If you travel through Latin America (and beyond), sooner or later you’ll come across the term blue dollar and the gap between the “official” and “unofficial” exchange rates of the US dollar against the local currency. It can be a confusing landscape at first, but once you understand it, it can save you a lot of money.
This article briefly explains the background – why these exchange-rate gaps appear in the first place – and then gets practical, drawing on our own experiences in three different countries where we swapped euros or dollars for local cash using the “blue rate”.
You’ll also find a bullet-point recap of the key takeaways at the end, plus one specific tip that’s genuinely useful when making the most of the blue rate.
Why some countries have multiple exchange rates
In some countries, the state regulates the exchange rate of the domestic currency against the US dollar. The aim is usually to protect foreign reserves, keep the currency stable, control inflation, or limit capital outflows.
The result is an official rate set by the central bank. That rate is often far removed from the currency’s real market value. If people and businesses can’t legally buy dollars at the official rate – or only in very small amounts – then, as with any form of economic control, a parallel, unofficial market naturally appears.
This is where the term blue dollar comes in.
What is the blue dollar
The blue dollar refers to the unofficial, market-driven exchange rate for the US dollar. It’s best known in Argentina, where it’s called dólar blue, but similar mechanisms exist elsewhere.
The blue dollar operates outside the formal banking system. Its rate reflects actual supply and demand and is typically far better for travelers than the official rate. In practice, that often means you’ll get tens of percent more local currency – in extreme cases even more than double – compared with an official exchange.
Pros and cons for travelers
For travelers, the main advantage is clear: a much better exchange rate. Accommodation, food, transport, and services end up costing noticeably less than official prices or bank rates would suggest. That can mean traveling more comfortably – or for longer – without slashing your standards.
There are downsides, too. It can be tricky at first to grasp why multiple rates exist and which one makes sense in a given situation. Rates can shift quickly, and any unofficial exchange involves the risk of scams or unfair practices. In some countries, using the blue rate puts you in a legal grey area – generally tolerated, but not officially endorsed.
So the rule of thumb is simple: get the good rate, but keep your wits about you.
Our firsthand experiences
Paraguay
Paraguay isn’t a country where you’d normally run into blue-dollar exchanges, but it was the first country in Latin America where we tried swapping money on the street with local money changers.
It happened in downtown Asunción, at the corner of Palma and Chile. Ironically, there’s also a bank here – Banco de la Nación Argentina – but the area is teeming with local money changers all the same. You barely have to do anything; they quickly spot you as a tourist and approach with an offer.
The fact that all this unfolds under the eyes of police officers posted on almost every corner hardly needs saying.
First, we swapped dollars for Paraguayan guaraní. It went smoothly, and we saved a few percent versus the official rate. Since Argentina was next on our route, we then tried exchanging our remaining euros for Argentine pesos. We knew it was an unusual ask, but we wanted to try.
The money changer – an older gentleman – pulled out a calculator and after a moment showed us his rate. It was almost identical to the official one, so we walked away. The whole exchange was friendly; the only real barrier was language. We ended the conversation, said thanks, and moved on.
Our first street exchange was, overall, a positive experience.
Argentina
When we visited, Argentina was a textbook case of the blue dollar in action. The country was battling extreme inflation; prices of goods and services were climbing week after week, and the gap between the official and unofficial rates was huge. It affected practically everything – from hotel prices to routine grocery runs.
We knew about the situation beforehand and tried to prepare. Even so, we ran into complications on the ground that forced us to dig into the exchange topic much deeper than planned. The result was a set of valuable – if not always pleasant – lessons.
Because the blue dollar is an unofficial rate, all official payments – by card or via a bank exchange – follow the official rate, which is far worse for visitors. In most cases, it makes little sense to pay by card or to swap dollars or euros in banks.
The big exception is Western Union. It’s a formal financial institution, but in practice its exchange rate comes close to the blue rate. We used it actively and, before arriving in Argentina, sent several transfers to ourselves.
When setting up a transfer, the app clearly showed the rate at which it would be executed. Euros left our account and, once in Argentina, we collected cash in Argentine pesos. There are caveats, though. Western Union branches are concentrated in larger cities and, in an economy as distorted as Argentina’s was at the time, they’re often overwhelmed. Long lines and cash shortages were common.
Our first serious problem came in Córdoba, when one of our Western Union transfers couldn’t be withdrawn due to a system error – the reason remains a mystery. Even with my passport and matching recipient details, the clerk said the system wouldn’t allow the payout. She contacted tech support, but no luck. The transfer stayed “stuck” until our trip ended. We did get the money back later, but the temporary shortfall caused more headaches.
