Gas · Guide
Gas supplier in Belgium: how to choose well in 2026
In a gas-heated home, gas is the biggest item on the bill — often around 17,000 kWh a year. A few cents per kWh quickly add up to hundreds of euros.
The Belgian gas market in brief
As with electricity, the gas market is liberalised and regional. You freely choose your supplier; the grid operator (ORES, Fluvius, Sibelga) depends on your municipality. The main players are ENGIE, Luminus, TotalEnergies, Mega, OCTA+, DATS 24 and Ecofix.
What to check before signing
- The full annual cost — price per kWh + fixed fee. A slightly lower kWh with a €90/year subscription is not always a good deal.
- The contract type — fixed or variable. This is the most important parameter here, because gas is more volatile than electricity.
- Regional availability — some suppliers do not cover Brussels for residential customers.
Which gas supplier is cheapest in 2026?
For a typical household of 17,000 kWh/year, the June 2026 ranking is:
| Supplier | Plan | Annual cost |
|---|---|---|
| Ecofix | Flexy Online (variable) | ~€1,637 |
| Mega | Smart Fixed (fixed, 2 years) | ~€1,673 |
| ENGIE | Basic Variable | ~€1,676 |
Conversely, Luminus is among the most expensive (about €1,900/year): the annual gap exceeds €250. For the live picture by region, open the gas comparator or take the “which supplier” test.
Fixed or variable: the real 2026 debate
In May 2026, the gas price per kWh ranged from €0.048 to €0.077 depending on the plan. After a sharp spring rise then an easing, the CREG advises not to change contract in a rush. Our take: if you want to lock your heating budget, a 1-to-2-year fixed deal makes sense; if you tolerate variation, variable is often cheaper. Either way, compare before signing.
Switching gas supplier
It is free, with no outage, and the new supplier handles the cancellation. Have your EAN code and a meter reading ready. The full process is in our guide: switching energy supplier in Belgium.
Frequently asked questions
Which is the cheapest gas supplier in Belgium?
In June 2026, Ecofix offers the lowest rate, around €1,637/year for 17,000 kWh. Variable prices change monthly: check the current offer before subscribing.
Fixed or variable gas rate in 2026?
Gas is volatile. Fixed protects against a price spike for 1 to 2 years for a premium; variable follows the market and is often cheaper outside tense periods. In 2026, the CREG advises comparing without rushing before locking a fixed deal.
Does switching gas supplier cut my supply?
No. Your connection is never cut when switching, there is no termination fee, and the new supplier handles the paperwork.
