YES

As of 13 August 2026, AI can decide whether to fix your energy price.

Most people should hand this to a purpose-built tool.

Can you do it?

5 minutesto a draft.

30 minutesto something you’d act on.

Cost, all in£0

Skill neededchat-fluent

Who has to check ityou

What the alternative costsNo priced alternative for energy-price comparison is provided in the supplied tool data.

If this goes wrong, you can choose a tariff that costs more than expected or lock yourself into terms that no longer suit your household.

What to actually do

  1. Use a tool built for this

    The route this page recommends

  2. Do it yourself

    Second choice

    A chat interface, chat-fluent skill, and roughly 30 minutes until you can act on the result.

    How to actually do it

    1. Open your latest electricity and gas bill and copy the current unit rates, standing charges, billing period and actual or estimated usage.
    2. Open the supplier's current fixed-tariff offer and copy its unit rates, standing charges, contract length, exit fee and any stated conditions.
    3. Write down when your current tariff ends, whether it is variable or fixed, and whether you have a smart meter or unusual seasonal usage.
    4. Paste the bill figures, offer details and household preferences into the prompt, then ask the chatbot to show both the arithmetic and the assumptions.
    5. Compare every tariff figure in the response with the bill and the supplier's offer, correcting any transcription error before using the result.
    6. Ask the chatbot to rerun the comparison with lower and higher usage and without relying on an unverified prediction about future prices.
    7. Confirm the final rates, standing charges, exit fee and contract terms directly with the supplier before switching, and keep the supplier's written offer.

    Prompt

    Help me decide whether to fix my UK household energy price. This is not professional advice. Use only the tariff and usage information I paste below, do not invent current prices or predict the market as a fact, and say when the information is insufficient. Compare staying on the current variable tariff with the fixed tariff using the same expected usage. Show the calculation for unit charges, standing charges, any exit fee and the total under each scenario. Include a break-even explanation and a plain list of what could make the comparison wrong. Separate facts from assumptions. Do not tell me to switch based only on a forecast. End with the specific figures and contract terms I should confirm with my supplier before deciding. If the decision is connected to serious financial difficulty, tell me to speak to a debt adviser or energy adviser.

Current tariff and bill:
[PASTE YOUR LATEST BILL OR THE RELEVANT FIGURES]

Fixed tariff offer:
[PASTE THE SUPPLIER'S CURRENT OFFER, INCLUDING UNIT RATES, STANDING CHARGES, CONTRACT LENGTH AND EXIT FEE]

Usage:
[PASTE ANNUAL OR RECENT ELECTRICITY AND GAS USAGE, WITH UNITS]

Household preferences:
[STATE HOW IMPORTANT PRICE CERTAINTY, FLEXIBILITY AND AVOIDING AN EXIT FEE ARE TO YOU]

    Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.

  3. Hand it to a person

    The distant third

    A person who owns the outcome does this end to end, worth it when the failure is dear.

What it gets wrong

Even on a YES, the friction has a name: real time truth, stakes of error and judgement under ambiguity.

How we scored this

Five axes, each scored nought to two by hand: ten means AI carries the task cleanly, and the thresholds that turn a total into YES, PARTLY or NO are published in the methodology. Each axis name links to its definition.

AxisScore (0–2)
Output2
Inputs2
Verification1
Liability1
Effort delta2
Total8 / 10

The methodology and its thresholds are published in full.

FAQ

Can AI tell me whether I should fix my energy tariff?
Yes, it can compare a fixed tariff with your current variable tariff if you provide accurate usage and contract figures. It cannot reliably predict future prices, so treat its conclusion as a structured comparison rather than a forecast.
What do I need to give AI to compare energy tariffs?
Give it your recent usage, electricity and gas unit rates, standing charges, current contract details, the fixed offer, contract length and any exit fee. Include whether price certainty or flexibility matters more to you.
Is it safe to use AI to choose an energy tariff?
It is suitable for checking arithmetic and laying out trade-offs, provided you verify every tariff term with the supplier. This is not professional advice, and you carry the cost if the information is incomplete or the decision is wrong.
Should I fix my energy price if prices might rise?
A possible rise alone is not enough to decide, because a fixed tariff can include a higher starting price or an exit fee. Compare the supplier's actual terms with your own usage and decide how much price certainty is worth to you.

Nearby answers

All Energy & bills rulings

Assessed by gpt-5.6-luna (gpt-5.6-luna) on 2026-08-13, second-checked by an independent model. Wrong somewhere? Email [email protected] and it gets re-checked.

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