Fixed energy tariff deals with £100 bill credit (UK)

Compare whole-of-market fixed energy deals that can include £100 bill credit, and switch your home gas and electricity in minutes with EnergyPlus.co.uk.

  • Whole-of-market comparison for UK homes (gas, electricity or dual fuel)
  • See fixed tariffs and bill credit offers side-by-side
  • Start your switch with one simple form (no obligation)
Compare fixed deals How bill credit works

Bill credit offers vary by supplier and eligibility. We’ll show the key terms (credit amount, timing and conditions) before you switch.

Compare fixed energy deals that include £100 bill credit

A fixed energy tariff keeps your unit rates and standing charges set for the fixed term (subject to the supplier’s terms), helping you plan your household budget. Some suppliers also run bill credit offers (often advertised as “£100 bill credit”) to encourage switching—usually applied to your account after your switch completes.

EnergyPlus.co.uk is a whole-of-market comparison service for UK home energy. Use the form to start your comparison and we’ll match you with available fixed deals and clearly show whether a £100 bill credit (or similar) is included, plus key conditions such as when the credit is paid and what happens if you leave early.

What you’ll need to get accurate prices

  • Your postcode (to identify regional charges and suppliers)
  • Whether you want electricity, gas or dual fuel
  • An idea of your usage (from your bill, smart meter app, or annual estimate)
  • Your current tariff end date (if you’re on a fix)

Get your fixed deal options

Fill in a few details and we’ll help you compare fixed tariffs, including any £100 bill credit offers available for your home.

Start your comparison

By submitting, you confirm this is for a UK home energy comparison. We’ll use your details to provide quotes and contact you about your comparison. You can opt out at any time.

Prefer to research first? Jump to how £100 bill credit works and common questions so you know what to look for in the offer terms.

Important: A £100 bill credit is a one-off incentive and doesn’t always mean the tariff is cheapest overall. When comparing fixed deals, it’s best to look at estimated annual cost, exit fees, unit rates and standing charges—then factor the credit in.

Why choose a fixed tariff with bill credit?

More predictable bills

Fixed unit rates can help you avoid surprise pricing changes during the term. It’s useful if you’re budgeting for household expenses and want stability.

Upfront incentive (bill credit)

A £100 bill credit is typically applied to your energy account after switching. It can reduce what you pay over the first few bills (timing varies by supplier).

Side-by-side comparisons

EnergyPlus helps you compare fixed deals using the numbers that matter: annual estimate, tariff length, exit fees, and whether incentives apply.

Suitable for smart meters

Whether you have a smart meter or not, you can still switch. Many fixed tariffs work well with smart meter readings for accurate billing.

Avoid rolling onto a pricier rate

If your current fix ends soon, comparing now can help you avoid automatically moving to a standard variable tariff that may not suit you.

Clearer terms before you switch

We highlight key conditions such as credit timing, minimum supply period, and any exit fees—so you can switch with confidence.

Tip: If a deal offers £100 credit but has higher unit rates, you may be better off with a cheaper tariff without credit—especially for higher usage homes. Compare the total estimated annual cost, then subtract the credit to see the effective first-year cost.

How £100 bill credit energy deals work (and what to check)

A bill credit is usually a one-off amount added to your energy account balance. It reduces the amount you owe on future bills. It is not always paid into your bank account. Suppliers set their own eligibility and timelines, so it’s worth checking the terms before committing.

  1. 1) You choose a fixed tariff

    Pick a fixed deal based on unit rates, standing charges, term length, exit fees, and whether the £100 credit applies to your situation.

  2. 2) Your switch completes

    Your new supplier takes over the supply. You’ll receive a welcome pack and tariff information. This is typically when the clock starts for any credit conditions.

  3. 3) Credit is applied to your account

    The £100 credit may be applied after a set period (for example, after your first bill, or within a stated number of days). It can be split across fuels for dual fuel deals.

  4. 4) You keep the benefit by meeting the terms

    Some deals require you to remain on supply for a minimum period. Leaving early could mean the credit is removed and/or you pay exit fees—check the supplier’s rules.

What to check on the tariff details

Item Why it matters What to look for
Credit amount Some offers are £100; others differ or are split across fuels. Is it £100 total, or e.g. £50 gas + £50 electricity?
When it’s applied Timing affects cashflow and your first few bills. After first bill, within X days, after Y months, etc.
Minimum time on supply Leaving early could remove the credit or trigger exit fees. Any conditions (e.g. must remain for 3–6 months).
Exit fees Exit fees can outweigh bill credit if you change plans. Fee per fuel and whether it changes over time.
Direct Debit vs pay on receipt Some credit offers are only for Direct Debit tariffs. Payment method requirements and any discounts.
Estimated annual cost The most useful single comparison figure for most homes. Compare like-for-like usage assumptions and region.

