Latin America Tax IDs: RFC, CPF, RUC & the Full 20-Country List

Latin America does not share one tax ID. Mexico uses the RFC, Brazil the CPF, Paraguay the RUC, Argentina the CUIT, Colombia the NIT, Honduras the RTN, and the Dominican Republic the RNC — twenty countries, twenty systems, and a handful of acronyms that look identical but are not interchangeable.

This is the master list we use with clients who need a local number for banking, property, freelancing, company setup, or tax registration. The pattern is consistent: people fixate on residency visas and under-prepare for the tax ID step that actually unlocks day-to-day life.

Ready to take the next step? Book a consultation call — we’ll map out the right path for your situation.

Latin America Tax IDs — All 20 Countries

Primary tax identification numbers (TINs) for every country in MyLatinLife’s Latin America list. Where individuals and companies use different codes, the table shows the personal default and notes the company variant.

Country Tax ID Guides

The table links to country tax ID guides where available (RFC, CPF, RUC, CUIT, NIT, RUT, RTN, RIF, RNC, TIN, and Costa Rica’s multi-ID stack). Use the linked guides for country-specific requirements.

Tax ID vs National ID — Do Not Mix These Up

The most expensive mistake we see is treating every government number as a tax ID. They are not the same thing.

• Mexico: CURP is population/identity registry. RFC is the tax registry with SAT. Banks and SAT-linked services often want both.
• Brazil: RG (or state ID) is identity. CPF is federal tax/person registry — and the number that actually opens accounts and apps.
• Uruguay: CI (cédula) is national identity. RUT is the tax-register number once economic activity is in play.
• Chile: the opposite simplification — personal RUT usually matches the national RUN number, so the same digits appear on everything.
• Colombia / Dominican Republic (common practice): your cédula often is the number used as TIN once you are registered as a taxpayer — you may not get a separate shiny code.

If a bank, notary, or accountant asks for your “tax ID,” ask which acronym they mean in that country. Handing over a CURP when they want an RFC — or a passport number when they want a CPF — is a classic first-week stall.

Why Expats Actually Need These Numbers

Residency gets you the legal right to stay. A tax ID gets you into the local economic system. Clients routinely need a local TIN for:

• Bank accounts and brokerage — almost every serious bank will ask for the local tax number once you are past tourist KYC theater.
• Property purchase and long leases — notaries and registries expect a fiscal ID on contracts.
• Invoicing and freelancing — electronic invoices (facturas electrónicas) usually require an active taxpayer registration.
• Company formation — founders need personal TINs; the company gets its own (CNPJ, cédula jurídica, company RUC, etc.).
• Utilities, mobile plans, and some government portals — the boring blockers that eat a week if you do not have the number.

Important YMYL caveat: having a tax ID is not automatic proof that you are a tax resident, and tax residency is not the same as immigration residency. Days-count rules, center-of-life tests, and local filing triggers vary by country. This page is a naming and orientation guide — not personal tax advice. Individual situations need a consultation and, when warranted, a local accountant.

South America Tax IDs

Argentina — CUIT. The standard fiscal key for people and entities with tax activity. Employees also deal with CUIL for social security; some non-residents encounter a CDI. If you are opening accounts or forming a company, CUIT is the number that shows up on AFIP-facing paperwork.

Bolivia — NIT. Número de Identificación Tributaria via SIN. Required once you operate formally — invoicing, company activity, and many contracts.

Brazil — CPF (individuals) / CNPJ (companies). The CPF is one of the highest-demand numbers we process for foreigners. It is used far beyond pure tax: banking, real estate, investment platforms, and consumer services. See our full guides: Brazil CPF service and CPF for foreigners.

Chile — RUT. Rol Único Tributario through SII. For natural persons it usually matches the RUN national ID number — one number, many uses.

Colombia — NIT / RUT registration. Companies clearly use a NIT. Individuals are often identified by cédula once registered in DIAN’s RUT system. When a Colombian form asks for NIT, natural persons commonly enter their cédula number in the expected format.

Ecuador — RUC. Registro Único de Contribuyentes under SRI. Needed for formal economic activity and electronic invoicing.

Paraguay — RUC. The number that shows up the moment a client wants to invoice, formalize a business, or satisfy bank compliance after residency. We run a dedicated assistance path: Paraguay RUC assistance. Do not assume a Paraguay RUC works like a Peru or Panama RUC — only the acronym is shared.

Peru — RUC. SUNAT’s taxpayer registry. Essential for facturas and formal business; different process and obligations from Paraguay despite the same letters.

Uruguay — RUT. DGI’s Registro Único Tributario for entities and individuals with economic activity. Day-to-day identity is still the cédula (CI); RUT appears when tax registration matters.

Venezuela — RIF. Registro de Información Fiscal under SENIAT — the primary fiscal ID for taxpayers and companies.

