Can I get a cheaper energy tariff when my fixed deal ends?

Yes. When your fixed tariff ends you can usually switch to another tariff (with your current supplier or a new one). Compare unit rates (p/kWh) and standing charges, check the tariff length and exit fees, and switch as soon as your current fix is within its penalty-free window (typically the last 49 days).

When should I start looking for a new tariff?

Start reviewing prices before your end date and aim to agree a new tariff in the final 49 days of your fixed term. In many cases you can switch during this window without paying an early exit fee, helping you lock in a better deal before your tariff rolls onto a more expensive variable rate.

What happens if I do nothing when my fix ends?

If you take no action, your supply will normally move to your supplier’s default variable tariff. This can cost more than a competitive fixed deal. To avoid overpaying, compare your options and choose a new tariff before the end date whenever possible.

How do I check if a tariff is actually cheaper?

Compare the unit rate (p/kWh) and the standing charge (p/day) for both electricity and gas, and estimate your annual cost based on your usage. A ‘cheaper’ tariff is the one with the lower total cost for your consumption—not just a lower headline unit rate.

Will I pay an exit fee if I switch?

You may pay an exit fee if you leave a fixed tariff early, but many suppliers waive exit fees in the final 49 days of your contract. Check your tariff terms or account to confirm the end date and any fees before you switch.

Can I renew with my current supplier and still save money?

Often, yes. Suppliers may offer renewal tariffs that are cheaper than their variable rate and can sometimes be competitive with switching. Compare renewal offers with other available tariffs and choose the option with the lowest total annual cost and the right balance of price certainty and flexibility.

What information do I need to switch energy tariffs?

You’ll typically need your address and postcode, your current supplier details, and up-to-date meter readings (or smart meter data). Having recent usage in kWh (from bills or your online account) helps you accurately compare total costs.

How long does switching take and will my supply be interrupted?

Switching normally completes in a few days to a few weeks depending on the process and any cooling-off period, but your energy supply stays on throughout. You won’t be cut off just because you change tariff or supplier.

Is a fixed tariff always better than a variable tariff?

Not always. Fixed tariffs offer price certainty for a set period, while variable tariffs can move up or down. The best choice depends on current market prices, your budget preferences, and whether you value flexibility or stability. Comparing the total cost and the terms (length, fees) is the fastest way to decide.

What’s the quickest way to start saving when my fix ends?

Check your fixed end date, compare available tariffs using your typical usage, and secure a new deal during the penalty-free window if you’re on a fixed tariff. If you’re unsure, prioritise tariffs with competitive standing charges and unit rates, a suitable term length, and clear exit-fee terms.

Can I get a cheaper energy tariff when my fix ends?

Usually, yes — but it depends on your meter, payment method, region and how far you are from your end date. This guide explains your options, how switching works in the UK, and the common traps to avoid.

Check your fix end date and any exit fees before you move
Compare new fixes vs flexible tariffs using estimated yearly cost
Lock in early where allowed (often in the last 49 days) to avoid rollover

Get your energy quote How switching works

Estimates vary by supplier, region and usage. Always check tariff terms and your current supplier’s end date and exit fees.

Fast answer: yes, you can often move to a cheaper tariff — and you don’t have to wait until the exact end date

In the UK, you can normally switch or agree a new tariff before your fixed deal ends. Many suppliers let you secure a new tariff in the last 49 days (about 7 weeks) of your fix without an exit fee — but it’s not universal, so check your current tariff terms.

Best time to compare

Start looking 6–8 weeks before your end date. That’s when you can often line up a new tariff and avoid rolling onto your supplier’s standard variable tariff (SVT).

When “cheaper” isn’t just unit rate

Check standing charges, exit fees, payment method (Direct Debit vs prepay), and whether you have a smart meter / Economy 7.

What happens if you do nothing

Most fixes end by moving you onto the supplier’s SVT (often pricier than a good fix). You can still switch later, but you may pay more in the meantime.

Quick check: Find your tariff end date on a recent bill, in your online account, or by asking your supplier. If you’re unsure about exit fees, ask for the exact amount and whether they’re waived in the final weeks.

Compare tariffs before your fix ends (and avoid a costly rollover)

If your fixed tariff is ending soon, you typically have three routes:

1) Take your current supplier’s renewal offer: Often the quickest. Sometimes competitive, sometimes not. Always compare the estimated annual cost and check if it includes a loyalty discount that expires.
2) Switch supplier to a new fixed deal: Can be cheaper and gives price certainty. Check contract length, exit fees, and whether the tariff requires a smart meter or Direct Debit.
3) Move to a flexible tariff (SVT or similar) temporarily: Useful if you expect prices to fall or you’re moving home. Costs can change, so it’s less predictable month-to-month.

