In 1923 the German papiermark became the most famous worthless currency in history. Within a single year the unit that had traded at about 4.2 marks to the US dollar before the First World War fell to roughly 4.2 trillion to the dollar, and the Reichsbank ended up printing a banknote denominated at one hundred trillion marks. The collapse ended on 15 November 1923, when a new currency — the Rentenmark — was issued at the deliberately humiliating rate of one Rentenmark to one trillion old paper marks, and the mark was re-stabilized at the prewar parity of 4.2 to the dollar, now carrying twelve additional zeros’ worth of erased savings.
The cause was not mysterious, and that is the point. Germany had financed the First World War almost entirely on credit, suspending the mark’s gold backing in 1914 and betting that the defeated enemy would pay the bill. Germany lost. The Treaty of Versailles (1919) and the London Schedule of Payments (1921) instead handed Germany a reparations obligation of 132 billion gold marks, and the government — unwilling or unable to cover its deficits with taxes — kept the printing presses running. When France and Belgium occupied the industrial Ruhr in January 1923 to extract reparations by force, Berlin funded a national strike of “passive resistance” the only way it knew how: by printing more money. That converted a fiscal problem into a catastrophe.
At the peak, in October 1923, prices rose at roughly 29,500% per month and doubled every few days. Workers were paid twice daily and ran to spend their wages before lunch made them worthless; banknotes were used as wallpaper, kindling, and children’s playthings because the paper was worth more than the number on it. The savings of an entire middle class — bondholders, pensioners, anyone who had trusted the mark — were annihilated, while debtors and holders of hard assets walked away enriched.
What stopped it was credibility, not collateral. The Rentenmark was notionally “backed” by a mortgage on German land and industry, a backing that could never have been redeemed; it held because it came with a believable promise to stop printing, a fixed quantity, and — in 1924 — the gold-backed Reichsmark and the American loans of the Dawes Plan behind it. The episode burned a fear of inflation into German policy so deep that it still shapes European central banking a century later.
In July 1946 the Hungarian pengő achieved a record no currency before or since has matched: a monthly inflation rate of roughly 41.9 quadrillion percent — 4.19 × 10¹⁶ percent — which the Guinness World Records office and the Hanke-Krus World Hyperinflation Table both certify as the highest ever measured. At that pace prices doubled about every 15 hours and the pengő shed 90 percent of its value roughly every four days. The episode ended on 1 August 1946, when Hungary replaced the pengő with a new currency, the forint, at the almost incomprehensible rate of 400 octillion pengő — 4 × 10²⁹ — to a single forint.
The pengő had once been a model of stability. Introduced in 1927 to retire Hungary’s earlier post-Habsburg hyperinflation (the korona), it was for a decade one of central Europe’s most dependable units. The Second World War destroyed that. Hungary entered the war on the Axis side, became a battleground as the Red Army drove the Wehrmacht west in 1944–45, and emerged with an estimated 40 percent of its national wealth ruined or carried off. On top of that ruin came the bill: the armistice and the 1947 peace settlement obliged Hungary to pay 300 million US dollars in reparations, chiefly to the Soviet Union, plus the running cost of supplying occupying Soviet forces. A wrecked economy with almost no tax base was ordered to produce hard value it did not have, and the provisional government did the only thing it could — it printed.
What followed was not a slow slide but a vertical drop. By mid-1946 the pengő was being issued in denominations that had to invent new prefixes — the milpengő (a million pengő) and the bilpengő or B-pengő (a million milpengő, 10¹² pengő) — and the largest note actually put into circulation read 100 million B-pengő, that is 10²⁰, one hundred quintillion pengő. A note for one billion B-pengő (10²¹) was printed but never released because the currency died first. To run the tax and accounting system at all, the state ran a parallel inflation-indexed unit, the adópengő (“tax pengő”), recalculated daily; by 31 July 1946 a single adópengő was worth 2 × 10²⁹ ordinary pengő.
The cure was a deliberate, foreign-supported reset. The forint was launched against a backstop of gold and foreign exchange — much of it Hungarian gold reserves returned from the West — and a hard commitment to balance the budget and stop monetizing the deficit. It worked, and it held: the forint that replaced the most worthless money in history is still Hungary’s currency today.
The Greek drachma was destroyed not to finance a war Greece chose to fight, but to pay for its own occupation. Between April 1941 and October 1944, German, Italian, and Bulgarian forces occupied the country and extracted “occupation costs” — funds to billet, feed, and supply their armies, plus forced loans the occupiers never intended to repay. With taxation impossible, exports requisitioned, and the economy in ruins, the Bank of Greece was made to cover those demands the only way left to it: by printing drachmae without limit. By October 1944, as German forces withdrew and the Greek government returned to Athens, monthly inflation reached roughly 13,800 percent — prices doubling about every four and a half days — a rate the Hanke-Krus World Hyperinflation Table ranks among the worst ever recorded. The largest banknote issued read 100,000,000,000,000 — one hundred trillion — drachmae.
