Sainsbury’s Energy Review Summary
Last updated: 5th September 2025
At a Glance Summary
Sainsbury’s Energy, supplied by E.ON Next, offers a straightforward energy solution primarily aimed at loyal Sainsbury’s shoppers.
Its main selling point is the ability to earn thousands of Nectar points upon joining and double points on most in-store and online Sainsbury’s shopping.
All its electricity tariffs are backed by 86% renewable sources.
While not the cheapest supplier, its prices are competitive, and it boasts an impressive 72% customer score in the latest Which? energy survey.
However, its underlying supplier, E.ON Next, receives a more moderate 3.1 out of 5 from Citizens Advice.
This makes it a compelling option for those who want to get more value from their regular supermarket shop.
Who is Sainsbury’s Energy?
Sainsbury’s Energy is a ‘white label’ energy brand, which means it uses its well-known name and branding but the actual gas and electricity are supplied by another company.
Previously, this partnership was with British Gas, but since 2019, Sainsbury’s Energy has been powered by E.ON Next.
This means that while you sign up through Sainsbury’s Energy and get their unique Nectar point benefits, your energy supply, account management, and customer service are all handled by the E.ON Next team.
The primary appeal is for customers who are also Nectar card holders, as it is the only UK energy supplier to offer Nectar points.
What tariffs do Sainsbury’s Energy offer?
Sainsbury’s Energy focuses on simplicity, offering a small range of tariffs to suit different needs.
- Fixed Rate Tariffs: These are their flagship products. You can lock in your energy prices for either 12 or 24 months, protecting you from price rises. These tariffs typically come with the best Nectar point sign-up bonuses but also include early exit fees if you leave before the contract ends.
- Standard Variable Tariff (SVT): This is a flexible tariff with no exit fees. The price you pay per unit of energy can go up or down in line with Ofgem’s energy price cap.
- Tracker Tariff: This is a variable tariff that tracks the wholesale energy price. It offers a different way to pay for your energy, but it means your bills can change more frequently.
Sainsbury’s Energy does not currently offer specialist tariffs like Economy 7 or specific deals for electric vehicle owners.
How do Sainsbury’s Energy compare on price?
How Sainsbury’s Energy Compares on Price
The table below shows an estimate of what an average UK household might pay on Sainsbury’s Energy’s current tariffs.
Important: These figures are for illustration only. Your actual quote will be different based on your home’s location, your energy usage, and when you sign up.
| Tariff Name | Tariff Type | Tariff Length | Monthly Cost | Yearly Cost | Early Exit Fee |
| Sainsburys Fix and Reward Fixed 12m v57 | Fixed | 12 months | £135 | £1,622 | £100 |
| Sainsburys Fix and Reward Fixed 24M v36 | Fixed | 24 months | £146 | £1,747 | £200 |
| Sainsbury’s Standard Variable | Variable | Monthly | £146 | £1,749 | £0 |
| Sainsburys Track and Reward 12m v1 | Variable | 12 months | £146 | £1,749 | £0 |
Estimates are based on a typical UK household with medium annual consumption (2,700 kWh electricity and 11,500 kWh gas), paying by Direct Debit. Correct as of September 2025.
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What do other Sainsbury’s Energy reviews say?
Because E.ON Next provides the service, we look at reviews for both Sainsbury’s Energy and E.ON Next to get a full picture.
Trustpilot
On Trustpilot, Sainsbury’s Energy holds a ‘Great’ rating of 4.2 out of 5 stars from over 5,000 reviews (correct as of September 2025).
Happy customers frequently mention the easy switching process and the Nectar point rewards as major positives.
Negative reviews often focus on billing problems and difficulties with customer service, which are common complaints across the energy industry.
Which? Survey
In the latest Which? energy survey, Sainsbury’s Energy was ranked 9th out of 16 suppliers with a total score of 64%.
Crucially, it received a very high customer score of 72%, indicating that its existing customers rate their experience well.
Citizens Advice
Citizens Advice does not rate Sainsbury’s Energy directly.
Instead, it rates the underlying supplier, E.ON Next.
