Explore the chart. Hover, focus or select any point to see its exact values.
Points are interactive: hover, focus or select one for exact values. Shaded band is the cheapest-to-dearest spread within each month; the line is the duration-weighted mean. 3 periods are drawn from part of the calendar rather than all of it: Oct 2022 (4 of 31 days), Nov 2022 (6 of 30 days), Sept 2026 (12 of 30 days). A month is partly counted where a version went on or came off sale inside it, and the current month is always still in progress. They are drawn hollow.
Each month shows the version of Octopus Tracker you could actually have signed up to then, so the line follows the tariff through its successive versions rather than any one product code. Older versions carry on publishing rates for months after they stop selling; those are not averaged in, because nobody could buy them. Drawn from the stored daily rollups across every payment method the tariff publishes; where a tariff publishes more than one, the rates above show the direct-debit one and this line sits between them.
Year archive
Choose a year above to see its prices.
Against the Ofgem price cap
Over 5 complete months, this tariff came in under the Ofgem cap in 4 of them.
Monthly cost on this tariff against the Ofgem price cap, most recent month last
Month
This tariff
Cap
Difference
April 2026
£57.47
£64.73
−£7.26
May 2026
£65.37
£66.88
−£1.51
June 2026
£61.82
£64.73
−£2.90
July 2026
£66.08
£69.90
−£3.82
August 2026
£72.04
£69.90
+£2.13
Both columns cost the same 2,500 kWh a year on the typical household consumption pattern, on a direct-debit basis — the basis the cap itself is set on. A negative difference means this tariff was cheaper. The cap is a cap on what you can be charged, not a price anyone is billed, so this compares this tariff against the maximum a capped tariff could have charged the same household.
Before you switch
Is Octopus Tracker a fit?
A quick suitability check before you compare the live price with your own home and usage.
Reviewed 24 August 2026
01
Essentials
You need
A compatible electricity meter and a currently available product version for your region.
02
Best fit
Works best if
You accept that the applicable unit rate can change from one day to the next.
03
Check carefully
Watch out for
Standing charges, eligibility, product versions and future rates can change the outcome.
04
Pairing
Compatible export choices
Check the current Octopus smart-tariff terms before pairing any export product.
Make the final check
How to verify or switch
1Check the exact tariff name, product version, regional quote, eligibility and current terms with Octopus Energy.
2Use OctoTariffs history and calculators as evidence, not as a supplier quote or guarantee of future cost.
EvidenceEligibility and tariff sourcesShow sourcesHide sources
Source details
Smart Tariffs terms and conditions— Octopus Energy; checked 2026-08-24. Smart-tariff eligibility, rate windows, compatibility and publication caveats.
Which product version this isRead more
v
Current product version
SILVER-26-04-01
Regional tariff reference
E-1R-SILVER-26-04-01-B
Used for the rates shown on this page.
About Octopus Tracker
Variable electricity rates tied directly to wholesale prices. Prices update daily, giving you access to lower rates when wholesale costs drop. Octopus Tracker offers a transparent pricing model: your rate is based on what Octopus pays for electricity on the wholesale market, each day Octopus sets a new rate from current wholesale prices, and you can see how wholesale prices affect your rate. Tracker rates can fluctuate. While you can save when wholesale prices are low, rates can also rise when wholesale costs increase, so this tariff carries more price risk than fixed-rate options.