Best fixed-rate electricity supplier

Do you want to know your electricity bill in advance, with no nasty surprise if the markets go wild? A fixed-rate contract is built for exactly that: it locks your kWh price for one or several years. The question is which supplier to choose, and whether it's worth it. Here is my comparison.

In short:

• A fixed rate locks your kWh price for one to three years: a predictable bill, but slightly more expensive on average.
• In 2026, variable contracts remain 15 to 20% cheaper than fixed ones for an average household.
• Engie, Luminus and Eneco offer solid fixed contracts; Mega is often the cheapest, fixed rates included.
• A fixed rate mainly suits tight budgets and people who refuse any surprise.
• Compare the total annual cost on the official comparators before signing.

For the full market picture, see our ranking of the best electricity suppliers.

What is a fixed-rate electricity contract?

A fixed-rate contract guarantees an identical kWh price for the whole duration of the contract. In practice, you sign up for one, two or three years, and the energy price written on your contract does not move, even if wholesale markets soar or collapse. It is the opposite of a variable contract, whose price is reindexed each month or quarter according to a market index. Careful, though: only the "energy" part is frozen. Network fees (set by your distribution grid operator), taxes and VAT keep evolving with public decisions. In the price grids I dig through every quarter, that is the nuance that surprises people most: a "fixed" rate never freezes 100% of the bill, only the part the supplier controls.

Which supplier offers the best fixed rate in Belgium?

The best fixed rate is the one with the lowest total annual cost for your consumption, and Mega often comes out on top. The Liège-based supplier, licensed by the CREG and the CWaPE, applies the same tight-price logic in fixed contracts that earns it good spots in the Test-Achats barometer. But it is not alone: Engie, the incumbent, offers a very complete fixed range (one, two or three years) reassuring for anyone who wants a large network; Luminus, the market number two, fields regularly competitive one-year fixed contracts; and Eneco showed a kWh between €0.1406 and €0.1690 in spring 2026 depending on the plan, which makes it credible on fixed rates. TotalEnergies rounds out the group of large players offering fixed contracts. Here are the indicative benchmarks to keep in mind (mid-2026 readings, to be checked for your region and consumption):

These benchmarks do not replace a simulation: the ranking changes depending on whether you live in Wallonia, Brussels or Flanders.

Fixed or variable rate: which is cheaper today?

On average, variable is cheaper than fixed today. In 2026, variable contracts come out roughly 15 to 20% below fixed contracts for a typical household consuming 3,500 kWh a year, a gap confirmed both by comparator readings and by Test-Achats analyses. The reason is simple: by fixing your price, the supplier takes on the risk of market moves, and it charges that risk as a premium. A fixed rate therefore behaves like insurance: you pay a little more in exchange for peace of mind. The case I see most often: a household signs a fixed contract at the top of the cycle, out of fear of a rise, and ends up above the market when prices fall back. Conversely, a fixed rate signed just before a spike becomes an excellent deal. Nobody can predict the markets — which is exactly why the choice depends first on your risk tolerance, not on a bet on prices.

Who really benefits from a fixed rate?

A fixed rate is made for those who value a predictable budget above all. If your income is tight or steady — a household on a planned budget, a retiree, someone who manages money to the month — knowing exactly what electricity will cost all year is often worth the small premium. It is also the right choice for anyone who simply does not want to watch the energy market or re-compare every quarter. Conversely, if you accept your bill rising and falling in order to pay less on average, and you are willing to re-compare once a year, a variable rate will suit you better. A third profile exists: heavy consumers who steer their usage (an electric car, a home battery) can look at a dynamic contract, indexed by the hour — but that is another debate, reserved for smart meters and very active profiles.

How can you compare fixed-rate offers without getting it wrong?

Compare the total annual cost, never the headline kWh price alone. A fixed rate can look attractive per kWh while hiding a high fixed fee, or the other way round. The only reliable way to decide is to use the official regulator comparators, free and ad-free: the CREG comparator at federal level, the VREG V-Test in Flanders, CompaCWaPE in Wallonia and Brugel in Brussels. Enter your real consumption (from your last bill, with your EAN code): the tool calculates the full annual cost, including energy, standing charge and taxes, and shows you where each fixed offer sits. I have compared hundreds of contracts this way, and the finding is constant: an isolated kWh price misleads one time out of two. Also check the commitment term and what happens at expiry, because an unrenewed fixed contract often rolls over automatically to a variable offer.

Can you cancel a fixed contract before its term?

Yes, free of charge and at any time. This is something many Belgians don't realise: for a household, any energy contract, fixed or variable, can be cancelled with just one month's notice and no exit penalty. The law protects the residential consumer — you are never trapped in your fixed rate until expiry. In practice, you sign up with the new supplier using a recent bill, and it is the new supplier that notifies the old one and organises the switch, without any interruption. The physical network, run by your distribution grid operator (Ores, Fluvius, Resa or Sibelga depending on your municipality), does not change: electricity keeps flowing. In other words, signing a fixed contract does not lock you in: if the market falls durably, you can move to a better offer the following month.

In short, a fixed-rate contract is for those who value predictability over maximum savings. It costs a little more than variable on average in 2026, but it shields you from spikes. On the supplier side, Mega often leads on price, while Engie, Luminus and Eneco offer solid, readable fixed contracts. Before signing, always check your specific case on the CREG, VREG or CWaPE comparator, and compare the whole market in our ranking of electricity suppliers.