In the latest data, E.ON Next scored 3.1 out of 5 stars. This is a combination of scores for complaints handling, ease of contact, and billing accuracy.
How green is Sainsbury’s Energy’s energy?
Sainsbury’s Energy’s electricity is sourced from 86% renewable sources.
This is supplied by E.ON Next and is backed by Renewable Energy Guarantees of Origin (REGOs) certificates.
The latest available fuel mix for E.ON UK is:
| Fuel Source | % of Supply |
| Renewables | 86% |
| Fossil fuel | 12% |
| Nuclear | 2% |
| Other | 1% |
(Source: Citizens Advice / E.ON Next, correct as of September 2025)
What is Sainsbury’s Energy’s customer service like?
Customer service is handled entirely by E.ON Next’s UK-based team.
You can contact them via:
- Phone: 0808 501 5200
- Email: hi@eonnext.com
The call centre opening hours are Monday to Thursday 9am – 5pm, and Friday 9am – 4pm.
According to the latest Citizens Advice data for E.ON Next, the average call wait time is an excellent 1 minute and 41 seconds.
They also responded to 87.0% of customer emails within two days.
What is Sainsbury’s Energy’s website/app like?
Sainsbury’s Energy does not have its own mobile app.
All account management, including submitting meter readings, viewing bills, and tracking usage, is done through your online account on the Sainsbury’s Energy website, which is powered by E.ON Next.
Alternatively, customers can download and use the highly rated E.ON Next app.
This app allows you to do everything you would on the website and is well-regarded by users.
On the Google Play Store, it has a rating of 4.5 out of 5 stars from over 59,000 reviews.
On the Apple App Store, the E.ON Next app has a rating of 4.7 out of 5 stars from over 110,000 ratings.
What billing options are available?
The main payment method for Sainsbury’s Energy is a monthly Direct Debit.
However, the underlying supplier E.ON Next also accepts payments by cash or cheque and provides services for homes with prepayment meters.
You can make additional one-off payments by credit or debit card through your online account if you wish to pay off a debit balance.
Does Sainsbury’s Energy offer a recommend-a-friend referral scheme?
No, Sainsbury’s Energy does not currently have a ‘refer a friend’ scheme.
The main incentive for joining is the Nectar points offer.
Pros & Cons
Who is Sainsbury’s Energy good for?
- Regular Sainsbury’s shoppers: The ability to earn bonus Nectar points on energy and double points on shopping is the biggest draw.
- Customers who value quick phone support: The very low average call wait time is a major plus.
- People who want a green tariff: With 86% renewable electricity, its green credentials are strong.
- Those who want the backing of a major supplier: The service is delivered by E.ON Next, one of the UK’s largest energy companies.
Who might Sainsbury’s Energy not suit?
- Bargain hunters: While competitive, it’s rarely the absolute cheapest deal on the market.
- Customers needing specialist tariffs: If you have an electric vehicle or Economy 7 heating, you’ll find better-suited tariffs elsewhere.
- People who don’t use a Nectar card: Without the Nectar benefits, its main unique selling point is lost.
Competitor Comparison
Sainsbury’s Energy vs Octopus Energy
A key competitor is Octopus Energy, which topped the latest Which? survey.
- Rewards: Sainsbury’s Energy’s key reward is Nectar points. Octopus has a different approach, focusing on innovative smart tariffs like ‘Agile Octopus’ that can save EV owners and heavy off-peak users money. They also offer a £50 refer-a-friend bonus.
- Customer Service: Both suppliers are highly rated by their own customers. Octopus scored 78% in the Which? customer score, while Sainsbury’s Energy scored an impressive 72%. However, Octopus also has a higher overall score from the provider assessments.
- Green Credentials: Both offer high levels of renewable electricity. Octopus also invests heavily in building its own renewable generation, which some customers may prefer over the REGO certificate-backed approach.
Verdict: Choose Sainsbury’s Energy if you are a loyal Nectar user who values fast phone support. Choose Octopus if you want the highest-rated service overall or need cutting-edge smart tariffs.
