In this review, we explain in clear language where Octa+ scores strongly and what points of interest you should take into account before choosing this gas Octa+ Boost Flex.
| Self-employed | €141 /mo |
| Office | €282 /mo |
| Shop | €706 /mo |
| Type of tariff plan | Indexed price |
| Customer service | By phone and online |
| Billing options | Digital only |
| Payment method | Bank transfer or direct debit |
| Fixed fee | €70 /yr |
| Gas usage fee | c€7.30 /kWh |
| Contract duration | Indefinite |
| Notice period | 1 month |
| Available in | Belgium |
| Target audience | Business |
| Tariff card | October 2026 |
If you order today, you will enjoy these promotions and discounts. Just make sure you adhere to the terms and conditions of the promotion. So be sure to pay your bills on time to avoid discussions afterwards.
Discount of €150.00
The discount is only granted after you have remained a customer for 12 consecutive months
Don't wait until the last minute!
Octa+ may end a promotion earlier than expected, or ask for additional information. You will receive the promotion that is available on the moment that your order has been completely finalized.
Evert E. — Energy expert
Octa+ Boost Flex 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: 20.000 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 70,00 |
|
Verbruikskost gas
|
€ 1.460,00 |
| Subtotaal | € 1.530,00 |
| Taksen en Heffingen | |
| Subtotaal | € 33,16 |
| Netkosten bij Fluvius Antwerpen | |
| Subtotaal | € 280,47 |
| Kortingen | |
|
Eénmalige korting
|
€ -150,00 |
| Subtotaal | € -150,00 |
| Jaartotaal | € 1.693,63 /jr |
| Gem. per maand | € 141,14 /mnd |
Gas: 40.000 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 70,00 |
|
Verbruikskost gas
|
€ 2.920,00 |
| Subtotaal | € 2.990,00 |
| Taksen en Heffingen | |
| Subtotaal | € 66,32 |
| Netkosten bij Fluvius Antwerpen | |
| Subtotaal | € 482,43 |
| Kortingen | |
|
Eénmalige korting
|
€ -150,00 |
| Subtotaal | € -150,00 |
| Jaartotaal | € 3.388,75 /jr |
| Gem. per maand | € 282,40 /mnd |
Gas: 100.000 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 70,00 |
|
Verbruikskost gas
|
€ 7.300,00 |
| Subtotaal | € 7.370,00 |
| Taksen en Heffingen | |
| Subtotaal | € 165,80 |
| Netkosten bij Fluvius Antwerpen | |
| Subtotaal | € 1.088,32 |
| Kortingen | |
|
Eénmalige korting
|
€ -150,00 |
| Subtotaal | € -150,00 |
| Jaartotaal | € 8.474,12 /jr |
| Gem. per maand | € 706,18 /mnd |
Gas: 20.000 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 70,00 |
|
Verbruikskost gas
|
€ 1.460,00 |
| Subtotaal | € 1.530,00 |
| Taksen en Heffingen | |
| Subtotaal | € 34,66 |
| Netkosten bij ORES Hainaut | |
| Subtotaal | € 580,39 |
| Kortingen | |
|
Eénmalige korting
|
€ -150,00 |
| Subtotaal | € -150,00 |
| Jaartotaal | € 1.995,05 /jr |
| Gem. per maand | € 166,25 /mnd |
Gas: 40.000 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 70,00 |
|
Verbruikskost gas
|
€ 2.920,00 |
| Subtotaal | € 2.990,00 |
| Taksen en Heffingen | |
| Subtotaal | € 69,32 |
| Netkosten bij ORES Hainaut | |
| Subtotaal | € 1.027,82 |
| Kortingen | |
|
Eénmalige korting
|
€ -150,00 |
| Subtotaal | € -150,00 |
| Jaartotaal | € 3.937,14 /jr |
| Gem. per maand | € 328,10 /mnd |
Gas: 100.000 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 70,00 |
|
Verbruikskost gas
|
€ 7.300,00 |
| Subtotaal | € 7.370,00 |
| Taksen en Heffingen | |
| Subtotaal | € 173,30 |
| Netkosten bij ORES Hainaut | |
| Subtotaal | € 2.370,12 |
| Kortingen | |
|
Eénmalige korting
|
€ -150,00 |
| Subtotaal | € -150,00 |
| Jaartotaal | € 9.763,42 /jr |
| Gem. per maand | € 813,62 /mnd |
