Cheapest variable rate energy tariff in the UK (right now)
Find the lowest estimated variable tariff available to you today — based on your postcode, meter type and payment method. No guesswork, just whole-of-market comparison with clear caveats.
- Variable tariffs change: we show what’s cheapest for your details, not a generic headline rate.
- See whether the Ofgem price cap tariff or a supplier’s own variable deal is currently best for you.
- Get a quote without committing — switching is only started if you choose a tariff.
Estimates only. Availability and rates vary by region, meter type, payment method and eligibility. We’ll show personalised results before you switch.
Fast answer: what’s the cheapest variable rate tariff in the UK now?
There isn’t one single “cheapest variable tariff” for everyone in the UK. Variable prices differ by:
Where you live
Regional electricity network charges mean unit rates and standing charges vary by postcode.
How you pay
Direct Debit typically differs from standard credit or prepayment (PAYG).
Your meter setup
Single-rate vs Economy 7, smart meter tariffs, and some restricted meters change what you can access.
In practice: the cheapest variable deal for many households is often the supplier’s standard variable tariff (SVT) priced at (or close to) the Ofgem price cap — but some suppliers also offer discounted variable tariffs in certain regions or to certain customer groups. The only reliable way to identify the cheapest is to compare using your postcode and usage.
Key takeaways (UK-specific)
- “Cheapest” should be based on your estimated annual cost (unit rate + standing charge), not unit rate alone.
- Variable tariffs can rise or fall; fixed deals trade flexibility for price certainty.
- If you have prepayment or certain restricted meters, your options can be narrower.
- Check exit fees, discount conditions, and whether the tariff is dual fuel only.
Compare variable tariffs for your home
Tell us a few details and we’ll show the lowest estimated variable tariffs available for your postcode, alongside fixed deals so you can sanity-check value. You’re in control: no switch is started unless you choose a tariff.
Tip: Have a recent bill handy. If you don’t know your kWh usage, we can still estimate using typical household profiles — you’ll see assumptions before results.
What you’ll see in your results
- Estimated annual cost (electricity only, gas only, or dual fuel)
- Unit rates and standing charges (with region and payment method applied)
- Tariff type (SVT, discounted variable, tracker/other variable where available)
- Key terms: exit fees, minimum term (if any), and eligibility notes
Get your quote
What “cheapest variable tariff” means (and what it doesn’t)
We mean
- Lowest estimated annual cost for a variable tariff you can actually sign up to
- Using your postcode, meter type and payment method
- Including standing charges and unit rates (electricity and/or gas)
We don’t mean
- A single national tariff that’s cheapest for everyone
- A guarantee your bill will go down (usage and future price changes matter)
- A unit-rate-only claim that ignores standing charges
Compare variable tariff types (UK homes)
“Variable” can mean a few different things in the UK. This table helps you decide what you’re comparing — and what risks to expect.
| Variable tariff type | How the price changes | Who it can suit | Watch-outs |
|---|---|---|---|
| Standard Variable Tariff (SVT) | Typically follows the Ofgem price cap level (cap changes periodically). Supplier can change prices with notice. | People wanting flexibility, no fixed end date, and a familiar default tariff. | Not always cheapest; standing charges can be high in some regions; prices can rise. |
| Discounted variable | Variable, but with a discount vs the supplier’s SVT (e.g. for a period or with conditions). | If you want variable flexibility but hope to beat SVT pricing. | Discounts may be conditional (paperless billing, DD); may end; check if dual fuel only. |
| Tracker / formula-based variable | Price can move more frequently, based on a reference (e.g. wholesale index) plus margin. | Risk-tolerant households who can handle price movement and want transparency. | Bills can rise quickly; may have eligibility rules; not ideal if budgeting is tight. |
Decision checklist: is a variable tariff right for you?
Often suits you if…
- You may move home soon and want flexibility
- You’d rather avoid exit fees
- You’re happy to keep an eye on rates and switch again if needed
- You’re on (or near) the price cap and fixed deals look uncompetitive in your region
Consider fixed instead if…
- You need predictable monthly Direct Debit for budgeting
- A fixed deal is only slightly higher today but protects you from future increases
- You’d struggle if prices rose before the next cap change
- You want fewer decisions over the next 12–24 months
Quick reality check: the “cheapest” tariff can differ depending on whether you use more energy than average. Standing charges matter more for low users; unit rates matter more for high users.
Two realistic scenarios (with numbers)
These examples show how we judge cost. They are illustrative only — your rates depend on region, meter type and payment method. We use a simple annual-cost model:
Estimated annual cost = (electricity unit rate × electricity kWh) + (electricity standing charge × 365) + (gas unit rate × gas kWh) + (gas standing charge × 365)
Scenario A: Low-use flat (electricity only)
- Usage assumption
- 1,800 kWh/year (single-rate)
- Tariff 1 (SVT example)
- 27.0p/kWh + 60p/day
- Estimated annual cost
- £705 (≈ £486 units + £219 standing)
Why it matters: standing charge is a large share for low users. A slightly lower standing charge can beat a lower unit rate.
