Octopus Tracker vs Flexible: Which Is Better?

Octopus Tracker and Flexible Octopus are both variable energy tariffs, but their prices are set very differently.

Octopus Tracker changes its electricity and gas unit rates every day using a formula linked to wholesale energy prices. Flexible Octopus is Octopus Energy’s standard variable tariff, with prices protected by the Ofgem energy price cap and normally changing much less frequently.

Tracker has often been cheaper than Flexible historically, but that does not mean it will always be the cheaper option.

The main choice is whether you would rather have closer exposure to wholesale energy prices, with the opportunity to benefit quickly when they fall, or the greater protection from short-term price spikes provided by Flexible.

Octopus Tracker vs Flexible Octopus Comparison

For most people choosing between the two, the biggest question is whether the potential savings from Tracker are worth accepting a unit rate that can change every day.

Is Octopus Tracker cheaper than Flexible?

Tracker can be cheaper than Flexible, and it has spent significant periods below Octopus’s standard variable tariff historically.

However, there is no guarantee that will continue.

In May 2026, Octopus reported that Tracker customers had saved an average of £148 over the previous 12 months compared with its standard variable tariff.

That is useful historical evidence, but it should not be treated as a prediction of future savings.

Tracker follows movements in wholesale energy prices much more closely than Flexible. If wholesale prices fall, Tracker can become cheaper relatively quickly.

The opposite is also true.

If wholesale prices increase, Tracker rates can rise with them and may move above Flexible.

Flexible customers are more insulated from these short-term movements because their tariff is protected by the Ofgem energy price cap and its rates normally remain unchanged for longer periods.

There is therefore no permanent answer to whether Tracker or Flexible is cheaper.

How do Octopus Tracker prices work?

Tracker uses a published pricing formula linked to wholesale electricity and gas prices.

Octopus calculates a new electricity unit rate and gas unit rate for each day.

If wholesale prices fall, that can feed through to Tracker customers relatively quickly.

If they rise, Tracker customers can also see their unit rates increase quickly.

Tracker is different from a time-of-use tariff such as Agile Octopus.

Your electricity price does not change depending on the time of day.

If today’s Tracker electricity price is 20p/kWh, for example, you pay that same 20p/kWh whether you use electricity at 2am, midday or 6pm.

The rate then has the potential to change again the following day.

You can read more about eligibility, pricing and how the tariff works in our complete Octopus Tracker guide.

Is Octopus Tracker fixed for 12 months?

Tracker can be slightly confusing because it is a 12-month tariff, but your electricity and gas unit rates are not fixed for those 12 months.

Instead, the following are fixed for your tariff term:

• the Tracker pricing formula
• your standing charge

The unit rate produced by that formula can change every day.

So, in simple terms:

Fixed: the formula used to calculate your rates and your standing charge.

Variable: the amount you actually pay per kWh each day.

When your 12-month Tracker term ends, you can choose whether to move onto the version of Tracker available at that time or select another tariff.

How does Flexible Octopus work?

Flexible Octopus is Octopus Energy’s standard variable tariff.

Unlike Tracker, its rates do not change every day.

Flexible prices normally remain unchanged for longer periods and tend to move in line with Ofgem’s quarterly energy price cap periods.

These run from:

• January to March
• April to June
• July to September
• October to December

The Ofgem energy price cap limits the maximum unit rates and standing charges that suppliers can charge customers on standard variable tariffs.

It does not cap your total bill.

If you use more energy, you still pay more.

Octopus also typically prices Flexible below the maximum level permitted by the Ofgem price cap.

Flexible does not require a smart meter, has no fixed tariff term and has no exit fee.

What is the biggest difference between Tracker and Flexible?

The biggest difference is how quickly your energy prices react to changes in the wholesale market.

Tracker follows wholesale energy prices closely and recalculates its unit rates every day.

Flexible changes much more slowly.

Imagine wholesale energy prices fall considerably.

Tracker customers could begin seeing lower rates within days.

Flexible customers may continue paying the same unit rate until Octopus changes its standard variable tariff prices.

But if wholesale prices suddenly increase, the reverse can happen.

Tracker can increase quickly while Flexible customers remain protected by their existing rates and the Ofgem price cap.

That difference is the main trade-off between the two tariffs.

Is Octopus Tracker protected by the Ofgem price cap?

No.

Tracker does not receive the same Ofgem price cap protection as Flexible Octopus.

Instead, Tracker has its own maximum rates through Octopus’s Price Cap Protect.

