Amounts in earlier pesos were sometimes preceded by a "$" sign and sometimes, particularly in formal use, by symbols identifying that it was the specific currency in use at the time, for example "100" or "" for
pesos moneda nacional. The currency introduced in 1992 was called
peso convertible, simplified to just
peso in 2002. A value in pesos is written with a preceding "$" sign only. Earlier pesos replaced currencies also called peso, and sometimes two varieties of peso coexisted, making it necessary to have a distinguishing term to use, at least in the transitional period; the 1992 peso replaced a currency with a different name,
austral.
Peso before 1826 The
peso was a name often used for the silver Spanish eight-
real coin. Following
independence, Argentina began issuing its own coins, denominated in
reales,
soles and
escudos, including silver eight-real (or sol) coins still known as pesos. These coins, together with those from neighbouring countries, circulated until 1881.
Peso fuerte, 1826–1881 In 1826, two paper money issues began, denominated in pesos. One, the
peso fuerte (
$F) was a convertible currency, with 17 pesos fuerte equal to one Spanish ounce (27.0643 g) of 0.916 fine gold. It was replaced by the peso moneda nacional at par in 1881.
Peso moneda corriente, 1826–1881 The non-convertible
peso moneda corriente (everyday currency) (
$m/c) was also introduced in 1826. It started at par with the peso fuerte, but depreciated with time. Although the Argentine Confederation issued 1-, 2- and 4-
centavo coins in 1854, with 100
centavos equal to 1 peso = 8
reales, Argentina did not decimalize until 1881. The
peso moneda nacional (
m$n or
$m/n) replaced the earlier currencies at the rate of 1 peso moneda nacional = 8 reales = 1 peso fuerte = 25 peso moneda corriente. Initially, one peso moneda nacional coin was made of silver and known as patacón. However, the 1890 economic crisis ensured that no further silver coins were issued.
Gold and silver pesos, 1881–1970 The Argentine gold coin from 1875 was the gold peso fuerte, one and two-thirds of a gram of gold of fineness 900, equivalent to one and a half grams of fine gold, defined by Law no. 733 of 1875. This unit was based on that recommended by the European Congress of Economists in Paris in 1867 and adopted by Japan in 1873 (the Argentine 5 peso fuerte coin was equivalent to the Japanese 5
yen). However, these provisions were not implemented. The system before 1881 has been described as "monetary anarchism" (
anarquía monetaria). The design was changed in 1899, and again in 1942. Initially, the peso m$n was convertible, with a value of one
peso oro sellado. Convertibility was maintained off and on, with decreasing value in gold, until it was finally abandoned in 1929, when m$n 2.2727 was equivalent to one peso oro.
Peso ley, 1970–1983 The
peso ley 18.188 (
ISO 4217:
ARL) (informally called the
peso ley) replaced the previous currency at a rate of 1 peso ley to 100 pesos moneda nacional.
Peso argentino, 1983–1985 The
peso argentino (
$a) (
ISO 4217:
ARP) replaced the previous currency at a rate of 1 peso argentino to 10,000 pesos ley (1 million pesos m$n). The currency was introduced just before the return of democracy, on June 1, 1983. However, it rapidly lost its purchasing power, was devalued several times, and was replaced by a new currency called the austral in June 1985.
Austral, 1985–1991 The
austral ("₳") (
ISO 4217:
ARA) replaced the
peso argentino at a rate of 1 austral to 1,000 pesos (one billion pesos m$n). During the period of circulation of the austral, Argentina suffered from
hyperinflation. The last months of President
Raul Alfonsín's period in office in 1989 saw prices increase constantly (200% in July alone), reflected in a worsening exchange rate. Emergency notes of 10,000, 50,000 and 500,000 australes were issued, and provincial administrations issued their own currency for the first time in decades. The value of the currency stabilized two years after President
Carlos Menem was elected.
Peso convertible, since 1992 In 1992 a new peso (
ISO 4217:
ARS) was introduced, referred to as
peso convertible since the international
exchange rate was
fixed by the
Central Bank at 1 peso to 1
U.S. dollar, and for every
peso convertible circulating, there was a US dollar in the Central Bank's
foreign currency reserves. It replaced the austral at a rate of 1 peso = 10,000 australes. After the various changes of currency and dropping of zeros, one peso convertible of 1992 was equivalent to 10 trillion pesos moneda nacional of 1970. After the
financial crisis of 2001, the fixed exchange rate system was abandoned in January 2002, and the exchange rate fluctuated, up to a peak of four pesos to one dollar (a 75%
devaluation) at the time. The resulting
export boom produced a massive inflow of dollars into the Argentine economy, which helped lower their price. For a time the administration stated and maintained a strategy of keeping the exchange rate at between 2.90 and 3.10 pesos per US dollar, in order to maintain the competitiveness of exports and encourage
the replacement of imports by local industries. When necessary, the Central Bank issues pesos and buys dollars in the free market (sometimes large amounts, of the
order of 10 to per day) to keep the dollar price from dropping, and had amassed over in reserves before the payment to the
International Monetary Fund in January 2006. The effect of this may be compared to the neighboring
Brazilian real, which was roughly on par with the Argentine peso until the beginning of 2003, when both currencies were about three per U.S. dollar. The
real started gaining in value more than the peso due to Brazil's slower build-up of dollar reserves; by 29 December 2009, a
real was worth almost 2.2 pesos. In December 2015, US dollar
exchange restrictions were removed in Argentina following the election of President
Mauricio Macri. As a result, the difference between the official rate and the
unofficial "blue" rate almost disappeared for a time. The official exchange rate was on 1 April 2016 of 14.4 to . The rate gradually worsened; on 29 July 2022 one U.S. dollar was quoted at 131.22 pesos at the official rate and 298 pesos, 2.27 times higher (+127%), in unregulated markets. By September 2023, the official exchange rate had reached 350 pesos to the dollar, and over 720 pesos on unregulated markets. On 12 December 2023, following the election of president
Javier Milei, economy minister
Luis Caputo changed the official exchange rate to 800 pesos to the dollar from the previous 366.5, a devaluation of 54%. At the time, the unofficial exchange rate was around 1,000 pesos per dollar. This was followed by a monthly devaluation target of 2%, being afterwards lowered to 1% in February 2025 after inflation eased. From 14 April 2025 on, the official peso has operated within a
currency band of 1000 to 1400 pesos per dollar, as part of an agreement with the
International Monetary Fund. Since then, as a consequence of the liberalization of the currency market, the official and unofficial rates have remained close to each other. The upper limit of the trading band was breached in September and October 2025, triggering interventions by the Argentine central bank and the United States Treasury in the foreign exchange market, by buying pesos, to keep the exchange rate within the limits of the currency band. ==Coins==