25th May 2026
A lot of people ask exactly that question, and on the surface it seems logical. If one company is cheapest, why not simply have the government publish the answer and let everyone switch automatically?.
The problem is that the UK energy market is deliberately designed around “competition” rather than a single state-directed tariff system. Governments since the 1980s — both Conservative and Labour — have believed competition between suppliers would supposedly keep prices lower and encourage innovation.
In reality, many consumers now feel the system has become overly complicated.
There are several reasons why the government does not simply announce one cheapest supplier:
1. There is no single cheapest company for everyone
Different suppliers may be cheapest depending on:
region of the UK
payment method
smart meter availability
fixed vs variable tariff
standing charges
time-of-use tariffs
electric-only vs dual fuel
low usage vs high usage households
One company might be cheapest for a pensioner using little energy, while another is cheaper for a large family or electric vehicle owner.
2. Prices change constantly
Wholesale gas and electricity prices move daily.
Suppliers launch and withdraw tariffs continuously. Some cheap deals may only last days before closing to new customers.
That makes it difficult for government to maintain a single constantly updated “best supplier” list without effectively becoming a national switching service.
3. Governments fear being blamed if a “cheap” supplier collapses
This already happened during the 2021–22 energy crisis when dozens of small “cheap” suppliers failed after offering unsustainably low prices.
Millions of customers had to be moved elsewhere, and the cost was effectively added onto everybody’s bills through levies.
If government officially recommended one supplier and it collapsed, ministers would face major criticism.
4. The system is built to preserve private competition
The UK energy market is structured so government regulates the market through Ofgem rather than directly choosing winners.
Ofgem instead uses the “energy price cap” system, which:
limits maximum standard tariffs
still allows suppliers to compete underneath that cap
aims to stop the worst overcharging
Critics argue this still leaves consumers forced to navigate a confusing market themselves.
5. Standing charges distort “cheapest” calculations
A major complaint today is that even households using little energy still face high daily standing charges.
This means:
low users often gain little from switching
suppliers can appear “cheap” on unit prices while recovering money elsewhere
comparing tariffs becomes difficult for ordinary households
6. Political ideology
There is also an ideological issue.
Many politicians — especially free-market supporters — believe government should not:
direct consumers to specific companies
interfere too heavily in markets
operate effectively as a national purchasing adviser
Critics say this ideology has gone too far and created a system where ordinary bill payers must spend hours researching tariffs to avoid overpaying.
Some European countries operate more centralised systems, while France still has much larger state involvement through EDF.
In the UK there have been repeated calls for:
automatic cheapest tariff switching
mandatory “best price” rules
a social tariff for vulnerable households
a publicly owned energy supplier
regional or national energy pricing reforms
Even Citizens Advice has argued many consumers are effectively “trapped” on poor-value tariffs because the market is too complex.
So in short, the government could theoretically create a system that automatically moved people onto the cheapest suitable tariff — banks already do similar things with savings rates in some countries — but the UK energy market was designed politically around consumer choice and competition rather than simplicity.