Octopus Go vs Intelligent Octopus Go: which is cheaper?
Compare the likely costs in a way that matches how you actually use electricity — especially if you charge an EV at home. We explain what to check (meter, charging behaviour, timings), show two realistic scenarios, and help you decide which option may work out cheaper for your household.
- Answer-first summary plus a simple decision checklist
- Two UK-style examples with estimated numbers (no made-up tariff rates)
- Quick quote form to see live options for your postcode
Estimates only. Tariffs, rates, eligibility and charging behaviour vary by postcode, meter and supplier terms. Always check your personalised quote before switching.
Fast answer: Octopus Go vs Intelligent Octopus Go — which is cheaper?
Octopus Go vs Intelligent Octopus Go: which is cheaper depends mainly on how much electricity you can reliably shift into the cheapest charging hours — for many EV drivers, the option with the lower off-peak price (and the most usable off-peak time) usually works out cheaper per mile. The best way to confirm is to compare live rates for your postcode and model your typical weekly charging.
Most important check
How many kWh you can move into the off-peak window (EV charging, immersion heater, dishwasher, laundry), without disrupting your routine.
Likely winner
Whichever tariff gives you the cheapest off-peak energy that you can actually use (window length/timing matters as much as the headline price).
Avoid a common mistake
Choosing based on off-peak price alone. Standing charges, peak rates, and whether your charger/app setup qualifies can change the outcome.
Important: We don’t publish or guess live Octopus rates, windows or eligibility terms here. These can change and vary by region, meter set-up and payment method. Use the quote journey to see the current options for your postcode.
How to compare properly (without getting misled by the headline)
Both tariffs are designed for people who can shift a chunk of electricity into cheaper periods — most commonly EV charging. “Cheaper” is rarely one simple number. The right comparison is: (1) your off-peak kWh, (2) your peak kWh, and (3) your standing charge, all based on your actual usage pattern.
Step 1: estimate your EV charging kWh
A simple method: miles driven per week ÷ typical miles per kWh = kWh per week. Then check how many of those kWh can happen during off-peak.
Step 2: check what else can move off-peak
Laundry, dishwasher, immersion heater, some storage heating. If you don’t move it, you won’t get the cheaper rate.
Step 3: validate eligibility & practicality
Some smart tariffs require compatible meters, apps or device control. If you can’t meet the set-up, the cheaper rate may not apply.
Two realistic scenarios (estimated — you can swap in your own rates)
Scenario A: regular EV charging + good off-peak fit
Household: 1 EV, 180–220 miles/week, home charging mostly overnight. Can schedule charging reliably.
- Estimated EV energy
- ~55–75 kWh/week
- Off-peak share achievable
- High (often 70–90% of EV)
- What usually decides “cheaper”
- Lowest usable off-peak cost per kWh
If one tariff gives you more cheap kWh that you can actually use (due to timing/control), it often wins even if the peak rate is slightly higher.
Scenario B: occasional EV charging + low flexibility
Household: 1 EV, 40–80 miles/week, irregular charging, can’t always charge overnight (or uses public charging often).
- Estimated EV energy
- ~10–25 kWh/week
- Off-peak share achievable
- Low to medium
- What usually decides “cheaper”
- Peak rate + standing charge dominate
If you can’t use much off-peak, a time-of-use tariff can cost more overall than a competitive single-rate tariff — even if the off-peak price looks great.
Tip: If you have last year’s electricity usage in kWh (from bills or your online account), you can sanity-check any quote. Ofgem explains how to compare unit rates and standing charges on bills: Ofgem guidance on checking your energy bills.
See live options for your postcode
Get a whole-of-market comparison (where available) and check whether a smart or EV-focused tariff fits your household. No guesswork — you’ll see current rates and terms for your area.
What you’ll need (takes 2 minutes)
- Your postcode (to show region-specific rates)
- Rough annual electricity usage (if you know it), or your latest bill
- Whether you have a smart meter (helpful for smart tariffs)
Octopus Go vs Intelligent Octopus Go: what to compare
To decide which is cheaper for you, focus on the parts that drive your bill. The table below is a checklist of what to look up in your personalised quote (not a claim about current pricing or terms).
| What affects cost | Why it matters | What to check in your quote |
|---|---|---|
| Off-peak unit rate | This often drives EV charging costs. A small difference can matter if you charge a lot. | The off-peak p/kWh and the exact off-peak times offered for your meter/region. |
| Peak (daytime) unit rate | If most of your usage is at peak, the EV benefit may be outweighed. | Your day/peak p/kWh and any different weekend rates (if applicable). |
| Standing charge | Paid daily regardless of usage. Can swing the comparison if usage is low. | Electricity standing charge (and gas, if you’re comparing dual fuel). |
| Off-peak “usable hours” | A cheaper window is only valuable if it aligns with when you can charge/run appliances. | Whether you can complete most charging within that window given your charger power and routine. |
| Eligibility & set-up | If a tariff requires device control/compatibility, failing set-up can reduce the benefit. | Smart meter status, app access, supported EV/charger compatibility (where relevant). |
| Exit fees & contract terms | Some tariffs are flexible; others may have fixed terms or fees. | Any exit fees, contract length, and how/when rates can change. |
Decision checklist: who each option tends to suit
You’re more likely to benefit if…
- You can charge an EV at home most weeks
- You can reliably charge during the cheaper hours
- Your EV/charger set-up supports scheduled charging (or automation if required)
- You’re comfortable with time-of-use pricing and can shift some household loads off-peak
You may be better off avoiding (or double-checking) if…
- You rarely charge at home, or charging times are unpredictable
- Your household electricity use is mostly during peak hours
- You don’t have (or can’t get) a compatible smart meter set-up
- You have very low electricity usage (standing charge differences matter more)
Renters & flats: you can often still switch supplier, but smart meter access, meter location, and landlord permissions can affect installation or set-up. Citizens Advice explains switching basics: how to switch energy supplier.
