Cheapest tariff for electric underfloor heating in the UK
Find the tariff type that typically works out cheapest for electric underfloor heating (EUFH) based on your meter, how you heat, and when you use power — plus a quick quote form to compare whole-of-market options.
- Most homes do best on a competitive single-rate tariff unless a large share of heating runs overnight
- If you have storage-style controls or a compatible setup, a time-of-use tariff can reduce costs — but only with the right usage pattern
- We explain the meter and wiring checks that matter before you switch
Estimates only. Your cheapest option depends on your region, meter type, payment method and when you run heating. Always check tariff terms, unit rates and standing charges.
Fast answer: what’s usually the cheapest tariff for electric underfloor heating?
For most UK homes with electric underfloor heating, the cheapest option is usually a competitive single-rate (flat) electricity tariff on a standard smart meter — unless a large share of your heating can reliably run in cheaper off‑peak hours.
Why the “unless” matters: Electric underfloor heating often runs at the times electricity is most expensive (mornings/evenings). Time‑of‑use tariffs can help only if your heating schedule and home insulation let you shift enough usage off‑peak without making the home uncomfortable.
Key takeaways (UK-specific)
Single-rate: best default
If you can’t shift much heating away from peak times, focus on low unit rate and low standing charge in your region.
Time-of-use: only if it fits
Works best when your EUFH is used like a thermal store (pre-heat off‑peak; coast through peak), and you can control it precisely.
Meter/setup can limit choice
Some meters (e.g. legacy Economy 7 / related setups) or separate heating circuits can affect which tariffs you can move to without changes.
Before you compare: 3 things to check
- 1) Your meter type
- Standard (single register), Economy 7/two‑rate, smart meter with half‑hourly readings (needed for most time‑of‑use tariffs), or a complex/related meter. If you’re unsure, your bill often shows “Day/Night” rates or two MPAN-related lines.
- 2) How your EUFH is controlled
- Programmable thermostats per room, floor sensors, and the ability to pre‑heat are key if you want to benefit from off‑peak rates.
- 3) Your payment method
- Direct Debit tariffs often price differently from prepayment. If you’re on a prepayment meter, your “cheapest” may be restricted, but switching can still reduce costs.
Compare the cheapest options for your underfloor heating
Unit rates and standing charges vary by region and tariff. Tell us your postcode and a few details and we’ll match you to suitable tariffs across the market (where available), including fixed and variable options.
Tip for electric underfloor heating: If your heating runs mostly mornings/evenings, prioritise low peak unit rates. If you can pre‑heat overnight, we’ll also check time‑of‑use suitability.
How to choose the “cheapest” tariff type (without getting caught out)
- Start with your meter: if you have (or can get) a smart meter sending half-hourly readings, you have the widest access to time-of-use tariffs.
- Estimate when the heating runs: for EUFH, the “shape” of use matters more than total kWh. Note your typical on-times (weekday mornings, evenings, weekends).
- Compare total annual cost: don’t pick on unit rate alone. Standing charge can outweigh a small unit-rate difference, especially in smaller homes.
- Check for restrictions: exit fees, price change clauses (variable), and whether a tariff requires a smart meter or certain payment type.
- Sanity-check comfort: if off-peak pre-heating makes rooms too hot overnight or too cold in the evening, savings can disappear quickly.
Get a tailored quote
We’ll use your postcode to show available tariffs and help you identify the best fit for electric underfloor heating.
Tariff types for electric underfloor heating: what tends to be cheapest?
There isn’t one universally cheapest tariff in the UK. The best option depends on when your EUFH runs, your meter, and how much you pay in standing charge. Use this table to narrow the right “type”, then compare actual deals for your postcode.