Eligibility for fixed deals with £100 credit (UK homes)

You can usually switch if…

  • You’re a UK domestic energy customer (not business supply)
  • You’re responsible for the energy account (or can get account-holder approval)
  • Your address has standard gas/electricity meters (smart meters are fine)
  • You can pass supplier checks (where required)

£100 bill credit conditions can include…

  • New-customer only (or not available to recent customers)
  • A requirement to pay by monthly Direct Debit
  • A minimum time on supply before the credit is applied
  • Specific tariffs only (not all fixed tariffs include incentives)

If you’re currently in a fixed deal

You can still compare, but check whether your current supplier charges an exit fee for leaving early. If your fixed term is ending soon, it’s often worth comparing now so you’re ready to switch at the right time.

How to tell if a £100 credit fixed tariff is actually good value

A credit offer is easy to understand, but the best deal depends on your home’s usage, your region, and the tariff structure. Here are practical ways to compare fixed energy tariff deals with £100 bill credit in the UK.

1) Compare annual cost first

Start with the tariff’s estimated annual cost based on your usage. That prevents a credit from distracting you from higher ongoing rates.

2) Subtract the credit carefully

If the credit is applied after a set period, consider whether you’ll stay long enough to receive it and keep it under the terms.

3) Check exit fees vs flexibility

A high exit fee can wipe out a £100 incentive if your circumstances change. If you prefer flexibility, consider deals with low or no exit fees.

Comparison approach Best for Watch-outs
Lowest estimated annual cost Most households wanting a simple benchmark Ensure usage assumptions match your home
Best first-year value (incl. £100 credit) People who expect to stay on supply long enough Credit timing/conditions may reduce real value
Lowest risk (low exit fees) Renters or anyone likely to move May not include the biggest incentives

Regional note: Electricity standing charges and unit rates can vary by region. That’s why comparing by postcode is essential for accurate results across England, Scotland and Wales.

Common mistakes when choosing bill credit energy deals

Focusing on the £100 and ignoring rates

A tariff with higher unit rates can cost more overall than a cheaper fix without an incentive. Always compare the estimated annual cost.

Missing the credit timing

Some credits are applied after a stated period. If you switch again before then, you may not receive it.

Not checking exit fees

Fixed tariffs often have exit fees. If you might move home or change tariff soon, factor this in before choosing a long fix.

Assuming credit is cash

Most bill credits reduce your energy balance rather than being paid to your bank. Read the supplier wording so there are no surprises.

Compare fixed deals now Read FAQs

FAQs: fixed energy tariffs with £100 bill credit

Is a £100 bill credit guaranteed?

No. Bill credit depends on the supplier offer and you meeting their eligibility and terms. We recommend checking the tariff’s key information (when credit is applied, payment method requirements, and any minimum supply period) before switching.

Will the credit be paid into my bank account?

Usually not. “Bill credit” typically means the amount is added to your energy account and offsets future charges. Some suppliers may use different wording for cash incentives; always read the supplier’s description.

Can I get £100 bill credit on electricity-only or gas-only?

Sometimes. Many incentives are targeted at dual fuel switches, but electricity-only and gas-only offers can exist. Availability varies by supplier, region, and tariff.

Do fixed tariffs always have exit fees?

Not always, but many do. Exit fees are typically charged per fuel if you leave before the fixed term ends. If you value flexibility, consider shorter fixes or low/no exit fee tariffs where available.

How long does switching take in the UK?

Switching times can vary. Your new supplier will confirm the start date and keep you updated. You won’t be left without energy—only the billing supplier changes.

Will I need a smart meter to switch?

No. You can switch with standard meters or smart meters. If you have a smart meter, it can help provide accurate readings, but it’s not usually a requirement for a fixed tariff.

What happens to my credit balance when I switch?

Your existing supplier should produce a final bill. If you’re in credit, they normally refund it. If you owe money, you’ll need to pay the final balance. Your new supplier starts billing from your switch date.

Want personalised options? Use the comparison form and we’ll help you check fixed tariffs and any bill credit deals available for your postcode.

What customers like about switching with a comparison service

“I wanted a fixed deal and didn’t want to miss any credit offers. Seeing the terms clearly made the choice easier.”
Homeowner, West Midlands
“The comparison focused on total cost, not just the headline incentive. That’s what I needed.”
Flat renter, Greater London
“Quick form, helpful follow-up, and I understood when the bill credit would be applied.”
Family home, Lancashire

Trust & transparency

  • We’re a whole-of-market comparison service for UK homes
  • We focus on key tariff terms: rates, standing charges, exit fees, and incentives
  • You’ll see the details you need before making a switching decision

Ready to compare fixed energy tariffs with £100 bill credit?

Submit your details once and we’ll help you review whole-of-market fixed deals available for your home—including any bill credit offers—so you can choose on total cost, not just the headline incentive.

  • Compare gas, electricity or dual fuel
  • Understand credit timing and exit fees
  • Switch with confidence
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Updated on 14 Feb 2026