Tools
Octopus tools for checking the numbers before you switch
Use these tools as a starting point, not a quote. Octopus prices and eligibility can vary by postcode, meter setup, car or charger compatibility and the tariff version available when you check.
Reviewed May 2026. The live-rate tools still need your postcode before you rely on the result.
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Bill calculator
Use annual kWh and live postcode rates to estimate Octopus electricity and gas costs before you compare tariffs.
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EV charging calculator
Compare home-charging and petrol-style assumptions so you can see whether Go or Intelligent Go is worth a closer look.
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Tariff shortlist quiz
Answer a few questions about EVs, solar, batteries, heat pumps and routine use to narrow the tariffs worth checking.
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Live tariff comparison
Enter a postcode to compare current Octopus unit rates and standing charges for your region.
How to use the tools sensibly
- Start with your situation. EV, solar, battery and heat-pump households can get very different answers from a flat or gas-heated home.
- Check live rates before acting. Static examples age quickly, so use the postcode comparison or the relevant Octopus tariff page before switching.
- Sense-check eligibility. Smart tariffs often depend on smart-meter data, compatible cars, chargers or heating setup.
Ready to switch?
If the numbers still point towards Octopus, the referral-code page explains how Matt's link works and what to check before you use it.
Check the referral code page