Intelligent Octopus Go Review: The 7p Benchmark, Honestly
The UK’s favourite EV tariff: ~7–8p nights for the car and the house. It earns the hype — but the day-rate catch, the boost trap and the new 6-hour limit deserve a straight telling.
The short answer
Intelligent Octopus Go is the UK’s favourite EV tariff — over half of all smart-EV-tariff customers are on it — and it deserves the position. You get ~7–8p/kWh (regional, fixed and variable versions vary) in a guaranteed 23:30–05:30 window that covers your whole house, plus smart-dispatched bonus cheap slots beyond it. Octopus schedules the charging automatically — plug in, set “80% by 7am,” done. Its own data shows fixed-tariff customers saving an average £771 a year; conservative estimates still land £330+ for a 7,000-mile driver. That’s roughly 2p a mile.
The honest print: the ~33.7p day rate runs higher than some rivals’ — heavy daytime homes should compare whole bills, not headline rates; the boost button bills at the day rate (the tariff’s classic bill surprise); you need a compatible car or charger plus a communicating smart meter; and 2026’s new 6-hour limit trims the old unlimited-dispatch generosity. We score it 4.5/5 — the highest score we’ve given, and it’s earned. Full rates, the changes, and who should pick plain Go instead, below.
What this review covers
Every EV tariff in Britain is measured against this one, which makes an honest review harder than a bad product would: the job isn’t finding hidden failure, it’s giving the genuine catches their proper weight next to genuine excellence. Here’s both.
How Intelligent Octopus Go actually works
The deal is simple: you hand Octopus the scheduling, and Octopus hands you a cheaper rate. Plug in whenever you get home, tell the app the charge level you need and when (“80% by 7am”), and the platform schedules your charging into the cheapest half-hourly periods — via your car’s own connectivity or a compatible smart charger — using live wholesale price signals. Because Octopus controls when the load lands, it can price the tariff below its own fixed-window Go, and on quiet nights the dispatched cheap slots can stretch well past the core window. Two mechanics worth knowing on day one: any smart-scheduled charging outside the window is also billed at the cheap rate for your whole home — a quiet bonus — while the boost button (charge right now) bills at the day rate, the single most common bill surprise on the tariff. And run one brain only: clear every schedule in the car’s app and the charger’s app, or they’ll fight Octopus’s scheduling — the cause of most “it didn’t charge my car” complaints.
2026 rates & times: the honest picture
| Element | Intelligent Octopus Go (2026) |
|---|---|
| Off-peak rate | ~7–8p/kWh (regional; some areas lower after the April 2026 cuts) |
| Guaranteed window | 23:30–05:30 — six hours, whole house included |
| Bonus slots | Smart-dispatched beyond the window, also at the cheap rate |
| Day rate | ~33–34p — above the cap’s ~26p unit rate |
| Versions | Fixed (12 months) or variable — both no exit fees |
| vs standard tariff | Up to ~69% off overnight units |
Why “~7–8p” rather than one number: Octopus’s own pages quote “from 8p”, while the April 2026 levy-removal cuts dropped regional fixed rates by up to 39% — as low as ~5.5p in the cheapest areas — and fixed and variable versions drift apart over time. Treat every article’s number (including ours) as a snapshot and check your postcode’s live rate before switching. The structural points are stable: six guaranteed hours, whole-house coverage, bonus dispatch, and a day rate that runs above the price cap’s unit rate — which is where the honest maths in the catches section comes in.
Intelligent Go vs Octopus Go: the two-minute decision
Octopus Go is the simple sibling: a fixed five-hour window at ~8.5p, compatible with any car and any charger — a timer does it, even a granny lead. Intelligent is cheaper, runs six guaranteed hours plus dispatch, and wraps the whole house into every scheduled charging period — but needs Octopus to control the charging, which means compatible kit. The rule: if you have (or will buy) a compatible car or charger, Intelligent wins clearly — more cheap hours, lower rate, zero effort. If nothing you own qualifies and you don’t want new hardware, plain Go captures most of the saving and stays one of the market’s best fallbacks.