Costs, exclusions and common pitfalls (UK-specific)
These are the issues that most often cause disappointment with EV/time-of-use tariffs. Checking them upfront helps you avoid switching to something that looks cheap but doesn’t match your home set-up.
1) Not enough off-peak usage
If you only shift a small amount, the peak unit rate (and standing charge) can outweigh savings. Time-of-use works best when a meaningful share of kWh moves off-peak.
2) Charging window doesn’t fit your routine
Even a low off-peak rate won’t help if you can’t complete most charging in the cheap period (for example due to late arrivals, early departures or limited charger power).
3) Smart meter / set-up constraints
Smart tariffs typically rely on half-hourly readings. If your meter can’t provide them (or isn’t enrolled correctly), tariff options may be limited.
4) Payment method differences
Rates can differ for Direct Debit, prepayment and other methods. Make sure you compare like-for-like for how you pay at home.
5) Standing charge sensitivity
If you live alone or have low usage, the standing charge can be a bigger part of your bill than unit rates. Always compare the full annual cost estimate.
6) Gas is separate
If you have gas too, switching electricity for an EV tariff doesn’t automatically mean your dual fuel is cheapest overall. Compare electricity and gas together.
Price cap context: The Ofgem price cap is a limit on unit rates and standing charges for standard variable tariffs, not a guarantee of what you personally pay (your usage matters). Ofgem explains the cap and how it works: Ofgem: energy price cap.
A quick “is it cheaper for me?” mini-calculation
Use your quoted prices (not ours) and plug in your likely off-peak share.
- Estimate monthly off-peak kWh (EV + shiftable appliances).
- Estimate monthly peak kWh (everything else).
- Total cost estimate = (off-peak kWh × off-peak rate) + (peak kWh × peak rate) + (standing charge × days).
When “cheaper” isn’t the only goal
Some households choose smart tariffs for convenience (automated charging) or to better match renewables. That’s valid — just check you’re not paying a large premium at peak times for a benefit you won’t use.
FAQs
Is Intelligent Octopus Go always cheaper than Octopus Go?
No. It can be cheaper if you can use the cheapest periods for a large share of your electricity (often EV charging). If most of your usage stays at peak times, the peak rate and standing charge can make it more expensive overall. Check your personalised quote and your realistic off-peak usage.
Do I need a smart meter for Octopus Go or Intelligent Octopus Go?
Often, yes — especially for tariffs that rely on half-hourly readings. Eligibility and metering requirements can change, so treat this as a “check before you switch” item. If you’re unsure, compare tariffs for your postcode and confirm the meter requirements in the tariff terms.
What if I can’t always charge during off-peak hours?
Then a time-of-use tariff may not be cheaper. The more charging that spills into peak times, the more you’ll pay at the higher rate. If your routine is unpredictable, consider comparing against competitive single-rate tariffs as well as EV-focused options.
Can I get these tariffs if I rent or live in a flat?
Usually you can switch supplier if you pay the bills, but practical issues can apply: meter access (communal cupboards), permission for smart meter work, or limits on installing a home charger. If you can’t charge at home, the off-peak benefit may be limited — compare on your full usage, not EV rates alone.
Are there exit fees if I switch away later?
It depends on the specific tariff terms at the time you join. Some tariffs are flexible, others can have fixed terms and exit fees. Always check the tariff summary before you agree to switch, especially if you expect your driving or charging habits to change.
How do I estimate my EV charging cost at home?
Estimate weekly kWh as miles driven ÷ miles per kWh (your car’s efficiency). Then multiply the kWh you can charge off-peak by the off-peak unit rate, and any remaining kWh by the peak rate. Add the electricity standing charge. This gives a realistic “all-in” view rather than relying on the cheapest headline rate.
Will switching affect my electricity supply or cause downtime?
Normally, no — switching supplier shouldn’t interrupt your electricity supply. The process is largely administrative, but timings can vary and there can be exceptions if there’s a problem with your meter or address details. Citizens Advice explains what to expect when switching: switching energy supplier.
Does the Ofgem price cap apply to Octopus Go or Intelligent Octopus Go?
The price cap applies to standard variable tariffs and limits unit rates and standing charges (it’s not a cap on your total bill). Smart or fixed tariffs can be priced differently and may not follow the cap structure. Use your quote’s tariff information and, if needed, read Ofgem’s overview: Ofgem: energy price cap.
Trust, methodology and sources
Page governance
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- August 2026
How we assess “which is cheaper” (our approach)
Because we don’t have your live postcode rates or your exact half-hourly usage profile on this page, we focus on a transparent, user-led comparison method:
- We model total bill impact using three components: off-peak kWh, peak kWh, and standing charge days.
- We prioritise usability (can you actually use the cheapest hours with your routine and charger power?).
- We highlight UK constraints (metering, payment method, tenancy practicalities, and contract terms like exit fees).
- We avoid publishing “live” rates and don’t claim one tariff is always cheapest — pricing and eligibility can change.
Limitations: The scenarios above use typical EV-energy maths and common household patterns, but your outcome depends on your postcode rates, tariff rules, smart meter status and real charging behaviour. Use the quote journey for exact pricing.
Sources we rely on for UK energy guidance
Ofgem: Energy price cap
How the cap works and what it covers.
Ofgem: Check your energy bills
Understanding unit rates and standing charges.
Citizens Advice: Switching energy supplier
Your rights and what to expect.
GOV.UK: Smart meters
Overview of smart meters and benefits.
Ready to check which is cheaper for your home?
Get a personalised comparison using your postcode and usage. You’ll see current rates and key terms so you can decide with confidence.
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