Scenario B: Family home (dual fuel)
- Usage assumption
- 3,100 kWh elec + 12,000 kWh gas/year
- Tariff 1 (SVT example)
- 27.0p/kWh + 60p/day; Gas 7.0p/kWh + 32p/day
- Estimated annual cost
- £1,749 (≈ £837 elec + £912 gas)
Why it matters: for higher use, unit rates drive most of the cost. A small p/kWh change can outweigh modest standing-charge differences.
Important: The Ofgem price cap is a cap on unit rates and standing charges for SVTs in each region (not a cap on your total bill). Your bill still depends on how much energy you use.
Costs, exclusions and common pitfalls (so you don’t get caught out)
Standing charge surprises
A tariff with a low unit rate can still cost more overall if the standing charge is higher. This is especially common for low-use homes.
Payment method differences
Direct Debit, standard credit and prepay can price differently. Always compare using the method you’ll actually use.
Meter type restrictions
Economy 7 / multi-rate meters, smart requirements, and restricted meters can limit which tariffs you can take.
Discounts that expire
Some “cheap variable” offers are discounted for a limited time or require paperless billing / Direct Debit. Note the end date and what happens after.
Dual fuel assumptions
Some deals look cheap only when you take both gas and electricity. If you’re electric-only, compare on that basis.
Variable means variable
Your supplier can change prices (with notice). If your budget is tight, consider whether a fix is safer even if slightly higher today.
Before you choose any “cheap” variable tariff, check these five items
- Meter type: single-rate, Economy 7, smart, prepay, restricted.
- Payment method: Direct Debit vs standard credit vs prepayment.
- Total estimated annual cost: not just p/kWh.
- Key terms: exit fees, discount end date, and any eligibility (e.g. online-only).
- Service factors: billing preference, support, and whether you’ll need a meter exchange.
FAQs: cheapest variable rate energy tariffs (UK)
Is the Ofgem price cap the cheapest variable tariff?
Not always. The cap limits SVT and default tariff rates, but some suppliers may offer discounted variable deals in certain regions or with conditions. The cap also isn’t a cap on your total bill — your usage still drives cost.
Why does “cheapest” change when I enter my postcode?
Because standing charges and unit rates vary by region (network costs differ). The same supplier can have different pricing across the UK.
Can tenants switch to a cheaper variable tariff?
Usually, yes — if you pay the energy bills and your name is on the account. You typically don’t need the landlord’s permission to change supplier, but you should avoid changing the meter type without approval.
Do variable tariffs have exit fees?
Many standard variable tariffs have no exit fee, but you should always check the tariff details. Some special variable offers can include fees or conditions.
I’m on a prepayment meter — can I still get the cheapest variable rate?
You can still compare, but options may be different. Some tariffs are Direct Debit-only. If you’re considering switching from prepay to credit, eligibility and credit checks may apply, and you may need your supplier’s agreement.
What if I have Economy 7 (two-rate) electricity?
Compare using an Economy 7 profile. A tariff can look cheap on the day rate but be expensive overall if the night rate is high (or if your night usage is low). We’ll help you compare like-for-like where possible.
How quickly can I switch to a new tariff?
Switching times vary by supplier and circumstances, but many switches complete within a few working days. If there are meter issues, debt on a prepay meter, or data problems, it can take longer.
Should I choose the cheapest variable tariff or a fixed deal?
It depends on your risk tolerance and budgeting needs. Variable can be cheapest today but may rise. Fixed can protect you from increases but may cost more now and can include exit fees. Comparing both side-by-side is usually the safest approach.
Trust, methodology and sources
Page governance
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- April 2026
How we assess “cheapest variable”
- Core metric: estimated annual cost, combining unit rates and standing charges.
- Personalisation: postcode-based region, payment method, and meter type where provided.
- Like-for-like: we compare variable tariffs against other variable tariffs; we also show fixed options for context.
- Practical filters: eligibility and availability notes (e.g. Direct Debit-only) where supplied by providers.
Limitations (what you should know)
- All costs are estimates. Your actual bills depend on real usage, meter reads, and future price changes.
- Some tariffs are only available to certain customer groups or regions, and availability can change quickly.
- If your meter details are unusual (restricted meters), a supplier may require extra checks before confirming a tariff.
Independent UK sources we rely on
Ready to find the cheapest variable tariff for your postcode?
Get a personalised comparison in minutes. We’ll show variable options first, with clear terms and estimated annual costs.
You can compare without committing to a switch. If you proceed, your new supplier will confirm your tariff details before supply starts.
Back to EV Charger