Best 12 month fixed energy deals UK this week
Compare whole-of-market 12-month fixed tariff options for your home in minutes. Tell us your postcode and usage preferences, and we’ll help you find a deal with a fixed unit rate for 12 months (subject to supplier terms).
- Whole-of-market comparison for UK domestic energy
- See 12-month fixed tariffs alongside variable options
- Switch support: we’ll guide you from quote to application
Home energy only. Prices and availability change frequently and can vary by region, meter type and payment method. Fixed means unit rates are set for the term; your bill still depends on usage.
Compare the best 12-month fixed energy deals for your postcode
“Best” depends on your region, meter type (credit / smart / prepayment), and how much energy your home uses. EnergyPlus searches across UK domestic tariffs so you can quickly shortlist competitive 12-month fixed options available this week in your area.
If you’re coming off a fixed deal, a 12-month fix can help you plan household costs because the unit rates and standing charges are set for the term. Just remember: your bill still goes up or down with usage.
Switching tip: always check whether your current tariff has an exit fee and when it applies. Some suppliers waive exit fees in the final 49 days of a fixed term (rules/terms apply).
What you’ll need (takes ~2 minutes)
- Your postcode (to match regional pricing)
- Your preferred contact details (so we can send your results)
- Optional: your rough monthly spend or kWh usage (for more accurate comparisons)
Whole-of-market approach: we aim to compare a broad range of UK domestic tariffs. Availability can vary and not every supplier/tariff is accessible in every region or for every meter type.
Why many households choose a 12-month fixed tariff
A 12-month fix can strike a balance between price certainty and flexibility. Here’s what most people like about them (and what to watch for).
Predictable unit rates
Your unit rates and standing charges are set for 12 months (supplier terms apply), which can help with budgeting compared with variable tariffs.
Less admin for a year
Once you switch, you typically won’t need to re-shop for a while—just keep an eye on renewal dates and your direct debit.
Protection from short-term rises
If market prices rise during your term, your unit rate stays the same. If prices fall, you may miss out unless you can switch without hefty exit fees.
Clearer comparisons
Fixed tariffs can be easier to compare because the core prices don’t change monthly—useful when you’re weighing up like-for-like options.
Potentially lower than your SVT
Some 12-month fixes can undercut a supplier’s standard variable tariff (SVT). The only way to know is to compare for your exact region and meter.
Watch exit fees
Many fixed deals include exit fees if you leave early. We help you spot these so you can decide if the saving is worth it.
What “12-month fixed” means (and what it doesn’t)
Typically fixed for 12 months
- Unit rates are fixed for the tariff term
- Standing charges are fixed for the tariff term
- Your monthly direct debit can still be reviewed (it’s a payment amount, not the tariff price)
- Your final cost still depends on how much energy you use
Not always “the cheapest” for everyone
- Prices vary by region and meter type
- Some tariffs bundle features (e.g., green electricity) that can affect price
- Some include exit fees that reduce flexibility
- Introductory discounts and add-ons can change real value
Key tariff terms to compare this week
| What to check | Why it matters | Quick tip |
|---|---|---|
| Unit rate (p/kWh) | Main driver of cost for most homes; impacts every kWh you use. | Compare on the same meter type (credit vs prepayment can differ). |
| Standing charge (p/day) | You pay it regardless of usage; can dominate costs in low-use homes. | If you’re out a lot, don’t ignore this line item. |
| Exit fees | Limits your ability to move if prices drop or you move home. | Check if fees apply per fuel (electric + gas) and when they’re waived. |
| Payment method | Direct debit, pay on receipt, and prepay can have different pricing. | Pick the method you’ll actually use; otherwise savings can be overstated. |
| Tariff end date | A 12-month fix usually rolls to a default tariff at the end if you do nothing. | Set a reminder 6–8 weeks before the end to compare again. |
How to pick the best 12-month fixed deal for your home
Use this practical checklist to avoid “looks cheap, costs more” tariffs. If you use our form, we’ll help you review these points in your results.
- Start with your current tariff. If you have your latest bill, note your unit rates, standing charges and tariff end date.
