Before you start

A passport, and (for a real bank account) a DNI or at least a CUIL/CDI obtained via ANSES/ARCA with a residencia precaria
Crisp, unmarked, new-series US$100/$50 bills if you plan to bring physical cash
A no-foreign-transaction-fee Visa/Mastercard from home (it now gets ~MEP rate at terminals)
A local Argentine mobile number + an address, which fintech apps ask for at sign-up

Step-by-step

1
Understand the rate landscape (it just changed)
Historically Argentina had a wide gap between the official rate and the informal 'dolar blue', plus the legal 'dolar MEP' (you buy a bond in USD and sell it for pesos through a broker) and the 'dolar tarjeta' card rate. Since the cepo was lifted for individuals in April 2025, that gap has collapsed to roughly 2-5%. As a newcomer you'll mostly transact at this near-unified rate via your card or by selling USD cash — the old arbitrage game is largely over.
OnlineWho: YouRead up before you arrive
2
Bring money in: USD cash, Western Union, or crypto
Bring crisp, new-series, unmarked US$100/$50 bills — cuevas and casas de cambio reject worn, torn, marked, or pre-2013 notes and pay less for small bills. Western Union remains a clean expat hack: send to yourself online and pick up pesos at a near-blue (CCL-referenced) rate, though queues can run over an hour. USDT/crypto cashed out via local P2P or exchanges (e.g. Lemon, Belo, Ripio) is a common workaround. With rates now converged, simply paying on a foreign card is often the easiest option.
In personWho: YouSame day (WU pickup / cambio)WU/MEP/cueva spreads of low single-digit %; airport kiosks are worst
3
Get a CUIL/CDI (the gate to everything financial)
A tax/ID number is what unlocks a real account. Once you start residency you get a residencia precaria; with it and your passport you obtain a CUIL (for workers) at ANSES, or a CDI (Clave de Identificacion, for those without residency yet) at an ARCA/AFIP office. A DNI for foreigners follows from your residency grant at Migraciones. Without one of these, banks will turn you away.
In personWho: YouCUIL/CDI same day to a few days; DNI weeksFree (CUIL/CDI)
4
Open a fintech wallet, then a bank account
Fintechs are far less bureaucratic: Mercado Pago, Uala, and Brubank can be opened from your phone once you have a CUIL/CDI (some accept passport-only for basic use, but a tax ID unlocks full features). For a traditional 'caja de ahorro' at Galicia, Santander, BBVA or Banco Nacion you'll typically need a DNI (or CUIL/CDI + precaria) plus proof of address; public banks must offer a migrant savings account to anyone showing passport + CUIL + address.
Mobile appWho: YouFintech: minutes-days. Bank: a branch visit + daysFintech accounts free; banks usually free basic savings
5
Day-to-day: CVU/CBU/alias and cash habits
Local transfers run on the CBU (22-digit bank-account key), the CVU (22-digit fintech-wallet key), and an alias (a short memorable handle like 'mi.casa.pesos') — people share the alias and money lands instantly. Mercado Pago QR is accepted almost everywhere. Still carry cash: many small vendors are cash-only, change is scarce (expect '¿tenes cambio?'), and paying USD cash near the blue rate is common for rent and big items.
Mobile appWho: YouOngoing

Documents you’ll need

Passport (and DNI for foreigners once you have residency)
CUIL or CDI number (tax/ID key the bank needs)
Residencia precaria (proof you've started the residency process)
Proof of local address (utility bill, lease, or affidavit) for bank onboarding

Things most newcomers don’t know

The famous blue/official gap has largely closed — but pick your rate deliberately.

Pre-2025 the blue could be ~2x the official rate; since the cepo was lifted in April 2025 the official, MEP and blue rates sit within ~2-5%. The practical move now is to pay on a foreign card (auto near-MEP) and always choose ARS, never USD, at checkout to avoid your bank's markup.

Source: BCRA exchange-rate-band regime + 2026 expat finance guides

Western Union is the long-time expat hack — but its edge has shrunk.

Sending money to yourself via WU and collecting pesos has historically beaten the official rate (it references the CCL/blue level). It still works and helps for larger sums, but with card rates now fair, the convenience of just tapping a card usually wins for everyday spend.

Source: Western Union AR + expat guides

You can't open a real bank account as a tourist — fintechs are the workaround.

A 'caja de ahorro' needs a DNI or at least a CUIL/CDI + residencia precaria, which tourists don't have. Mercado Pago, Uala and Brubank open from your phone with far lighter requirements once you have a tax ID, giving you a CVU, a card, and QR payments while your residency is still in progress.

Source: Argentine bank requirements + Buenos Aires Herald

The cepo is easing, not fully gone — and the rate still moves.

April 2025 freed individuals to buy USD without limits and put the peso in a floating band; some corporate/dividend rules lingered longer. The blue still ticks up at times, so treat 'the gap is gone' as today's reality, not a permanent guarantee.

Source: BCRA Phase 3 communique (April 2025) + 2026 market reports

Common mistakes to avoid

Changing money at the official airport/bank counter or letting a merchant bill you in USD — both quietly cost you the best available rate; always pay in ARS.
Bringing worn, torn, marked, small, or pre-2013 USD bills — cuevas and casas de cambio reject them or pay a discount; only crisp new-series $100/$50 get full value.
Holding a big peso balance through high inflation — locals convert salary to USD fast; idle pesos lose value week over week.
Assuming you can walk into Galicia or Santander and open an account as a tourist — without a DNI or CUIL/CDI + precaria you'll be turned away; sort the tax ID first.

Make it your personal checklist

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