Before you start

A valid foreign driving licence held before you arrived
CPF and CRNM
A sworn Portuguese translation of the licence by a tradutor público juramentado
Proof of a Rio de Janeiro address
Registration in the DETRAN-RJ system and a gov.br account

Step-by-step

1
Count 180 days from entry, not from residence approval
CONTRAN Resolução 933/2022 lets a driver licensed abroad drive in Brazil for a maximum of 180 days, on the basis of the international conventions Brazil has ratified and of reciprocity — in practice that means carrying your home licence together with an International Driving Permit. That window opens when you enter the country, so it can be well advanced by the time your CRNM arrives. Driving past it is an infraction and can complicate an insurance claim after a collision.
OnlineWho: You
2
Get the sworn translation of your licence
It must be produced by a tradutor público juramentado registered with a state Junta Comercial. A professional but unsworn translation, however good, is rejected at the counter. Rio has plenty of sworn translators; check the Junta Comercial do Rio de Janeiro register rather than a search engine.
In personWho: You
3
Open the process with DETRAN-RJ
The conversion — convalidação de habilitação estrangeira — is opened through the DETRAN-RJ portal with your CPF, CRNM, translated licence and proof of address. DETRAN-RJ then directs you to accredited clinics for the examinations rather than letting you choose freely.
OnlineWho: You
4
Sit the medical and psychological examinations
Resolução CONTRAN 933/2022 requires a foreign driver converting a licence to pass the exame de aptidão física e mental and the avaliação psicológica under art. 147 of the Código de Trânsito Brasileiro. The psychological assessment is a battery of attention, reaction and personality tests lasting an hour or two. It is routine, not a judgement on you, and it is the step people fail to schedule for.
In personWho: You1–3 weeks depending on clinic availability
5
Collect the CNH and register on the digital wallet
The CNH is issued in the categories corresponding to your foreign entitlement. Download the Carteira Digital de Trânsito app — the digital CNH is legally valid at a roadside stop, which matters in a city where carrying original documents around is not advisable.
Mobile appWho: You
6
Learn the Lei Seca before your first night out
Brazil's drink-driving rule is effectively zero tolerance, and Rio runs high-visibility roadside blitzes on weekend nights on the main Zona Sul and Barra arteries. Refusing the breathalyser carries the same administrative penalty as failing it. Cariocas simply do not drive after a drink, and neither should you.
In personWho: You

Documents you’ll need

Foreign driving licence, original
Sworn Portuguese translation of it
CPF
CRNM or the registration protocol
Proof of Rio address
Medical and psychological examination results

Things most newcomers don’t know

The psychological assessment is compulsory and catches essentially every foreigner off guard.

No European or North American licensing system requires one, so nobody budgets time or money for it. In Brazil it applies to every licence including a straight conversion of a thirty-year clean record. It is an hour or two of attention and personality testing at an accredited clinic, and clinic waiting lists — not DETRAN — are what make the conversion take a month.

Source: CONTRAN Resoluções 927/2022 and 933/2022

Rio has no rodízio, which makes car ownership meaningfully easier here than in São Paulo.

São Paulo bans cars from its expanded centre one weekday a week by plate digit, which shapes what car people buy and how they plan a week. Rio has never adopted it. The constraint here is not the rule, it is the geography — tunnels, the Lagoa bottleneck and Zona Sul parking — so a car is genuinely useful for Barra and the Região dos Lagos and genuinely a burden in Copacabana.

Source: Prefeitura do Rio de Janeiro traffic regulations

Satnav routing is a real safety issue in Rio, and Waze ships a specific countermeasure for it.

Access roads through favelas are public roads and appear as ordinary options to a routing algorithm optimising for time. Drivers following the blue line into the wrong community have been shot at. Waze mapped Rio risk areas ahead of the 2016 Olympics and still treats Rio as one of only two places worldwide where it avoids high-risk areas by default; a Rio municipal law also obliges navigation apps to warn users approaching one. Leave that setting on, and check the whole route before pulling away rather than reacting to instructions at a junction.

Source: Waze high-risk-area support documentation and Rio de Janeiro municipal legislation

The Lei Seca is enforced far harder in Rio than the written limit suggests.

The administrative threshold is effectively any detectable alcohol once the measurement tolerance is applied, and refusing the test is penalised identically to failing it — so there is no tactical advantage in declining. Rio's blitzes concentrate on the exact routes home from the nightlife districts on Friday and Saturday nights. Penalties are a heavy fine, a twelve-month suspension of the right to drive and, above the criminal threshold in art. 306, arrest.

Source: Código de Trânsito Brasileiro, arts. 165, 165-A, 277 and 306

Common mistakes to avoid

Counting the 180 days from residence approval rather than from your first entry.
Paying for an ordinary translation instead of a sworn one and having it refused.
Not booking the psychological assessment early and discovering the clinic queue.
Driving after a single drink on the assumption there is a legal limit to sit under.
Following a navigation app's shortcut off the main avenues, especially after dark.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.

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