Find Your Best Energy Tariff
Upload your smart meter data and compare across all major UK electricity tariffs — including Standard, Economy 7, Time of Use and Dynamic pricing. Especially useful for heat pump and EV households with higher consumption.
How It Works
1. Register
Create a free account and set your DNO region to see tariffs in your area.
2. Upload Data
Export your half-hourly smart meter readings as CSV and upload them.
3. Compare
We calculate your exact cost on every tariff using your real consumption data.
4. Save
Switch to the best deal. We'll show you referral bonuses too.
All Tariff Types Supported
A fixed unit rate and standing charge. Simple, predictable billing.
Separate day and night rates with a customisable night window.
Multiple rate bands throughout the day — peak, off-peak and more.
Half-hourly rates that change with the grid, like Octopus Agile. Can go negative.
Tariffs We Compare
We track live rates across 5 suppliers and 12 tariffs across all 14 UK DNO regions.
EDF
3 tariffs tracked across all UK regions
- FreePhase Dynamic
- FreePhase Fixed
- Heat Pump Tracker
Good Energy
1 tariff tracked across all UK regions
- Good Energy Heat Pump
Octopus
6 tariffs tracked across all UK regions
- Agile Octopus November 2022 v1
- Cosy Octopus
- COSY-FIX-12M-25-09-24
- COSY-FIX-6M-26-03-05
- Flexible Octopus
- Snug Octopus
Price Cap
1 tariff tracked across all UK regions
- Price Cap
ScottishPower
1 tariff tracked across all UK regions
- Heat Pump Saver Apr 2027 v1
Rates are fetched automatically from supplier APIs and updated daily. All 14 UK DNO regions covered: Eastern England, East Midlands, London, North West, Northern England, Southern England, South Wales, South East, South West, West Midlands, Merseyside & North Wales, South Scotland, and North Scotland.
Especially Useful for Heat Pump & EV Households
Heat pumps and electric vehicles can add 5,000–15,000 kWh per year to your electricity bill — far above the typical UK household average of around 3,500 kWh. At that consumption level, even a small difference in unit rate makes a very significant difference to your annual bill.
Many households with heat pumps benefit from smart tariffs like Octopus Agile (dynamic half-hourly pricing) or Time of Use tariffs, where cheap overnight rates can be exploited by scheduling your heat pump or EV charging to run during off-peak periods. But whether that's actually true for your home depends on your specific usage pattern — which is exactly what this tool analyses.
Upload your smart meter data and we'll calculate your exact cost on every available tariff based on when you actually use electricity — not a generic estimate.
Why tariff choice matters more at higher consumption
| Household type | Typical annual kWh |
|---|---|
| Average UK household | ~3,500 kWh |
| EV owner (avg mileage) | ~5,500–6,500 kWh |
| Heat pump (3-bed home) | ~8,000–12,000 kWh |
| Heat pump + EV | ~13,000–18,000 kWh |
A 1p/kWh saving on a 15,000 kWh household is worth £150/year. The right tariff choice can save considerably more.