Money & Finance › Bubbles, crashes & crises › Hyperinflation: when a currency collapses
Weimar Germany hyperinflation (1923)
1921–1923· Crisis or event
Fact, law or dataA rule, statute, definition or measured number.
Germany's paper mark collapsed in 1923, when prices rose so fast that some workers were paid twice a day.
See it on the Money & Finance map →How it works
After World War I, Germany ran large deficits and owed reparations, set in 1921 at 132 billion gold marks. It covered the gap by printing money. When France and Belgium occupied the Ruhr industrial region in January 1923 over missed deliveries, the government paid striking workers with still more. By November one dollar cost about 4.2 trillion marks, against 4.2 in 1914. A new Rentenmark, swapped at one per trillion paper marks, ended it.
Why it matters
It wiped out middle-class savings while erasing debts, including many mortgages, and it remains a reason Germany and the European Central Bank put price stability first.
Think of it like
Like a lease fixed in a currency that loses half its value every few days: the landlord's rent becomes worthless and the tenant's debt vanishes.
Facts, rules and data
Reichsbank price and exchange-rate statistics, Adam Fergusson's 'When Money Dies' (1975), and photographs of banknotes used as wallpaper, kindling and children's building blocks.
Debates and risks
Historians debate whether Berlin let inflation run partly to dodge reparations, and how much 1923, versus the deflation of 1930–32, fed the Nazis' rise.
Connections (2)
▸Weimar Germany hyperinflation (1923) is the classic case of Hyperinflation: when a currency collapsesFact, law or data
The connection
Weimar Germany shows every step of the standard pattern: a government unable to tax or borrow enough after a war prints money, people dump cash as fast as they can, prices outrun the printing presses, and only a new currency backed by budget reform ends it.
When and why
Germany, 1921–1923; at the October 1923 peak, monthly inflation was about 29,500% and prices doubled roughly every four days.
How we know
Price and exchange-rate data from Reichsbank statisticians, analyzed in economist Phillip Cagan's classic 1956 study that defined hyperinflation as over 50% a month.
Debates and risks
Whether Weimar fits other cases is debated; it is often invoked in modern arguments about money printing, sometimes loosely.
▸Weimar Germany hyperinflation (1923) is cited as proof of Quantity theory of money (MV = PQ)Mainstream view
The connection
Germany's money stock exploded as the Reichsbank printed to cover war debts, reparations and support for strikers in the occupied Ruhr. Prices rose even faster than money, because people spent marks immediately, raising velocity. Monetarists cite it as the textbook case of money growth driving prices.
When and why
Germany, 1921–23; prices rose about 29,500% in October 1923 alone. It ended with the Rentenmark in November 1923.
How solid is the link?
Reichsbank money and price records, analyzed by Phillip Cagan (1956) and Thomas Sargent (1982), among others.
Debates and risks
Some historians stress reparations and the balance of payments as root causes, with printing a symptom; Sargent stressed fiscal reform in ending it.