Price Indexation Calculator
Index a contract value between any two periods using Eurostat HICP inflation data.
Source: Eurostat · Rolling — monthly series · last verified 2026-08-29
How price indexation works
Price indexation adjusts a historical value to account for inflation between two periods. The calculation uses the Eurostat Harmonised Index of Consumer Prices (HICP), a standardised measure of consumer price inflation across EU and EEA member states. Each country publishes a monthly index level with 2015 as the base year (index = 100 in 2015). To index a value, multiply it by the ratio of the target period's index to the base period's index: indexed value = original value × (target index ÷ base index).
This is the standard method used in commercial lease reviews, long-term supply contracts, legal damages calculations, and public procurement. The HICP "all items" (CP00) index is the most commonly cited benchmark for general indexation; it covers the full basket of consumer goods and services. Eurostat publishes a flash estimate around the end of each month and a final figure around the 17th of the following month — this calculator uses the final figures, refreshed on the 18th of each month.
Frequently asked questions
- What is the HICP?
- The Harmonised Index of Consumer Prices is a standardised measure of consumer price inflation published by Eurostat, comparable across EU and EEA member states, with 2015 set as the base year (index = 100).
- When should I use HICP vs national CPI?
- HICP is the cross-country comparable measure most commonly specified in EU-wide contracts, leases, and cross-border agreements. Some domestic contracts specify a country's own national CPI instead — check your contract's wording if in doubt.
- Why does the available data start at 2010?
- Eurostat HICP data exists before 2010, but this tool only loads 2010 onward. Contact support if you need earlier periods.
- What is CP00?
- CP00 is the HICP "all items" index — it covers the full basket of consumer goods and services, and is the most commonly cited benchmark for general indexation.
- Can I use this in my own app?
- Yes — every calculator on Stupidly Clever has a matching REST API and MCP tool that runs the same underlying logic.