and local taxes. Most defensible reading: only US federal income tax can be credited, and only up to the Brazilian tax due on that same income. Treat the exact limits as medium confidence until the official text can be read.

The Social Security agreement

A US-Brazil Social Security agreement has been in force since October 1, 2018. It eliminates dual social security coverage for the same work, and lets workers qualify for partial benefits from combined (totalized) work credits. A worker sent by an employer to the other country for 5 years or less stays covered only by the sending country. It is not an income tax treaty and does not change income tax.

Myths checked against the text

• "Tax residency starts after 183 days." The Receita says the 184th day. With 183 days or fewer you remain a non-resident.
• "There is a US-Brazil tax treaty." Some article titles imply one. There is no income tax treaty; there is a reciprocity credit and a Social Security agreement.
• "Nomads pay no Brazilian tax because the employer is foreign." The carnê-leão is specifically for residents' income from abroad. Where the employer sits does not stop the day count.
• "The 2000 ruling means you never pay twice." The credit has limits: on the most defensible reading, federal tax only, capped at the Brazilian tax on the same income, and no state or local taxes.

What is still open

We state these as open because no official text settles them:

• How the Receita applies its visa-based wording to a nomad residence granted inside Brazil (most defensible reading above).
• Whether an indefinite-term residence counts like the former permanent visa (most defensible reading above).
• The exact limits of Ato Declaratório 28/2000, read only in a secondary reproduction.

These are the points to raise with a tax professional who works on both systems.

Where to go from here

• The whole move, in order: Moving to Brazil from the US.
• The nomad residence and its renewal: Brazil Digital Nomad Visa for Americans.
• The real estate route that COSIT 180/2021 addresses: Brazil's Real Estate Residency.
• To lay out your residency start date, a carnê-leão calendar, the FBAR and CBE thresholds and a list of questions for your tax professional, see the US-Brazil Tax Basics for Movers: Workbook. It computes no one's tax.