The mechanism was brutally direct. The occupiers presented their bills; the Bank of Greece printed to meet them. The note circulation rose by a factor in the hundreds of millions over the occupation, while the real economy contracted. Money lost meaning so completely that Greeks abandoned the drachma in daily life altogether, pricing goods in gold sovereigns, olive oil, and British military scrip — anything that held value when the national currency would not.
Before the hyperinflation reached its peak, the occupation produced a catastrophe that dwarfs any monetary statistic. Requisitions of food by the occupying armies, combined with the Allied naval blockade and the collapse of distribution, caused the Great Famine of the winter of 1941–42. An estimated 300,000 Greeks died of starvation and malnutrition over the occupation, the worst of it in Athens and Piraeus, where the dead were collected from the streets each morning. The currency’s destruction and the famine shared the same root — an occupation that took what it wanted and left a population to absorb the loss.
The end came in stages. On 11 November 1944, just weeks after liberation, a stabilization led by the British adviser Sir David Waley introduced a new drachma at 50,000,000,000 — fifty billion — old drachmae to one new. That first reform failed to hold; inflation persisted, and a second, lasting stabilization came only with the 1953–54 reform, when Greece joined the Bretton Woods system and issued a further new drachma at 1,000:1. The drachma survived to become Greece’s currency until the euro.
The assignat was the paper money of the French Revolution, and like the Revolution it ended by consuming what it had created. Issued from 1790 against the vast estates seized from the Catholic Church and the crown, the assignat was meant to be the soundest paper imaginable — land cannot run away — and instead became one of history’s clearest demonstrations that backing is worthless without restraint. By 1796 prices had risen roughly five hundredfold over their 1790 level, the notes were trading at a few percent of face, and the Directory did what no reform could: it gave up. The printing plates were smashed and burned in a Paris square; the successor currency failed within months; and in 1797 both were formally demonetized and France returned to metal. The verdict is repudiation — a paper experiment abandoned, its holders left with kindling.
The cause was deficit finance dressed as financial engineering. Revolutionary France inherited a bankrupt monarchy’s debts and then took on the staggering cost of war against most of Europe after 1792, all while its tax-collection machinery had collapsed along with the old regime. The National Assembly’s solution was to nationalize the immense landholdings of the Church — the biens nationaux — and issue interest-bearing notes, the assignats, secured against the proceeds of selling that land. In principle each assignat would be retired as the land it represented was sold. In practice the temptation was irresistible: the assignats were converted into ordinary paper currency, interest was dropped, and the presses simply kept running far ahead of any land that was actually sold.
The over-issue did what over-issue always does. From a first emission of a few hundred million livres, the float swelled toward 45 billion. As confidence drained, the assignat’s depreciation accelerated into a true flight from money: in the worst stretch of 1795 it held perhaps a quarter of face value in the autumn and was in single digits by the spring, with workers demanding daily wages and racing to spend them before nightfall. The denominations climbed to match — a 10,000-franc assignat was authorized in January 1795 — the universal signature of a currency in free fall.
What ended it was the exhaustion of the trick, not a clever stabilization. The Directory destroyed the assignat presses in February 1796 and issued the mandats territoriaux, another land warrant, which began depreciating the day it appeared and lost roughly 85 percent of its value within five months. On 4 February 1797 the government demonetized both assignats and mandats, conceding that seven years of paper had ended in total failure. France ran on hard coin until Napoleon’s franc germinal (1803) restored a durable metallic standard. The episode left a fear of paper money so deep that France distrusted banknotes for generations.
The Soviet sovznak — the “Soviet token” ruble printed by the Bolshevik state from 1919 — was destroyed by the Russian Civil War and the doctrine of war communism, and it was retired in 1924 by the gold-backed chervonets and a hard monetary reform. It is the rare hyperinflation whose architects, for a while, regarded the collapse as a feature rather than a failure. As the presses devoured the value of money, leading Bolsheviks welcomed the prospect of a moneyless economy; war communism spawned, in one historian’s phrase, “fantasies of a moneyless economy,” and the runaway emission was read by some as the death of capitalism’s most basic instrument.
The mechanism was the oldest one in the book. Between 1918 and 1921 the new state fought a civil war against the Whites and foreign interventionists, requisitioned grain, abolished much of normal trade, and met its expenses by the limitless issue of paper. Industrial production collapsed by roughly 85% by 1920, the tax system disintegrated, and the only thriving enterprise — as the joke ran — was the manufacture of banknotes. Prices climbed by factors that defy intuition: by late 1923 the price level stood at hundreds of millions of times its 1913 base, and the government redenominated the currency twice (a new ruble for 10,000 old on 1 January 1922, then another for 100 on 1 January 1923) just to keep the arithmetic of daily life manageable.