| Tariff type | When it can be cheapest for EUFH | Main risks / watch-outs | Meter & eligibility notes |
|---|---|---|---|
| Single-rate (flat) | If heating runs mostly mornings/evenings and you can’t shift it; also good where standing charge differences dominate. | Not optimised for off‑peak use; you may pay more if you could genuinely shift load. | Works with standard and smart meters; widest choice of suppliers. |
| Fixed (single-rate) | When you want price certainty through winter and the fixed unit rate + standing charge are competitive for your region. | Exit fees may apply. If market prices fall, you could be locked in higher. | Check term length, exit fee, and whether it’s “fixed unit rate” or “fixed discount”. |
| Variable (single-rate) | If you need flexibility and your usage pattern doesn’t suit off‑peak shifting. | Supplier can change prices (with notice). Budgeting is harder for high electricity users like EUFH homes. | Check notice periods and whether it tracks the price cap or is a supplier’s own variable tariff. |
| Economy 7 / two-rate | If you can run a large share of heating (and other loads) overnight, and daytime rates aren’t punitive. | Day rate can be higher than single-rate. If EUFH runs at peak times, overall cost can rise. | Your off‑peak window varies by region/meter. Make sure your heating circuit actually uses the off‑peak rate. |
| Time-of-use (smart meter) | If you can pre‑heat well outside peak and reduce peak-time heating. Best in well‑insulated homes with responsive controls. | Peak rates can be much higher. If you don’t change behaviour, it can cost more. | Usually requires a smart meter with half-hourly readings and opt‑in data settings. |
Decision checklist: who each approach suits
A competitive single-rate tariff suits you if…
- You heat mainly before work and after work.
- Your EUFH is used for comfort in key rooms (bathroom/kitchen) rather than as whole-home heating.
- You can’t (or don’t want to) change routines to chase off‑peak windows.
- You prefer simpler bills and predictable costs.
A time-of-use / two-rate tariff may suit you if…
- Your home holds heat well (good insulation, not too draughty).
- You can pre‑heat overnight and reduce peak-time heating.
- You already shift other usage off‑peak (EV charging, dishwasher, washing machine).
- You’re happy to monitor and tweak schedules for a few weeks.
Important: If your EUFH is on a separate heating meter/circuit (common in some all‑electric flats), switching tariffs can be more complex. Check your bill for multiple readings/meters and ask your supplier what tariff types your setup supports.
Costs, exclusions and common pitfalls (electric underfloor heating)
Electric underfloor heating is straightforward to run but can be expensive if it becomes your main heat source. These are the biggest “gotchas” we see when people try to find the cheapest tariff.
Pitfall 1: picking by unit rate only
Standing charge differs by region and can outweigh a slightly cheaper unit rate. Always compare the estimated annual cost using your usage.
Pitfall 2: assuming “night rate” helps
If your EUFH runs during peak hours, a two‑rate tariff can cost more because the day rate is often higher than single-rate tariffs.
Pitfall 3: incompatible setup
Some properties have complex metering or wiring (e.g. legacy related meters). These may need supplier support or changes before switching.
Two realistic scenarios (with numbers)
Scenario A: EUFH mainly evenings (single-rate often wins)
Home: 2-bed flat, electric underfloor heating in living area + bathroom. Use: 3,200 kWh/year electricity total, with EUFH running mostly 6pm–10pm in winter.
| Assumption | Single-rate example | Two-rate example |
|---|---|---|
| Unit rate(s) | 24p/kWh (flat) | 30p day / 12p night |
| Standing charge | 55p/day | 55p/day |
| Off-peak share | Not applicable | 25% at night |
| Estimated annual cost | ~£1,082 (3,200×£0.24) + (365×£0.55) |
~£1,194 (2,400×£0.30) + (800×£0.12) + (365×£0.55) |
These are illustrative rates to show the maths. Your actual rates depend on region and supplier. If most heat is used in the evening, a higher day rate can cancel out night savings.
Scenario B: pre-heating off-peak (two-rate can win)
Home: well-insulated 3-bed house. EUFH used heavily, programmed to pre‑heat overnight with limited top‑ups at peak. Use: 7,000 kWh/year total.
| Assumption | Single-rate example | Two-rate example |
|---|---|---|
| Unit rate(s) | 24p/kWh (flat) | 30p day / 12p night |
| Standing charge | 55p/day | 55p/day |
| Off-peak share | Not applicable | 65% at night |
| Estimated annual cost | ~£1,882 (7,000×£0.24) + (365×£0.55) |
~£1,520 (2,450×£0.30) + (4,550×£0.12) + (365×£0.55) |
In this example, shifting most kWh to night makes the two‑rate tariff cheaper. The risk is that if your heating can’t stay off during peak, the “day” rate can quickly erase the benefit.
Other exclusions and “fine print” to check
Exit fees & contract length
Many fixed deals charge exit fees if you leave early. If you’re renting or planning a move, a no-exit-fee option may be better even if slightly higher.
Payment method and eligibility
Some tariffs are Direct Debit-only. Prepayment pricing and switching rules differ, and availability can be narrower.
Standing charge changes
Even on fixed deals, check whether the standing charge is fixed or can change (terms vary). Always read the tariff information label.
