Octopus Agile vs Other Tariffs - The 2026 Comparison Guide

The landscape: all current UK smart tariffs at a glance

The UK electricity tariff market has transformed over the past three years. Where once there were only standard variable tariffs and a handful of fixed deals, there are now multiple intelligent tariffs designed for specific household types. The table below provides a quick-reference overview before we go deeper on each comparison.

Each of these tariffs makes a different trade-off between potential savings and required engagement. The right choice depends on your lifestyle, your appliances, and how much mental bandwidth you are willing to invest in optimising your energy use. This guide works through each comparison in detail.

Agile vs Intelligent Octopus Go: the most important comparison

This is the comparison most households should make first, because Intelligent Octopus Go is the most direct alternative to Agile for modern UK households - particularly those with an electric vehicle.

Octopus Agile offers fully dynamic pricing: every half-hour of every day carries a different price, published the evening before. Prices can range from negative to over 100p/kWh during extreme demand events. The reward for managing against this price signal is potentially very large - engaged households regularly save £400-600 per year compared to the price cap.

Intelligent Octopus Go offers a fixed cheap window from 00:30 to 04:30 at a set overnight rate, currently around 7p/kWh in most regions. Outside that window, a standard rate applies. The "Intelligent" element means that if you have a compatible smart EV charger - Ohme, Indra, Hypervolt, and others are supported - the tariff automatically schedules your vehicle charging during the cheap window without you lifting a finger.

The key question is which approach delivers better outcomes for your household specifically.

For an EV owner whose primary goal is cheap overnight charging, Intelligent Go is simpler and very effective. The 7p overnight rate is excellent compared to the 26.11p price cap, and the automation means you never need to think about it. You plug in, the car charges cheaply, done.

For the same EV owner who is also running a dishwasher, washing machine, and immersion heater, Agile's half-hourly transparency is more powerful. You can schedule all those loads to coincide with the cheapest slots - which on many nights are cheaper than Intelligent Go's 7p floor. You capture more of the overnight surplus generation. But you are checking a dashboard, not just plugging in a car.

The verdict: if you have an EV and do not want to engage with energy prices, choose Intelligent Go. If you want maximum savings and are willing to glance at AgileAlert each evening, Agile almost always wins on total annual saving.

Agile vs Economy 7: the 3-4 million household question

Economy 7 was the original "smart" electricity tariff, introduced decades ago to encourage overnight consumption of surplus nuclear baseload. Around 3-4 million UK homes still use it, many without having considered whether it is still the best option available to them.

Economy 7 provides a seven-hour overnight cheap window - typically midnight to 7am, though the exact hours vary by supplier and region. The cheap rate is typically 10-14p/kWh. The day rate is typically 28-35p/kWh. These numbers matter because the day rate is significantly higher than the Agile typical day rate, which tracks the wholesale market and averages 18-22p during peak hours.

For households on Economy 7, the comparison to Agile is almost always favourable towards Agile - provided they can access a smart meter. Agile's overnight rates routinely come in at 2-8p/kWh, far below Economy 7's 10-14p floor. And Agile's day rate, while variable, averages below the 28-35p that Economy 7 customers pay for every unit used outside the cheap window.

The saving for a household switching from Economy 7 to Agile is typically significant. A household using 3,500 kWh per year with 40% overnight consumption would save roughly £80-120 per year on unit rates alone - on top of any additional savings from optimising their usage against the half-hourly price chart.

The barrier is the smart meter requirement. Economy 7 works on older meter technology. Switching to Agile requires a smart meter installation, which Octopus arranges for free. The installation takes a few hours and there is no charge. For Economy 7 households, this is a very worthwhile investment of an afternoon.

Agile vs Octopus Flux: for solar and battery owners

Octopus Flux is designed specifically for households with both solar panels and battery storage. It creates a symmetric price structure: import electricity cheaply overnight (typically in a 3-hour window around 2am-5am), export electricity at a good rate during the afternoon peak when demand is highest.

For households with substantial solar export - say a 6kW array generating surplus most summer days - Flux's export rate can be very attractive. During peak afternoon hours, Flux offers an export tariff that rewards sending power back to the grid when it is most valuable. This can generate meaningful export income that partially offsets import costs.

Agile, by contrast, offers a very cheap import rate across a wider window of low-price slots, but the export rate under Agile (or under the standard Octopus export tariff that Agile customers typically use) is lower than Flux's peak export rate.

The decision comes down to your household's balance of import versus export. High-export households - those with larger arrays and smaller home consumption, who send more back to the grid than they import - benefit more from Flux's export premium. High-import households - those with larger homes, EVs, or battery systems that primarily save money on cheap overnight imports - benefit more from Agile's lower import rates and wider range of cheap periods.

A rough guide: if your annual solar export exceeds 2,000 kWh and your import is relatively modest, model Flux carefully. If your import is high - 3,000+ kWh including EV charging and shifted loads - Agile is likely to win overall even with the lower export rate.

Agile vs Octopus Cosy: who benefits from simplicity

Octopus Cosy takes a different approach from all the above tariffs. Rather than a single overnight cheap window, it provides six cheap hours spread across the day in three slots: early morning (04:00-07:00), early afternoon (13:00-16:00), and late evening (22:00-00:00). The cheap rate during these windows is set and predictable. Outside them, a standard rate applies.

