Compare two months of the Belgian health index
Pick a start month and an end month. The explorer shows the official Statbel health-index value for each, the percentage change between them and what that change would do to an amount that you type in, such as a rent or a contractual price. The calculation runs in your browser with a local snapshot of Statbel figures.
Index of what?
The tool is specifically about the Belgian health index (gezondheidsindex, indice santé) published monthly by Statbel, on the current base 2025 = 100. The health index is the consumer price index without alcohol, tobacco and most motor fuels. It is used for housing-rent indexation and in many contracts. It is not a generic salary-index calculator: wages in the public sector and social benefits use the separate smoothed health index and pivot-index mechanism, and sector salary indexation can follow collective agreements.
Worked example
In the bundled series the health index was 99.77 in September 2025 and 103.76 in September 2026. The change is 103.76 ÷ 99.77 − 1, which is +4.00%. An amount of €1,000 indexed over that period becomes €1,039.99, an increase of €39.99. The formula is always amount × new index ÷ old index.
How to read the result
- Percent change tells you the movement over the chosen period, whatever the amount.
- Indexed amount applies that factor to the example amount you entered.
- The month-to-month series can fall as well as rise, so a short period can show a small decrease.
The index values are a local snapshot of official Statbel data. For older months or later updates open Statbel's index search, and check the contract or law that applies to your indexation before relying on the number.
For rent, use the rent calculator
Rent indexation has its own rules for the base index month, the anniversary of the lease and regional conditions. For that use the Belgian rent indexation calculator. For interest on late payments or loans see the interest rate explorer, and for deadlines the working days calculator.
Frequently asked questions
What is the Belgian health index?
It is the consumer price index published monthly by Statbel without alcohol, tobacco and most motor fuels. It is used for rent indexation and in many contracts.
What is the current base year of the index?
The index uses the base 2025 = 100. Values from earlier base years are not directly comparable unless they are converted.
How do I index an amount with the health index?
Multiply the amount by the new index and divide by the old index. For example 1,000 euro with an index that rises from 99.77 to 103.76 becomes 1,039.99 euro.
Can I use this for salary indexation?
No. Public-sector wages and social benefits use the smoothed health index and the pivot index, and sector pay follows collective agreements.
Where do the index values come from?
From official Statbel figures, bundled as a local snapshot. Use Statbel for older months or later updates.