Tenants and moving home: You can usually switch even if you rent, but check your tenancy details and keep the landlord informed if meter access is needed. If you’re moving soon, you may prefer a flexible tariff to avoid exit fees.

How switching works in the UK (what to expect)

You compare tariffs using your postcode, fuel type (gas/electricity), payment method and estimated usage (kWh).
You apply for the new tariff (same supplier or new supplier). You’ll see unit rates, standing charges, contract length and exit fees.
Switching starts and you’ll receive confirmation plus key documents. You usually get a cooling-off period.
Meter readings are agreed to close your old account and open the new one. Smart meters can help, but you can also provide readings manually.
Your supply stays on during the switch. You won’t lose gas or electricity just because you change tariff or supplier.

Timing tip: If your current fix has exit fees, compare the cost of leaving early against the expected savings. A slightly cheaper tariff may not be worth it if the exit fee is high.

Get a whole-of-market quote

Tell us a few details and we’ll help you compare available home energy tariffs. It’s free, and you can decide with no obligation.

What you’ll need (2 minutes)

Your postcode and whether you have gas, electricity or both
Approximate annual usage (kWh) from a bill (helpful but not essential)
Your current fix end date and any exit fee (if applicable)

New fix vs flexible: a practical comparison (UK households)

Use this as a decision aid. Exact pricing varies by supplier, region, meter type and payment method.

Option	Best for	Watch-outs	Key checks before you agree
Fix with current supplier	Convenience; minimal admin; you’re happy with service	Renewal offers aren’t always cheapest; terms can change	Unit rate + standing charge; contract length; exit fees; Direct Debit requirement
Switch to a new supplier fix	Maximising value; price certainty for 12–24 months	Exit fees if you change again; eligibility limits for some tariffs	Meter type (smart/prepay/Economy 7); estimated annual cost; customer support; switching timeline
Flexible tariff (SVT or similar)	Short-term flexibility; moving home; avoiding exit fees	Prices can change; budgeting is harder	How often rates can change; your current supplier’s SVT pricing; when you’ll review again
Do nothing (rollover)	Rarely ideal; only if you need time	You’ll likely pay more than necessary until you act	Set a reminder; compare within days; take a meter reading at end date

Decision checklist (quick)

End date known? If not, find it first.
Exit fee applies? Check amount and whether it’s waived near end date.
Payment method? Direct Debit tariffs can differ from prepay/receipt-of-bill.
Meter type? Smart, traditional, Economy 7, or prepay can limit options.
Standing charge vs unit rate? Don’t judge on headline unit rate alone.
Contract length? Choose based on how long you expect to stay.

Who switching early often suits

Your fix ends in 6–8 weeks and you want to avoid SVT rollover
You can pay by monthly Direct Debit (often wider tariff availability)
You want price certainty for budgeting

Who it may not suit (or needs care)

You’re moving home soon (exit fees can bite)
Your current tariff has a high exit fee and you’re not in the fee-free window
You have a complex setup (e.g. Economy 7, prepay) and need like-for-like comparisons

Two realistic scenarios (with numbers)

These examples are illustrative to show how to think about the decision. Your actual prices depend on your region, usage, tariff availability, and your supplier’s terms.

Scenario A: Fix ends in 4 weeks, exit fees waived near end date

Household: dual fuel, monthly Direct Debit, typical usage. Assumption: exit fee is £0 within the final 49 days (check your terms).

Current fix ends soon; supplier’s SVT estimate: £1,780/year
Best available fix you can secure now: £1,680/year (estimated)

If you switched and the estimate held, the difference is about £100/year (around £8.33/month). It may be worth it if you value certainty and will stay for the contract length.

Reality check: A tariff with a higher standing charge can still be cheaper overall for high-usage homes — always compare the estimated annual cost using your kWh if possible.

Scenario B: Fix ends in 3 months, leaving today triggers an exit fee

Household: electricity-only flat, low usage. Assumption: exit fee is £75 if you leave before the fee-free window.

Current fix estimate: £920/year
Cheaper fix available now: £860/year (estimated)

Estimated difference is £60/year (~£5/month). If you pay a £75 exit fee, you’d likely be worse off over the year unless there are other benefits (e.g. service, features) or prices rise sharply later.

What many people do: set a reminder for ~7 weeks before the end date, then re-compare when exit fees are more likely to be waived.

