ScottishPower is one of the UK's largest energy suppliers, with more than 5 million home and business customers. Based in Glasgow, it has been owned by Spanish energy company Iberdrola since 2006.
In 2018, ScottishPower became the first of the UK's big energy companies to generate all of its electricity from wind, after selling its gas power stations and closing its coal plants. It now focuses on wind power and electricity networks, and uses its green credentials to stand out from other large suppliers.
ScottishPower has strong green credentials and a 4.4 Trustpilot score, but it came bottom in the latest Which? survey. It also has one of the higher complaint rates with Citizens Advice, so it's worth comparing prices and service before you switch.
| Company detail | ScottishPower |
|---|---|
| Founded | 1990, privatised in 1991 |
| Owner | Iberdrola, since 2006 |
| Head office | Glasgow |
| Customers | More than 5 million, around 8% of UK electricity and 7% of gas customers (March 2026) |
| Generation | 100% wind, including Whitelee, the UK's largest onshore wind farm |
| Tariffs offered | Variable, fixed, tracker, EV, heat pump and solar |
| Exit fees | None on many tariffs, £50 per fuel where they apply |
| Trustpilot rating | 4.4 out of 5 from around 193,000 reviews |
| Which? score | 56%, bottom of the overall rankings |
| Citizens Advice rating | 2.76 out of 5, ranked 12th (April to June 2026) |
| Phone | 0345 270 0700 |
Jump to a section:Contact detailsTariffsReviewsWho owns ScottishPower?Fuel mixHow to switchFAQs
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Below are the contact details for ScottishPower, should you need to get in touch about billing or a complaint.
| Contact method | Details |
|---|---|
| Phone | 0345 270 0700 9am to 5pm, Monday to Friday, for pay monthly customers Prepayment customers have longer hours, until 8pm on weekdays and 9am to 4pm on Saturdays |
| Smart meter bookings | 0800 074 0072 9am to 5pm, Monday to Friday |
| contactus@scottishpower.com | |
| Post | ScottishPower Customer Services 320 St Vincent Street Glasgow G2 5AD |
| Website | ScottishPower contact page, including web chat |
ScottishPower has a relatively small range of tariffs. The live list of current tariffs is shown below.
| Tariff Name | Electricity Unit Price | Electricity Standing Charge | Gas Unit Price | Gas Standing Charge |
|---|
For comparison purposes, energy prices shown above are based on average usage figures only. Prices may vary depending on the region you live in and your own gas and electricity usage. To see the best energy deals for where you are, run a gas and electric comparison today.
| Tariff type | What it offers |
|---|---|
| Standard variable | Prices move with the Ofgem price cap, with no end date and no exit fees. |
| Fixed | ScottishPower usually has two fixed deals, locking your unit rates for the length of the tariff. Some carry exit fees of £50 per fuel. |
| Tracker | A tariff that tracks the Ofgem price cap. |
| EV Saver and EV Optimise | Tariffs for electric vehicle owners. EV Saver offers cheaper overnight electricity, while EV Optimise is an add-on for EV charging, available to existing customers. See our EV tariffs guide. |
| Heat pump and solar | Specialist tariffs for homes with a heat pump or solar panels. Some may be limited to existing customers. |
Tariff details correct as of July 2026. ScottishPower also offers an app to help you manage your energy use on the go.
ScottishPower scores 4.4 out of 5 on Trustpilot from around 193,000 reviews. Independent surveys are much less positive, though.
ScottishPower came bottom of the overall Which? rankings in its survey from September and October 2025, scoring 56%. It received two stars out of five in every customer category, including customer service, value for money and ease of contacting, and scored just 4 out of 15 for complaint handling.
ScottishPower also didn't take part in the Which? sustainability questionnaire, so it wasn't considered for Eco Provider status.
Citizens Advice gave ScottishPower a customer service rating of 2.76 out of 5 for April to June 2026, placing it 12th among suppliers. It had one of the highest complaint rates, at 76.4 per 10,000 customers, although it answered calls quickly and replied to almost 97% of emails within two days.
| Citizens Advice measure | Score |
|---|---|
| Customer commitments | 5 out of 5 |
| Contact waiting time | 4 out of 5 |
| Billing and metering | 2.8 out of 5 |
| Fewer complaints | 1 out of 5 |
ScottishPower is owned by Iberdrola, the Bilbao-based energy group, which bought it in 2006 in an £11.6 billion deal. Iberdrola is one of the world's biggest renewable energy companies and a major investor in wind power, which explains ScottishPower's green focus.
ScottishPower was set up in 1990, ahead of the privatisation of Scotland's electricity industry in 1991. In 1995 it bought MANWEB, the regional electricity company for Merseyside and North Wales.
As well as supplying energy, it runs SP Energy Networks, which operates the electricity networks in Central and Southern Scotland, Merseyside, North Wales and parts of Cheshire and Shropshire. Keith Anderson is its chief executive.
Any electricity we use is generated from a combination of different fuels such as nuclear, gas, coal and renewable sources (wind, water and the sun). The different amounts of each fuel make up a supplier's fuel mix.
ScottishPower generates all of its own electricity from wind, but it also buys electricity from other generators. Here is its total fuel mix:
| Supplier | Coal | Gas | Nuclear | Renewable | Other | CO2 (g/kWh) | Nuclear Waste (g/kWh) |
|---|
This is ScottishPower's total fuel mix, which includes electricity supplied on non-green tariffs. The electricity supplied on its green tariffs comes from 100% renewable sources.
ScottishPower is worth considering if green credentials matter to you, as it generates all of its own electricity from UK wind farms, and it has the reassurance of being one of the UK's largest suppliers.
On the other hand, its Which? and Citizens Advice results are among the weakest in the market, and it has a relatively short tariff range. As always, compare prices using your own postcode and usage before switching.
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ScottishPower is owned by Iberdrola, a Spanish energy company based in Bilbao, which bought it in 2006.
ScottishPower generates all of its own electricity from wind, and its green tariffs are supplied with 100% renewable electricity. Its total fuel mix also includes electricity bought from other generators for its non-green tariffs.
Many ScottishPower tariffs have no exit fees. Where they apply, they are usually £50 per fuel, although you can switch penalty-free in the final 49 days of any fixed deal.
Yes. EV Saver offers cheaper overnight electricity for charging, and EV Optimise is an EV charging add-on for existing customers. See our EV tariffs guide to compare them with other suppliers.
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Last updated: 29 September 2026. Which? figures are from its September to November 2025 assessment. Citizens Advice figures cover April to June 2026. Trustpilot rating and tariff details correct as of July 2026. Tariff availability and pricing change frequently, so always confirm current rates through a comparison using your own postcode and consumption.
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