Understanding Cumulative Inflation and Purchasing Power
Inflation measures the increase in consumer prices over time. When money remains uninvested without generating returns, its real purchasing power drops steadily, requiring more currency units in the future to purchase the same goods and services.
Official Statistical Methodology
Calculations are based on official annual average data published by the Spanish National Statistics Institute (INE):
- 2002–2025: Official annual average series in Base 2025 (INE series IPC318623).
- 1980–2001: Normalized linked historical series derived from official Base 1992 annual data (INE series IPC2404). Note that prior to 2002, values are linked factors rather than direct Base 2025 index levels.
- Cross-era comparison (2001–2002): The transition between historical eras is bridged using the official INE Base 2001 annual link (+3.5% official annual inflation rate between 2001 and 2002).
- 2026: Calculated using the provisional average of published months (January–July 2026).