Important: These numbers are simplified. Real comparisons should use your meter type and annual kWh (or a recent bill) and consider how much time remains on your current fix.

Costs, exclusions and common pitfalls (so you don’t get caught out)

Exit fees

Fixed tariffs often charge exit fees if you leave early. Some suppliers waive them near your end date, but rules vary. Ask for the exact fee today and the date it becomes £0.

Standing charges can outweigh unit rates

Low users (e.g. small flats) can be hit harder by high standing charges. High users may care more about unit rates. Always check both.

Meter type limits

Prepayment, Economy 7/10, or some smart meter setups can restrict tariff choice. Make sure you compare like-for-like (e.g. Economy 7 day/night rates).

Direct Debit assumptions

Many best-value tariffs assume monthly Direct Debit. If you prefer receipt-of-bill or prepay, compare the options available for that payment type.

Regional pricing differences

Energy rates and standing charges vary by region (your electricity distribution area). A deal your friend gets elsewhere may not be available at the same price in your postcode.

Timing: don’t miss the end date

If you let the fix end without action, you’ll usually move to SVT automatically. Set a reminder for 8 weeks before and again for 2 weeks before.

If you’re in debt to your supplier: you may still be able to switch in some situations, but rules depend on the type of debt and meter (especially prepay). If you’re struggling, get independent help from Citizens Advice.

FAQs

How early can I switch before my fix ends?

You can usually agree a new tariff before the end date. Whether you’ll pay an exit fee depends on your current tariff. Many suppliers waive exit fees in the last 49 days, but you should confirm your specific terms.

Will I be automatically moved to a more expensive tariff?

Often, yes. When a fixed deal ends, suppliers typically move you onto their standard variable tariff (SVT). It may be cheaper than a new fix in some periods, but it’s commonly higher than the best available deals.

Can I switch if I have a smart meter?

Yes. Smart meters don’t stop you switching supplier. In some cases, smart functionality may temporarily operate in “traditional mode” after switching, depending on the meter and supplier, but you’ll still get energy.

I’m on Economy 7 — can I get a cheaper deal when my fix ends?

Possibly, but compare carefully. Economy 7 has separate day and night unit rates, and the best option depends on how much electricity you use overnight. Ensure any quote is specifically for Economy 7 (or confirm if switching to single-rate makes sense for you).

What if I’m on a prepayment meter?

You may have fewer tariffs available than Direct Debit customers, but you can still compare and, in some cases, switch. If you want to move from prepay to credit meter, you’ll usually need a supplier process and may need to pass checks.

Do I need my annual usage (kWh) to compare?

It helps a lot. Quotes based only on a postcode and “typical usage” can be less accurate. If you can, use your last 12 months’ kWh from your bill or online account for a more reliable estimate.

Could my Direct Debit change after I switch?

Yes. Suppliers can adjust Direct Debits based on your usage, tariff rates and account balance. If you think it’s set too high or low, ask for the calculation and provide up-to-date meter readings.

Will switching affect my Warm Home Discount or benefits-related support?

The Warm Home Discount is applied by eligible suppliers under scheme rules and eligibility criteria can vary by year. If you receive support, check the implications before switching and confirm with the supplier you’re moving to.

Trust, methodology and sources

Article details

Written by: EnergyPlus Editorial Team
Reviewed by: Energy Specialist
Last updated: March 2026

How we assess whether you can get a cheaper tariff

We focus on what changes at the end of a fixed tariff and what UK households can realistically do to reduce costs without taking on avoidable risk.

Tariff timing: we explain the common “end-of-fix” window and why acting ~6–8 weeks early can help avoid SVT rollover.
Total cost: we prioritise estimated annual cost (unit rate + standing charge) rather than headline unit rates.
Eligibility: we account for differences by region, meter type (smart, prepay, Economy 7), and payment method.
Friction and risk: we flag exit fees, moving-home risk, and when flexibility may be better than a long fix.

Limitations: Tariff availability can change quickly and some deals are supplier- or meter-specific. The example numbers on this page are illustrative and not a promise of savings.

Sources (UK)

Ofgem (UK energy regulator) — consumer guidance, switching rules and market information.
Citizens Advice: Energy — independent help on bills, switching and problems with suppliers.
GOV.UK — official government information including cost support schemes when available.

Ready to see if you can pay less when your fix ends?

Compare home energy tariffs based on your postcode and setup. We’ll show options that fit your meter and payment method, with clear estimated costs.

Start your comparison Re-read the fast answer

Tip: Have your fix end date and a recent bill handy. Using your annual kWh usually makes the estimate more accurate.

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Updated on 21 Mar 2026