Heating design matters (not just tariff)
If the floor insulation is poor or thermostats are badly set, any tariff can feel expensive. Small controls changes can reduce kWh without switching.
Comfort & safety note: If you’re changing heating schedules significantly (e.g. long overnight pre‑heat), make sure you follow your underfloor system manufacturer guidance and use floor temperature limits where recommended.
FAQs: cheapest tariff for electric underfloor heating (UK)
Is Economy 7 always cheaper for electric underfloor heating?
No. Economy 7 can be cheaper only if a large share of your heating (and ideally other electricity use) happens during off‑peak hours. If your EUFH is mostly used in the evening, a higher day rate can make Economy 7 more expensive overall.
Do I need a smart meter for the cheapest tariffs?
Not always. You can still find competitive single-rate fixed tariffs without a smart meter. However, most time-of-use tariffs require a smart meter capable of sending half‑hourly readings (and you may need to opt in to half‑hourly settlement/data sharing depending on supplier terms).
Can I switch if I’m in a flat with a complex or related meter?
Often yes, but it can be more complicated. Some older all‑electric flats have complex metering arrangements. This may limit which suppliers can take you on, or require metering changes before you can move to a standard single-rate tariff. If your bill shows multiple registers or unusual tariff names, flag this when you compare.
What’s the best payment method for cheaper electricity?
Direct Debit often has the widest choice of tariffs. Prepayment customers may see fewer options, but switching can still reduce costs. Your cheapest option also depends on eligibility checks and supplier policies.
Should I heat continuously at a low temperature, or only when needed?
It depends on your insulation and how responsive your system is. EUFH can be slow to warm up in some builds, so short bursts can be inefficient. But running it continuously can also increase kWh. The best approach is usually a stable schedule with targeted pre‑heat and modest setpoints, then adjust based on comfort and cost.
Does a “cheap” tariff always mean lower bills?
Not necessarily. Bills depend on (1) unit rates, (2) standing charge, and (3) your kWh use pattern. A tariff with very cheap off‑peak rates can still be costly if your heating runs at peak times.
Are electric underfloor heating tariffs different from normal electricity tariffs?
Usually they’re the same electricity tariffs everyone can access — the difference is that EUFH makes you more sensitive to unit rates because it can use a lot of electricity. Some homes have separate circuits/meters that can affect which tariffs you can choose.
How quickly will my prices change if I move to a variable tariff?
Variable tariffs can change with supplier pricing decisions and market conditions, usually with notice (check your tariff terms). If you rely heavily on electricity for heating, many people prefer fixed deals for budgeting, but fixed deals can have exit fees.
Trust, methodology and sources
Article details
- Written by: EnergyPlus Editorial Team
- Reviewed by: Energy Specialist
- Last updated: April 2026
How we assess “cheapest tariff” for electric underfloor heating
We treat “cheapest” as the lowest estimated annual electricity cost for a typical EUFH household profile, not just the lowest unit rate. Our guidance prioritises real-world fit: meter compatibility, peak vs off‑peak use, and tariff terms.
- Inputs we consider: unit rate(s) (p/kWh), standing charge (p/day), regional pricing differences, payment method (e.g. Direct Debit vs prepayment), and expected timing of EUFH use (peak vs off‑peak).
- What we don’t do on this page: publish a single “cheapest supplier” claim, because availability and pricing change by postcode and meter type, and eligibility varies.
- Scenario maths: the example scenarios use simple annual cost calculations (kWh × rate + standing charge × 365). They are illustrative and not a quote.
- Limitations: time-of-use tariffs can have multiple rate windows and different weekend rules; Economy 7 off‑peak hours vary; some properties have complex meters that restrict tariff choice.
Sources (UK)
- Ofgem (UK energy regulator) — rules on switching, tariffs and consumer protections.
- Citizens Advice: Energy — practical guidance on bills, meters and switching.
- GOV.UK — general UK consumer and household guidance, including energy-related support where applicable.
We also refer to supplier tariff information labels and regional rate data when producing comparisons via the EnergyPlus form journey (availability varies by supplier and customer eligibility).
Ready to find the cheapest tariff for your underfloor heating?
Compare tariffs by postcode and meter type, with terms explained clearly. No misleading promises — just options that fit how you heat your home.
Note: The secondary button is a low-distraction route back to the comparison table. If you want results for your home, the fastest path is the postcode form.
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