- Compare on the right basis. Make sure the quote matches your region, payment method and meter type (smart, standard credit, or prepayment).
- Check the fixed term and exit fees. A strong price is less helpful if you’ll likely need to leave early (moving home, planned renovation, etc.).
- Look at standing charge vs unit rate trade-offs. Low unit rates with high standing charges can suit high-use homes but cost more in low-use homes.
- Confirm what’s included. Any add-ons, bundles, or green electricity promises should be clear in the tariff details.
- Switch at the right time. If you’re in the final weeks of a fixed term, you may be able to switch without an exit fee (check your supplier’s terms).
Don’t judge by monthly direct debit alone. Suppliers can adjust direct debits based on usage and account balance. Focus on unit rates + standing charges, then estimate annual cost using realistic usage.
Regional and meter-type considerations (UK homes)
Your region affects prices
Standing charges and unit rates can differ across England, Scotland and Wales due to regional distribution costs. That’s why postcode is essential for accurate comparisons.
Prepayment vs credit meters
Prepayment tariffs can be priced differently and may have fewer fixed options. If you’re considering changing meter type, compare both scenarios before switching.
Smart & multi-rate tariffs
If you have (or can get) a smart meter, you may be eligible for tariffs designed around usage patterns. Always check whether a 12-month “fixed” is single-rate or has time-of-use rates.
Common mistakes when searching “best fixed deals”
- Comparing headline savings without checking tariff basis (wrong meter type, payment method, or region).
- Ignoring standing charges, especially if your home uses less energy.
- Missing exit fees and then being stuck when better deals appear.
- Not checking contract end date and rolling onto a default tariff by accident.
- Assuming fixed means your bill can’t change—usage and direct debit adjustments still affect payments.
FAQs: 12-month fixed energy deals in the UK
Are 12-month fixed deals cheaper than variable?
Sometimes. A fixed tariff can be cheaper than an SVT for certain regions and meter types, but not always. The “best” option depends on your exact pricing and usage—compare for your postcode to check what’s available this week.
Will my direct debit stay the same on a fixed tariff?
Not necessarily. Fixing the tariff means unit rates/standing charges are set for the term, but suppliers can adjust your monthly direct debit based on your usage and account balance.
Can I leave a 12-month fixed deal early?
Often yes, but you may pay an exit fee (sometimes per fuel). If you think you may move home or want flexibility, prioritise tariffs with low/no exit fees where possible.
Do I need a smart meter to get a good fixed deal?
No. Many competitive fixed tariffs are available for standard credit meters. A smart meter can expand the range of tariffs you can choose from, but it’s not required for most 12-month fixes.
Is it better to fix for 12 months or longer?
A 12-month fix can offer a good balance: it locks prices for a meaningful period without committing for multiple years. If you want flexibility, 12 months is often a sensible middle ground—subject to exit fees.
How quickly can I switch?
Switching times vary by supplier and circumstances, but many switches complete within a few working days. You’ll usually continue supply as normal—no interruption—while the supplier change is processed.
Why people use EnergyPlus to compare fixed deals
When you’re searching for the best 12-month fixed energy deals in the UK, it’s easy to lose time jumping between supplier sites. Our aim is to make comparison clearer and help you act confidently.
“I didn’t realise my standing charge was the real issue. The comparison helped me choose a fixed deal that made sense for my low usage.”
“Straightforward process. I entered my postcode and got options that actually matched my meter type.”
“Helpful reminders about exit fees and the end date. It saved me from picking a deal that looked cheap but wasn’t flexible.”
Trust note: We focus on clear, comparable tariff details (unit rate, standing charge, term and exit fees) so you can decide what’s best for your household.
Ready to see this week’s best 12-month fixed deals for your area?
Compare whole-of-market domestic tariffs for your postcode and get help choosing a fixed option with the right balance of price and flexibility.
No disruption to your supply when switching. Terms, eligibility and availability vary by supplier and meter type.
Quick checklist before you submit
- Use your current home postcode
- Enter the email you want results sent to
- If you have it, keep a recent bill nearby
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