Octopus Energy Tariff Comparison

Every figure on this page is fetched live, in your browser, directly from Octopus Energy's public API (api.octopus.energy) — nothing is cached or hand-maintained by Considered, so it reflects whatever Octopus currently has live for your region.

For tariffs with a single flat unit rate (Fixed, standard Flexible), the unit rate shown is that published rate. For time-of-use tariffs — Agile, Go, Intelligent Go, Cosy, Flux, Tracker — the unit rate shown is a duration-weighted average of the actual rates over the last 48 hours, not a personalised forecast. These tariffs change price through the day (Agile every 30 minutes, Go and Cosy between a cheap window and a standard rate), so your real annual cost depends heavily on when you actually use electricity. If you can shift meaningful usage — EV charging, a home battery, a washing machine — into the cheap periods, your real cost could be noticeably better than the average shown. If you can't, it could be worse.

In import mode, estimated annual cost = (standing charge × 365) + (unit rate × your entered annual kWh), using rates inclusive of VAT. It excludes any welcome credit, referral credit, Warm Home Discount, or account-specific adjustment, and assumes monthly Direct Debit, the most common payment method.

In export mode, this compares Octopus's solar export/outgoing tariffs instead — what you're paid per kWh sent back to the grid. Estimated annual income = unit export rate × your entered annual exported kWh. Export tariffs don't carry a standing charge, and most require a smart export meter or a compatible inverter reading, which is not separately checked here.

Both modes cover domestic electricity tariffs only — gas and business tariffs aren't included. Agile, Go, Intelligent Go, Cosy, Flux and Tracker (and their export equivalents) all require a compatible smart meter capable of half-hourly readings, flagged on each card. Prepayment-meter tariffs are flagged too.

Go, Intelligent Go, Cosy and Flux cards also show the peak and off-peak rate separately, alongside the blended average used for the cost estimate above, plus a plain "X hours off-peak" badge and the actual daily cheap/expensive windows written out (e.g. Intelligent Go: 6 hours off-peak, 23:30–05:30) — this part is fixed text sourced from Octopus's own tariff pages and smart-tariff terms, not pulled live, since Octopus's API doesn't expose it. Three of these — Intelligent Go, Cosy and Flux — also have a genuine eligibility requirement to join (a compatible EV, a heat pump, or solar plus a battery), flagged with an orange badge and noted on the card; Agile and standard Go don't. Agile changes price every 30 minutes with no fixed window, and Tracker is a single rate for the whole day, so neither gets a peak/off-peak breakdown or window badge — showing one would suggest a stability those tariffs don't have.

By default, Intelligent Go, Cosy and Flux are hidden from the results (and from the "cheapest overall" ranking) since most visitors don't have the EV, heat pump, or solar-plus-battery they need. The toggles above the results reveal them: turn one on to see that tariff join the comparison and, if it's cheaper, become the new "cheapest overall" — a quick way to check what having an EV, heat pump or battery would actually do to your bill, without committing to anything. If you tell the tool what you're currently paying and it's one of these three, the matching toggle switches on automatically, since being on it already means you qualify. The "already with Octopus?" dropdown always lists every live tariff regardless of these toggles, so you can select your actual current tariff either way.

If you tell the tool what you're currently paying (or currently getting paid, in export mode), that figure is compared the same way — standing charge and usage or export included — against the cheapest or best-paying live tariff found. It's only ever as accurate as the rate you enter, so use a recent bill or your Octopus online account rather than guessing.

This is an independent estimate for comparison only, not a quote — check the exact tariff, its terms and any current switching offer on Octopus's own site before you commit.

v1.8 — Intelligent Go, Cosy and Flux are now hidden from the results by default, since most visitors don't have the EV, heat pump or solar-plus-battery they need — there's no point seeing a tariff you can't actually switch to. New toggles above the results ("I have an EV" / "I have a heat pump" / "I have solar + a battery") bring them back in, so you can check what having one of these would actually do to your bill without committing to anything. Selecting one of these three as your current tariff switches the matching toggle on automatically. The "already with Octopus?" dropdown still lists every live tariff regardless, so your actual current tariff is always there to pick.

v1.7 — Simplified the off-peak/peak window info added in v1.6: each windowed tariff card now leads with a plain "X hours off-peak" (or "X hours cheap") badge, and the note underneath now states the duration in words before the exact times — e.g. "6 hours off-peak, every night: 23:30–05:30" rather than just the times on their own.

v1.6 — Go, Intelligent Go, Cosy and Flux cards now show the peak and off-peak rate separately (not just the blended average), plus the actual daily cheap/expensive windows — e.g. Intelligent Go's 23:30–05:30 off-peak period. Intelligent Go, Cosy and Flux also get an orange badge and a plain-English note when they have a genuine eligibility requirement to join — a compatible EV, a heat pump, or solar plus a battery — since these aren't switches everyone can actually make. When "predictable" is selected as what matters most, these four now also get a note that their cheap window is fixed at the same time every day, separate from whether the rate itself is fixed.

v1.5 — Fixed a follow-on issue from the v1.4 Octopus Zero exclusion: a visitor who'd loaded the tool shortly before v1.4 went live could still see Octopus Zero for up to 3 hours afterwards, because tariff data is cached in the browser and the cache wasn't aware the filtering rules had changed. The cache now carries a version tag, so a rule change like this invalidates any older cached result immediately rather than waiting out its cache window.

v1.4 — Excluded Octopus's "Zero" tariffs (Octopus Zero Import/Export) from the comparison. These show as £0/kWh with no standing charge in Octopus's public product list, which made them appear to always win as "cheapest" — but they're restricted to homes already registered in Octopus's Zero Bills new-build program (with solar, battery and often a heat pump pre-installed as part of the property) and capped by a fair-use import allowance, not something an existing customer can switch to. Everything else in the comparison is unaffected.

v1.3 — The "already with Octopus?" comparison now lives in the results, as a dropdown of the live tariffs just fetched for your region — pick yours and your unit rate, standing charge and (for Agile, Go, Cosy, Flux and Tracker) the peak/off-peak split are filled in automatically, no bill or app needed. Legacy or closed tariffs that no longer appear in Octopus's live product list can still be compared by choosing "enter manually" from the same dropdown. Works in both import and export mode.

v1.2 — Added a way for existing Octopus customers to check whether they're on the best available rate: an optional step where you enter what you're currently paying (or currently getting paid, in export mode) from a recent bill or the Octopus app, and the results show a direct comparison against the cheapest — or best-paying — live tariff found, with an estimated saving (or extra income) if switching would help, or a clear "you're already on a competitive rate" if it wouldn't.

v1.1 — Added a solar export/outgoing tariff comparison as a second mode, alongside the original import comparison — toggle at the top of the tool. Fixed a bug where the results section was inheriting a "sticky" positioning rule meant for a different tool's two-column layout, causing it to stay pinned on screen and cover the referral banner and links underneath it while scrolling. Added a Reset button, and a visible version number in the hero, which was missing at launch.

v1.0 — Initial release. Live comparison of every currently available Octopus Energy domestic electricity tariff for a chosen UK grid region, fetched directly from Octopus's public API, ranked by estimated annual cost for the entered usage.