Cosy was designed with heat pump households in mind. Heat pumps run best when they run for extended periods at lower intensity - exactly the kind of usage that benefits from having three separate cheap windows rather than one. If your heat pump heats the house in the morning cheap window, the house stays warm through the afternoon, and the evening cheap window tops it up before bed, you never need to run the heat pump during expensive peak hours.

For non-heat-pump households, Cosy is still a valid option if you genuinely do not want to engage with price checking. The fixed windows are predictable. You know exactly when cheap electricity is available. You schedule your dishwasher and washing machine to those windows and you are done. No dashboard required.

The trade-off is that Cosy's cheap rates, while good, do not reach the lows that Agile achieves on its best nights. On a windy winter evening when Agile overnight prices hit 1p or go negative, Cosy customers are not capturing that extreme value. Over a full year, engaged Agile households consistently save more than Cosy households.

The verdict: Cosy is the right choice for households that want structured simplicity, particularly with a heat pump. Agile is the right choice for households willing to check a dashboard and shift loads dynamically. Both are far better than the price cap.

Agile vs fixed tariff: the 2026 verdict

Fixed tariffs in 2026 are typically priced at 24-27p/kWh - roughly in line with or slightly below the July 2026 price cap of 26.11p/kWh. The appeal of a fixed tariff is certainty: you know what your electricity will cost for the next 6, 12, or 24 months regardless of what happens to wholesale prices.

Against Agile, the fixed tariff case is weak for most households. Agile overnight rates of 3-8p/kWh represent a 70-85% discount against fixed tariff rates. Even if you cannot shift much daytime consumption, the ability to run washing machines, dishwashers, and EV charging at night at 3-8p instead of 26p is an enormous saving.

The case for a fixed tariff over Agile exists only in a narrow scenario: a household with genuinely immovable high peak usage, no flexibility to shift loads, and significant anxiety about price volatility. If you work shifts, have young children with rigid schedules, and cannot run your washing machine at 2am for lifestyle reasons, a fixed tariff removes the cognitive load of Agile entirely.

But even households with moderate flexibility - those who can run one or two appliances overnight - will save money on Agile versus a fixed deal. The worst Agile period (a cold, calm weekday evening in a demand spike) still only triggers the Ofgem price cap as the maximum unit rate. Agile has a built-in ceiling. Fixed tariffs remove upside potential as well as downside risk.

For 2026, our assessment is that Agile outperforms fixed tariffs for any household with even modest behavioural flexibility. Use AgileAlert for two weeks before making this decision. If you find yourself naturally checking prices each evening and shifting loads, Agile will save you substantially more than any fixed deal available at today's rates.

Choosing the right tariff: a decision tree

Use this framework to identify which tariff fits your situation. Work through the questions in order.

Do you have an electric vehicle?

Yes, and I have a compatible smart charger and do not want to manage prices manually: choose Intelligent Octopus Go. The automation handles your cheapest charging automatically.

Yes, and I am happy to check prices and schedule charging myself: Agile will typically save more, particularly on high-mileage vehicles with large batteries.

Do you have solar panels and battery storage?

Yes, with a large array and high export: model Octopus Flux against Agile based on your actual export volume. Flux may win if your export income is substantial.

Yes, but with modest export and high import: Agile with standard export tariff typically wins.

Do you have a heat pump?

Yes, and I want predictable cheap windows without daily price checking: Octopus Cosy is designed for this scenario.

Yes, but I am willing to optimise against daily prices: Agile will deliver higher savings.

Are you on Economy 7 with storage heaters or an immersion heater?

Yes: switch to Agile. Get a smart meter, move away from Economy 7, and benefit from overnight rates that are typically half what Economy 7 charges. This is one of the clearest wins available in the UK domestic tariff market right now.

Do you have any flexibility at all in when you use electricity?

Yes, even just for laundry and dishwashing: Agile with AgileAlert for daily price guidance will save you money.

Genuinely no - completely fixed usage at all hours: fixed tariff or Standard Variable Tariff removes price anxiety, but you lose the upside of cheap overnight slots.

Can I switch between smart tariffs without penalty?

Yes. All variable and flexible Octopus tariffs - Agile, Intelligent Go, Cosy, Flux - carry no exit fees and no fixed term. You can move between them through your Octopus account without penalty, typically with a few days' notice for the switch to take effect.

This is a genuinely valuable feature that many households underuse. You can try Cosy for a winter month, switch to Agile for the summer, return to Cosy with your heat pump in autumn, and never pay a penny in switching fees. The ability to optimise your tariff seasonally - or as your household circumstances change - is a significant advantage over fixed-term deals.

Fixed-term deals from any supplier may carry exit fees, typically £30-75 per fuel. Check your specific contract before switching away from a fixed tariff. Octopus's own fixed-term products vary in their exit fee structure, so read the terms before committing.

Gas tariffs are entirely separate from electricity tariffs. You can be on Octopus Agile for electricity and a standard variable or fixed tariff for gas simultaneously. The two fuels are billed independently and choosing a smart electricity tariff does not commit you to any particular gas arrangement.

Frequently asked questions