Should I switch to a half-hourly tariff in the UK? (June 2026 guide)
Half-hourly (smart, time-of-use) tariffs price your electricity every 30 minutes. With the July 2026 (Q3) price cap set at 26.11p/kWh, the right smart tariff can beat the cap if you can shift usage to cheaper slots — but it isn’t the cheapest choice for every home. Compare whole-of-market deals and see whether switching adds up for you.
- See whether off-peak rates beat the July 2026 cap of 26.11p/kWh for your routine
- Compare fixed, variable and dynamic half-hourly tariffs side by side
- Get a personalised view based on your home, meter and usage — not averages
EnergyPlus is a whole-of-market UK comparison service for domestic energy. Prices vary by region, meter type and usage. Switching is subject to supplier eligibility and credit checks where applicable.
Quick answer: is a half-hourly tariff worth it in 2026?
A half-hourly tariff is usually worth it if you can move a meaningful share of your electricity use into cheap off-peak windows — most commonly EV drivers, heat-pump owners, and homes with a solar battery. Off-peak rates on smart tariffs in mid-2026 are often well below the July 2026 (Q3) price cap of 26.11p/kWh, with the cheapest overnight EV windows around 7p–10p/kWh, while peak rates can sit above the cap.
If most of your usage lands in the 4pm–9pm peak and you can’t shift it, a well-priced fixed single-rate tariff at or just below the cap is usually safer. You’ll need a working smart meter sending half-hourly readings either way. Run a comparison to see how the two stack up for your postcode and routine.
Check whether a half-hourly tariff could work for your home
A half-hourly tariff (also called a smart or time-of-use tariff) changes your electricity rate in 30-minute slots. If you can shift flexible loads — laundry, dishwasher, immersion heater, EV charging or battery charging — into cheaper periods, your average unit price can drop below the July 2026 cap of 26.11p/kWh.
EnergyPlus compares whole-of-market home energy deals, including suppliers offering half-hourly and agile-style pricing alongside simpler fixed tariffs. Tell us about your home and we’ll show suitable options and explain the trade-offs in plain English. You can also browse UK suppliers or read about the energy price cap.
Not sure what you’re on now? Many households sit on a standard variable tariff (SVT) capped at 26.11p/kWh for July–September 2026, or a fixed tariff with one unit rate. Half-hourly tariffs need a communicating smart meter and supplier support.
What you’ll need (about 2 minutes)
- Your postcode (to show regional unit rates and standing charges)
- Whether you have a smart meter (or want one installed)
- A rough idea of your annual electricity use — we can guide you if not
What is a half-hourly tariff?
In the UK, a half-hourly tariff prices your electricity in 30-minute blocks. Instead of one unit rate all day, the price you pay can rise and fall depending on when you use power. These tariffs rely on half-hourly meter readings, provided by a smart meter (SMETS2 or a working SMETS1).
You still pay a daily standing charge (capped at 57.19p/day for electricity under the July 2026 cap) to cover network and metering costs, plus a unit rate for each half-hour. Some tariffs are fully dynamic (prices change every 30 minutes), while others offer fixed cheap windows — for example a low overnight EV rate or a set off-peak block.
Time-of-use tariffs
Set peak and off-peak bands with fixed rates — e.g. a cheap overnight window for EV charging and flexible appliances.
Dynamic (agile) pricing
Rates change every half hour, tracking day-ahead wholesale prices. Cheapest when the grid is well supplied; pricier at peak.
Smart export options
With solar or a battery, some smart tariffs also pay variable export rates — rewarding you for exporting when demand is high.
Important: half-hourly pricing applies to electricity only. On a dual-fuel deal, your gas price stays a single unit rate (7.33p/kWh under the July 2026 cap) plus a 29.04p/day standing charge.
Market-wide Half-Hourly Settlement: why smart tariffs are growing in 2026
Behind the scenes, Ofgem’s Market-wide Half-Hourly Settlement (MHHS) programme is changing how every supplier is charged for the electricity their customers use. Instead of estimated daily profiles, suppliers are settled on actual half-hourly consumption from smart meters. This rollout is being delivered through 2026 and into 2027, region by region.
For households, MHHS doesn’t force you onto a time-of-use tariff — you can stay on a standard single-rate deal. But it gives suppliers far stronger incentives to launch smart, time-varying tariffs, because rewarding off-peak use directly lowers their own costs. The practical result in 2026 is more half-hourly tariffs, sharper off-peak rates, and better export deals for flexible homes.
