From what age can I take out a pension savings plan?

From 18 years old.

In addition, you must meet the following conditions:

• You must have Belgian nationality or be a resident of another European Economic Area (EEA) country.
• You must be subject to Belgian personal income tax. If you are subject to Belgian income tax as a non-resident, you can benefit from the tax reduction if at least 75% of your professional income is taxable in Belgium.