Central America & Mexico Tax IDs

Mexico — RFC. Registro Federal de Contribuyentes through SAT. This is the number that matters for tax registration, many bank relationships, and SAT-linked processes. Pair it mentally with CURP (identity), not as a synonym. Assistance: Mexico RFC tax ID assistance.

Belize — TIN. Tax Identification Number issued by the Belize Tax Service. English-language paperwork, still a formal fiscal registration — required for taxable income, business activity, and many importer/compliance contexts.

Costa Rica — cédula / DIMEX / NITE. Costa Rica does not hand every foreigner a single branded acronym like “RFC.” Nationals use the cédula; legal residents typically use DIMEX as their identification number in DGT systems; non-residents who need a tax number often obtain a NITE. Companies use a cédula jurídica. Package path: Costa Rica tax ID / tax residency package.

El Salvador — NIT. Número de Identificación Tributaria for tax registration and formal commercial activity.

Guatemala — NIT. SAT’s standard fiscal ID for persons and companies — the number that shows up on tax and many notarial processes.

Honduras — RTN. Registro Tributario Nacional. Distinct acronym in Central America (not NIT/RUC) — easy to miss if you are copying a “one TIN name for the region” cheat sheet.

Nicaragua — RUC. Another Registro Único de Contribuyentes system. Treat process, filing load, and banking expectations as Nicaragua-specific.

Panama — RUC. DGI taxpayer registration, frequently tied to company setup and formal activity. Panama banking and company work almost always collide with RUC requirements — plan the ID step before you assume an account opens on passport alone.

Caribbean Tax IDs (MLL Scope)

Cuba — NIT. Número de Identificación Tributaria under ONAT for tax registration. Expect formal registration whenever taxable economic activity is in scope.

Dominican Republic — RNC. Registro Nacional de Contribuyentes via DGII. Companies receive a distinct RNC. Individuals often use the cédula as their tax identification number once registered as taxpayers. Foreigners without a Dominican cédula commonly need the RNC path for formal activity.

The RUC Trap: Same Acronym, Five Different Countries

Here is the insight most generic “LatAm tax ID” lists skip: RUC is not a regional standard. It is a shared Spanish acronym that appears in Paraguay, Peru, Ecuador, Panama, and Nicaragua — each with its own tax authority, format rules, electronic-invoice stack, and compliance burden after registration.

We see the same confusion with NIT (Colombia, Bolivia, El Salvador, Guatemala, Cuba) and RUT (Chile vs Uruguay). If someone tells you “just get a RUC,” the only correct follow-up is: which country? A Paraguay RUC decision is often tied to residency + banking + optional invoicing. A Peru RUC is a SUNAT registration with its own facturación rules. They are not portable and they are not equivalent obligations.

Where MyLatinLife Helps Today

We already productize the highest-demand tax ID paths:

• Brazil CPF — personal tax/person registry for foreigners and non-residents
• Mexico RFC — SAT registration assistance
• Paraguay RUC — tax registration for clients who need to operate formally
• Costa Rica tax ID package — tax ID + related residency/banking stack

For Argentina CUIT, Chile RUT, Colombia NIT/RUT, Peru RUC, Panama RUC, Dominican RNC, and the rest of the table, start with a consultation. We will tell you whether you need the tax ID now, after residency, or only if you plan to invoice or buy property — and whether a local accountant should own the filing side.

Use the country guides linked here to learn how to get each number, who qualifies, and what it unlocks.

FAQ: Latin America Tax IDs

What is the tax ID in Mexico?

Mexico’s tax ID is the RFC (Registro Federal de Contribuyentes). CURP is identity registry, not a substitute for RFC when SAT registration is required.

What is Brazil’s tax ID number?

Individuals use the CPF. Companies use a CNPJ. Foreigners often need a CPF for banking, property, and digital services even before long-term residency.

What is a RUC in Latin America?

RUC usually means a single taxpayer registry number. Paraguay, Peru, Ecuador, Panama, and Nicaragua all use the label — but each is a different country’s system with different post-registration obligations.

Is a tax ID the same as a cédula?

Sometimes in practice (Chile, parts of Colombia and the Dominican Republic), often not (Mexico RFC vs CURP, Brazil CPF vs RG, Uruguay RUT vs CI). Always confirm which acronym the bank or notary wants.

Do seasonal expats need a local tax ID?

Often yes for banks, leases, and utilities — even without becoming a tax resident. Tax residency is a separate legal question. Getting an ID can create filing expectations once activity starts; get country-specific advice.

Which tax IDs can MyLatinLife help with?

Live product paths today: Brazil CPF, Mexico RFC, Paraguay RUC, and Costa Rica tax ID package. Other countries: book a call and we will scope what you actually need.

Related: Brazil CPF · CPF for Foreigners · Mexico RFC Assistance · Paraguay RUC Assistance · Costa Rica Tax ID Package · Country Tax Comparison · Latin American Countries