What it means for you: if you have an EV, a heat pump or a home battery, the range and competitiveness of smart tariffs is the best it has been — making this a sensible moment to compare. If your routine is fixed and peak-heavy, you can simply keep a single-rate tariff at or below the cap.
Reasons to switch (and reasons not to)
Whether a half-hourly tariff is “worth it” depends on how and when you use electricity. These are the practical pros and cons to weigh up for 2026.
Potential benefits
- Off-peak rates well below the 26.11p/kWh cap — cheap overnight EV windows are often 7p–10p/kWh
- Strong fit for EV charging and schedulable heat-pump or immersion heating
- Battery and solar owners can charge cheaply and export when rates are high
- Supports a greener grid by using power when renewable generation is plentiful
Possible downsides
- Peak rates can exceed the cap on dynamic tariffs (sometimes 30p–40p+/kWh at busy times)
- Little benefit if most usage is early-evening and can’t be shifted
- Requires a smart meter sending reliable half-hourly readings
- More effort to plan around time slots, especially on agile pricing
Tip: if you’re eyeing a half-hourly tariff mainly for EV charging, still compare it against a good fixed single-rate deal near the cap. A cheap off-peak rate can be cancelled out by higher peak prices if your household runs heavy loads in the evening.
How half-hourly tariffs work (in practice)
Half-hourly pricing is simple in principle: your usage is recorded in 30-minute blocks and billed at the rate for that time. The key is how your routine lines up with the cheaper periods.
- Your smart meter sends half-hourly readings (with your consent and supplier setup).
- The supplier sets prices by time — either fixed time bands or dynamic half-hourly rates that update daily.
- You’re billed for each block you used electricity in, plus the daily standing charge (capped at 57.19p/day for July–September 2026).
- You shift flexible loads (laundry, dishwasher, EV and battery charging) into cheaper blocks to pull your average unit price below the cap.
Indicative rates: single-rate cap vs a smart tariff
Smart-tariff figures are indicative ranges for mid-2026 and vary by supplier, region and day. Cap figures are the Ofgem July–September 2026 (Q3) GB direct-debit averages.
On a legacy two-rate tariff like Economy 7 you may already get cheaper overnight electricity. A modern half-hourly tariff is more flexible and often cheaper off-peak, but compare carefully — its peak rates can be higher than your current day rate.
Who should consider switching?
Half-hourly tariffs suit households with flexible consumption. If most of your electricity use is locked into the early-evening peak, the cap-priced single-rate route is usually the safer bet.
Strong match
- EV owners who can charge overnight
- Heat-pump homes with schedulable heating/hot water
- Solar + battery setups optimising charge and export
- People at home mid-day who can run appliances off-peak
Maybe (compare carefully)
- Families with some flexible usage but busy evenings
- High overall electricity use (savings can be meaningful)
- Homes with smart appliances and timers
- Anyone happy to monitor prices and adjust habits
Often not a fit
- Most usage happens 4–9pm and can’t be shifted
- No smart meter and unable/unwilling to get one
- Households wanting maximum price predictability
- Low users who rarely run high-load appliances
A 30-second self-check
Costs, savings and risks to understand
Half-hourly tariffs look attractive because the cheapest slots sit well under the 26.11p/kWh cap. But your actual bill depends on your usage pattern — when you use electricity — not just how much. A typical medium home uses around 2,700 kWh of electricity a year, so even a few pence per kWh of shifted usage adds up.
Where savings usually come from
- Moving high-consumption tasks into off-peak blocks
- Cutting peak-time use, which is the most expensive
- Automating schedules with timers, smart plugs and app control
- For EVs and batteries: charging mainly in low-rate windows
Common risks and “gotchas”
- Peak-hour rates can rise above the cap if behaviour doesn’t change
- Standing charges vary by supplier and region
- Some tariffs need a specific smart meter type or reliable comms
- Dynamic pricing can swing day-to-day with wholesale markets
How to compare fairly (so you don’t switch and regret it)
- Start with your current annual cost from your latest bill or online account.
- Estimate what you can shift — e.g. 10–40% of usage to off-peak (higher for EV/battery homes).
- Benchmark against a good fixed tariff at or below the 26.11p/kWh cap for stability.
- Check exit fees and contract terms on both options before switching.