The 2026 changes — and the EV Saver discount
The 6-hour limit, Charge Cap, and an extra 1p for Octopus EV drivers
If you searched “Intelligent Octopus Go changes,” here’s the answer. From early 2026, super-cheap smart charging is automatically capped at the six cheapest hours per night — previously, heavy chargers sometimes enjoyed near-unlimited dispatched cheap hours, and that generosity is now trimmed to keep the headline rate low. Alongside it came Charge Cap, a toggle letting you choose: cap charging at the six cheapest hours, or hit your charge target even if some charging lands outside them (billed accordingly). For typical drivers six hours is plenty — 40kWh+ overnight on a 7kW charger — and Octopus softened the transition by not passing January’s price-cap rise to Intelligent Go variable customers. Separately, EV Saver answers the other trending search: an exclusive variant for Octopus Electric Vehicles leasing customers, taking an extra 1p off the off-peak fixed rate. If you lease through Octopus EV it’s free money — join Intelligent Octopus Go first, then claim EV Saver through your Octopus EV account.
Eligibility & setup: the three requirements
You need: Octopus as your electricity supplier; a working smart meter doing half-hourly readings (SMETS2 or a Secure-brand SMETS1 — allow ~14 days for Octopus to connect it); and a compatible car or compatible charger. The car route covers 280+ vehicles — most Tesla, BMW, Mini, Audi, VW, Porsche and Renault models — and if yours qualifies, any charger works, even a basic one. The charger route (Ohme, Hypervolt, Indra, Zappi, Andersen, Easee, Pod Point and more) works with any car. Our compatible chargers guide carries the full list, the model-generation caveats, and which charger to buy if you need one — the short version being: check the car first, because plenty of people buy a £700 “compatible” charger their Tesla never needed. Practical extras: two EVs on one account works fine (the scheduler juggles both), and Zappi owners should hand scheduling to Octopus rather than running myenergi timers alongside — one brain, always.
The savings maths — real numbers, both versions
Octopus’s own analysis of actual half-hourly usage shows fixed Intelligent Go customers saving £771 a year on average versus its standard variable tariff — a figure with real data behind it, though it reflects households already good at shifting usage. Conservative independent estimates put a 7,000-mile driver £330–£420 a year ahead of the price cap. Per mile, home charging lands near 2p — versus ~8p on a standard tariff and 15p+ on public rapids. Then the whole-house layer: dishwasher and washing machine into the window, and — the play this site cares about — a home battery filled at 7–8p overnight to run the house all day, the strongest version of the battery arbitrage maths, and the reason tariff, battery and charger are really one design decision. Add solar and an export tariff (the export side is its own comparison) and the stack compounds further.
The catches — given their proper weight
The day rate. At ~33.7p in typical regions, Intelligent Go’s peak rate runs above the price cap’s unit rate and above some rivals’ EV-tariff day rates. If your household’s heavy usage is unavoidably daytime and evening — electric heating on all day, home business — the cheap nights can be outweighed. Compare whole projected bills, not headline rates; for most shiftable households the maths still wins comfortably, but it’s a calculation, not a given.
The boost trap. Urgent top-up charges bill at the day rate. Plan around the ready-by time and the boost button stays unpressed.
The meter dependency. Smart tariffs live on half-hourly readings; if your meter stops communicating, billing gets messy until it’s fixed. Check your meter’s comms health before switching, not after.
The kit requirement and the 6-hour trim. Compatible car or charger required (the spoke guide covers escape routes), and very-high-mileage drivers who enjoyed the old unlimited dispatch will feel the new cap most. Neither changes the verdict for typical households; both belong in it.
Our score: 4.5 / 5
Intelligent Octopus Go — the benchmark, and still the buy
The bottom line: The cheapest-class overnight rate in Britain, covering the whole house, scheduled for you, with no exit fees and £771/yr average savings on Octopus’s own customer data — Intelligent Octopus Go is the rare market leader that deserves it. Check the day rate against your daytime usage, dodge the boost button, keep one scheduling brain, and note the new 6-hour cap. For any EV household that can shift usage overnight: this is the tariff to beat, and nothing currently beats it.