By the measured peak in February 1924, consumer prices were rising at roughly 212% a month — prices doubling about every 18 to 19 days, per the Hanke-Krus World Hyperinflation Table — and the largest sovznak-era notes ran to 10 million rubles. What ended it was a deliberate reversal of doctrine. Under the New Economic Policy, a Sovnarkom decree of 11 October 1922 created the chervonets, a gold-backed bank note equal to the prewar 10-ruble gold coin (7.74232 grams of fine gold), at least a quarter of it covered by metal and hard currency. The chervonets circulated alongside the dying sovznak through 1923; in February 1924 it became the sole currency, and the government bought up the remaining sovznaks between 7 March and 10 May 1924 at a ratio of one gold ruble to 50,000 of the 1923 notes — and 50 billion of the original 1922-series rubles.
The reform held because it abandoned the fantasy. The “death of money” had not built socialism; it had paralysed an economy that still needed to count, trade, and save. The chervonets restored a unit people would hold, and the Soviet ruble that grew out of it lasted until 1947.
The Polish marka, the first currency of a nation reconstituted in 1918 after more than a century of partition, was destroyed by war finance and chronic deficits, and it was retired in 1924 by Władysław Grabski’s reform and the gold-backed złoty. Poland came into being broke. It had been carved out of the wreckage of three empires, its territory fought over and its industry shattered, and almost at once it had to defend its frontiers — most consequentially against Soviet Russia in the Polish–Soviet War of 1919–21. With no functioning tax base and a treasury that could not borrow at home or abroad on workable terms, the young state covered its deficits the way young broke states usually do: it printed marki.
The print run never stopped, and by the middle of 1923 ordinary inflation tipped into hyperinflation, with monthly price rises exceeding 50%. The peak came in October 1923, at roughly 275% a month on the Hanke-Krus World Hyperinflation Table. The collapse of the exchange rate tells the story in miniature: the marka traded at about 90 to the US dollar in 1919, around 17,800 by the end of 1922, and roughly 5,000,000 to the dollar by November 1923, climbing toward 9,300,000 by January 1924. The largest notes the state ever printed reached 10 million marek.
What stopped it was a reform of unusual self-reliance. In December 1923 the economist Władysław Grabski became prime minister while keeping the treasury portfolio, and in January 1924 the Sejm passed his currency-and-treasury reform. He balanced the budget largely through a property levy rather than the foreign loans he feared would buy political strings, founded the Bank of Poland (Bank Polski) as a joint-stock company meant to be independent of the treasury, and replaced the marka with the gold-based złoty at 1,800,000 marek to 1 złoty. The new unit was pegged at par with the Swiss franc. The currency was reborn alongside the nation’s solvency, and the złoty — battered and reformed many times since — is Poland’s money to this day.
The Spanish Republican peseta did not so much collapse as it was abolished. During the Civil War of 1936 to 1939, the country split into two monetary zones — a Republican zone administered from Madrid and a Nationalist zone administered from Burgos — and both printed money to wage the war. The Republic’s peseta inflated severely; by one estimate prices in Republican-held areas rose by as much as 1,500% over the war, against roughly 40% in the Nationalist zone. But the decisive blow was not inflation. It was a decree. With his victory complete on 1 April 1939, Francisco Franco’s regime declared that Republican-issued banknotes had no legal value, and the savings held in that money by people in the defeated zone were extinguished by law.
The split began at the war’s outbreak. After the July 1936 military uprising, the Bank of Spain effectively divided in two, and on 12 November 1936 the Nationalist authorities in Burgos issued a decree declaring invalid the Bank of Spain notes that had entered circulation in Republican territory after 18 July 1936 — the eve of the rising. From that point the two zones ran parallel monetary systems. The Republic, cut off from much of the country’s gold after the reserves were shipped abroad, financed its war effort by issuing money, and confidence in the Republican peseta drained as the Republic’s military prospects dimmed. The flight from the currency fed an inflation that grew worse the longer the war ran and the more clearly the Republic was losing.
When the war ended, the Nationalist state did not redenominate or rescue the Republican money. It repudiated it. Banknotes and coins issued under Republican authority lost their liberating power — their legal capacity to settle a debt — while the notes issued by the Burgos government continued to circulate. The practical consequence fell on ordinary people: anyone in the formerly Republican zone whose savings, wages, or pensions were denominated in the voided money found that the cash they held would no longer settle a debt or buy a meal. A monetary store of value was annulled by the stroke of a victorious government’s pen.
There was no reform that “fixed” this currency, because it was not allowed to survive to be fixed. The verdict on record is repudiation: money made worthless by decree and never redeemed for the people who held it on the losing side.