In this review, we explain in clear language where Eneco scores strongly and what points of interest you should take into account before choosing this gas Eneco Gas Flex One.
Tip! Compare Eneco Gas Flex One with its competitors.
Evert E. — Energy expert
| 1-2 people | €72 /mo |
| 3-4 people | €200 /mo |
| 5+ people | €296 /mo |
| Type of tariff plan | Indexed price |
| Customer service | By phone and online |
| Billing options | Digital or on paper |
| Payment method | Bank transfer or direct debit |
| Fixed fee | €50 /yr |
| Gas usage fee | c€7.56 /kWh |
| Contract duration | 1 year |
| Notice period | 1 month |
| Available in | Flanders & Wallonia |
| Target audience | Consumer |
| Tariff card | October 2026 |
Overview of current promotions and offers from Eneco Gas Flex One.
Currently, we don't have a record af any promotions or discounts for Eneco Gas Flex One. Some providers opt to simply offer their best offer already by default, without the fine print and promotional conditions.
Evert E. — Energy expert
Eneco Gas Flex One is a variable rate. We always make the best possible estimate of the annual price of each contract. We calculate these according to the expected energy prices for the next 12 months. However, prices may change due to changing market conditions or government decisions. The price calculation is based on october 2026 tariffs.
Evert E. — Energy expert
To make all these tariffs and prices a bit more tangible, you will find here an estimate of advance payment amount and final bill for each different consumption profile.
Gas: 7.560 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 50,00 |
|
Verbruikskost gas
|
€ 571,54 |
| Subtotaal | € 621,54 |
| Taksen en Heffingen | |
| Subtotaal | € 82,62 |
| Netkosten bij Fluvius Antwerpen | |
| Subtotaal | € 164,14 |
| Jaartotaal | € 868,30 /jr |
| Gem. per maand | € 72,36 /mnd |
Gas: 23.260 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 50,00 |
|
Verbruikskost gas
|
€ 1.758,46 |
| Subtotaal | € 1.808,46 |
| Taksen en Heffingen | |
| Subtotaal | € 264,35 |
| Netkosten bij Fluvius Antwerpen | |
| Subtotaal | € 332,20 |
| Jaartotaal | € 2.405,00 /jr |
| Gem. per maand | € 200,42 /mnd |
Gas: 34.890 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 50,00 |
|
Verbruikskost gas
|
€ 2.637,68 |
| Subtotaal | € 2.687,68 |
| Taksen en Heffingen | |
| Subtotaal | € 401,93 |
| Netkosten bij Fluvius Antwerpen | |
| Subtotaal | € 456,68 |
| Jaartotaal | € 3.546,29 /jr |
| Gem. per maand | € 295,52 /mnd |
Gas: 7.560 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 50 |
|
Gasprijs
|
€ 571,54 |
| Subtotaal | € 621,54 |
| Taksen en Heffingen | |
| Subtotaal | € 83,19 |
| Netkosten bij ORES Hainaut | |
| Subtotaal | € 320,21 |
| Jaartotaal | € 1.024,93 |
| Gem. per maand | € 85,41 |
Gas: 23.260 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 50 |
|
Gasprijs
|
€ 1.758,46 |
| Subtotaal | € 1.808,46 |
| Taksen en Heffingen | |
| Subtotaal | € 266,09 |
| Netkosten bij ORES Hainaut | |
| Subtotaal | € 692,52 |
| Jaartotaal | € 2.767,07 |
| Gem. per maand | € 230,59 |
Gas: 34.890 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 50 |
|
Gasprijs
|
€ 2.637,68 |
| Subtotaal | € 2.687,68 |
| Taksen en Heffingen | |
| Subtotaal | € 404,54 |
| Netkosten bij ORES Hainaut | |
| Subtotaal | € 968,31 |
| Jaartotaal | € 4.060,54 |
| Gem. per maand | € 338,38 |
VAT included. Monthly, annual and one-off charges are settled on a monthly basis.
How has the price of Eneco Gas Flex One evolved over the past period? Has the price increased, or has the kwh price decreased? And how does Eneco Gas Flex One compare with other tariffs in the market?
VAT included
Eneco is an energy supplier active in Belgium, offering electricity, natural gas and dual fuel plans for private customers and businesses. The company is also involved in electric mobility, with charging solutions and a charge card for use at public charging points. Eneco places a clear focus on renewable energy and on digital tools that help customers track their energy use. This makes Eneco suitable for people who want to combine energy supply with practical online services and charging options for home, travel and work.
Forewarned is forearmed. Eneco Gas Flex One serves as the benchmark product in this comparison. In which areas does Eneco Gas Flex One outperform other gas only prices, and in which not so much?
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An energy rate card summarises the most important information about an energy contract, such as the type of contract (fixed, variable or dynamic), the price per kWh, the fixed fee, any indexation formulas, duration and termination conditions. You will also find information on discounts, green electricity, injection tariffs for solar panels, network tariffs and an estimate of the annual cost. Here you will find an overview of all current and past rate cards of Eneco Gas Flex One.
Below you will find answers to the most frequently asked questions about Eneco Gas Flex One. Is your question not listed? Feel free to contact us.
Yes, Eneco Gas Flex One is a indexed tariff, i.e. the consumption price per kWh fluctuates every few month(s). The kWh price can therefore rise and fall during the term of your contract. However, the consumption price always follows the same market indexes using a fixed price formula. You can find all the price information and indexation formula in the tariff sheets.
When you switch suppliers, your new supplier Eneco takes care of everything. They will contact both your local grid operator and your previous energy supplier. Your switch usually follows 30 days after your request, but you can also choose a switch date yourself up to 6 months in the future. If you have requested a new connection or move, Eneco also takes care of everything, and then everything can be set up even faster.
Consumers are always entitled to a free cancellation period of 2 weeks after application. For this, you need to contact your new supplier yourself, or contact your current supplier and ask them to stop the switch. Business users are not entitled to 2 weeks' notice.
No, consumers in Belgium are still allowed to switch suppliers for free, and without giving any reason. You are not bound to a fixed contract duration. However, sometimes early termination means you lose your welcome discounts. We therefore advise you to remain a customer for at least one year before requesting an energy switch.
When the original contract term of 1 or 2 years is about to expire, Eneco will notify you. In this, they will offer you a new contract proposal with the same or similar tariff plan. This is the moment you should definitely come and compare your energy contract again on DareToCompare.be.
Eneco Gas Flex One is only available in Flanders & Wallonia, not in the other regions.
