1 000 000 Adópengő Tax note

The adópengő was a fiscal accounting unit introduced in January 1946 specifically to index tax obligations and public-sector transactions against inflation — itself a measure of how completely the regular pengő had collapsed. By mid-1946, Hungarian inflation was running at rates that remain unmatched in recorded monetary history, with prices doubling roughly every fifteen hours at the peak. The adópengő was recalculated daily against the pengő using a published index, meaning a 1,000,000 adópengő note's real value changed every single day it sat unspent.

Issued by the Postal Savings Bank rather than the National Bank, placing it outside the main currency system entirely. The forint reform of 1 August 1946 extinguished both the pengő and the adópengő simultaneously.