If you’re risk-averse, choose tariffs with set off-peak windows rather than fully dynamic pricing. You still benefit from timing your usage, but with clearer, more predictable rates. See more on cutting your energy bills.
Eligibility: can I get a half-hourly tariff?
Availability depends on your meter and the supplier. Almost all UK half-hourly domestic tariffs require a smart meter sending regular half-hourly readings — usually a SMETS2 meter, or a SMETS1 meter that has been enrolled and is communicating.
Smart meter installed
You’re likely eligible, as long as the meter communicates reliably and your supplier supports the tariff.
No smart meter yet
Most suppliers will install one free before you move onto a half-hourly tariff. Compare options and timing first.
Complex meter types
Legacy multi-rate or non-standard setups may need extra checks before switching.
If you’re unsure, start with the comparison form. We’ll flag if your meter details suggest limited availability and point you to suitable alternatives.
Common mistakes to avoid
Comparing only the cheapest rate
Focus on your average expected unit cost across the day, not the headline off-peak rate. A 7p overnight rate doesn’t help if most of your usage is at the most expensive time.
Ignoring the standing charge
Standing charges vary by region and supplier (the cap sits at 57.19p/day). If your usage is low, the standing charge can move your bill more than the unit rates.
Assuming you’ll change habits (but not doing it)
If you won’t actually shift usage, a single-rate fixed tariff near the cap is safer. Be honest about your routine before switching.
Not checking contract terms
Look for exit fees, price-change clauses (especially on dynamic products), and whether the deal is truly domestic whole-of-market comparable.
Cut your bills for good with solar
Compare free, no-obligation quotes from vetted local solar & battery installers — the perfect partner for a smart half-hourly tariff.
Half-hourly tariff FAQs (UK homes, June 2026)
Do I need a smart meter for a half-hourly tariff?
In almost all cases, yes. Half-hourly tariffs need half-hourly readings, normally from a communicating smart meter (SMETS2, or an enrolled SMETS1). Most suppliers will install one free before you switch.
Will a half-hourly tariff beat the July 2026 price cap?
It can. The July–September 2026 cap is 26.11p/kWh for electricity. Smart off-peak rates are often well below that, so if you shift enough usage your average price can drop under the cap. If your usage is mostly at peak, you may pay more.
Are half-hourly tariffs always cheaper?
No. They’re cheaper if you can use more electricity in low-cost periods. If your usage is mostly at peak times, a well-priced fixed single-rate tariff at or below the cap may cost less.
What is Market-wide Half-Hourly Settlement (MHHS)?
It’s an industry change rolling out through 2026–2027 that settles suppliers on actual half-hourly smart-meter data. It doesn’t force you onto a time-of-use tariff, but it’s why suppliers are launching more competitive smart tariffs.
What happens if prices spike on a dynamic tariff?
During peak periods your electricity can cost more than the cap for those slots. On dynamic tariffs, understand the supplier’s peak windows and any price limits, and plan to avoid heavy use at peak times.
Is a half-hourly tariff the same as Economy 7?
Not quite. Economy 7 is a traditional two-rate day/night setup. Half-hourly tariffs can have many time slots (including dynamic pricing), giving more chances to save — and more variability to manage.
Want a tailored recommendation? Use the comparison form and we’ll show suitable options for your postcode and meter type.
What households like about comparing with EnergyPlus
Realistic expectations matter with half-hourly tariffs. People value clear information and the ability to compare well beyond a single supplier.
“The comparison showed a fixed deal and a smart tariff side by side, so we could choose based on our routine.”
“Helpful guidance on whether shifting usage would actually make a difference for our EV. No hard sell.”
“Straightforward form and a clear breakdown of standing charges for our postcode.”
How we keep this accurate: our figures use the Ofgem July–September 2026 (Q3) price cap (electricity 26.11p/kWh and 57.19p/day standing charge; gas 7.33p/kWh and 29.04p/day), confirmed by Ofgem on 27 May 2026 and effective from 1 July 2026. Smart-tariff rates are indicative ranges and vary by supplier, region and day. We compare across UK suppliers (whole-of-market where available) and highlight contract length, exit fees, standing charges and whether half-hourly readings are required. Last updated June 2026.
Ready to see if a half-hourly tariff could save you money?
Compare whole-of-market home energy options for your postcode — smart half-hourly tariffs alongside simpler fixed deals at or below the July 2026 cap.
Switching normally takes place without interruption to your supply. Always review tariff terms and any exit fees before confirming a switch.
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