Installing or replacing a smart meter (if a meter was already present) is always free, as long as no additional work is required.
Is your meter being replaced because you’re a prosumer or have an electric vehicle charging station? In that case, the replacement is free unless adjustments are needed (such as a capacity upgrade).
The costs of the large-scale rollout are included in the distribution fees and, just like with traditional mechanical meters, are shared among all Brussels residents.