Our Verdict
Sainsbury’s Energy is a solid choice for a specific type of customer: the dedicated Sainsbury’s shopper.
The proposition is compelling if you can make full use of the Nectar points, which can effectively reduce your annual energy cost.
Backed by the reliable infrastructure of E.ON Next, it boasts an exceptionally fast call-centre response time and a high customer satisfaction score of 72% from Which?.
However, if you don’t shop at Sainsbury’s or your priority is simply finding the lowest possible unit price, you will likely find cheaper deals elsewhere.
Frequently Asked Questions
Below are a few quick questions you may need answers to, along with our Sainsbury’s Energy review:
Is Sainsbury’s Energy the same as E.ON Next?
Not exactly. It’s a partnership. Sainsbury’s Energy is the brand, but E.ON Next supplies the energy and provides all the customer service.
How many Nectar points do you get with Sainsbury’s Energy?
You can get up to 8,000 Nectar points for joining a fixed tariff. Dual fuel customers also get double points on most shopping at Sainsbury’s.
Is Sainsbury’s Energy cheap?
They are competitively priced but not usually the cheapest on the market. Their value comes from the combination of price and Nectar rewards.
Can I get Sainsbury’s Energy with a prepayment meter?
Yes, their underlying supplier E.ON Next provides services for customers with prepayment meters.
Does Sainsbury’s Energy have an app?
No. You manage your account online or through the highly-rated E.ON Next app.
Is Sainsbury’s Energy’s electricity renewable?
Yes, 86% of its electricity comes from renewable sources.
Does Sainsbury’s Energy offer the Warm Home Discount?
Yes, as they are supplied by E.ON Next, they are part of the Warm Home Discount scheme. You can check your eligibility and apply through their website.
Are there exit fees with Sainsbury’s Energy?
Yes, their fixed-rate tariffs have an early exit fee, typically £100 or £200 per fuel if you leave before your contract ends. Their variable tariffs have no exit fees.
How to contact Sainsbury’s Energy
You can contact Sainsbury’s Energy in a number of ways. Below, as part of our Sainsbury’s Energy review, we’ve detailed all their means of contact:
Customer Email: info@sainsburysenergy.com
Telephone: 0808 163 5697
Office Hours: Thursday 9am – 5pm, and Friday 9am – 4pm. Closed on weekends and bank holidays.
Office Address: 5th Floor, 125 Colmore Row, Birmingham, B3 3SD
How do I switch to Sainsbury’s Energy?
The easiest way to switch to Sainsbury’s Energy is through a comparison website. This will allow you to check if Sainsbury’s Energy is one of the cheapest suppliers for you (tariffs vary based on your area) and will allow you to quickly and easily switch to them.
Our top rated supplier Octopus Energy is currently offering £50 credit to any new customer that uses our referral link. Click below to see why we rate them so highly and get your £50.
Managed to start a 2 year fix with Sainsbury’s energy a year ago and so should hopefully be sheltered from the horrendous price rises to come. This does, however leave me wondering the chances of Sainsbury’s Energy going bust (again!) and if they did, what would happen to my tariff i.e. would I keep the terms of my fix, or would I move onto the new price cap?
Switched at the start of September. Very straightforward, no issues with readings or payments. Website seems clear and simply. Love the no no-nonsense tariffs.
Have just signed up to Sainsbury Energy as of 30th September – my switch was on the way through just before the energy crisis hit. The firm behind Sainsbury Energy is Eon next. I am already regretting signing as it is apparent that eon are as usual messing things up. 1. Could not get my initial reads to go through so rang them in instead; 2. they have ignored this and sent me a very condescending email (to which I have forthrightly replied) detailing what estimate they are going to use. 3. As I went to a lot of time and trouble to get my reads through on the internet as requested which consequently failed because of their glitchy system and subsequent poor customer service I am more than a little annoyed. 4. So annoyed I will be looking to escalate the matter if it is not put right. 5. Obviously as soon as the energy crisis allow I will look to switch away. Beware of Sainsbury Energy / Eon Next. 12/10/2021