What was the highest annual inflation rate recorded in modern Zimbabwe during its 2008 hyperinflation?

The highest annual inflation rate recorded in modern Zimbabwe during its 2008 hyperinflation was estimated at 89.7 sextillion percent. This extraordinary estimate describes one of the most severe episodes of hyperinflation ever documented.

Zimbabwe’s crisis developed after prolonged economic disruption, falling agricultural output, foreign-currency shortages, fiscal problems, and rapid money creation. Prices rose so quickly that ordinary transactions became difficult and the Zimbabwean dollar lost practical usefulness.

The number is often written as 89.7 sextillion percent, or approximately 8.97 × 10^22 percent. Estimates vary because normal price measurement becomes extremely difficult when prices change repeatedly within a day.

Zimbabwe eventually abandoned the Zimbabwean dollar for a multicurrency system in 2009. The episode is distinct from ordinary high inflation because hyperinflation involves an exceptionally rapid and self-reinforcing collapse in money’s purchasing power.