How energy customers actually choose and switch suppliers

# How energy customers actually choose and switch suppliers

A household in Leeds opens a bill £30 higher than last month's. Ten minutes later someone is on uSwitch: postcode, a guess at annual consumption, a ranked list of tariffs. Halfway down the page comes the question "how much do we actually use?", the answer is a shrug, the tab stays open all afternoon, and by evening it is closed. Nothing changes. That aborted session, repeated millions of times a year, is the central fact of retail energy marketing.

Switching electricity or gas supplier in the UK, Germany or Japan takes minutes and usually saves money. Most households never do it. In mature liberalised markets annual switching rates sit in the low double digits or lower, so the large majority stay where they are year after year, often on the most expensive tariff their supplier sells. How that decision gets reached, and where it dies, is the subject of this lesson.

Why the "rational shopper" model breaks

Classic marketing assumes a buyer compares options and picks the best value. Energy breaks that in four places.

The product is invisible and identical. The electricity arriving at the meter is physically the same whoever sends the bill. What varies is price, contract length, billing quality and the call centre. That makes energy a low-involvement purchase: a category the buyer thinks about rarely and reluctantly, where the perceived difference between options is small.

Engagement is close to zero. Most people deal with their supplier when a bill lands or something breaks. The comparison with insurance is fair. It is bought under mild duress and forgotten immediately.

Switching feels riskier than it is. The wires, pipes and meter do not change; only the company that bills you does, and supply is not interrupted while a transfer runs. Customers still fear a lapse, a botched transfer or a hidden catch, and perceived risk is what governs behaviour.

Almost nobody knows their own consumption. A tariff comparison is arithmetic on a number, annual kWh, that most households cannot state within a factor of two. Uncertain inputs produce uncertain outputs, and uncertainty freezes decisions.

The economics of inertia

Many suppliers earn their best margins from customers who are not paying attention.

When a fixed-term contract ends, the customer is normally rolled onto a default tariff (in Britain, the standard variable tariff or SVT): the rate that applies when you have chosen nothing. It is usually more expensive than the deals dangled at new sign-ups, so existing customers subsidise discounts for switchers. Regulators call that the loyalty penalty.

Germany runs the same logic under another name. A household that has never made a choice is served by its local Grundversorger, the designated basic supplier, at a basic-supply tariff sitting well above the top of the Check24 ranking. Roughly a quarter of German household electricity customers are still there, decades after liberalisation.

Ofgem, the British energy regulator, capped default tariffs from January 2019 and has reset the level at regular intervals since. That single intervention rewrote every marketer's plan, because it capped the upside of inertia and pushed competition towards service, cost to serve and retention.

The rule to carry away: your acquisition and retention economics are set by regulation as much as by rivals. Know the rules of your market cold.

SegmentingSegmentingDividing a market into distinct groups of customers who share similar needs, characteristics or behaviours, so each group can be served with a tailored approach.View full definition → by engagement, not demographics

In energy retail the useful segmentationsegmentationDividing a market into distinct groups of customers who share similar needs, characteristics or behaviours, so each group can be served with a tailored approach.View full definition → axis is not age or income. It is engagement.

• Active switchers. Price-led, live on comparison sites, churn on schedule. Cheap to reachreachThe number of unique people exposed to your message in a given period. Unlike impressions, reach counts each person once, no matter how often they see it.View full definition →, expensive to keep.
• Passive loyalists. Never switch, tolerate default tariffs, high lifetime valuelifetime valueLifetime Value: the total revenue (or profit) a customer generates throughout their entire relationship with your business.View full definition → and exposed to regulatory and reputational shocks.
• Reluctant considerers. Triggered by a bill shock or a house move, stalled at the friction stage.

Budget is wasted when all three get the same message. The active switcher needs a headline number. The reluctant considerer needs the friction taken out. The passive loyalist needs a reason to feel fine about staying, and never a prompt to go looking.

The moving-home trigger

The largest natural switching moment is moving house. The household has to arrange supply anyway, so the "do nothing" option disappears. Acquisition spend concentrates here for that reason: partnerships with estate agents, removal firms and property platforms reachreachThe number of unique people exposed to your message in a given period. Unlike impressions, reach counts each person once, no matter how often they see it.View full definition → people already in an active decision state.

Inside the comparison site

Price comparison websites (PCWs), which rank tariffs side by side for a given postcode and consumption, are the main shopping channel in most liberalised European markets. uSwitch in Britain and Check24 in Germany both take a commission from the supplier on each switch they generate, which shapes what the page shows and how it is ordered.

They lowered friction without removing it. Three blockages survive:

1. Cognitive load. A tariff bundles a unit rate, a standing charge (a fixed daily fee whatever you use), exit fees and a contract term. Comparing four of those honestly is real work, so people abandon.

