- The cheapest electricity supplier in Belgium in June 2026 is Ecofix (~€1,243/year for 3,500 kWh).
- Price per kWh is not everything: also check the annual fixed fee and the contract type.
- Switching is free, with no outage and a notice of about one month — there is no risk in comparing.
- The ranking differs across Brussels, Wallonia and Flanders: compare by region.
The criteria that really matter
Choosing an electricity supplier means balancing four parameters. Ignore them and you overpay without knowing.
The price per kWh is the main item, but a high annual fixed fee (up to ~€88/year with some suppliers) can wipe out the benefit of a low kWh, especially if you use little.
The contract type sets your market exposure: a variable rate follows wholesale prices (often cheaper but moving), a fixed rate locks the price for 1 to 3 years (security, but a risk premium).
Source matters if you want green: require guarantees of origin, ideally Belgian (Ecopower, Bolt, DATS 24 produce locally).
Always compute the total annual cost (kWh × consumption + fixed fee), not just the headline price per kWh.
Our picks by profile
For a typical household of 3,500 kWh/year, here is what stands out in June 2026.
| Profile | Plan | Annual cost | Why |
|---|---|---|---|
| Tight budget | Ecofix — Flexy Online | ~€1,243/yr | The lowest rate on the market, variable, with a tiny €26.73/year fixed fee. |
| 100% green | Bolt — Plenty Variable | ~€1,363/yr | Green, locally sourced electricity with full producer traceability — a Belgian company. |
| Reliable nationwide | Luminus — BasicFlex Online | ~€1,283/yr | Variable, no commitment, national coverage and well-regarded customer service. |
Frequently asked questions
Which is the cheapest electricity supplier in Belgium?
In June 2026, Ecofix has the lowest rate (~€1,243/year for 3,500 kWh). The ranking changes monthly and depends on your region: compare before subscribing.
Fixed or variable rate?
Variable is usually cheaper but follows the market; fixed locks your price for 1 to 3 years for a small premium. In unstable times fixed reassures; otherwise variable often wins.
How do I switch supplier?
You contact your chosen supplier, who handles everything. The notice is about one month, with no termination fee and no power cut.
Is a green plan more expensive?
Not necessarily: several green plans are among the most competitive. Check the guarantees of origin, ideally Belgian, if local renewable sourcing matters to you.