The current maximum Tracker unit rates are:

• Electricity: 100p/kWh
• Gas: 30p/kWh

These limits are considerably higher than the unit rates normally associated with a standard variable tariff.

That means Tracker’s Price Cap Protect should not be interpreted as a guarantee that Tracker will remain close to Flexible.

It is primarily protection against particularly extreme wholesale market conditions.

Flexible works differently.

Because it is a standard variable tariff, the maximum rates that can be charged are restricted by the Ofgem energy price cap.

What happens if Tracker prices rise above Flexible?

There can be days, weeks or potentially longer periods when Tracker costs more per kWh than Flexible.

That is part of the risk you accept when choosing a tariff linked more directly to the wholesale market.

You are not locked into Tracker if this happens.

Tracker currently has no exit fee, so you can move onto another Octopus tariff or change supplier.

However, there is an important restriction to consider before leaving.

If you leave Tracker during your 12-month tariff term, you will normally need to wait nine months before rejoining Tracker.

That makes it harder to simply leave Tracker when wholesale prices rise and immediately return when they fall again.

Does Tracker have an exit fee?

No.

There is currently no exit fee for leaving Octopus Tracker.

However:

Leaving Tracker during your 12-month term normally means you cannot rejoin Tracker for nine months.

This distinction is important.

Having no exit fee means Octopus does not charge you a financial penalty for leaving.

It does not mean there are no consequences to switching away.

If Tracker prices subsequently fall shortly after you leave, you may be unable to return immediately.

If you reach the end of your Tracker term and choose not to renew, the same nine-month restriction does not normally apply in the same way.

Do you need to change when you use electricity on Tracker?

No.

This is one of Tracker’s biggest differences from Agile Octopus.

Tracker has one electricity price for the entire day.

Moving your washing machine from 6pm to midnight on the same Tracker day will not reduce the unit rate you pay.

You do not therefore need to avoid particular peak hours or schedule appliances overnight simply because you are on Tracker.

There can occasionally be an opportunity to move flexible consumption between different days.

For example, if tomorrow’s Tracker rate is significantly cheaper than today’s, you could choose to postpone discretionary electricity use until the following day.

But actively shifting usage is not necessary to use Tracker.

If you want an electricity tariff where the time of day directly affects what you pay, see our Agile Octopus guide.

Who could Octopus Tracker suit?

Tracker could be worth considering if:

• you have a compatible working smart meter
• you are comfortable with your unit rates changing each day
• you want closer exposure to wholesale energy prices
• you want the opportunity to benefit quickly when wholesale prices fall
• you do not want to manage different peak and off-peak periods
• you understand that Tracker can sometimes cost more than Flexible
• you can tolerate some variation in your energy costs

You do not need to check the Tracker price every morning to use the tariff.

The same rate applies throughout each day, so there is no requirement to constantly manage when you use electricity.

Who could Flexible Octopus suit?

Flexible could make more sense if:

• you do not have a compatible smart meter
• you would rather your energy rates did not change every day
• you want the protection provided by the Ofgem energy price cap
• greater pricing stability is important to you
• you do not want closer exposure to wholesale market volatility
• you are waiting for a smart meter before moving onto another Octopus tariff

Flexible can also be a useful starting point for customers who have recently joined Octopus.

If you plan to move onto a smart tariff such as Tracker, Agile or Intelligent Octopus Go, you may initially remain on a conventional tariff while Octopus connects to your smart meter and confirms that it is sending the necessary readings.

Do you need a smart meter for Tracker?

Yes.

Octopus currently requires customers joining Tracker to have a compatible working smart meter that it can communicate with.

This is different from Flexible Octopus, where a smart meter is not required simply to be on the tariff.

If you do not yet have a suitable smart meter, you can potentially join Octopus on another tariff first and arrange the smart-meter requirements afterwards.

Once your meter is working correctly and Octopus is receiving the necessary data, you can then apply to move onto Tracker.

Can you switch from Flexible to Tracker?

Yes.

If you are already an Octopus Energy customer on Flexible and have a compatible working smart meter, you can apply to move onto Tracker.

You’ll need to accept the applicable Tracker and smart-tariff terms.

If your smart meter is not yet communicating properly, you may need to resolve that before the move can be completed.

If you are not currently an Octopus customer, you can first switch to Octopus Energy.

Once your supply is with Octopus and the smart-meter requirements are met, you can then move onto Tracker.

Can you switch from Tracker back to Flexible?

Yes.

Tracker has no exit fee, so you can leave and move onto another eligible tariff.

Flexible is one of the options you may consider if you no longer want your unit rates changing every day.

The main thing to remember is Tracker’s rejoining restriction.

