Smart Tariffs: All You Need to Know
If you can shift your energy use to a different time of day, you could save money on your electricity bills and help the UK reach net zero. Smart time of use tariffs reward you for using electricity when demand — and carbon intensity — is lowest. This guide explains how they work, the different types available, and which tariffs are leading the way in 2026.
1. Understanding Time of Use Tariffs
Our electricity grid is powered by a mix of sources — wind, gas, nuclear, and solar. When demand is high (mornings and evenings), more gas is burned to keep up, making electricity higher carbon and more expensive to produce.
A time of use (TOU) tariff reflects this by charging different rates depending on when you use electricity:
| Period | When | Price |
|---|---|---|
| Peak | Weekday evenings (typically 4–7pm) | Higher than standard rate |
| Off-peak | Late night / early morning (typically 11pm–5am) | Significantly lower rate |
| Shoulder | Between peak and off-peak | Intermediate pricing |
What you need to get started— To sign up to a time of use tariff, you'll need a smart meter. A smart meter sends readings automatically to your supplier every 30 minutes, enabling accurate billing across different rate periods. If you don't have one, your supplier will install one free of charge.
2. Static vs. Dynamic Tariffs
Not all time of use tariffs work the same way. Understanding the difference is key to choosing the right one.
Static Time of Use Tariffs
Prices are fixed in advance with set time blocks. They may vary seasonally, but the rate for each period is predictable. Examples include tariffs with:
- Different weekend and weekday pricing
- Set overnight hours for EV charging at a low fixed rate
- Seasonal rate adjustments announced in advance
Dynamic Time of Use Tariffs
Prices change from day to day based on wholesale electricity markets. Rates are set close to real-time and can vary significantly — including negative pricing, where you're actually paid to use electricity during periods of oversupply.
Dynamic tariffs require flexibility.Dynamic tariffs offer the biggest potential savings, but only if you can genuinely shift your usage. If you can't avoid peak times, a dynamic tariff could end up costing you more than a standard deal.
3. Who Benefits Most?
Smart tariffs aren't for everyone. You'll benefit most if you have the ability to shift when you use electricity. The biggest winners tend to be households with:
- An electric vehicle — charge overnight at off-peak rates instead of paying daytime prices
- A home battery — store cheap off-peak electricity and use it during peak hours
- Solar panels — export surplus generation during peak periods for higher rates
- A heat pump — run during dedicated low-rate windows
- Flexible routines — able to run dishwashers, washing machines, etc. outside peak times
Storage heaters and hot water cylinders— If you have storage heaters, check whether a smart tariff beats your current Economy 7 deal. Have a hot water cylinder? It's worth considering whether you can save by heating it during off-peak windows.
4. Top Smart EV Tariffs (2026)
If you drive an electric vehicle, these tariffs offer the best overnight charging rates in the UK right now:
| Tariff | Off-Peak Rate | Key Details |
|---|---|---|
| Intelligent Octopus Go | ~7–8p/kWh | 6 hours overnight (11:30pm–5:30am). Best "set and forget" option. |
| OVO Charge Anytime | ~7p/kWh | Credit-based, app-managed. Charges at ~7p any time of day. |
| E.ON Next Drive | ~7p/kWh | Longer overnight window (6–7 hours) at a consistently low rate. |
| British Gas Electric Driver | 7.9p/kWh | Off-peak midnight–5am. Competitive and from a well-known brand. |
5. Top Smart Solar & Battery Tariffs (2026)
If you have solar panels and a battery, these tariffs maximise the value of your generation and storage:
| Tariff | Key Rate | Key Details |
|---|---|---|
| Intelligent Octopus Flux | ~32p+ export / ~5p import | Automatically managed. Cheap overnight import, high peak export rates. |
| Good Energy Solar Savings | 25p flat export | One of the highest flat export rates available. Great for solar + battery. |
| EDF Sunshine Tariff | Varies | Offers "free" electricity during specific sunny periods for solar owners. |
| Cosy Octopus | 3 low-price windows daily | Designed for solar + heat pump homes. Three cheap windows each day. |
6. Top Smart Heat Pump Tariffs (2026)
Heat pumps pair well with smart tariffs, especially those offering dedicated low-rate windows:
| Tariff | Key Rate | Key Details |
|---|---|---|
| Cosy Octopus | 51% below standard rate | Three daily slots: 4–7am, 1–4pm, 10pm–12am. |
| ScottishPower Heat Pump Saver | 14p/kWh | Dedicated heat pump rate between 11am and 4pm. |
| EDF Heat Pump Tracker | 10p below standard | Off-peak windows at 4–7am and 1–4pm. |
7. What to Check Before Switching
Before committing to a smart tariff, make sure you've considered the following:
- Smart meter — Do you have one? If not, ask your supplier about installation.
- Tariff eligibility — Some tariffs require specific equipment (EV charger, solar panels, etc.).
- Peak and off-peak rates — Are they fixed or variable? Do they change seasonally?
- Contract terms — Check for early termination fees, contract duration, and switching penalties.
- Billing and payment — How often will you be billed? Are there discounts for direct debit?
- Usage monitoring — Does the supplier offer an app or dashboard to track your consumption in real time?
- Device compatibility — Can your smart home devices or appliances connect to the smart meter for automated scheduling?
- Flexibility— Can you switch tariffs easily if it doesn't work out?
Ask in the community for real-world experiences with specific tariffs — members regularly share their actual savings figures, which can be far more useful than supplier estimates.
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