British Gas PeakSave Super Sunday tariff explained

A practical, UK-focused guide to what “PeakSave Super Sunday” means, how these events usually work, and what to check before you rely on them. We can’t show live British Gas rates here — use a whole-of-market quote to see your real options for your postcode and meter.

  • Understand the concept: discounted electricity periods on selected Sundays (terms can change)
  • Check eligibility basics: meter type, smart meter requirements, and how “events” are communicated
  • See two realistic usage scenarios (with transparent assumptions) to estimate possible impact
Get your energy quote How PeakSave events work

EnergyPlus is whole-of-market. Availability and discounts can change and may depend on your meter and where you live. Always check your tariff T&Cs and event notifications from your supplier.

Fast answer: British Gas PeakSave Super Sunday tariff explained

British Gas PeakSave Super Sunday tariff explained: it generally refers to discounted electricity during selected Sunday periods (an “event”), where you can lower costs by shifting energy-heavy tasks into the discounted window. The most important point is that the discount is event-based—dates, hours and eligibility can change, so you must rely on your supplier’s notifications and tariff terms.

What it is

A supplier-run offer that rewards you for using electricity at certain times (often communicated as special “events”).

What to check first

Meter and billing setup, how you’ll be notified, and whether the “discounted” rate applies automatically or needs opt-in.

Big caveat

If you can’t consistently shift meaningful kWh into events, a simpler tariff may suit you better.

Important: We don’t publish live British Gas pricing, event hours, or eligibility rules on this page because they can change. Use the quote journey for live availability and read your tariff documents and event messages from your supplier.

How PeakSave “Super Sunday” style events typically work

PeakSave-type offers are designed to change when you use electricity. Instead of promising a permanently cheaper unit rate, the supplier offers a cheaper rate (or another benefit) during specific, time-limited periods. Your goal is to move flexible usage (laundry, dishwashing, batch cooking, EV charging, immersion heater usage where safe) into that window.

A simple timeline

  1. Event announced: you’re notified of a discounted window on a Sunday (channels vary by supplier and account settings).
  2. You shift what you can: schedule appliances or change routines during the window.
  3. Usage is measured: usually via your meter readings (often easiest with a smart meter, but rules differ).
  4. Discount applied: you should see it reflected in your bill or statement according to the supplier’s terms.
Reality check: “Sunday discount” does not automatically mean your whole bill is cheaper. Most households only shift a portion of total kWh into events, so it’s best thought of as a targeted discount, not a guarantee.

Get a whole-of-market view (postcode-based)

If you’re deciding whether a PeakSave-style offer is worth it, compare it against standard variable and fixed deals available for your postcode, payment method, and meter type.

We’ll use your details to show options available to you. No on-page claims about British Gas event hours or prices.

Eligibility checks to make before you rely on PeakSave events

1) Your meter setup

  • Smart meter: many time-based offers work best with half-hourly readings, but requirements vary.
  • Traditional meter: you may not be able to evidence time-window usage in the same way.
  • Prepayment: some offers may be structured differently; check your specific account eligibility.

2) How you’ll be notified

  • Do you receive emails/app notifications reliably?
  • Are notifications turned on in your account settings?
  • Is there an opt-in step for each event (or is it automatic)?
Tip: If your household can’t shift usage (for example, medical equipment, electric heating that must run continuously, or caring responsibilities), prioritise a tariff with predictable costs rather than relying on event-based discounts.

Estimate the impact: two realistic scenarios (with transparent assumptions)

Because event details and rates can change, the safest way to think about PeakSave Super Sunday is: “How many kWh could I realistically move into discounted periods?” Then multiply by an estimated discount per kWh from your own tariff documents (or your bill once an event is applied).

Assumptions used below (you should swap in your own): Example Sunday discounted window = 4 hours; example “shiftable” usage = appliances/EV charging that can be scheduled; standing charges are ignored because events usually affect unit costs only. Discount per kWh is shown as 10p purely as a worked example — do not treat it as a British Gas claim.