After that, we had to exchange directly on the street with street money changers (cambistas, cambio). Because we’d counted on Western Union, we didn’t have much cash in dollars – just a little USD and the rest in euros. Which was another complication, since dollars are clearly preferred in Argentina.
Our first street swap was helped along by a Hertz car-rental employee in Salta. When his manager heard we planned to change money on our own, he offered to “escort” us. The employee came with us, and the whole exchange happened at a table on Plaza 9 de Julio. We traded euros at a very favorable rate and, from that moment on, it felt like we were buying things in Argentina for half price.
Our second and final exchange was again in Córdoba, this time on Plaza San Martín, and without a “bodyguard”. The first changer led us into a small arcade to a glass window, likely her colleague. He refused to place the pesos in the window before we handed over our euros. That immediately set off alarm bells. I slipped the money back into my pocket, we thanked them, and walked away.
A few minutes later another changer approached and swapped our euros openly, right there on the spot, for Argentine pesos. No pressure, no strange maneuvers. Maybe we were overly cautious, but in situations like this there’s a simple rule: if the other side’s behavior raises doubts, it’s best to step away.
In Argentina – and likely in other countries with similar systems – the presence of street changers (cambistas, cambio) is directly proportional to city size. In places like Córdoba or Salta you’ll encounter them on most busy streets; in rural areas, finding someone willing to trade can take a lot of searching.
Bolivia
Bolivia is another example of a country where state interference in markets goes quite far. The situation isn’t as extreme as in Argentina, but the gap between official and unofficial rates is still noticeable.
Unlike Argentina, exchanging at the better, blue rate in Bolivia is common and broadly tolerated. In practice, you don’t need to look for street dealers – you can walk into a regular exchange office and agree on a rate. If you don’t like the offer, head to the next one.
We had no trouble changing dollars this way in Santa Cruz de la Sierra, in the streets near Plaza Metropolitana 24 de Septiembre.
We also had an interesting experience in a much smaller town on the Altiplano – San Pedro de Quemes. We weren’t expecting success there. It took some door-to-door asking around, but ultimately we pulled it off: in a local restaurant we arranged a meeting with two buyers who took our dollars at a very good rate against the boliviano (BOB).
To round things out, we also tried Western Union in Bolivia, in Tarija. It was quick: in the evening I sent myself money via the Western Union app, and the next morning I picked it up at a local branch. The only hiccup was that the clerk asked for a passport photocopy. I got it done at a nearby copy shop – and there were plenty of those around, by the way.
Where you’ll encounter the blue dollar
A multi-tier currency setup – with an unofficial market running alongside the official rate – exists or has existed in places such as:
- Argentina – the long-standing, best-known case (official rate vs. dólar blue),
- Bolivia – a state-regulated rate and a growing parallel market,
- Venezuela – a historically extreme case with multiple rates,
- Cuba – a mix of official and unofficial rates,
- Iran, Egypt, Nigeria – examples beyond Latin America.
The situation can change month to month, so it always pays to check the current state before you travel. As a rule, the more state-controlled and economically troubled a country is, the more likely you’ll find a blue (unofficial) rate.
Conclusion
The blue dollar – and the gap between official and unofficial rates – isn’t some exotic concept. It’s a day-to-day reality in countries with regulated monetary systems. For travelers, it can be both an opportunity and a trap.
Understand how the system works and you can travel far more cheaply. Ignore it and you may overpay. The essentials are good information, common sense, and a willingness to adapt to local conditions. Which, in many ways, is what travel is all about.
Practical tips at a glance
- Before you go, always check the current exchange-rate situation for the dollar or euro versus the local currency and whether there’s a gap between official and unofficial rates.
- If you’re heading to a country with a blue rate, take enough cash. Ideally carry US dollars, and always respect official cash-import limits.
- Avoid paying by card or online. Pay whatever you can in local-currency cash that you obtained at the better rate.
- If you exchange on the street, stay mindful of safety. Avoid suspicious people, high-pressure situations, and any setup that makes you uneasy.
- Only take out the amount you intend to exchange. Don’t give the impression you’re carrying large sums.
- Where possible, opt for more official and safer options such as Western Union or brick-and-mortar exchange offices.
- Do your exchanges in larger cities. In rural areas, exchange services may be unavailable or very limited.
- Bonus tip: Bring a suitable, easy-to-spot bag for your local cash. Thanks to the favorable rate and high-denomination banknotes, a relatively small amount of dollars can turn into a very bulky pile of cash that won’t necessarily fit in your pockets or wallet.