If you leave Tracker during your 12-month term, you will normally need to wait nine months before returning.

You should therefore consider whether you are comfortable giving up access to Tracker for that period before moving away because of a short-term increase in wholesale prices.

What about other Octopus tariffs?

Tracker and Flexible are relatively straightforward because neither requires you to organise electricity use around different prices throughout each day.

But they are not necessarily the most appropriate tariffs for every household.

Agile Octopus

Agile Octopus has electricity prices that change every 30 minutes.

It could be worth exploring if you can move significant electricity use into cheaper periods and avoid expensive half hours.

Unlike Tracker, when you use electricity matters considerably on Agile.

Intelligent Octopus Go

If you regularly charge an electric car at home, Intelligent Octopus Go can provide much cheaper electricity for eligible EV charging.

A dedicated EV tariff can therefore be more relevant than comparing Tracker and Flexible purely on their standard electricity rates.

Cosy Octopus

Homes with a heat pump or other eligible electric heating can consider Cosy Octopus.

It provides three cheaper electricity periods every day, with the tariff designed around the energy needs of electrically heated homes.

You can see the wider range of options in our Octopus Energy tariff guide.

Octopus Tracker vs Flexible: which should you choose?

Neither tariff is guaranteed to be cheaper in every market condition.

The decision largely comes down to how much price volatility you are comfortable accepting.

Tracker could suit you if you want your prices to follow wholesale energy markets more closely and are comfortable with the possibility that your unit rates can change every day.

It can react quickly when wholesale prices fall, but it can also become more expensive quickly when prices rise.

Flexible could suit you if you prefer rates that change less frequently and value the additional protection provided by the Ofgem energy price cap.

You give up some of Tracker’s ability to benefit quickly from falling wholesale prices in return for greater protection from short-term market spikes.

Tracker has produced savings compared with Flexible over previous periods, but historical savings do not guarantee what will happen next.

The choice is therefore less about identifying a tariff that is permanently cheaper and more about deciding which pricing model better matches the amount of risk and price variation you are comfortable with.

Frequently asked questions

Is Octopus Tracker cheaper than Flexible?

It can be, but there is no guarantee.

Tracker has historically spent periods below Flexible and Octopus reported in May 2026 that Tracker customers had saved an average of £148 over the previous 12 months compared with its standard variable tariff.

However, Tracker rates can also move above Flexible when wholesale prices rise.

Does Octopus Tracker change price every day?

It can.

Tracker calculates its unit rates each day using wholesale energy prices and its pricing formula.

The rate does not change throughout that individual day.

Does Tracker change price every half hour?

No.

Tracker has one electricity rate for each day.

Agile Octopus is the tariff where electricity prices change every 30 minutes.

Is Octopus Tracker protected by the energy price cap?

Not by the Ofgem price cap that protects standard variable tariffs such as Flexible Octopus.

Tracker instead has its own Price Cap Protect, currently limiting the maximum unit rate to 100p/kWh for electricity and 30p/kWh for gas.

Those limits are considerably higher than typical standard-tariff rates.

Can Tracker be more expensive than Flexible?

Yes.

When wholesale energy prices rise, Tracker can move above Flexible.

Tracker should not be viewed as a permanently cheaper version of Flexible.

Is Octopus Tracker a fixed tariff?

Tracker has a 12-month tariff term, but your unit rates are not fixed.

The pricing formula and standing charge are fixed for the term, while the electricity and gas rates produced by the formula can change every day.

Do I need a smart meter for Tracker?

Yes.

You currently need a compatible working smart meter before joining Octopus Tracker.

A smart meter is not required simply to be on Flexible Octopus.

Does Tracker have an exit fee?

No.

You can leave Tracker without paying an exit fee.

However, if you leave during your 12-month term, you will normally need to wait nine months before rejoining Tracker.

Can I move from Tracker to Flexible?

Yes.

You can move away from Tracker without an exit fee, although the nine-month Tracker rejoining restriction should be considered before switching.

Do I have to check Tracker prices every day?

No.

The same Tracker electricity price applies throughout each day.

You may want to keep an eye on longer-term price movements, but you do not have to actively manage your electricity use around different times of day.

Is Tracker better than Agile?

They work differently.

Tracker gives you one wholesale-linked electricity rate for each day.

Agile has 48 different electricity prices every day.

Tracker is generally simpler, while Agile creates greater opportunities for households that can shift significant amounts of electricity use into cheaper half-hour periods.

Tariff rates, eligibility and terms can change. Always check the prices and tariff terms shown by Octopus Energy before switching.