Scenario A: Flat with electric cooking + laundry

Shiftable usage during event
2 loads of laundry (tumble dryer optional), dishwasher, batch cooking: ~4 kWh total shifted
Worked example saving
4 kWh × 10p/kWh estimated discount = 40p per event
What could make it higher/lower
Higher if you can shift more kWh (e.g. more drying, immersion heater where appropriate). Lower if you were going to run those appliances anyway outside the event, or if you forget and run them at normal rates.

Scenario B: Household with an EV (scheduled charging)

Shiftable usage during event
EV charging at ~7 kW for 4 hours = ~28 kWh shifted (if your setup supports it)
Worked example saving
28 kWh × 10p/kWh estimated discount = £2.80 per event
What could make it higher/lower
Higher with longer windows or more charge needed; lower if you can’t charge at full power, you already use a cheap off-peak EV tariff, or the event clashes with when you need the car.

A quick self-check before you switch for events

Ask: “How many kWh can I reliably shift on a Sunday?” If the honest answer is under ~3–5 kWh, the overall bill impact may be modest unless events are frequent and the discount is large.

Then: compare the rest of the tariff (unit rates outside events, standing charge, contract length, exit fees if any) against alternatives in the market.

Compare PeakSave Super Sunday against other common tariff types

This table is about structure (how you’re charged), not specific prices. Your best option depends on your usage pattern, meter type and what’s available for your postcode.

Option What you’re optimising for Best for Watch-outs
PeakSave-style Sunday events Shifting kWh into discounted windows People who can plan usage and have flexible loads Event dates/hours can vary; discount may be limited to certain usage; outside-event rates still matter
Standard variable tariff (SVT) Simplicity and flexibility Anyone who doesn’t want to commit or optimise usage timing Rates can change; may not be the cheapest option
Fixed tariff Predictability of unit rates over a term Budgeting-focused households May include exit fees; you can miss out if prices fall
Time-of-use tariffs (general) Cheaper off-peak times more regularly Smart meter households with EVs, batteries, or shiftable usage Peak rates can be higher; you must manage timings consistently
How to use the table: if you’re only attracted by the Sunday discount, first compare the rest of the week’s rates and any contract terms. A good event doesn’t always beat a better overall tariff.

Decision checklist: who it suits (and who it doesn’t)

Likely to suit you if…

  • You can move meaningful usage into a Sunday window (ideally several kWh).
  • You’re happy to plan/schedule appliances or charging.
  • You’ll actually see and act on event notifications.

May not suit you if…

  • Your usage is mostly fixed (little you can shift without inconvenience).
  • You need predictable day-to-day pricing more than occasional discounts.
  • You’re comparing on headline “discount” without checking the rest of the tariff.

Next best step

Get a quote for your postcode and compare like-for-like (meter type, payment method, and contract terms). You’ll see what’s actually available now.

Compare tariffs now

Costs, exclusions and common pitfalls (UK-specific)

Event-based discounts can be useful, but most complaints we see come from expectations vs reality. Use these checks before you switch or change how you use energy.

1) Outside-event rates still dominate

If you only shift a small amount of kWh, the normal unit rate and standing charge can matter far more than occasional discounts.

2) “Eligibility” can be account-specific

Some offers depend on meter data, billing setup, or opt-in settings. Always read your own account messages and tariff documentation.

3) Don’t create unsafe routines

Only run appliances when safe and appropriate. Avoid running tumble dryers or high-load appliances unattended just to chase a discount.

Other things to check in the small print

  • Contract length and whether you can leave without a fee.
  • Exit fees (common on fixes; sometimes none — but don’t assume).
  • How the discount is applied (bill credit vs reduced unit rate vs a separate line item).
  • Event limits (for example, how often events happen and whether there are caps). Terms vary.

If you rent (tenants)

You can usually choose your energy supplier if you pay the bills directly, but check your tenancy agreement and whether there are communal or landlord-supplied arrangements.