Gas: 20.000 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 70,00 |
|
Verbruikskost gas
|
€ 1.460,00 |
| Subtotaal | € 1.530,00 |
| Taksen en Heffingen | |
| Subtotaal | € 33,16 |
| Netkosten bij Sibelga | |
| Subtotaal | € 356,07 |
| Kortingen | |
|
Eénmalige korting
|
€ -150,00 |
| Subtotaal | € -150,00 |
| Jaartotaal | € 1.769,23 /jr |
| Gem. per maand | € 147,44 /mnd |
Gas: 40.000 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 70,00 |
|
Verbruikskost gas
|
€ 2.920,00 |
| Subtotaal | € 2.990,00 |
| Taksen en Heffingen | |
| Subtotaal | € 66,32 |
| Netkosten bij Sibelga | |
| Subtotaal | € 660,29 |
| Kortingen | |
|
Eénmalige korting
|
€ -150,00 |
| Subtotaal | € -150,00 |
| Jaartotaal | € 3.566,61 /jr |
| Gem. per maand | € 297,22 /mnd |
Gas: 100.000 kWh
| Energiekost | |
|---|---|
|
Vaste vergoeding
|
€ 70,00 |
|
Verbruikskost gas
|
€ 7.300,00 |
| Subtotaal | € 7.370,00 |
| Taksen en Heffingen | |
| Subtotaal | € 165,80 |
| Netkosten bij Sibelga | |
| Subtotaal | € 1.572,97 |
| Kortingen | |
|
Eénmalige korting
|
€ -150,00 |
| Subtotaal | € -150,00 |
| Jaartotaal | € 8.958,77 /jr |
| Gem. per maand | € 746,56 /mnd |
No VAT included. Monthly, annual and one-off charges are settled on a monthly basis.
How has the price of Octa+ Boost Flex evolved over the past period? Has the price increased, or has the kwh price decreased? And how does Octa+ Boost Flex compare with other tariffs in the market?
Keep in mind that Octa+ regularly gives discounts to new customers. As a result, their kWh price is often even more interesting than "standard price". The kWh prices in the chart are the standard prices without discounts.
Evert E. — Energy expert
No VAT included
Octa+ is a Belgian energy supplier offering electricity, natural gas and dual fuel plans for private customers and businesses. The company is also active in fuels and mobility services, which gives Octa+ a broader profile than a standard energy provider. Customers can combine their energy contracts and use digital tools to manage administration and follow their account. Octa+ is mainly suited to households, self-employed people and companies looking for a Belgian provider for electricity, gas, or both through one supplier.
Forewarned is forearmed. Octa+ Boost Flex serves as the benchmark product in this comparison. In which areas does Octa+ Boost Flex outperform other gas only prices, and in which not so much?
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You can also combine Octa+ Boost Flex with other services from Octa+. This is often cheaper than purchasing each service separately.
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 Octa+ Boost Flex.
Below you will find answers to the most frequently asked questions about Octa+ Boost Flex. Is your question not listed? Feel free to contact us.
Yes, Octa+ Boost Flex 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 Octa+ 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, Octa+ 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, Octa+ 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.
Octa+ Boost Flex is available throughout Belgium.
When you want to order Octa+ Boost Flex, you will need to provide some personal data, such as your name, address, contact and connection details. In addition, you must comply with the applicable order requirements of the provider. Both DareToCompare.be and Octa+ treat your data carefully and securely, using them exclusively for the processing of your order.
Octa+ Boost Flex is a business product. You must hold a company VAT number, and be authorised by your company to place an order.