Get my free quotes →Intelligent Octopus Go: pros & cons
✓ Pros
- ~7–8p overnight — cheapest-class rate in the UK
- Whole house gets the cheap rate, not just the car
- Six guaranteed hours + smart-dispatched bonus slots
- Effortless: plug in, set ready-by, done
- £771/yr average saving (Octopus customer data)
- Fixed or variable, both with no exit fees
✗ Cons
- ~33.7p day rate — above cap and some rivals
- Boost charges bill at the day rate
- Needs a compatible car or charger + smart meter
- 2026’s 6-hour limit trims the old dispatch generosity
- Meter comms failures make billing messy
- Rates vary by region — headline numbers mislead
Frequently asked questions
What are the rates and times in 2026?
~7–8p/kWh off-peak (regional; some areas lower after April 2026’s cuts) in a guaranteed 23:30–05:30 window covering the whole house, plus dispatched bonus slots at the same cheap rate. Day rate ~33–34p. Fixed (12m) and variable versions, no exit fees. Check your postcode’s live rate — snapshots age fast.
How does it work?
Plug in, tell the app your target and ready-by time, and Octopus schedules charging into the cheapest half-hourly slots via your car’s API or a compatible charger. Scheduled charging outside the window is also cheap-rate for the whole home; the boost button bills at the day rate. Clear all other charging schedules — one brain only.
Intelligent Go vs Octopus Go?
Go: fixed 5-hour window ~8.5p, works with any car/charger on a timer. Intelligent: cheaper, 6 guaranteed hours + dispatch, whole-house coverage — but needs compatible kit. Have (or will buy) compatible kit: Intelligent. Otherwise Go still captures most of the saving.
What changed in 2026 — and what’s EV Saver?
The 6-hour limit now caps super-cheap smart charging at the six cheapest hours nightly, with the new Charge Cap toggle choosing between that cap and hitting your target regardless. EV Saver is an extra 1p off the off-peak fixed rate, exclusive to Octopus EV leasing drivers — join IOG first, then claim it via your Octopus EV account.
Who’s eligible — which cars and chargers work?
Octopus supply + smart meter (SMETS2/Secure SMETS1) + a compatible car (280+: Tesla, BMW, VW, Audi, Mini, Porsche, Renault and more — then any charger works) or compatible charger (Ohme, Zappi, Hypervolt, Indra, etc. — then any car works). Two cars on one account is fine. Full hardware detail in our compatible chargers guide.
Is it worth it — real savings?
Octopus’s own half-hourly data: £771/yr average for fixed customers. Conservative estimates: £330–£420/yr at 7,000 miles. Roughly 2p/mile at home. Add whole-house shifting and battery arbitrage and it grows. The exception: heavy unavoidable daytime usage — compare whole bills against the ~33.7p day rate first.
The verdict
Reviews on this site exist to find the catch, and Intelligent Octopus Go’s catches are real — the day-rate premium, the boost trap, the kit requirement, the 6-hour trim. Weighed honestly, they’re the small print on the best mainstream energy product in Britain: a ~7–8p overnight rate that covers your whole home, schedules itself, saves its average customer £771 a year on the supplier’s own data, and locks you into nothing. Half the smart-tariff market has voted with its meters, and they’re right.
The advice by household: shiftable-usage EV homes — switch, set the ready-by time, and put the dishwasher on at midnight. Heavy daytime users — run the whole-bill comparison before believing any headline rate, ours included. Octopus EV lessees — claim your extra penny. And anyone building the bigger picture — the tariff is one corner of a triangle with solar and a battery, and designed together they beat anything designed apart. A couple of free, no-obligation quotes from MCS-certified installers will show you what the other two corners cost and earn for your home.
Important
Going Solar UK is an introduction service, not an installer, energy supplier or financial adviser. This review reflects publicly listed rates, terms and features as of August 2026: tariff rates vary by region and version (fixed/variable), change with the market, and scheme features evolve – always confirm live rates, eligibility and terms directly with Octopus Energy before switching. Savings figures are estimates or supplier-reported averages, not guarantees. Scores are our honest editorial opinion. Going Solar UK has no commercial relationship with Octopus Energy.
We may receive a commission when we introduce you to an installer, at no cost to you. Any contract for work is directly between you and the installer.