For independent guidance, see Citizens Advice on switching supplier and dealing with billing issues.

Compare live tariffs (form)

Want to see whether an event-based offer stacks up against fixed and standard variable options available right now? Submit your details and we’ll show available tariffs for your postcode and meter type.

Privacy note: Only share details you’re comfortable providing. You can also use the quote journey directly: get an energy quote.

We’ll send your results and any follow-up questions here.

Optional, but helps if we need to confirm meter details.

Used to show accurate availability and regional charges.

By submitting, you confirm you’re seeking home energy options (not business).

What you’ll need (2 minutes)

  • Your postcode
  • Rough idea of your usage (or last bill if handy)
  • Whether you have a smart meter (if you know)
If you’re comparing a Sunday-event offer: write down what you can actually move (kWh). That’s the number that decides whether the discount changes your bill meaningfully.

FAQs

Is British Gas PeakSave Super Sunday a separate tariff, or an add-on event?

It’s usually described as an event-based discount concept rather than a simple “one-rate” tariff. The exact setup can vary over time and by account, so check your British Gas tariff documents and any event emails/app messages to see how it applies to you.

Do I need a smart meter for PeakSave Super Sunday?

Often, time-based discounts are easiest with a smart meter because it can record when you used electricity. However, requirements vary. The safest approach is to check your eligibility in your account information and the specific terms for the offer you’re on.

How will I know when a “Super Sunday” event is happening?

Suppliers typically notify customers via email, app notifications, text, or online account messages. Because notifications can be missed, make sure your contact details are up to date and that you have marketing/service messages enabled where required.

What appliances make the biggest difference during a discounted Sunday window?

The biggest impact usually comes from high-kWh, flexible loads: EV charging, tumble drying, electric showers used differently (where practical), immersion heaters (only if your system is suitable), and running multiple cooking/laundry cycles. Always prioritise safety and manufacturer guidance.

Could PeakSave events cost me more overall?

They can if you increase total usage (for example, running extra cycles you wouldn’t otherwise run) or if the tariff’s normal rates are higher than alternatives. That’s why it’s important to compare the whole tariff (unit rates, standing charge, and any exit fees) — not just the event discount.

If I’m on prepayment, can I still benefit from Super Sunday discounts?

Possibly, but it depends on your meter type and how the supplier applies discounts or credits. Prepayment setups vary (including smart prepay). Check your account eligibility and how any credit would be applied to your balance.

What should I check before switching to an event-based offer?

Check: (1) whether you can shift meaningful kWh into the event window, (2) whether you’ll reliably receive notifications, (3) the unit rates outside events, (4) standing charges, (5) contract length and any exit fees, and (6) whether your meter supports the required readings.

Where can I get independent help if I think my discount hasn’t been applied?

Start by checking your tariff terms and bill breakdown, then contact your supplier. For independent guidance on complaints and billing problems, use Citizens Advice, and you can also review Ofgem’s consumer information on your rights and switching.

Trust, methodology and sources

Editorial

Written by
EnergyPlus Editorial Team
Reviewed by
Energy Specialist
Last updated
August 2026

How we assess PeakSave-style offers (our methodology)

  • Structure-first: we explain how event-based pricing works without claiming live rates or guaranteed savings.
  • User-fit: we focus on whether you can shift kWh and how often you’ll benefit.
  • Like-for-like comparison: we recommend comparing against fixed and standard variable options for your postcode, meter and payment method.
  • Transparent scenarios: our examples use clearly stated assumptions and are not supplier claims.

Limitations (important)

  • We don’t have live British Gas event hours, eligibility rules or rates on this page.
  • Availability changes; always check your own documents and notifications.
  • Household usage varies; your outcomes depend on kWh shifted and your tariff terms.

Sources (UK)

Ready to check whether PeakSave-style events are worth it for you?

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Updated on 28 Aug 2026