2. Doubt about the ranking. If the site is paid per switch, customers suspect the top result is the best-paying one, not the cheapest. Ofgem's Confidence Code accreditation exists to answer that doubt, requiring accredited sites to let customers see the whole market rather than only commission-paying deals.

3. Estimate anxiety. Savings depend on consumption the household cannot supply, so the result carries a silent asterisk.

The ranking logic also manufactures behaviour. German comparison tables have long been sorted by first-year cost including the new-customer bonus (Neukundenbonus), a one-off payment that flatters year one and disappears in year two. That produces a population of serial switchers who re-run Check24 every twelve months, and it means a supplier competing there is buying a customer who is contractually trained to leave.

For marketers, the consequence is blunt: the contest is decided on someone else's page, in someone else's format. Your standing charge and unit rate have to read well in the exact columns the PCW displaysdisplaysThe total number of times an ad or piece of content is displayed, regardless of clicks. Each display counts as one impression, even to the same person.View full definition →. A confusing tariff loses even when it is cheaper.

🎬 [VIDEO: "How does energy switching work?" - youtube.com - a short consumer-facing explainer on how supplier switching happens behind the scenes]

When the comparison channel goes quiet

Through 2021 and 2022, wholesale gas prices rose so far that British suppliers stopped offering fixed deals below the capped default rate. Dozens of suppliers failed. Comparison sites, uSwitch included, had nothing worth recommending, and household switching collapsed to a trickle. Any supplier whose only relationship with prospects was a PCW listing simply had no acquisition channel for the better part of two years.

Japan: switching without a comparison habit

Japan opened household electricity retail in April 2016 and gas in April 2017. Tokyo Gas, the incumbent gas utility for the capital region, became one of the largest sellers of electricity to households, mainly by offering a set discount to people already receiving its gas bill. The decision arrived through a billing relationship the household already trusted, not through a ranked table it had to interpret. Years after liberalisation, most Japanese households were still with their regional incumbent electricity utility.

That contrast is the point. Where comparison intermediaries are strong, the switch is a price event on a third-party page. Where they are weak, it travels along existing relationships and bundles, and the winner is whoever already has permission to talk to the household.

What actually moves a household to act

Given inertia, low engagement and comparison friction, four things reliably help.

Attack the perceived risk of the transfer, not only the price: "we handle the switch", "no exit fee", "supply is never interrupted". In a category where fear outweighs arithmetic, credible reassurance often beats a slightly lower rate.

Replace the estimate with a real number. Smart meter data lets a supplier quote savings against actual consumption instead of a household guess, which removes the silent asterisk. Handle it transparently: consumption data is sensitive and revealing.

Be present at the trigger moments, since these are the only windows when the default disappears: moving home, contract end, a bill shock, buying an EV.

Be legible where the choice is made. That means the PCW columns in Britain and Germany, and the incumbent's own bill in a market like Japan.

Retention: the quiet half of the strategy

Acquisition in energy is costly and switching is rare, so the economics are won at renewal.

The dangerous moment is contract end. A customer rolling off a fixed deal onto a higher default is exactly the person who will feel a bill shock and finally act. Retention marketing concentrates on the renewal window: proactive contact before the end date, a clear next-best deal, and re-fixing in two clicks.

The tension is real. Rolling customers onto expensive defaults pays well this quarter and generates churn, complaints and regulatory attention later. Treating renewal as a service moment rather than a trap is the version that survives.

Winback deserves attention too. Someone who left over one bad experience will often come back once the grievance and the friction are dealt with, because low-involvement customers are not emotionally attached to their new supplier either.

Putting it together: a friction-first mindset

The through line here is friction management rather than persuasion. You are rarely arguing that your electrons are better. You are lowering the effort and the fear of acting at the moment someone is open to acting, while giving disengaged customers no reason to start shopping.

MapMapUsing software to automate repetitive marketing tasks and campaigns, enabling personalisation at scale across channels like email, web, and social.View full definition → every campaign to one question: does this remove friction for a customer who is ready, or does it protect a customer who is content?

Key takeaways

• Inertia is the market. Most households never switch even when it is easy and cheaper, so default behaviour and default tariffs drive retail economics more than headline pricing does.
• Segment by engagement, not demographics. Active switchers need price, reluctant considerers need friction removed, passive loyalists need reassurance and never a prompt to shop.
• The comparison page is the battlefield, and it belongs to someone else. Legible standing charges and unit rates win there; ranking rules, like Germany's first-year bonus sorting, shape who you end up buying.
• Channel concentration is a risk. UK switching went quiet for close to two years when fixed deals vanished below the cap, stranding suppliers who only existed on PCWs.
• Where intermediaries are weak, relationships carry the switch. Tokyo Gas sold electricity to households that already had its gas bill, which is a different acquisition model from a ranked table.